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Prelithiation of silicon encapsulated in MOF-derived carbon/ZnO framework for high-performance lithium-ion battery 认领 引用 被引量：2
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作者 Congcong Liu Yang Yang +6 位作者 Yu Yao Tao Dai Shitan Xu Shoumeng Yang Ghulam Ali Xianhong Rui Yan Yu 《Nano Materials Science》 EI CAS CSCD 2026年第2期298-306,共9页
Silicon possesses a high theoretical capacity,making it a potential contender for lithium-ion battery(LIB)anodes.Nonetheless,its practical usage is challenged by low electrical conductivity and significant volume expa... Silicon possesses a high theoretical capacity,making it a potential contender for lithium-ion battery(LIB)anodes.Nonetheless,its practical usage is challenged by low electrical conductivity and significant volume expansion during cycling.Here,we synthesized a novel silicon/carbon(Si/C)anode doped with ZnO via a template-derived method and high-temperature carbonization.The carbon structure,originated from metal-organic frameworks(MOFs)and ZnO doping,substantially enhanced the electrochemical properties of the composite material.It exhibited an initial capacity of 2100.3 mA h g-1at a current density of 0.2 A g-1and demonstrated excellent capacity retention over successive cycles.Moreover,the composite material displayed superior rate performance at higher current densities of 2 A g-1and 3 A g-1.To address the low initial Coulombic efficiency(ICE)of siliconbased materials,we adopted a direct contact prelithiation approach and optimized the lithiation process by controlling the prelithiation time.After 30 min of prelithiation,the ICE reached 97.9%,thereby reducing the initial irreversible capacity loss(ICL)and realizing stable discharge-charge in subsequent cycles.This rational design provides valuable insights for achieving high-performance silicon anode. 展开更多
关键词 Metal-organic frameworks Silicon ZnO Prelithiation Lithium-ion batteries
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Synergistic fluorinated and non-fluorinated solvents for electrolytes of lithium-ion batteries at low temperatures 认领 引用 被引量：1
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作者 Xuning Gao Nan Piao +7 位作者 Yukun Yan Jinghao Wang Haolun Zou Siqi Guan Leiying Zeng Zhenhua Sun Guangjian Hu Feng Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第2期582-587,共6页
Commercial carbonate electrolytes suffer from ion transport difficulty in bulk electrolytes and interphase at low temperatures,bringing challenges to the application of lithium-ion batteries(LIBs)at low temperatures.H... Commercial carbonate electrolytes suffer from ion transport difficulty in bulk electrolytes and interphase at low temperatures,bringing challenges to the application of lithium-ion batteries(LIBs)at low temperatures.Herein,the ester solvent of methyl propionate(MP)with low melting point and low viscosity was used to tackle ion transport difficulty in electrolytes.Fluorinated ester was further added to accelerate interfacial transport through intermolecular interactions.The influence of fluorinated esters with different fluorination degrees on the solvation structure of electrolytes and the performance of batteries was further studied.As a result,methyl pentafluoropropionate(M5F)with five fluorine atoms was selected for its optimal interactions with both Li+and MP solvent in the primary solvation structure,contributing to desired solvation structure for fast interfacial transport.The LiFePO4(LFP)||graphite cell with LiFSI-MP-M5F electrolyte exhibited a high cyclability of 85.8%after 120 cycles and retained 81.2%of room-temperature capacity when charged and discharged at−30℃.1 Ah LFP||graphite pouch cell with high cathode loading(20 mg/cm2)in LiFSI-MP-M5F electrolyte exhibited 0.85 Ah capacity when charged and discharged at−20℃.This work provides a guidance for electrolyte design by synergistic fluorinated and non-fluorinated solvents for LIBs at low-temperature application. 展开更多
关键词 Lithium-ion batteries Electrolyte Fluorinated solvent Non-fluorinated solvent Solvation structure Low temperatures
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Unified physics-informed subspace identification and transformer learning for lithium-ion battery state-of-health estimation 认领 引用
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作者 Yong Li Hao Wang +3 位作者 Chenyang Wang Liye Wang Chenglin Liao Lifang Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期350-369,I0009,共20页
The growing use of lithium-ion batteries in electric transportation and grid-scale storage systems has intensified the need for accurate and highly generalizable state-of-health(SOH)estimation.Conventional approaches ... The growing use of lithium-ion batteries in electric transportation and grid-scale storage systems has intensified the need for accurate and highly generalizable state-of-health(SOH)estimation.Conventional approaches often suffer from reduced accuracy under dynamically uncertain state-of-charge(SOC)operating ranges and heterogeneous aging stresses.This study presents a unified SOH estimation framework that integrates physics-informed modeling,subspace identification,and Transformer-based learning.A reduced-order model is derived from simplified electrochemical dynamics,providing an interpretable and computationally efficient representation of battery behavior.Subspace identification across a wide SOC and SOH range yields degradation-sensitive features,which the Transformer uses to capture long-range aging dynamics via multi-head self-attention.Experiments on LiFePO4 cells under joint-cell training show consistently accurate SOH estimation,with a maximum error of 1.39%,demonstrating the framework’s effectiveness in decoupling SOC and SOH effects.In cross-cell validation,where training and validation are performed on different cells,the model maintains a maximum error of 2.06%,confirming strong generalization to unseen aging trajectories.Comparative experiments on LiFePO4and public LiCoO2datasets confirm the framework’s cross-chemistry applicability.By extracting low-dimensional,physically interpretable features via subspace identification,the framework significantly reduces training cost while maintaining high SOH estimation accuracy,outperforming conventional data-driven models lacking physical guidance. 展开更多
关键词 Lithium-ion battery Transformer learning Physics-informed modeling Subspace identification State-of-health estimation
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Parameter identification method of multi-particle model for lithium-ion batteries 认领 引用
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作者 Junfu Li Xiaolong Li +2 位作者 Xueli Hu Quanqing Yu Zhaowei Zhang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第1期440-452,共13页
Electrochemical models,characterized by high fidelity and physical interpretability,have been applied in var-ious fields such as fast charging,battery state estimation,and battery material design.Currently,widely util... Electrochemical models,characterized by high fidelity and physical interpretability,have been applied in var-ious fields such as fast charging,battery state estimation,and battery material design.Currently,widely utilized single particle-based model exhibits high computational efficiency but suffers from low simulation accuracy under high-rate charge/discharge conditions.In this work,an electrochemical model for lithium-ion batteries based on multi-particle hypothesis is developed.Two particles are employed to represent the electrode char-acteristics of the positive and negative electrodes,respectively.Through theoretical derivation,mathematical equations are established to describe various processes within the battery,including solid-phase diffusion,li-quidphase diffusion,reaction polarization,and ohmic polarization.In addition,a method for obtaining model parameters is proposed.Finally,the model is experimentally validated by using lithium iron phosphate and nickel-cobalt-manganese lithium-ion batteries under constant current conditions.The identified battery elec-trochemical model parameters are within reasonable accuracy as evidenced by the experimental validation results. 展开更多
关键词 Lithium-ion battery Electrochemical model Multi-particle assumption Parameter identification
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AI-augmented electrochemical model for lithium-ion battery:Recent advances and perspectives 认领 引用
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作者 Juncheng Fu Zhengxiang Song +4 位作者 Jinhao Meng Jia Guo Kun Yang Wenchao Liu Le Huan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期1056-1080,I0021,共25页
With the rapid development of electric vehicles and grid-scale renewable integration,the demand for lithium-ion batteries(LIBs)has significantly increased with high expectations on enhanced energy density,cycle stabil... With the rapid development of electric vehicles and grid-scale renewable integration,the demand for lithium-ion batteries(LIBs)has significantly increased with high expectations on enhanced energy density,cycle stability,and failure resilience.Electrochemical models(EMs),serving as pivotal mechanismdriven analytical frameworks in battery research and applications,demonstrate unprecedented quantitative fidelity in characterizing intricate multi-physics dynamics for the next-generation battery management systems(BMS).The breakthrough innovations in artificial intelligence(AI)driven methods have revolutionized the dynamic modeling of LIBs.However,the deployment of AI-augmented EMs in BMS faces significant identifiability challenges due to strong parameter coupling.In addition,research on model simplification,parameter determination,and dynamic parameter identification remains largely fragmented.There is a lack of a comprehensive review to pave the way for the cross-domain innovations in BMS.To fill this gap,this paper presents a systematic review of the EMs for LIBs and examines the advancements in parameter determination techniques from both experimental measurement and numerical simulation perspectives.Besides,a comprehensive assessment of the progress in parameter identification from the standpoint of dynamic recognition is presented,encompassing both modelbased approaches and intelligent methods.Additionally,from the BMS standpoint,the strengths and limitations of existing approaches are evaluated.Finally,a coordinated framework for multi-stage identification needs to be established in the future.The potential of digital twins(DT),deep reinforcement learning(DRL),and large language models(LLMs)in enhancing EMs also warrants further exploration.The purpose of this work is to provide insights and guidance for the future development of EMs in LIB applications. 展开更多
关键词 Lithium-ion battery Parameterization Dynamic electrochemical model Intelligent approach
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Thermal runaway in lithium-ion battery systems with hybrid electrical connections:Propagation induced by spontaneous overcharge without heat transfer 认领 引用
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作者 Zhizuan Zhou Maoyu Li +2 位作者 Lun Li Ping Zhang Lizhong Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期832-846,I0020,共15页
Lithium-ion batteries(LIBs)are inevitably connected in parallel and in series to satisfy the high-voltage and high-power requirements of practical applications.However,most efforts focus on thermal runaway(TR)in the b... Lithium-ion batteries(LIBs)are inevitably connected in parallel and in series to satisfy the high-voltage and high-power requirements of practical applications.However,most efforts focus on thermal runaway(TR)in the batteries adopting open-circuit or single electrical connection configurations,neglecting the potential influence of hybrid electrical connections.This oversight contributes to the discrepancies between TR disasters observed at the experimental scale and those occurring in real-world scenarios.To address the issue,this study systematically investigates the TR characteristics of battery modules with different hybrid connections(open circuit,1S3P,2S3P,3S3P,and 4S3P)and elucidates the mechanisms of TR propagation in the absence of heat transfer.The results show that the initial TR in 1S3P and 2S3P battery modules can be advanced to the opening of safety valve owing to the transferred electric energy between parallel submodules.In contrast to conventional thoughts,without the involvement of heat transfer,TR propagation may still occur in battery systems with series-parallel connections.Although the heat transfer is completely blocked,the adjacent battery connected in series with the TR battery in 2S3P module still suffers from TR owing to the spontaneous overcharge,and batteries in 3S3P and 4S3P battery modules all experience severe side reactions accompanied by significant expansions.Moreover,spontaneous overcharge is driven by voltage imbalances between parallel submodules in series-parallel battery systems,driving charge transfer that results in overcharging of adjacent batteries.The severity of this effect is governed by the voltage increment between neighboring batteries,while its influence weakens as the number of series-connected batteries increases.Overall,this study reveals an additional pathway,electricity transfer,that can also result in TR disasters in practical battery systems,providing novel insights for TR disaster mechanisms and guides for safe battery system design. 展开更多
关键词 Lithium-ion battery safety Thermal runaway Series-parallel connection Spontaneous overcharge Thermal runaway propagation
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Revisiting the Modification Strategies of Alloy-Base Anode for Solid-State Lithium-Ion Batteries Through Deconstructing Anode-Interface-Solid Electrolyte 认领 引用
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作者 Yueying Chen Hanyi Yu +7 位作者 Yuerui Lin Cong Liu Akif Zeb Zijian Cai Hongzhe Chu Yuhong Luo Xiaoming Lin Jiaye Ye 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第10期136-264,共129页
In recent years,advanced battery systems based on solid electrolytes have become a research hotspot to replace traditional liquid lithium-ion batteries due to their significant advantages in energy storage performance... In recent years,advanced battery systems based on solid electrolytes have become a research hotspot to replace traditional liquid lithium-ion batteries due to their significant advantages in energy storage performance and safety.The alloy anode materials(such as Si,Sn,and P)have attracted much attention due to their significantly higher theoretical capacity than graphite.This article systematically reviews the characteristics,key challenge and the latest progress of alloy-solid-state batteries at the anode and solid electrolyte levels.It is emphasized that through strategies such as structural design,material composite,surface engineering and overall electrode system optimization,the volume expansion problem of alloy materials during the cycling process can be alleviated.Meanwhile,in-depth analyses of the dynamic evolution of the interface of solid electrolytes,the kinetics of lithium-ion transport,and the failure mechanisms and innovative strategies in terms of mechanical properties have also been conducted.In addition,this paper introduces the in-depth analysis of the dynamic mechanism in the lithiation process through advanced in situ characterization techniques and multi-physics field simulation methods,thereby providing theoretical guidance for material design.Finally,the potential directions and future opportunities for promoting the development of solid-state batteries with alloy-based anodes are explored. 展开更多
关键词 Alloy anode Solid electrolyte Solid-state batteries Solid-state lithium-ion batteries
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An acid-free process for the selective recovery of lithium from spent ternary lithium-ion batteries 认领 引用
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作者 ZHANG Kun YANG Jian +2 位作者 JIANG Liang-xing LAI Yan-qing XU Kai-hua 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第4期1613-1625,共13页
With the dramatic accumulation of the end-of-life lithium-ion batteries,their recycling is attracting extensive attention worldwide.To address the problem of low lithium recovery in the current typical hydrometallurgy... With the dramatic accumulation of the end-of-life lithium-ion batteries,their recycling is attracting extensive attention worldwide.To address the problem of low lithium recovery in the current typical hydrometallurgy recovery process,this research uses sodium bisulfate as an auxiliary roasting reagent to extract lithium from spent lithium-ion batteries through sulphation roasting,which can enhance the lithium recovery rate significantly.A systematic study of the sulphation roasting process and the mechanisms was carried out with experiments,thermodynamic calculations,and characterization of the roasted sample phases.The results showed that at a roasting temperature of 600℃,NaHSO4·H2O/spent LiNixCoyMnzO2 cathode powders(S-NCM)mass ratio of 1.2,and roasting time of 60 min,95% selective dissolution of lithium was acquired,while the leaching rates of Ni,Co,and Mn were confined under 1%.During roasting,the NCM layered structure collapses and the lithium is transformed into the LiNaSO4 phase,while the transition metals transform into Ni6MnO8 and MnCo2O4 phases.The removal of impurity ions from the lithium-rich leaching solution and the generation of Li2CO3 were achieved by a combination of thermodynamic calculations and experiments. 展开更多
关键词 spent lithium-ion batteries sulfation roasting selective extraction lithium recovery
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Upcycling Spent Graphite into Fluorine-Doped Reduced Graphene Oxide Anodes for High-Performance Lithium-Ion Batteries 认领 引用
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作者 LI Fei XING Baolin +4 位作者 WANG Zhenshuai HOU Yida YANG Lei ZENG Huihui PAN Qiaoqiao 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第3期623-638,共16页
Fluorine-doped reduced graphene oxide(FRGO)was synthesized from spent graphite(SG)by first producing reduced graphene oxide(RGO)via potassium permanganate-assisted oxidation and thermal reduction,followed by fluorinat... Fluorine-doped reduced graphene oxide(FRGO)was synthesized from spent graphite(SG)by first producing reduced graphene oxide(RGO)via potassium permanganate-assisted oxidation and thermal reduction,followed by fluorination with lithium hexafluorophosphate.The optimized material,FRGO-3,exhibited an expanded interlayer spacing of 0.375 nm,an ultrahigh specific surface area of 1433.86 m2·g-1,and a high fluorine doping content of 3.6%.Fluorine incorporation was predominantly achieved in semi-ionic and covalent C-F configurations.Owing to these structural and chemical characteristics,FRGO-3 demonstrated remarkable lithium storage performance,including a high reversible capacity of 1323 mAh·g-1 at 50 mA·g-1 and a retained capacity of 489 and 318 mAh·g-1 even at a high current density of 1000 and 2000 mA·g-1,along with excellent cycling stability.These results underscore its potential as an advanced anode material for highperformance lithium-ion batteries(LIBs).This work presents an efficient and scalable approach for the regeneration of waste graphite while unlocking its promise for sustainable LIB applications. 展开更多
关键词 spent graphite reduced graphene oxide fluorine-doped lithium-ion batteries
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Structural Modification and Deformable Design of Electrospun Sn@C Nanofiber Anodes Through Oxide Doping for Flexible Lithium-Ion Batteries 认领 引用
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作者 Yu Xin Jiaxiang Li +4 位作者 Zhiyan Wang Chang Miao Shi Pan Chengjin Liu Wei Xiao 《Rare Metals》 SCIE EI CAS CSCD 2026年第5期655-666,共12页
Size-controllable Sn nanoparticles are designed in this work via oxide doping to be uniformly embedded into flexible N-doped carbon nanofibers,in which the agglomeration and migration of Sn are effectively restrained ... Size-controllable Sn nanoparticles are designed in this work via oxide doping to be uniformly embedded into flexible N-doped carbon nanofibers,in which the agglomeration and migration of Sn are effectively restrained due to the suppressive effect of selected oxides,including SiO2,TiO2,and ZnO.Benefiting from unique merits of the embedment structure,such as ultrahigh aspect ratio,superior adhesion,and ideal stability,the flexible freestanding and highly robust electrode(Sn/TiO2@C,STC)is fabricated and exhibits a reversible specific capacity of 968.4 mAh g-1after 100 cycles at 0.1 A g-1.Moreover,the STC electrode contributes to a cycle lifespan of over 1000 cycles with a high specific capacity of 519.7 mAh g-1at 1.0 A g-1and a capacity decay as low as 0.00185%per cycle.Remarkably,practical application potential of the STC electrode was demonstrated by being assembled into a pouch cell,which not only works stably under bending states but also presents a specific capacity of 954.8 mAh g-1after 150 cycles at 0.1 A g-1.This composite fiber anode avoids extra use of polymer binder,current collector,and conductive additive,and exhibits a great potential in the practical application of flexible energy storage devices. 展开更多
关键词 deformable design lithium-ion battery nanofiber anode oxide doping structural modification
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Insights Into Ni2+-Dominated Phase Regulation of Accordion-Shaped CuNb2O6 Framework Toward Lithium-Ion Capacitors 认领 引用
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作者 Xu-Ting Li Chao Cheng +4 位作者 Hao Jiang Min-Yu Jia Zhen-Xiang Zhao Lin-Rui Hou Chang-Zhou Yuan 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期392-404,共13页
The monoclinic CuNb2O6(M-CNO)with a columbite structure is a potential anode candidate for advanced lithium-ion capacitors(LICs).However,its practical application is plagued seriously by the irreversible phase t... The monoclinic CuNb2O6(M-CNO)with a columbite structure is a potential anode candidate for advanced lithium-ion capacitors(LICs).However,its practical application is plagued seriously by the irreversible phase transformation and sluggish kinetics.For this,herein,we develop an adjustable Cu-site Ni substituting strategy to regulate the phase transition(i.e.,NixCu1-xNb2O6)from M-CNO to orthorhombic NiNb2O6.With the fine optimization in Ni substitution,the stresshermal-induced phase transformation and the initial electrochemical conversion are effectively prevented in the optimal Ni0.5Cu0.5Nb2O6(55NCNO).Moreover,elaborate experimental observation and theoretical calculations synergistically authenticate that the orthorhombic 55NCNO phase is endowed intrinsically with both superb Li+and electronic conductivities,thanks to its large two-dimensional Li+diffusion channel and narrow band gap.Benefiting from such appealing merits,55NCNO with the solid-solution Li+-storage mechanism obtains attractive high-rate capacities and cycling stability,when evaluated as a competitive anode for LICs.Besides,the 55NCNO constructed LICs display a striking energy density of 49.5 Wh kg-1 at 10.8 kW kg-1 along with long-span cycle life(just 0.0065% capacitance decay per cycle).More significantly,the heteroatomic substitution methodology here will guide future design of advanced anodes for next-generation LICs,and propel their practical advancement. 展开更多
关键词 lithium-ion capacitors NixCu1-xNb2O6 Ni substitution phase-transition regulation solid-solution anode
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Unlocking high-rate MXenes as lithium-ion battery anodes viaΣ7 coincidence site lattice grain boundaries 认领 引用
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作者 Yifan Wu Zhongyong Zhang +3 位作者 Shangquan Zhao Bin Huang Neng Li Naigen Zhou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期31-37,I0003,共7页
Grain boundaries(GBs),particularlyΣ7 coincidence site lattice(CSL)defects experimentally observed in MXenes,significantly influence their performance as lithium-ion battery(LIB)anodes.This work systematically investi... Grain boundaries(GBs),particularlyΣ7 coincidence site lattice(CSL)defects experimentally observed in MXenes,significantly influence their performance as lithium-ion battery(LIB)anodes.This work systematically investigates the impact ofΣ7 GBs on MXene electrochemical properties,with a focus on rate capability.The results indicated thatΣ7 GB formation is thermodynamically favored in Ti2C,Nb2C,and Mo2C MXenes compared to other M2C compositions,with stability further enhanced by oxygen and sulfur surface functionalization.These GBs induce substantial geometric distortions that reduce surface charge localization while enhancing electrical conductivity in Ti2CO2.The altered electronic structure at GB sites weakens lithium adsorption strength without promoting lithium dendrite formation.Furthermore,diffusion kinetics calculations reveal significantly reduced lithium diffusion barriers atΣ7 GBs in Ti2C,Mo2C,and Mo2CS2compared to pristine materials.Mechanistic analysis attributes this enhancement to diminished charge localization at GB regions,which generates a“charge pool”effect—a zone of uniformly distributed free charge observed in Ti2C and Mo2C.This charge pool not only facilitates ultra-low lithium diffusion barriers(as low as 11 meV in M2C at 0.1 V vs.Li+/Li)but also enhances potential responsiveness of diffusion kinetics.Our findings establish the intentional introduction ofΣ7 GBs as an effective strategy for designing high-rate MXene anodes.This work provides fundamental insights into GB-enhanced electrochemical mechanisms in 2D materials,offering crucial theoretical guidance for the design of high-rate anode materials. 展开更多
关键词 MXenes Coincidence site lattice grain boundaries(CSL-GBs) High-rate anodes Charge pool effect Lithium-ion batteries
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Real-time impedance spectroscopy of lithium-ion batteries via composite current pulses 认领 引用
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作者 Yue Yang Tongfang Fu +4 位作者 Wenbin Li Paul Thiele Chenye Song Simon Mertes Stefan Pischinger 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期902-914,I0021,共13页
Conventional sinusoidal electrochemical impedance spectroscopy is often impractical for real-time control or on-board diagnostics because measurements at low frequencies require long dwell time,resulting in lengthy te... Conventional sinusoidal electrochemical impedance spectroscopy is often impractical for real-time control or on-board diagnostics because measurements at low frequencies require long dwell time,resulting in lengthy test duration.To address this issue,the composite current pulse excitation is implemented in this work for real-time impedance spectrum acquisition,using the discrete Fourier transform.Pulse sequences and sampling conditions are designed to balance bandwidth and accuracy of the impedance results while satisfying hardware constraints and system relaxation requirements.To improve repeatability under noise and dynamic operating conditions,outliers are mitigated by introducing truncated singular value decomposition reconstruction.Two pulse widths(1 and 100 ms)are applied to overcome the bandwidth limitation of a single-width excitation,enabling an accurate spectrum across 1 k Hz to 1 Hz within~1 s.On a commercial 18650 lithium-ion battery,a mean relative impedance deviation of 2.1%compared with galvanostatic electrochemical impedance spectroscopy results is achieved across state of charge from 5%to 90%at 10 and 25℃.Time-domain voltage simulations using pulse-calibrated parameters reproduce the measured dynamic responses,achieving accuracy comparable to simulations parameterized from galvanostatic electrochemical impedance spectroscopy. 展开更多
关键词 Real-time impedance measurement Current pulse Electrochemical impedance spectroscopy Lithium-ion batteries
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Molten Salt Electrolyte Enables Micro-Sized Silicon Anode in Lithium-Ion Batteries 认领 引用
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作者 Wenjian Wang Changyi Zheng +4 位作者 Shengjie Zhang Yao Liu Linjuan Zhang Jianqiang Wang Yonggang Wang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期109-117,共9页
Micro-sized silicon(mSi)anodes offer high capacity for next-generation lithium-ion batteries but suffer from severe volume changes,causing unstable interphases and poor cycling.Traditional electrolytes derive unstable... Micro-sized silicon(mSi)anodes offer high capacity for next-generation lithium-ion batteries but suffer from severe volume changes,causing unstable interphases and poor cycling.Traditional electrolytes derive unstable electrolyte/electrolyte interphases,and flammable solvents pose safety risks.Here,we introduce a non-flammable molten salt electrolyte,which consists of lithium bis(fluorosulfonyl)imide,potassium bis(fluorosulfonyl)amide,and cesium bis(fluorosulfonyl)imide in a mole ratio of 0.3:0.35:0.35(noted as Li0.3K0.35Cs0.35FSA),that forms an inorganic interphase on mSi,stabilizing the electrode/electrolyte interface.Computational and experimental insights elucidate the FSA-anion decomposition-derived SEI predominantly of LiF,Li3N,Li2O,and Li2S,which exhibits mechanical resilience and low interfacial resistance,effectively accommodating the significant volume expansion of silicon during lithiation/delithiation.As a result,the Li||mSi half-cell achieves 60.7%capacity retention after 100 cycles with 99.5%average Coulombic efficiency.Overall,the Li0.3K0.35Cs0.35FSA electrolyte eliminates flammability concerns while enabling robust cycling performance.This work demonstrates a safe,high-energy battery system by coupling mSi anodes with stable molten salt electrolytes,addressing both interfacial instability and safety challenges in mSi-based lithium-ion batteries. 展开更多
关键词 high-energy density interphase engineering lithium-ion batteries microscale/micron silicon molten salt electrolyte
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Electrochemical etching of photovoltaic micron-silicon scrap in molten KCl-LiCl for high-performance lithium-ion battery anodes 认领 引用
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作者 Yagang Yang Hanqing Dong +3 位作者 Kai Yu Qiushi Song Zhiqiang Ning Hongwei Xie 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期445-450,共6页
Photovoltaic micron-silicon scrap(m-Si)has attracted attention as an anode material for lithium-ion batteries due to its high purity and low cost.However,its large particle size hinders the practical application.Herei... Photovoltaic micron-silicon scrap(m-Si)has attracted attention as an anode material for lithium-ion batteries due to its high purity and low cost.However,its large particle size hinders the practical application.Herein,we propose an electrochemical etching process in molten KCl-LiCl to reduce its size.A novel electrode pair was developed by combining m-Si(anode)and spent lithium iron phosphate(LFP,cathode)material from spent lithium-ion batteries(LIBs).The m-Si was reduced from 10μm to<5μm at a cell voltage of 3.0 V by electrochemical etching without chlorine gas and was porous.The obtained e-Si-50 anode exhibits a high specific capacity of 1061.2 mAh/g at 2.0 A/g after 800 cycles in lithium-ion batteries.The Li3PO4,Fe,and carbon are derived by the electrochemical reduction of the LFP,and are efficiently separated via magnetic separation in water without acid/base treatment.This process combines the recycling of photovoltaic micro-silicon scrap and spent LIBs,providing both environmental and economic benefits. 展开更多
关键词 Photovoltaic micro-silicon scrap Lithium-ion batteries anode Molten salt electrochemistry Lithium iron phosphate Recycling
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Fast-charging lithium-ion batteries electrodes enabled by self-regulating micro-channels networks 认领 引用
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作者 Yongtai Xu Zhiwen Zheng +5 位作者 Jianze Feng Xixian Li Kailimai Su Ziqiang Liu Hui Ying Yang Xingbin Yan 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期396-400,共5页
Lithium-ion batteries(LIBs)are essential energy storage devices widely used in portable electronics,transportation,and various other applications.However,current anode materials,with their low intercalation potentials... Lithium-ion batteries(LIBs)are essential energy storage devices widely used in portable electronics,transportation,and various other applications.However,current anode materials,with their low intercalation potentials and poor rate performance,struggle to balance energy density,power density,and safety,particularly under extreme conditions.In this work,we report a self-regulating micro-channel network that forms a three-dimensional(3D)composite electrode architecture without binders and conductive additives,offering a promising anode solution for fast-charging LIBs.Benefiting from the robust 3D architecture with abundant Li+active sites and superior electronic conductivity,the niobium tungsten oxide@carbon nanotube(NWO/CNT)composite electrode demonstrates a high reversible capacity(246.6mAh/g at 0.2 C),excellent rate capability(117.1 mAh/g at 60 C),and long-term durability(73.0%capacity retention after 10,000 cycles).Additionally,a thick electrode with high mass loading(10 mg/cm2)shows remarkable high-rate performance,retaining 51.7%capacity at 20 C.Notably,when paired with LiFePO4(LFP)cathodes,the NWO@CNT//LFP@CNT full batteries exhibit impressive high-power capability(2.8 kW/kg),high energy density(394.2 Wh/kg),and exceptional cycle stability(82%capacity retention after 6000 cycles).Most importantly,this composite electrode architecture also enables the fabrication of a planar,miniaturized,all-solid-state lithium-ion battery with fast-charging capabilities. 展开更多
关键词 Fast-charging lithium-ion batteries Self-regulating nanotube networks High-rate capability Long-term cycling performance Free-standing composite electrode
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Improving the Electrochemical Properties of SiOx/Graphite Anode for High-Performance Lithium-Ion Batteries by Ultrathin Lithium Film Prelithiation 认领 引用
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作者 Wan-Xing Zhang Jia-Jun Wang +12 位作者 Jin-Yang Li Ya-Jun Hou He Huang Qiu-Jiang Dong Wan-Yao Li Hao Guo Hong Zhang Zhao-Yong Sun Qiang Chen Ying Chen Xiao-Peng Han Yi-Da Deng Wen-Bin Hu 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期382-393,共12页
High-capacity SiOx/graphite(SiO/G)anodes offer great potential for advancing lithium-ion battery technology;however,their practical application is limited by low initial coulombic efficiency(ICE)and rapid capacity ... High-capacity SiOx/graphite(SiO/G)anodes offer great potential for advancing lithium-ion battery technology;however,their practical application is limited by low initial coulombic efficiency(ICE)and rapid capacity decay.These challenges primarily arise from unstable phase transitions and the formation of the solid electrolyte interphase(SEI).Prelithiation strategies that aimed at compensating lithium loss have emerged as an effective solution,showing significant advancements in both anode and cathode research.Nevertheless,the interfacial evolution and mechanisms underlying performance enhancement remain unclear.In this work,we demonstrate roll-to-roll contact prelithiation of SiO/G anodes using an ultrathin lithium film,resulting in improved ICE,cycling stability,and rate capability.The contact prelithiation mechanism of silicon-based anodes was investigated via a combination of in situ and ex situ characterizations alongside electrochemical analyses.These studies reveal that the formation of SEI contains multiple lithium silicate phases during the first cycle of prelithiation.This SEI exhibits enhanced conductivity and stability,which contribute to improved cycling performance and rate capability of the prelithiated anode.The prelithiated silicon-carbon composite anode achieved an ICE of 96%in 5.4 Ah pouch cell tests and demonstrated excellent capacity retention of 74%after 500 cycles.This study not only elucidates the critical role of interfacial evolution in SiOx/graphite anodes but also proposes a rational strategy based on phase-phase interface synergistic design for developing durable,highperformance silicon-based anodes suitable for next-generation lithium-ion batteries. 展开更多
关键词 contact prelithiation lithium-ion batteries SiOx/graphite anodes solid electrolyte interphase
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Ultrastable sp2 carbon-conjugated porous organic cage for selective perchlorate capture and fast lithium-ion transport 认领 引用
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作者 Fenglei Qiu Xinting Zhang +4 位作者 Fengquan Liu Linfeng Liang Wenjing Wang Kongzhao Su Daqiang Yuan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2026年第3期64-69,共6页
Organic cage compounds,which are among the most important classes of supramolecular hosts,have been found to be capable of capturing various guests through host-guest interactions due to their inherent cavities.To dat... Organic cage compounds,which are among the most important classes of supramolecular hosts,have been found to be capable of capturing various guests through host-guest interactions due to their inherent cavities.To date,the exploration of potential applications based on such host-guest chemistry has been a subject of intensive research.Herein,we report a highly stable sp2carbon-conjugated porous organic cage(POC),abbreviated as sp2c-POC3,formed via the Knoevenagel reaction between tetraformyl-functionalized calix[4]resorcinarene and V-shaped diacetonitrile subunits.X-ray crystallographic analysis reveals that sp2c-POC3 is a[2+4]long lantern-shaped cage.It contains four rhombic windows with an average edge length of approximately 2.1 nm and a large cavity with a volume of approximately 782Å3.Notably,this cage can selectively capture perchlorate(ClO4-)anions.Taking advantage of such anion trapping ability and the porous nature,a quasi-solid-state electrolyte(QSSE)based on sp2c-POC3 and incorporating LiClO4 has been rationally designed.This sp2c-POC3-based QSSE exhibits a high ionic conductivity of 2.5×10-3S cm-1at room temperature. 展开更多
关键词 Porous organic cage resorcinarene Perchlorate capture Host-guest interaction Lithium-ion transport
Prioritized Lithium Extraction From Spent Lithium-Ion Batteries via Low-Temperature Chlorination Mediated by Seawater-Derived Chlorides 认领 引用
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作者 Bei-Lei Zhang Xiang Chen +5 位作者 Hao Wang Feng-Yin Zhou Xin Qu Jing Li En-Bo Shangguan Hua-Yi Yin 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期395-408,共14页
Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium-ion batteries (LIBs).In this study,a natural roasting agent,seawater-derived chlorid... Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium-ion batteries (LIBs).In this study,a natural roasting agent,seawater-derived chlorides,was employed to selectively extract lithium from spent LiNi0.5Co0.2Mn0.3O2(NCM523) cathode.MgCl2·6H2O,a main component of seawater desalination by-products,was investigated as a roasting agent to explore its chlorination mechanism and optimal roasting conditions.Under optimal roasting conditions (550 ℃,4 h,NCM523/MgCl2·6H2O mass ratio of 1:3,air atmosphere),lithium was selectively converted into soluble LiCl with a leaching efficiency of 98.36%,whereas over 99.99% of the transition metals remained in the form of insoluble metal oxides,achieving the highly selective pre-extraction of lithium.In contrast,the roasting of anhydrous MgCl2 is difficult to achieve the selective conversion of lithium,accompanied by the formation of partial transition metal chlorides.Thermodynamic analysis reveals that the formation of LiCl is thermodynamically more favorable,and the DFT calculation indicates that longer Li-O bonds within the NCM523 structure break more easily,facilitating lithium to escape from the lattice to achieve selective conversion.Unlike the solid-solid reaction of anhydrous MgCl2 with NCM523,the roasting process of MgCl2·6H2O that occurs due to its own thermal hydrolysis is a gas-solid chlorination process,which selectively chlorinates Li in NCM523 using the released HCl and Cl2 gases.Additionally,the chlorides extracted from the seawater as a chlorination agent further confirmed the effectiveness of the recovery process.Economic and environmental assessments demonstrate that this strategy reduces energy consumption and greenhouse gas (GHG) emissions,confirming its sustainability and cost-effectiveness.Overall,this work offers an efficient and economic approach for recovering valuable metals from spent LIB cathode. 展开更多
关键词 chlorination roasting MgCl2⋅6H2O seawater-derived chlorides selectively extracting lithium spent lithium-ion batteries
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Synergizing mimetic Debye-screening effect and robust interphase engineering for long-life low-temperature lithium-ion batteries 认领 引用
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作者 Sai Li Zheng Liu +13 位作者 Xianhui Zhao Rang Xiao Xin Zhang Binghan Cui Huaian Zhao Dongping Chen Daohong Xie Geping Yin Pengjian Zuo Yulin Ma Fangmin Wu Guokang Han Huaizheng Ren Chunyu Du 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期126-135,共10页
The reliable operation of lithium-ion batteries(LIBs)in low temperatures has long been hindered by severe side reactions on graphite anodes.To develop a commercially viable low-temperature electrolyte,we design a solv... The reliable operation of lithium-ion batteries(LIBs)in low temperatures has long been hindered by severe side reactions on graphite anodes.To develop a commercially viable low-temperature electrolyte,we design a solvent-resistant Nitrate-coordinated electrolyte.The practical Ah-level graphite LiNi0.5Co0.2Mn0.3O2 pouch cell with the newly developed electrolyte demonstrates a significant breakthrough in cycling stability,exhibiting negligible capacity fade after 250 cycles at-30℃ and 0.1 C.NO3-,as the functional additive,compresses the electric field around Li+through electrostatic interactions,mimicking the Debye-screening effect and inducing the coordinative exclusion of free ethyl acetate molecules at low temperatures.The transformation from contact ion pairs(CIPs)formed by Pto solventseparated ion pairs is significantly restrained,which mitigates the continuous reactions between the electrolyte and inevitable lithium deposition at low temperature.Additionally,this customized inert CIPs form a solid electrolyte interphase on graphite that exhibits remarkable ionic conductivity and rigidity,preventing excessive Li dendrite growth.This finding offers new insights into the relationship of microstructure-performance for low-temperature electrolytes,demonstrating that relying solely on inert CIPs can also inhibit the decomposition of the interfacial electrolyte,and inspires a unique design concept for high-performance,commercially viable LIBs that operate reliably in sub-zero environments. 展开更多
关键词 LiPF6-based electrolyte Lithium-ion batteries Low-temperature solvation chemistry Inert contact ion pairs Mimetic Debye-screening effect
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