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Scavenging HF and engineering cathode interphase using Diphenylvinylethoxysilane(DPVS)to enhance temperature performance of pouch LiNi0.8Co0.1Mn0.1O2/graphite batteries 认领 引用
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作者 Ruoke Li Xiang Gao +6 位作者 Jiaxin Zhang Peiqi Zhou Yongqi Li Weizhen Fan Xianlu Hou Xiaoyang Zhao Junmin Nan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期48-59,I0003,共12页
Nickel-rich cathodes demonstrate superior energy density in lithium-ion batteries(LIBs),yet their thermal and structural instability remains a critical challenge.Particularly at high temperatures,intensified electroly... Nickel-rich cathodes demonstrate superior energy density in lithium-ion batteries(LIBs),yet their thermal and structural instability remains a critical challenge.Particularly at high temperatures,intensified electrolyte side reactions generate increasing amounts of HF,which corrodes the electrode interphases and degrades battery performance.This work introduces Diphenylvinylethoxysilane(DPVS)additive,containing unsaturated bonds and Si-O bond,as a bifunctional additive to design high-performance electrolytes,thereby enhancing the cycling performance of LiNi0.8Co0.1Mn0.1O2(NCM811)/graphite LIBs at elevated temperatures.At 25℃,after 1200 cycles,the capacity retention of batteries using DPVScontaining electrolyte reached 92%,whereas that of batteries using blank electrolyte was only 77%.At 45℃,DPVS significantly improves the cycling stability,with the cycle numbers to reach 80%capacity retention increasing from 310 to 550.The improvement is attributed to its dual functions;the unsaturated bonds are preferentially oxidized to form a thin and dense interphase through polymerization reactions,while the Si-O bond effectively scavenges HF.Together,they suppress electrolyte decomposition,HF attack on interphases,and structural degradation of NCM811 materials.This work not only develops a functional electrolyte that enhances the long-term cycling performance of NCM811/graphite LIBs but also provides new insights into the design of functional electrolytes. 展开更多
关键词 LiNi0.8Co0.1Mn0.1O2/graphite battery High temperature performance Diphenylvinylethoxysilane Electrolyte additive
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Spatial confinement:An effective strategy to improve H2O and SO2 resistance of the expandable graphite-modified TiO2-supported Pt nanocatalysts for CO oxidation 认领 引用 被引量：2
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作者 Hongtai Zhu Wenge Qiu +2 位作者 RuiWu Kai Li Hong He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第2期57-68,共12页
The expandable graphite(EG)modified TiO2 nanocomposites were prepared by the high shearmethod using the TiO2 nanoparticles(NPs)and EG as precursors,in which the amount of EG doped in TiO2 was 10 wt.%.Followed... The expandable graphite(EG)modified TiO2 nanocomposites were prepared by the high shearmethod using the TiO2 nanoparticles(NPs)and EG as precursors,in which the amount of EG doped in TiO2 was 10 wt.%.Followed by the impregnation method,adjusting the pH of the solution to 10,and using the electrostatic adsorption to achieve spatial confinement,the Pt elementswere mainly distributed on the exposed TiO2,thus generating the Pt/10EG-TiO2-10 catalyst.The best CO oxidation activity with the excellent resistance to H2O and SO2 was obtained over the Pt/10EG-TiO2-10 catalyst:CO conversion after 36 hr of the reaction was ca.85%under the harsh condition of 10 vol.%H2O and 100 ppm SO2 at a high gaseous hourly space velocity(GHSV)of 400,000 hr−1.Physicochemical properties of the catalystswere characterized by various techniques.The results showed that the electrostatic adsorption,which riveted the Pt elements mainly on the exposed TiO2 of the support surface,reduced the dispersion of Pt NPs on EG and achieved the effective dispersion of Pt NPs,hence significantly improving CO oxidation activity over the Pt/10EG-TiO2-10 catalyst.The 10 wt.%EG doped in TiO2 caused the TiO2 support to form a more hydrophobic surface,which reduced the adsorption of H2O and SO2 on the catalyst,greatly inhibited deposition of the TiOSO4 and formation of the PtSO4 species as well as suppressed the oxidation of SO2,thus resulting in an improvement in the resistance to H2O and SO2 of the Pt/10EG-TiO2-10 catalyst. 展开更多
关键词 Expandable graphite Electrostatic adsorption Titania supported platinum CO oxidation Resistance to H2O and SO2
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A scalable approach to Na4Fe3(PO4)2P2O7@carbon/expanded graphite as cathode for ultralong-lifespan and low-temperature sodium-ion batteries 认领 引用 被引量：2
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作者 Zheng Li Fangkun Li +9 位作者 Xijun Xu Jun Zeng Hangyu Zhang Lei Xi Yiwen Wu Linwei Zhao Jiahe Chen Jun Liu Yanping Huo Shaomin Ji 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第10期616-622,共7页
Mixed polyanion phosphate Na4Fe3(PO4)2P2O7(NFPP)is regarded as the most promising cathode material for sodium-ion batteries(SIBs),due to its high structural stability and low-cost environmental frien... Mixed polyanion phosphate Na4Fe3(PO4)2P2O7(NFPP)is regarded as the most promising cathode material for sodium-ion batteries(SIBs),due to its high structural stability and low-cost environmental friendliness.However,its intrinsic low conductivity and sluggish Na+diffusion restricted the fast-charge and low-temperature sodium storage.Herein,an NFPP composite encapsulated by in-situ pyrolytic carbon and coupled with expanded graphite(NFPP@C/EG)was constructed via a sol-gel method followed by a ballmill procedure.Due to the dual-carbon modified strategy,this NFPP@C/EG only enhanced the electronic conductivity,but also endowed more channels for Na+diffusion.As cathode for SIBs,the optimized NFPP(M-NFPP@C/EG)delivers excellent rate capability(capacity of~80.5 mAh/g at 50 C)and outstanding cycling stability(11000 cycles at 50 C with capacity retention of 89.85%).Additionally,cyclic voltammetry(CV)confirmed that its sodium storage behavior is pseudocapacitance-controlled,with in-situ electrochemical impedance spectroscopy(EIS)further elucidating improvements in electrode reaction kinetics.At lower temperatures(0℃),M-NFPP@C/EG demonstrated exceptional cycling performance(8800 cycles at 10 C with capacity retention of 95.81%).Moreover,pouch cells also exhibited excellent stability.This research demonstrates the feasibility of a dual carbon modification strategy in enhancing NFPP and proposes a low-cost,high-rate,and ultra-stable cathode material for SIBs. 展开更多
关键词 Na4Fe3(PO4)2P2O7 Expanded graphite Dual-carbon modified Polyanionic compounds cathode Sodium-ion batteries
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Constructing graphite-CeO2interfaces to enhance the photothermal activity for solar-driven dry reforming of methane 认领 引用
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作者 LI Ruitao GONG Kun +3 位作者 DAI Yuanyuan NIU Qiang LIN Tiejun ZHONG Liangshu 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第8期1137-1147,共11页
CeO2 based semiconductor are widely used in solar-driven photothermal catalytic dry reforming of methane(DRM)reaction,but still suffer from low activity and low light utilization efficiency.This study developed gra... CeO2 based semiconductor are widely used in solar-driven photothermal catalytic dry reforming of methane(DRM)reaction,but still suffer from low activity and low light utilization efficiency.This study developed graphite-CeO2 interfaces to enhance solar-driven photothermal catalytic DRM.Compared with carbon nanotubes-modified CeO2(CeO2-CNT),graphite-modified CeO2(CeO2-GRA)constructed graphite-CeO2 interfaces with distortion in CeO2,leading to the formation abundant oxygen vacancies.These graphite-CeO2 interfaces with oxygen vacancies enhanced optical absorption and promoted the generation and separation of photogenerated carriers.The high endothermic capacity of graphite elevated the catalyst surface temperature from 592.1−691.3℃,boosting light-to-thermal conversion.The synergy between photogenerated carriers and localized heat enabled Ni/CeO2-GRA to achieve a CO production rate of 9985.6 mmol/(g·h)(vs 7192.4 mmol/(g·h)for Ni/CeO2)and a light-to-fuel efficiency of 21.8%(vs 13.8%for Ni/CeO2).This work provides insights for designing graphite-semiconductor interfaces to advance photothermal catalytic efficiency. 展开更多
关键词 dry reforming of methane photothermal catalysis CeO2 graphite interfaces
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Low-temperature synthesis of graphite with fast ion storage kinetics from greenhouse gas for electrochemical energy storage 认领 引用 被引量：1
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作者 Zixu Zhao Peng Li +5 位作者 Xiaohua Zheng Liangshun Xiang Xiaoyu Zhang Mervat Ibrahim Shuangxi Fang Chu Liang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1585-1595,I0141-I0148,共11页
Conventional graphite synthesis involves CO2emission and a graphitization process at a high temperature of~3000℃.Herein,we report a new method to synthesize high-performance graphite anode materials from greenhous... Conventional graphite synthesis involves CO2emission and a graphitization process at a high temperature of~3000℃.Herein,we report a new method to synthesize high-performance graphite anode materials from greenhouse CO2gas at an external heating temperature as low as 135℃.Transition metal catalysts are not required for low-temperature synthesis of graphite.Extreme graphitization temperatures are not required as compared to graphite synthesized from petroleum coke-based materials.The graphitization degree of graphite was found to be strongly related to CO2pressure.Graphite was synthesized at a maximum pressure of 20 MPa,whereas semi-graphited carbon was synthesized at a maximum pressure of 6.3 MPa.The synthesized graphite exhibited superior lithium storage kinetics and excellent cycling stability over 3000 cycles,with a capacity retention of~100% at 1.0 A·g-1.This work establishes an integrated sustainable strategy that concurrently addresses greenhouse gas utilization and energy-efficient anode material production. 展开更多
关键词 CO2conversion low-temperature synthesis graphite catalyst-free lithium/potassium storage
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Enhancing energy density in planar micro-supercapacitors:The role of few-layer graphite/carbon black/NiCo2O4 composite materials 认领 引用
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作者 ZHANG Wanggang HUANG Lei +3 位作者 WANG Menghu WANG Jian WEI Aili LIU Yiming 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第5期646-662,共17页
The advancement of planar micro-supercapacitors(PMSCs)for micro-electromechanical systems(MEMS)has been significantly hindered by the challenge of achieving high energy and power densities.This study addresses this is... The advancement of planar micro-supercapacitors(PMSCs)for micro-electromechanical systems(MEMS)has been significantly hindered by the challenge of achieving high energy and power densities.This study addresses this issue by leveraging screen-printing technology to fabricate high-performance PMSCs using innovative composite ink.The ink,a synergistic blend of few-layer graphene(Gt),carbon black(CB),and NiCo2O4,was meticulously mixed to form a conductive and robust coating that enhanced the capacitive performance of the PMSCs.The optimized ink formulation and printing process result in a micro-supercapacitor with an exceptional areal capacitance of 18.95 mF/cm2and an areal energy density of 2.63μW·h/cm2at a current density of 0.05 mA/cm2,along with an areal power density of 0.025 mW/cm2.The devices demonstrated impressive durability with a capacitance retention rate of 94.7%after a stringent 20000-cycle test,demonstrating their potential for long-term applications.Moreover,the PMSCs displayed excellent mechanical flexibility,with a capacitance decrease of only 3.43%after 5000 bending cycles,highlighting their suitability for flexible electronic devices.The ease of integrating these PMSCs into series and parallel configurations for customized power further underscores their practicality for integrated power supply solutions in various technologies. 展开更多
关键词 graphite/carbon black composite NiCo2O4 screen printing planar micro-supercapacitor energy density mechanical flexibility
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Elevated temperature resilience of pouch LiNi0.8Co0.1Mn0.1O2/graphite batteries through siloxane-induced cathode electrolyte interphase optimization 认领 引用
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作者 Xiang Gao Peiqi Zhou +6 位作者 Haijia Li Xueyi Zeng Xin He Weizhen Fan Wenlian Wang Zhen Ma Junmin Nan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期202-213,共12页
As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(etheny... As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(ethenyl)silyloxysilane (HVDS) with Si–O bonds and unsaturated bonds is introduced as additive designing functional electrolyte to enhance the long-cycle stability of LiNi0.8Co0.1Mn0.1O2(NCM811)/graphite LIBs at elevated temperature.The preferential oxidization and component of HVDS facilitate the generation of an extremely robust and ultra-thin cathode electrolyte interphase (CEI) comprising a chemically bonded silane polymer.This interphase effectively suppresses side-reactions of electrolyte,mitigates HF erosion,and reduces irreversible phase transitions.Benefiting from the above merits,the batteries’capacity retention shows a remarkable increase from 20% to 92% after nearly 1550 cycles conducted at room temperature.And under elevated temperature conditions (45℃),the capacity retention remains 80%after 670 cycles,in comparison to a drop to 80%after only 250 cycles with the blank electrolyte.These findings highlight HVDS’s potential to functionalize the electrolyte,marking a breakthrough in improving the longevity and reliability of NCM811/graphite LIBs under challenging conditions. 展开更多
关键词 High temperature performance Tris(ethenyl)-tris(ethenyl)silyloxysilane additive LiNi0.8Co0.1Mn0.1O2/graphite battery Cathode electrolyte interphase
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Nanosized SnO_2 Particles Dispersed on a Graphite Electrode for Selective Detection of Dopamine and Ascorbic Acid 认领 引用 被引量：2
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作者 JunLIU ZhongHuaWANG 《Chinese Chemical Letters》 SCIE CAS 2002年第8期765-768,共4页
A novel nano-SnO2/graphite electrode has been prepared via polishing procedure to produce active and stable surface. The modified electrode resolves the overlapping voltammetric response of dopamine and ascorbic acid ... A novel nano-SnO2/graphite electrode has been prepared via polishing procedure to produce active and stable surface. The modified electrode resolves the overlapping voltammetric response of dopamine and ascorbic acid into two well-defined peaks by 230 mV. The mechanism of discrimination of dopamine from ascorbic acid is discussed. Dopamine and ascorbic acid can be determined simultaneously with the modified electrode. The electrode shows good sensitivity, selectivity and stability. 展开更多
关键词 Nano-SnO2/graphite electrode dopamine ascorbic Acid.
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Tribological behavior and mechanisms of graphite/CaF_2/TiC/Ni-base alloy composite coatings 认领 引用 被引量：7
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作者 蔡滨 谭业发 +2 位作者 何龙 谭华 王小龙 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期392-399,共8页
In order to reduce the friction coefficients and improve the wear resistance of mechanical parts, which work in the severe friction and wear conditions at heavy loads, the graphite/CaFg/TiC/Ni-base alloy composite coa... In order to reduce the friction coefficients and improve the wear resistance of mechanical parts, which work in the severe friction and wear conditions at heavy loads, the graphite/CaFg/TiC/Ni-base alloy composite coatings were prepared by plasma spray and their tribological behavior and mechanisms were investigated. The results show that the friction coefficients of the composite coatings are in the range of 0.22-0.288, which are reduced by 25.9% to 53% compared with those of the pure Ni-base alloy coatings, and the wear rates of the former are 18.6%-70.1% less than those of the latter. When wear against GCr15 steel balls, a transferred layer mainly composed of ferric oxides, graphite and CaF2 may gradually develop on the worn surface of the composite coatings, which made the friction and wear between GCr15 steel ball and the composite coatings change into that between the former and the transferred layer. So the friction coefficients and the wear lubrication effect of the transferred layer. The main wear layer in friction process. rates of the composite coatings are greatly reduced because of the solid mechanism of the composite coatings is delamination of the transferred 展开更多
关键词 plasma spray composite coatings Ni-base alloy graphite TiC CaF2 tribology
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Effect of WS_2 addition on electrical sliding wear behaviors of Cu-graphite-WS_2 composites 认领 引用 被引量：8
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作者 钱刚 凤仪 +3 位作者 陈阳明 莫飞 王雨晴 刘文宏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第6期1986-1994,共9页
Four kinds of Cu-based composites with different mass ratios of graphite and WS2 as lubricants were fabricated by hot-pressing method. Electrical sliding wear behaviors of the composites were investigated using a bloc... Four kinds of Cu-based composites with different mass ratios of graphite and WS2 as lubricants were fabricated by hot-pressing method. Electrical sliding wear behaviors of the composites were investigated using a block-on-ring tribometer rubbing against Cu-5%Ag alloy ring. The results demonstrated that 800 ~C was the optimum sintering temperature for Cu-graphite-WS2 dual-lubricant composites to obtain the best comprehensive properties of mechanical strength and lubrication performance. Contact voltage drops of the Cu-based composites increased with increasing the mass ratio of WS2 to graphite. The Cu-based composite with 20% graphite and 10% WS2 showed the best wear resistance due to the excellent synergetic lubricating effect of graphite and WS2. The reasonable addition of WS2 into the Cu-graphite composite can remarkably improve the wear resistance without much rise of electrical energy loss which provides a novel principle of designing suitable sliding electrical contact materials for industrial applications. 展开更多
关键词 Cu-based composites graphite WS2 synergetie lubrication wear rate contact voltage drop
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Formation of NiFe_2O_4/Expanded Graphite Nanocomposites with Superior Lithium Storage Properties 认领 引用 被引量：11
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作者 Yinglin Xiao Jiantao Zai +1 位作者 Bingbing Tian Xuefeng Qian 《Nano-Micro Letters》 SCIE EI CAS 2017年第3期101-108,共8页
A Ni Fe_2O_4/expanded graphite(Ni Fe_2O_4/EG)nanocomposite was prepared via a simple and inexpensive synthesis method. Its lithium storage properties were studied with the goal of applying it as an anode in a lithium-... A Ni Fe_2O_4/expanded graphite(Ni Fe_2O_4/EG)nanocomposite was prepared via a simple and inexpensive synthesis method. Its lithium storage properties were studied with the goal of applying it as an anode in a lithium-ion battery. The obtained nanocomposite exhibited a good cycle performance, with a capacity of 601 m Ah g-1at a current of 1 A g-1after 800 cycles. This good performance may beattributed to the enhanced electrical conductivity and layered structure of the EG. Its high mechanical strength could postpone the disintegration of the nanocomposite structure,efficiently accommodate volume changes in the Ni Fe_2O_4-based anodes, and alleviate aggregation of Ni Fe_2O_4 nanoparticles. 展开更多
关键词 NiFe2O4 Expanded graphite Anode materials Lithium-ion batteries
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Laser Alloyed Coatings of TiB_2/Graphite on 9Cr18 Stainless Steel Surface 认领 引用 被引量：6
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作者 YING Li-xia WANG Li-qin +1 位作者 JIA Xiao-mei GU Le 《Journal of Iron and Steel Research International》 SCIE CAS 2007年第3期69-72,共4页
Modified coatings including carbide of iron, nickel, chromium, silicon, and titanium are obtained on 9Cr18 stainless steel surface by laser alloying. The processing method, the microstructure, the interface, the tribo... Modified coatings including carbide of iron, nickel, chromium, silicon, and titanium are obtained on 9Cr18 stainless steel surface by laser alloying. The processing method, the microstructure, the interface, the tribological properties, and the forming mechanisms of the coatings are analyzed. The results show that the microstructure of the alloyed coatings is mainly irregular FeC crystals. Carbides of chromium and iron are around the FeC crystals. Small granular TiC disperses in the alloyed coatings. The microhardness of the alloyed coatings is greatly improved because of the occurrence of carbide with high hardness. At the same time, the wear resistance of the alloyed coatings are higher than that of 9Cr18 stainless steel. 展开更多
关键词 laser alloying TiB2 graphite carbide
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Influence of adding carbon nanotubes and graphite to Ag-MoS_2 composites on the electrical sliding wear properties 认领 引用 被引量：5
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作者 Shu LI Yi FENG Xiting YANG 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS 2010年第1期27-34,共8页
Silver matrix composite brushes were fabricated by means of powder metallurgy,which included pressing at 300 MPa and then sintering for 1 h in pure H2 protective atmosphere at 700℃and repressing at 500 MPa.Four kinds... Silver matrix composite brushes were fabricated by means of powder metallurgy,which included pressing at 300 MPa and then sintering for 1 h in pure H2 protective atmosphere at 700℃and repressing at 500 MPa.Four kinds composites with different compositions were produced,and the mechanical properties and electrical wear performance were investigated.The results showed that the composite added with carbon nanotubes had a higher hardness and strength,a lower contact voltage drop and an excellent anti-wear property in electrical sliding wear,because of the reinforcement ability of carbon nanotubes.Adding graphite to the composite also decreased the wear loss and contact voltage drop,because graphite had an electrical current conducting ability which not only made the current pass the lubricating films easily but also eliminated and reduced the arc and spark effectively. 展开更多
关键词 Ag-MoS2 composite Carbon nanotube Graphite Contact voltage drop Friction coefficient Wear loss
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Pressure-mediated contact quality improvement between monolayer MoS2 and graphite 认领 引用 被引量：2
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作者 Mengzhou Liao Luojun Du +5 位作者 Tingting Zhang Lin Gu Yugui Yao Rong Yang Dongxia Shi Guangyu Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第1期178-182,共5页
Two-dimensional(2D) materials and their heterostructures have attracted a lot of attention due to their unique electronic and optical properties. MoS2 as the most typical 2D semiconductors has great application pot... Two-dimensional(2D) materials and their heterostructures have attracted a lot of attention due to their unique electronic and optical properties. MoS2 as the most typical 2D semiconductors has great application potential in thin film transistors, photodetector, hydrogen evolution reaction, memory device, etc. However, the performance of MoS2 devices is limited by the contact resistance and the improvement of its contact quality is important. In this work, we report the experimental investigation of pressure-enhanced contact quality between monolayer MoS2 and graphite by conductive atom force microscope(C-AFM). It was found that at high pressure, the contact quality between graphite and MoS2 is significantly improved. This pressure-mediated contact quality improvement between MoS2 and graphite comes from the enhanced charge transfer between MoS2 and graphite when MoS2 is stretched. Our results provide a new way to enhance the contact quality between MoS2 and graphite for further applications. 展开更多
关键词 MoS2/graphite heterojunction C-AFM pressure contact quality
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Absorption and Photocataly tic Degradation of Machine Oil by Exfoliated Graphite-Supported Nanometer TiO2 Material 认领 引用 被引量：2
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作者 CAO Hong MA Enbao +2 位作者 WANG Xuehua CHEN Jiazang BIN Xiaobei 《Acta Geologica Sinica(English Edition)》 SCIE CAS 2006年第2期285-289,共5页
By loading nanometer anatase onto exfoliated graphite with the sol-gel method, exfoliated graphite-TiO2 composite （EG-TiO2） can be prepared, which can adsorb oil and can also degrade oil. In a technologic condition ... By loading nanometer anatase onto exfoliated graphite with the sol-gel method, exfoliated graphite-TiO2 composite （EG-TiO2） can be prepared, which can adsorb oil and can also degrade oil. In a technologic condition for preparing EG-TiO2, the impregnated number of times is the most important factor to influence oil-adsorbing capability, that is, when the impregnated number of times increases, the amount of saturation-adsorbed oil decreases. The study of EG-TiO2 photocatalytic degradation of machine oil based on the weight-loss method and infrared spectrum method indicates that EG-TiO2 has obvious effect of photocatalytic degradation for machine oil. Its performance is superior to pure nanometer TiO2 powder because nanometer TiO2 in EG-TiO2 has three-dimension laminar structure and comparatively high adsorption capability. 展开更多
关键词 exfoliated graphite nanometer TiO2 photocatalysis degradation machine oil
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Facile synthesis of MoS_2/graphite intercalated composite with enhanced electrochemical performance for sodium ion battery 认领 引用 被引量：3
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作者 Qingqing Yang Maocheng Liu +3 位作者 Yumei Hu Yan Xu Lingbin Kong Long Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第4期1208-1213,共6页
MoS2 is a promising anode material for sodium ion batteries owing to its two-dimensional layered structure and high specific capacity. But it still exhibits a poor cycle stability and limited rate capability for Na＋ ... MoS2 is a promising anode material for sodium ion batteries owing to its two-dimensional layered structure and high specific capacity. But it still exhibits a poor cycle stability and limited rate capability for Na＋ storage because of its poor electrical conductivity and structural instability. In this work, MoS2/graphite composite is fabricated by mechanically delaminated and restacked MoS2 and graphite to form two-dimensional composite layers. The graphite sheets will improve electrical conductivity and prevent the aggregation as well as structure collapse of the MoS2 layers during charge-discharge process. The MoS2/graphite composite exhibits excellent Na＋ storage properties. It delivers a high discharge specific capacity of 358.2 mAh/g at a current density of 100 mA]g in the first discharge process and with capacity retention of 68.1% after 800 cycles （retains 244 mAh/g）. The average discharge specific capacities retain 250.9 and 225.4 mAh/g corresponding to the current densities of 100 and 1000 mA]g, showing excellent rate capability. The improved electrochemical performance is attributed to the improved electrical conductivity and structural stability after composition of graphite sheets. The study demonstrates a new research strategy for improving sodium ion storage properties of Mo52. 展开更多
关键词 Sodium ion batteries Transition metal disulfides MoS2/graphite Anode materials
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Investigation on MoS_2 and Graphite Coatings and Their Effects on the Tribological Properties of the Radial Spherical Plain Bearings 认领 引用 被引量：15
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作者 QIU Ming LU Jianjun +1 位作者 LI Yingchun LV Guisen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第4期844-852,共9页
With constant enlargement of the application areas of the spherical plain bearings,higher quality lubrication of the bearings is required.To solve the lubricating problems of spherical plain bearings under high temper... With constant enlargement of the application areas of the spherical plain bearings,higher quality lubrication of the bearings is required.To solve the lubricating problems of spherical plain bearings under high temperature,high vacuum,high speed,heavy loads and strong oxidation conditions,it is urgent for us to develop more excellent self-lubricating technologies.In this paper,the bonded solid lubricant coatings,which use inorganic phosphate as the binder,the mixture of MoS2 and graphite with two different weight proportions as the solid lubricant,are prepared by spraying under three different spray gun pressures.The bonding strength tests on the coatings show that the best spraying pressure is 0.2 MPa and the better mixing proportion of MoS2 to Graphite is 3：1.Then for the radial spherical plain bearings with steel/steel friction pair,after the coatings are made on the inner ring outer surfaces,the friction coefficient,the wear loss and the friction temperature of the bearings under four oscillating frequencies are investigated by a self-made tribo-tester.The test results,SEM of the worn morphologies and EDS of worn areas show that tribological properties of the bearing are obviously improved by the bonded solid lubricant coatings.When sprayed under the spray gun pressure of 0.2 MPa,the bearings have better anti-friction and anti-wear properties than those sprayed under 0.1 MPa and 0.3 MPa.Further as proved from the XPS analysis,between the coating with 3：1 mixing ratio of MoS2 to Graphite and the coating with 1：1 ratio,the former has less oxidation occurred on the surface and therefore has better tribological characteristics than the latter.This paper provides a reference to developing a new product of the radial spherical plain bearings with high bonding strength,oxidation resistance and abrasion resistance. 展开更多
关键词 MoS2 and graphite coating spray gun pressure spherical plain bearing friction wear
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Microstructure and performance of laser cladding TiB_2 and Nickel-coated graphite composite coating on stainless steel 9Cr18 认领 引用 被引量：1
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作者 应丽霞 王黎钦 +2 位作者 郑德志 贾晓梅 齐毓霖 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第3期307-310,共4页
The antiwear and antifriction coating, which contains TiB2 and Nickel-coated graphite, has been obtained on stainless steel 9Cr18 by laser cladding. The processing method, microstructure, interface, microhardness, tri... The antiwear and antifriction coating, which contains TiB2 and Nickel-coated graphite, has been obtained on stainless steel 9Cr18 by laser cladding. The processing method, microstructure, interface, microhardness, tribological properties and the forming mechanisms of the coating are analyzed. Results show that the microstructure of the clad coating are mainly long plume-like primary phase sosoloid Ni-Fe which form the matrix framework, while the in-situ anomalous synthetical TiC grains and uhrafine TiB2 grains uniformly disperse among the framework. The hardness and wear resistance of the coating has been greatly improved, which can be attributed to the reinforcement mechanism of TiC, TiB2, FeC, Fe3C and Cr23 C6. etc. At the same time, the coating has friction-reducing ability. 展开更多
关键词 laser cladding TiB2 Nickel-coated graphite microstructure
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不同TiB2含量下多元混杂铜基复合材料的摩擦磨损性能 认领 引用
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作者 韦江 李恒青 刘洋赈 《铸造》 CAS 2026年第4期330-335,共6页
为明确TiB2对混杂Cu基复合材料损伤机制的影响,采用快速真空热压烧结方法制备了石墨-TiB2混杂增强Cu基复合材料,研究了不同TiB2含量(0.5%、1.0%、1.5%和3.0%,质量分数)对复合材料摩擦因数、磨损率及磨损表面形貌等的影响。结... 为明确TiB2对混杂Cu基复合材料损伤机制的影响,采用快速真空热压烧结方法制备了石墨-TiB2混杂增强Cu基复合材料,研究了不同TiB2含量(0.5%、1.0%、1.5%和3.0%,质量分数)对复合材料摩擦因数、磨损率及磨损表面形貌等的影响。结果表明,随着TiB2含量的增加,复合材料的摩擦因数和磨损率均先降低后上升,TiB2含量为1.0%时复合材料的耐磨性较优,其磨损机制以磨粒磨损为主,伴随有黏着磨损和氧化磨损;混杂Cu基复合材料磨损表面由石墨、CuO、Fe3O4与Fe3O3构成。 展开更多
关键词 Cu基复合材料 TiB2 石墨 磨损形貌 磨损机制
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碱热处理SnO2/g-C3N4催化还原CO2的影响机制研究 认领 引用
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作者 苏明雪 顾春晗 +1 位作者 张涵 李宁 《环境工程》 CAS CSCD 2026年第2期150-157,共8页
电催化还原CO2是我国实现“双碳”战略的重要途经。石墨相氮化碳(g-C3N4)由于其原料来源广泛、制备工艺简单、成本低廉,在电催化领域被广泛用于催化剂或载体。针对g-C3N4作为CO2电还原(eCO2RR)催化剂载体,存在比... 电催化还原CO2是我国实现“双碳”战略的重要途经。石墨相氮化碳(g-C3N4)由于其原料来源广泛、制备工艺简单、成本低廉,在电催化领域被广泛用于催化剂或载体。针对g-C3N4作为CO2电还原(eCO2RR)催化剂载体,存在比表面积小、碱性弱以及实际烟气中低浓度CO2和O2竞争还原的瓶颈,研究提出通过碱热处理改性SnO2/g-C3N4复合催化剂的技术路线。XPS和CO2-TPD等表征结果表明:碱热处理显著提升了g-C3N4载体的表面氨基含量(由3.7%增至7.0%),增强了催化剂整体碱性及CO2吸附能力(由7.69 mmol/g增至48.80 mmol/g)。碱热处理诱导电子从g-C3N4中的N元素向Sn活性位点加速转移,形成富电子态Sn中心,并产生更多氧空位,协同促进了CO2的活化与还原。竞争吸附实验表明,改性后的SnO2/CNOHHT在CO2/O2混合气中对CO2具有更高的选择性吸附(分离系数0.90),有利于在反应界面形成CO2富集微环境,抑制O2还原竞争反应。电催化性能测试显示,在纯CO2气氛下,SnO2/CNOHHT电催化还原制甲酸的法拉第效率高达80.5%(电流密度23.5 mA/cm2);在含4%O2的模拟烟气氛围下,其甲酸法拉第效率仍可达59.4%,显著优于未改性及碱处理的催化剂。研究为开发适用于实际含氧烟气CO2高效电还原的g-C3N4基催化剂提供了新思路。 展开更多
关键词 CO2电还原 氧化锡 石墨相氮化碳 烟气 传质强化
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