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Improvement of stability of trivalent chromium electroplating of Ti based IrO_2+Ta_2O_5 coating anodes 认领 引用 被引量：3
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作者 LI Baosong LIN An GAN Fuxing 《Rare Metals》 SCIE EI CAS 2006年第Z1期645-649,共5页
The preparation process and properties of the thermally prepared Ti anodes coated with IrO2+Ta2O5 was studied. The structure and morphologies of the IrO2+Ta2O5 coatings were determined by XRD and SEM. Their electroche... The preparation process and properties of the thermally prepared Ti anodes coated with IrO2+Ta2O5 was studied. The structure and morphologies of the IrO2+Ta2O5 coatings were determined by XRD and SEM. Their electrochemical properties were studied by polarization curve and cyclic voltammetry. Trivalent chromium electroplating using Ti/IrO2+Ta2O5 anodes is carried out and the results were analyzed. Results show that this anode exhibits excellent electrochemical activity and stability in sulfate electrolysis. The electrocatalytic activity is determined not only by the content of IrO2 but also the structure and morphology of the anode coatings. The electroplating results indicats that Ti/IrO2+Ta2O5 anodes have excellent capabilities and merits in improving the stability of trivalent chromium electroplating in sulfate system. 展开更多
关键词 IrO2+Ta2O5 trivalent chromium electroplating oxygen evolution oxide coated anode
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中性盐雾腐蚀对螺栓用MoS2涂层摩擦学性能的影响 认领 引用
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作者 张钦莹 殷小健 +5 位作者 高学敏 马建华 冯德荣 王亚妹 明全元 万强 《材料保护》 CAS CSCD 2026年第1期84-94,共11页
MoS2,涂覆与阳极氧化复合处理被广泛应用于螺栓等紧固件表面润滑,但尚未探究其在滨海地区腐蚀与高湿条件下的润滑性能演变规律。对MoS2涂层涂覆垫片和螺栓分别进行了3500h中性盐雾腐蚀,并测定腐蚀后垫片往复摩擦系数与螺栓扭矩系... MoS2,涂覆与阳极氧化复合处理被广泛应用于螺栓等紧固件表面润滑,但尚未探究其在滨海地区腐蚀与高湿条件下的润滑性能演变规律。对MoS2涂层涂覆垫片和螺栓分别进行了3500h中性盐雾腐蚀,并测定腐蚀后垫片往复摩擦系数与螺栓扭矩系数,建立摩擦系数演变规律。结合摩擦形貌观察,揭示螺栓摩擦系数与扭矩系数变化内因,提出涂层盐雾腐蚀后摩擦磨损机制。结果表明,随腐蚀时间从0h增加到3500h,表面涂覆MoS2涂层垫片在往复试验中平均摩擦系数变化较小,而阳极氧化加MoS2涂覆复合处理的样品摩擦系数腐蚀后显著下降;分析发现盐雾腐蚀会导致MoS2涂层氧化,形成硬质氧化物颗粒,导致犁削与磨粒磨损现象,使得涂层片状剥落,摩擦副与下层基体或氧化层接触,造成摩擦曲线变化;而表面阳极氧化处理能有效嵌藏氧化物颗粒,增强涂层稳定性。此外,盐雾腐蚀氧化也会引起螺纹、支撑面摩擦系数增加,从而导致总摩擦系数与扭矩系数升高。阳极氧化加MoS2涂覆复合处理螺栓在盐雾腐蚀环境下具有更好的低摩擦稳定性和服役可靠性,为滨海地区螺栓类紧固件的表面处理工艺优化及长效润滑防护提供了关键实验依据与理论支撑。 展开更多
关键词 MoS2涂层 脉冲阳极氧化 盐雾腐蚀 往复摩擦 螺栓摩擦
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IrO_2-MnO_2中间层Ti/RuO_2-TiO_2-SnO_2电极制备及性能 认领 引用 被引量：7
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作者 刘晓军 刘贵昌 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2012年第1期54-57,共4页
通过热分解法制备了含IrO2-MnO2中间层Ti/RuO2-TiO2-SnO2电极,采用SEM、EDX、XRD、CV等检测方法对中间层进行表征,同时采用强化加速寿命试验对电极电化学稳定性进行表征。结果表明:450℃时前躯体完全氧化并形成固溶体,制备的中间层晶粒... 通过热分解法制备了含IrO2-MnO2中间层Ti/RuO2-TiO2-SnO2电极,采用SEM、EDX、XRD、CV等检测方法对中间层进行表征,同时采用强化加速寿命试验对电极电化学稳定性进行表征。结果表明:450℃时前躯体完全氧化并形成固溶体,制备的中间层晶粒细小,表面结构致密,电化学孔隙率小。添加中间层使Ti/RuO2-TiO2-SnO2电极强化寿命由未加中间层的7.5h提高到995.8h,远高于国家标准20h。 展开更多
关键词 Ti/RuO2-TiO2-SnO2电极 IrO2-MnO2中间层 电化学稳定性
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CoSe2/FeSe2@NC异质结构复合材料的制备及其储钠性能研究 认领 引用
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作者 黄祎霞 陈文瑄 +1 位作者 陈艺丹 林志雅 《化工设计通讯》 CAS 2026年第6期1-4,共4页
双金属硒化物作为钠离子电池负极材料具有高理论容量和良好的电化学可逆性,但因本征电子导电性较差和循环过程中体积膨胀较严重而限制了其进一步实际应用。通过气相硒化制备了氮掺杂碳包覆CoSe2/FeSe2(CoSe2/FeSe2@NC)异质结... 双金属硒化物作为钠离子电池负极材料具有高理论容量和良好的电化学可逆性,但因本征电子导电性较差和循环过程中体积膨胀较严重而限制了其进一步实际应用。通过气相硒化制备了氮掺杂碳包覆CoSe2/FeSe2(CoSe2/FeSe2@NC)异质结构复合材料。其中,蛋黄-壳结构和双金属硒化物的协同效应减轻了体积效应,促进了Na+扩散与电子传输,使得CoSe2/FeSe2@NC具有优异的储钠性能。电化学测试结果显示,材料在5 A·g-1下循环600次后放电容量仍可保持292.5 mAh·g-1,表现出了良好的循环性能。在5 A·g-1下的倍率测试中容量达到341.1 mAh·g-1,表现出优异的倍率性能。 展开更多
关键词 CoSe2/FeSe2@NC 钠离子电池 负极材料 氮掺杂碳包覆
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PPy-Encapsulated Na2Li2Ti6O14 Composites as High-Performance Anodes for Li-Ion Battery 认领 引用 被引量：1
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作者 Fan-Fan Wang Nan Zhang +3 位作者 Ze-Chen Lv Yan-Rong Zhu Jun-Hong Zhang Ting-Feng Yi 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2022年第11期1873-1881,共9页
Na2Li2Ti6O14 as a reliable anode material is becoming a hopeful candidate for Li-ion battery.Nevertheless,the pristine Na2Li2Ti6O14 usually suffer from bad rate performance and poor cycling sta... Na2Li2Ti6O14 as a reliable anode material is becoming a hopeful candidate for Li-ion battery.Nevertheless,the pristine Na2Li2Ti6O14 usually suffer from bad rate performance and poor cycling stability under high current due to limited diffusion kinetics and poor electrical conductivity.Here,the PPy-coated Na2Li2Ti6O14 composites are successfully obtained via the solid-state method and followed by chemical oxidation process in the first time.The results of tests prove that the Na2Li2Ti6O14@PPy composites have better electrochemical performance than the bare Na2Li2Ti6O14 because of the excellent electrical conductivity and the special macromolecular architecture of PPy.In particular,the Na2 Li2 Ti6 O14 @PPy(4 wt%)exhibits excellent charge capacities of about 223.2,218.0,200.8,184.3 and 172.6 mAh g-1 at 50,100,200,300 and500 mA g-1,respectively,revealing the best rate capability of all electrode materials.The Na2Li2Ti6O14@PPy(4 wt%)not only has the highest charge capacity under 0.5 mA g-1,but also has the highest capacity retention of 85.12%among all samples after 100 loops.Hence,the PPy coating is known as a promising way to improve the electrochemical property of Na2Li2Ti6O14.The PPy-coated Na2Li2Ti6O14 demonstrates the great prospect as promising negative materials for Li-ion batteries. 展开更多
关键词 Li-ion battery Anode material Na2Li2Ti6O14 PPy coating Electrochemical property
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刻蚀剂对IrO_2-MnO_2阳极纳米涂层表面形貌及电化学行为的影响 认领 引用
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作者 叶志国 范庆国 +1 位作者 孟惠民 卢春民 《电化学》 CSCD 北大核心 2015年第1期91-96,共6页
采用传统热分解法制得了不同刻蚀剂(HCl、H2SO4、C2H2O4和HF)处理的Ti基Ir O2-Mn O2纳米涂层阳极,使用场发射扫描电子显微镜(FESEM)、循环伏安(CV)及极化技术等观察和研究各纳米涂层阳极表面形貌及其电化学性能.结果表明,与HCl和C2H2O4... 采用传统热分解法制得了不同刻蚀剂(HCl、H2SO4、C2H2O4和HF)处理的Ti基Ir O2-Mn O2纳米涂层阳极,使用场发射扫描电子显微镜(FESEM)、循环伏安(CV)及极化技术等观察和研究各纳米涂层阳极表面形貌及其电化学性能.结果表明,与HCl和C2H2O4刻蚀剂相比,HF和H2SO4刻蚀的基底涂层表面Ir O2纳米颗粒更为密集且尺寸更大;H2SO4刻蚀处理的Ti基Ir O2-Mn O2阳极电催化活性最佳,HF次之,C2H2O4再次之,HCl最差. 展开更多
关键词 刻蚀剂 IrO2-MnO2阳极涂层 热分解 循环伏安电荷 电流密度
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MnO2 nanosheet modified N, P co-doping carbon nanofibers on carbon cloth as lithiophilic host to construct high-performance anodes for Li metal batteries 认领 引用 被引量：6
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作者 Xiaoqiang Liu Qian Zhang +6 位作者 Yiru Ma Zhenzhen Chi Huixiang Yin Jie Liu Junfei Huang Ziyang Guo Lei Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第6期270-281,I0008,共12页
Lithium (Li) metal batteries have attracted much attention owing to its ultra-high energy density.However,as important part of Li metal batteries,Li anodes still face many challenges,mainly including uncontrolled dend... Lithium (Li) metal batteries have attracted much attention owing to its ultra-high energy density.However,as important part of Li metal batteries,Li anodes still face many challenges,mainly including uncontrolled dendritic Li formation,dramatical volume variation and serious pulverization.Herein,manganese dioxide (MnO2) nanosheet modified nitrogen (N),phosphorus (P) co-doping carbon nanofibers(NPC) on carbon cloth (CC)(MnO2@NPC-CC) is successfully fabricated through electrodeposition approach and further treated with Li by the molten-infusion method to prepare Li based Mn@NPC-CC(Li-Mn@NPC-CC) electrode.The synergy of MnO2 and NPC obviously increases the reaction rate between MnO2@NPC-CC and Li and guides even Li distribution over infusion process.Additionally,theoretical calculation,simulation and experimental results further indicate that N,P,Mn multi-doping effectively improves the superior lithiophilicity of Li-Mn@NPC-CC,which induces uniform Li deposition/dissolution to suppress dendrite growth over cycles.Moreover,conductive and porous NPC matrix not only effectively improves the stability of Li-Mn@NPC-CC,but also provides abundant spaces to accelerate the transfer of ion/electron and buffer electrode dimension variation during cycling.Hence,Li-Mn@NPC-CC-based symmetric cells exhibit extra-long cycling life (over 2200 h) with small hysteresis of 20 mV.When the LiMn@NPC-CC anode couples with air,Li iron phosphate (LiFePO4),or hard carbon (C) cathode,the assembled full cells exhibit outstanding performance with low hysteresis and stable cycling properties.Especially,the corresponding pouch-typed Li–air cells also exhibit good performance at different bending angles and even power a series of electronic devices. 展开更多
关键词 N,P co-doped carbon nanofibers on carbon cloth MnO2nanosheet coating Molten-infusion method Li metal anodes Li metal batteries
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The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO2 nanospheres for sodium-ion batteries 认领 引用 被引量：1
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作者 Zixing Guan Kaixiang Zou +2 位作者 Xiao Wang Yuanfu Deng Guohua Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第12期3847-3851,共5页
P-doping is an effective way to modulate the electronic structure and improve the Na+diffusion kinetics of TiO2, enabling enhanced electrochemical performance. However, it is a challenge to prepare TiO;with a high ... P-doping is an effective way to modulate the electronic structure and improve the Na+diffusion kinetics of TiO2, enabling enhanced electrochemical performance. However, it is a challenge to prepare TiO;with a high P-doping concentration starting from TiO2in a crystalline state. In this work, we design a novel two-step route for constructing a carbon-coated anatase P-doping TiO2nanospheres(denote as(PAn TSS)@NC) with high P-doping concentration, by utilizing amorphous TiO;nanospheres with the ultrahigh specific area as P-doping precursor firstly, and followed by carbon coating treatment. Experimental results demonstrate that P is successfully doped into the crystal lattice and carbon layer is well coated on the surface of TiO2, with P-doping and carbon-coating contents of ~13.5 wt% and 10.4 wt%, respectively,which results in the enhanced pseudocapacitive behavior as well as favorable Na+and electron transferring kinetics. The(P-AnTSS)@NC sample shows excellent rate and cycle performance, exhibiting specific capacities of 177 and 115 m Ah/g at 0.1 and 1.0 A/g after 150 and 2000 cycles, respectively. 展开更多
关键词 TiO2 Phosphorus-doping Carbon coating layer Anode material Sodium-ion batteries
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Improving the stability,lithium diffusion dynamics,and specific capacity of SrLi2Ti6O14via ZrO2coating 认领 引用
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作者 Hong-Li Ding Hai-Tao Yu +4 位作者 Xiao-dong Wang Chen-Feng Guo Bing Zheng Ying Xie Ting-Feng Yi 《Green Energy & Environment》 SCIE EI CAS CSCD 2022年第1期53-65,共13页
SrLi2Ti6O14(SLTO)coated with different amount of ZrO2was successfully prepared.The as-obtained composites are stacked by a series of particles with a pure phase structure and a good crystallinity.Furthermo... SrLi2Ti6O14(SLTO)coated with different amount of ZrO2was successfully prepared.The as-obtained composites are stacked by a series of particles with a pure phase structure and a good crystallinity.Furthermore,ZrO2coating not only enhances the structural stability of the materials but also facilitates the diffusion of lithium through the SEI film.As a result,the redox polarization was reduced,and the reversibility of the electrochemical reaction was enhanced.Particularly,SLTO-ZrO2-2 sample delivers a high initial lithiation capacity of 283.6 mA h g-1,and the values maintain at 251.7,228.0,207.4,175.3,and 147.7 mA h g-1at the current densities of 0.13,0.26,0.54,1.31,and 2.62 A g-1,respectively.Our experiment also confirmed that SLTO materials coated with ZrO2are suitable for high power density applications,and the lithiation specific energy efficiency of SLTO-ZrO2-2 is 200%as high as that of pure SLTO at a power density of 1257 W kg-1. 展开更多
关键词 SrLi2Ti6O14 ZrO2coating Structural stability Anode material Electrochemical performance
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强界面键合的绣球花状MnO@Ti3C2Tx负极材料制备与储锂性能 认领 引用
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作者 孙衍鹍 李泽辰 +7 位作者 王子昂 郑方植 廖思嘉 盘唐缘 叶强 肖志华 李永峰 徐春明 《洁净煤技术》 CAS CSCD 北大核心 2025年第8期133-146,共14页
氧化锰(MnO)具有理论比容量高(756 mAh/g)、成本低、资源丰富等优势,被视为极具开发潜力的锂离子电池(LIBs)负极材料。然而,MnO负极材料存在导电性差、结构不稳定和体积易膨胀等问题,致使MnO负极的首次库仑效率低、倍率性能差且循环寿... 氧化锰(MnO)具有理论比容量高(756 mAh/g)、成本低、资源丰富等优势,被视为极具开发潜力的锂离子电池(LIBs)负极材料。然而,MnO负极材料存在导电性差、结构不稳定和体积易膨胀等问题,致使MnO负极的首次库仑效率低、倍率性能差且循环寿命短。为了解决以上问题,提出一种简单的水热自组装策略,以乙酰丙酮锰为Mn源,在MXene-Ti3C2Tx层间完成自组装,得到Ti3C2Tx夹层的“绣球花状”有机碳包覆锰基前驱体,经煅烧得到具有强界面键合(Mn—O—Ti)的MnO@Ti3C2Tx复合材料。该多级复合结构能够全面提升MnO的电荷传输效率及结构稳定性,抑制其体积膨胀,暴露更多活性位点,从而提高MnO负极的储锂性能。作为LIBs负极材料,最优的MnO@Ti3C2Tx负极在0.1 A/g下的首圈库仑效率为73.71%,经充分活化后的可逆比容量达到997.38 mAh/g,循环100圈后的容量保持率为95.11%,表现出高比容量和优异的循环稳定性。此外,在2 A/g下循环300圈,其可逆比容量为552.36 mAh/g,远高于不含Ti3C2Tx的MnO负极。研究为高性能锰基负极材料的可控制备提供了新的思路。 展开更多
关键词 Ti3C2Tx 水热自组装 碳包覆 界面键合 锰基负极
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Bi2S3 spheres coated with MOF-derived Co9S8 and N-doped carbon composite layer for half/full sodium-ion batteries with superior performance 认领 引用 被引量：4
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作者 Youzhang Huang Xueshuang Zhu +3 位作者 Daoping Cai Zhixiang Cui Qianting Wang Hongbing Zhan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期473-481,I0010,共9页
Bismuth sulfide(Bi2S3)has attracted particular interest as a potential anode material for sodium-ion batteries(SIBs).However,the low electrical conductivity and dramatic volumetric change greatly restrict its pr... Bismuth sulfide(Bi2S3)has attracted particular interest as a potential anode material for sodium-ion batteries(SIBs).However,the low electrical conductivity and dramatic volumetric change greatly restrict its practical applications.In view of the apparent structural and compositional advantages of metal-organic frameworks(MOFs)derived carbon-based composite,herein,as a proof of concept,Bi2S3 spheres coated with the MOF-derived Co9S8 and N-doped carbon composite layer(Bi2S3@Co9S8/NC composite spheres)have been rational designed and synthesized.As expected,the core-shell Bi2S3@Co9S8/NC composite spheres exhibit remarkable electrochemical performance in terms of high reversible capacity(597 m Ah g-1 after 100 cycles at 0.1 A g-1),good rate capability(341 m Ah g-1 at 8 A g-1)and long-term cycling stability(458 m Ah g-1 after 1000 cycles at 1 A g-1)when investigated as anode materials for SIBs.Electrochemical analyses further reveal the favorable reaction kinetics in the Bi2S3@Co9S8/NC composite spheres.In addition,the possible sodium storage mechanism has been studied by ex-situ X-ray diffraction technique.More importantly,a sodium-ion full cell based on Na3 V2(PO4)3 GO as cathode and Bi2S3@Co9S8/NC as anode is also fabricated,suggesting their potential for practical applications.It is anticipated that the present work could be extended to construct other advanced electrode materials using MOFs-derived carbon-based composites as surface coating materials for various energy storagerelated applications. 展开更多
关键词 Bi2S3 Metal-organic frameworks Surface coating Anode materials Sodium-ion batteries
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电解液时效对两次阳极氧化法制备TiO2纳米管涂层及性能的影响 认领 引用
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作者 李月月 海几哲 +3 位作者 单春龙 李海杰 徐庆宇 雷岳衡 《表面技术》 EI CAS CSCD 北大核心 2025年第6期206-216,共11页
目的 在钛合金表面制备TiO2纳米管涂层,探究电解液重复阳极氧化后成分及数值的变化,以及电解液时效对TiO2纳米管涂层性能的影响。方法 采用乙二醇基电解液,通过两次阳极氧化法,在钛合金表面制备TiO2纳米管涂层,控制电解液时效... 目的 在钛合金表面制备TiO2纳米管涂层,探究电解液重复阳极氧化后成分及数值的变化,以及电解液时效对TiO2纳米管涂层性能的影响。方法 采用乙二醇基电解液,通过两次阳极氧化法,在钛合金表面制备TiO2纳米管涂层,控制电解液时效为0、10和20h。通过测试,对不同时效的电解液成分及涂层的结构、形态、物相组成、表面润湿性、耐腐蚀性、力学性能、膜结合强度和生物相容性进行综合表征与分析。结果 电解液时效的增加,导致电导率降至491μs/cm2,pH值升至8.11,氟离子浓度下降而钛离子浓度上升;电流密度降低,纳米管从纳米草状变为开放管顶形态,管壁增厚,管长从7.0μm缩短至4.4μm;物相组成保持不变;涂层的耐腐蚀性、硬度、弹性模量均得到增强。在3组样件中,电解液时效为10h的样件展现出最优的亲水性(15.10°)、结合强度(0.528 N)以及良好的生物相容性。结论 通过调节电解液时效可以提高TiO2纳米管涂层的耐蚀性、硬度和弹性模量,而TiO2纳米管涂层的形貌、亲水性与结合强度在特定的电解液时效范围内展现出优良性,并非随电解液时效的增加而提升。在电解液时效为10 h时,TiO2纳米管涂层的整体性能得到显著提高。 展开更多
关键词 钛合金 阳极氧化 TiO2纳米管涂层 电解液时效 微观形貌
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CTAB对Pb-Ag阳极MnO2镀膜电化学性能的影响 认领 引用
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作者 张泽 王恩泽 +3 位作者 郭孟伟 高明远 徐存英 张启波 《工程科学学报》 EI CAS CSCD 北大核心 2025年第10期1979-1988,共10页
工业锌电积通常采用Pb-Ag合金(0.5%~1.0%Ag(质量分数))作为阳极材料,然而其催化析氧活性低,导致阳极析氧反应过电位高、电极表面Pb电化学腐蚀、能耗增加.本文以十六烷基三甲基溴化铵(CTAB)为添加剂,通过干预Pb-Ag阳极表面MnO2的电结... 工业锌电积通常采用Pb-Ag合金(0.5%~1.0%Ag(质量分数))作为阳极材料,然而其催化析氧活性低,导致阳极析氧反应过电位高、电极表面Pb电化学腐蚀、能耗增加.本文以十六烷基三甲基溴化铵(CTAB)为添加剂,通过干预Pb-Ag阳极表面MnO2的电结晶过程,诱导生成具有良好耐蚀性和析氧活性的MnO2膜层.研究表明,锌电积体系中适量CTAB的引入可加速Mn2+→Mn3+中间体的氧化,促进MnO2的电结晶生长并均匀包覆在Pb-Ag基体上,有效提升电极的催化析氧活性和耐腐蚀性能.在模拟长周期工业锌电积过程中,1g·L-1CTAB辅助镀膜下制得的Pb-Ag/MnO2阳极(PAM-C1)较之工业镀膜条件下制备的MnO2镀膜阳极(IPAM),具有更优的析氧和耐蚀性能:500 A·m-2下,PAM-C1阳极的析氧电位(2.09 V(vs RHE))较IPAM(2.14 V(vs RHE))低50 mV,且性能稳定;经15天电解,相较IPAM阳极,基于PAM-C1阳极的电锌体系中溶铅量由0.7mg·L-1降低为0.6mg·L-1. 展开更多
关键词 锌电积 Pb-Ag阳极 MnO2镀膜 添加剂 催化析氧分类号TF813
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二组元(RuO2-TiO2)及三组元(RuO2-SnO2-TiO2)Ti阳极涂层的微观组织对其电化学性能的影响 认领 引用 被引量：8
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作者 韩朝辉 竺培显 +1 位作者 郭佳鑫 马会宇 《复合材料学报》 EI CAS CSCD 北大核心 2013年第6期121-126,共6页
通过热分解法制备了二组元(RuO2-TiO2)和三组元(RuO2-SnO2-TiO2)Ti阳极涂层,并通过SEM、XRD以及电化学工作站对其结构及性能进行测试。结果表明:在烘干温度130℃,热氧化温度500℃,烧结时间15min,退火时间1h的条件下,所... 通过热分解法制备了二组元(RuO2-TiO2)和三组元(RuO2-SnO2-TiO2)Ti阳极涂层,并通过SEM、XRD以及电化学工作站对其结构及性能进行测试。结果表明:在烘干温度130℃,热氧化温度500℃,烧结时间15min,退火时间1h的条件下,所制备的三组元(RuO2-SnO2-TiO2)Ti阳极涂层性能较为优异,析氯电位为1.128V,析氧电位为1.674V。在二组元(RuO2-TiO2)涂层中加入Sn组元,可以减少贵金属Ru的使用量,降低钛阳极涂层的成本;而且所形成的SnO2可提高涂层表面的电催化活性,降低电极的析氯电位、析氧电位,延长电极的工作寿命。 展开更多
关键词 钛阳极 活性涂层 RuO2-TiO2涂层 RuO2-SnO2-TiO2涂层 电化学性能
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Preparation of Hydroxyapatite-titanium Dioxide Coating on Ti6Al4V Substrates using Hydrothermal-electrochemical Method 认领 引用 被引量：4
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作者 何代华 WANG Pu +6 位作者 LIU Ping LIU Xinkuan MA Fengcang LI Wei CHEN Xiaohong ZHAO Jun YE Hong 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第2期461-467,共7页
Ti6Al4V substrates were anodized in a 0.5 mol/L H_2SO_4 solution at applied voltages of 90-140 V.A hydroxyapatite-titanium oxide（HA-TiO2）coating was then deposited on the anodized Ti6Al4 V substrates via a hydrother... Ti6Al4V substrates were anodized in a 0.5 mol/L H_2SO_4 solution at applied voltages of 90-140 V.A hydroxyapatite-titanium oxide（HA-TiO2）coating was then deposited on the anodized Ti6Al4 V substrates via a hydrothermal-electrochemicalmethod at a constant current.The obtained films and coatings were characterized by X-ray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and Fourier-transform infrared spectrometry.The microstructures of the porous films on the Ti6Al4 V substrates were studied to investigate the effect of the anodizing voltage on the phase and morphology of the HATiO_2 coating.The results indicated that both the phase composition and the morphology of the coatings were significantly influenced by changes in the anodizing voltage.HA-TiO_2 was directly precipitated onto the surface of the substrate when the applied voltage was between 110 and 140 V.The coatings had a gradient structure and the HA exhibited both needle-like and cotton-like structures.The amount of cotton-like HA structures decreased with an increase in voltage from 90 to 120 V,and then increased slightly when the voltage was higher than 120 V.The orientation index of the（002）plane of the coating was at a minimum when the Ti6Al4 V substrate was pretreated at 120 V. 展开更多
关键词 Ti6Al4V HA-TiO_2 coating anodic oxidation hydrothermal-electrochemical method
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电积锌用Pb-Ag/MnO2涂层阳极制备及电化学性能 认领 引用 被引量：1
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作者 李传斌 江洪林 +3 位作者 田林 袁学韬 胡志方 尹延西 《矿冶》 CAS 2024年第5期677-683,共7页
铅银合金(Pb-Ag)是锌电积及其它冶金工艺中应用最广泛的阳极材料。随着节能环保要求的逐渐提高,由于存在过电位低和稳定性差等缺点,Pb-Ag阳极难以适用于绿色工业体系的发展。如何提升其析氧催化活性、降低能耗并提高其耐腐蚀性能,成为... 铅银合金(Pb-Ag)是锌电积及其它冶金工艺中应用最广泛的阳极材料。随着节能环保要求的逐渐提高,由于存在过电位低和稳定性差等缺点,Pb-Ag阳极难以适用于绿色工业体系的发展。如何提升其析氧催化活性、降低能耗并提高其耐腐蚀性能,成为亟待解决的工业难题。采用恒电流电沉积法在Pb-Ag阳极上制备了纳米二氧化锰薄膜涂层,测试了阳极的组织和电化学性能。研究表明:MnO2涂层表面疏松裂纹结构不仅提高了催化活性,还促进了传质过程的进行,使得Pb-Ag/MnO2阳极的析氧反应活性和稳定性均优于Pb-Ag阳极。其中,Pb-Ag/MnO2阳极的析氧过电位为555 mV,塔菲尔斜率为208.5 mV/dec,优于Pb-Ag阳极的析氧过电位和塔菲尔斜率。同时,Pb-Ag/MnO2阳极在长周期的电解锌实验中表现出良好的析氧反应活性和耐腐蚀性能,其槽电压比Pb-Ag阳极槽电压小0.1 V左右,能耗低于Pb-Ag阳极。 展开更多
关键词 锌电积 Pb-Ag阳极 MnO2涂层 析氧活性 电化学性能 耐腐蚀性能
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高比容量Li2ZnTi3O8@C⁃N负极材料储锂性能研究 认领 引用 被引量：2
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作者 沈紫烨 王利娟 《石油化工高等学校学报》 CAS 2022年第3期1-9,共9页
以盐酸多巴胺为N、C源,高温固相法合成N掺杂C包覆Li2ZnTi3O8@C⁃N负极材料。在合成过程中发现,部分Ti4+被还原为Ti3+,达到了包覆和掺杂共同改性的目的。该方法有利于提高离子扩散系数和降低电荷转移电阻。在电流密度为0.5... 以盐酸多巴胺为N、C源,高温固相法合成N掺杂C包覆Li2ZnTi3O8@C⁃N负极材料。在合成过程中发现,部分Ti4+被还原为Ti3+,达到了包覆和掺杂共同改性的目的。该方法有利于提高离子扩散系数和降低电荷转移电阻。在电流密度为0.5、1.0、1.5、2.0、2.5、3.0 A/g时,Li2ZnTi3O8@C⁃N⁃2的放电比容量分别超过240.0、220.0、210.0、200.0、190.0、180.0 mA⋅h/g。还研究了N掺杂C包覆Li2ZnTi3O8复合材料的低温电化学性能。结果表明,0℃时该样品的放电比容量远高于未改性的Li2ZnTi3O8负极材料;电流密度为0.2 A/g时的首次放电比容量为262.5 mA⋅h/g,循环300次后放电比容量为241.7 mA⋅h/g;在电流密度为1.0 A/g、循环300次后放电比容量依然有147.4 mA⋅h/g。 展开更多
关键词 锂离子电池 钛酸锌锂 负极材料 碳包覆 自掺杂
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High ionic conductive protection layer on Zn metal anode for enhanced aqueous zinc-ion batteries 认领 引用 被引量：3
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作者 Xianyu Liu Qiongqiong Lu +1 位作者 Aikai Yang Yitai Qian 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第6期563-566,共4页
Aqueous zinc-ion batteries(ZIBs)has been regarded as a promising energy storage system for large-scale application due to the advantages of low cost and high safety.However,the growth of Zn dendrite,hydrogen evolution... Aqueous zinc-ion batteries(ZIBs)has been regarded as a promising energy storage system for large-scale application due to the advantages of low cost and high safety.However,the growth of Zn dendrite,hydrogen evolution and passivation issues induce the poor electrochemical performance of ZIBs.Herein,a Na3Zr2Si2PO12(NZSP)protection layer with high ionic conductivity of 2.94 m S/cm on Zn metal anode was fabricated by drop casting approach.The protection layer prevents Zn dendrites formation,hydrogen evolution as well as passivation,and facilitates a fast Zn~(2+)transport.As a result,the symmetric cells based on NZSP-coated Zn show a stable cycling over 1360 h at 0.5 m A/cm2with 0.5 m Ah/cm2 and 1000 h even at a high current density of 5 m A/cm2 with 2 m Ah/cm2.Moreover,the full cells combined with V2O5-based cathode displays high capacities and high rate capability.This work offers a facile and effective approach to stabilizing Zn metal anode for enhanced ZIBs. 展开更多
关键词 Na3Zr2Si2PO12 High ionic conductivity Drop casting Surface coating Zinc metal anode Aqueous zinc-ion batteries
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锂离子电池负极Si@LiAlO2纳米复合材料的简易制备 认领 引用 被引量：2
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作者 邱松 闫文宁 +4 位作者 王丽 张连山 陈超 穆丽娟 牟世刚 《无机化学学报》 SCIE CAS CSCD 北大核心 2022年第8期1655-1662,共8页
采用溶剂热法和煅烧法制备了LiAlO2包覆Si纳米颗粒(Si@LiAlO2)的复合材料。Si@LiAlO2纳米颗粒具有开口和通道的树枝状结构。电化学性能测试表明,其在100 mA·g-1电流密度下循环100次后可逆容量为364.1 mAh·g-1... 采用溶剂热法和煅烧法制备了LiAlO2包覆Si纳米颗粒(Si@LiAlO2)的复合材料。Si@LiAlO2纳米颗粒具有开口和通道的树枝状结构。电化学性能测试表明,其在100 mA·g-1电流密度下循环100次后可逆容量为364.1 mAh·g-1。纳米复合材料的树枝状结构使其具有优越的循环性能。在树枝状结构中,纳米尺度的硅颗粒缩短了锂离子的传输路径,LiAlO2包覆层、孔隙和开口缓冲了硅在充放电过程中的体积变化。 展开更多
关键词 硅纳米颗粒 LiAlO2包覆 负极材料
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Coupling Sb2WO6microflowers and conductive polypyrrole for efficient potassium storage by enhanced conductivity and K+ diffusivity 认领 引用 被引量：1
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作者 Ruiqi Tian Hehe Zhang +5 位作者 Zeyu Yuan Yuehua Man Jianlu Sun Jianchun Bao Ming-Sheng Wang Xiaosi Zhou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第2期250-258,I0007,共9页
Although metal oxide compounds are considered as desirable anode materials for potassium-ion batteries(PIBs)due to their high theoretical capacity,the large volume variation remains a key issue in realizing metal oxid... Although metal oxide compounds are considered as desirable anode materials for potassium-ion batteries(PIBs)due to their high theoretical capacity,the large volume variation remains a key issue in realizing metal oxide anodes with long cycle life and excellent rate property.In this study,polypyrroleencapsulated Sb2WO6(denoted Sb2WO6@PPy)microflowers are synthesized by a one-step hydrothermal method followed by in-situ polymerization and coating by pyrrole.Leveraging the nanosheet-stacked Sb2WO6microflower structure,the improved electronic conductivity,and the architectural protection offered by the PPy coating,Sb2WO6@PPy exhibits boosted potassium storage properties,thereby demonstrating an outstanding rate property of 110.3 m A h g-1at 5 A g-1and delivering a long-period cycling stability with a reversible capacity of 197.2 m A h g-1after 500 cycles at 1 A g-1.In addition,the conversion and alloying processes of Sb2WO6@PPy in PIBs with the generation of intermediates,K2WO4and K3Sb,is determined by X-ray photoelectron spectroscopy,transmission electron microscopy,and exsitu X-ray diffraction during potassiation/depotassiation.Density functional theory calculations demonstrate that the robust coupling between PPy and Sb2WO6endues it with a much stronger total density of states and a built-in electric field,thereby increasing the electronic conductivity,and thus effectively reduces the K+diffusion barrier. 展开更多
关键词 Sb2WO6 Polypyrrole coating Anode Potassium-ion battery In-situ TEM observation
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