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有色金属(冶炼部分):2020,(5):75-78
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硅钛负极储锂过程交流阻抗分析
(1.昆明理工大学 冶金与能源工程学院;2.锂离子电池及材料国家地方联合工程实验室)
Study on Electrochemical Impedance Spectroscopy of Silicon-Titanium Anode in Lithiation Storage Process
ZHOU Zhong-ren1,2,3, ZHANG Ying-jie, HUA Yi-xin, DONG Peng, ZHANG Qi-bo, DUAN Jian-guo
(1.Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology;2.China;3.National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology)
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投稿时间:2019-10-02     修订日期:2019-10-04     录用日期:2019-10-07     网络发布日期:2020-04-18
中文摘要: 为研究钛含量对硅钛负极电化学储锂反应动力学过程的影响,通过交流阻抗分析法测试了硅钛摩尔比分别为50和25时,硅钛负极在200 mA/g电流密度下充放电100圈后的电阻值。结果表明,降低硅在复合材料中的含量有利于减少SEI(Solid Electrolyte Interphase,固体电解质膜)的生成量、降低电荷转移电阻值。当硅钛摩尔比为25时,负极具有更好的电极反应动力学过程,电荷转移阻抗从初始阶段142 Ω增加至212 Ω。
中文关键词: 硅钛负极  交流阻抗  锂离子电池
Abstract:In order to investigate influence of titanium content on electrochemical lithiation storage kinetics of silicon-titanium anode, resistance value of anode was measured as it was discharged/charged for 100 cycles at current density of 200 mA/g with Ti/Si molar ratios of 50 and 25 respectively. The results suggest that decreasing silicon concentration of composite benefits reduces production of SEI (Solid Electrolyte Interphase) and thus reduces charge transfer resistance. As molar ratio of Ti/Si is 25, the anode exhibits better reaction kinetics with charge transfer resistance rising from 142 Ω to 212 Ω.
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基金项目:国家自然科学基金资助项目(51804148);云南省应用基础研究计划项目(2018FD038)
引用文本:
周忠仁,张英杰,华一新,董鹏,张启波,段建国.硅钛负极储锂过程交流阻抗分析[J].有色金属(冶炼部分),2020(5):75-78.
ZHOU Zhong-ren,ZHANG Ying-jie,HUA Yi-xin,DONG Peng,ZHANG Qi-bo,DUAN Jian-guo.Study on Electrochemical Impedance Spectroscopy of Silicon-Titanium Anode in Lithiation Storage Process[J].Nonferrous Metals (Extractive Metallurgy),2020(5):75-78.

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