| 硅基锂离子电池负极材料的容量衰减及改进研究 |
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| 引用本文： | 戴剑锋,朱晓军,刘骥飞,李维学,王青,贾钰泽.硅基锂离子电池负极材料的容量衰减及改进研究[J].化工新型材料,2019,47(5):222-226. |
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| 作者姓名： | 戴剑锋 朱晓军 刘骥飞 李维学 王青 贾钰泽 |
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| 作者单位： | 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州,730050;兰州理工大学材料科学与工程学院,兰州,730050;国家镍钴新材料工程技术研究中心,兰州,730010 |
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| 摘 要： | 硅材料的比容量(Li15Si4,3590mAh/g)是已商用化的石墨负极(LiC6,372mAh/g)的10倍,硅负极的商业化可有效提高单体电芯的容量,已成为当前研究热点。然而,由于硅负极材料在充放电循环时存在400%的体积膨胀,容易导致电极材料粉化开裂而从集流体上剥落,使得活性物质与活性物质、集流体之间失去电接触,同时不断形成新的固体电解质相界面膜(SEI膜),最终导致电化学性能的恶化。本研究从硅负极材料的储锂机理出发,提出硅负极材料锂化/脱锂化产生的体积膨胀效应导致的粉化开裂和SEI膜不稳定问题的最新调控方法和研究方向,为硅负极材料的研究应用提供支持。
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| 关 键 词： | 锂离子电池 负极材料 体积膨胀 SEI膜 |
Improvement of capacity fading of Si-based cathode for lithium-ion battery |
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| Dai Jianfeng,Zhu Xiaojun,Liu Jifei,Li Weixue,Wang Qing,Jia Yuze.Improvement of capacity fading of Si-based cathode for lithium-ion battery[J].New Chemical Materials,2019,47(5):222-226. |
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| Authors: | Dai Jianfeng Zhu Xiaojun Liu Jifei Li Weixue Wang Qing Jia Yuze |
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| Affiliation: | (School of Material Science and Engineering, Lanzhou University of Technology , Lanzhou 730050;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology, Provincial and Ministerial Co-construction, Lanzhou 730050;National Nickel and Cobalt Advanced Materials Engineering Research Center, Lanzhou 730010) |
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| Abstract: | Dai Jianfeng;Zhu Xiaojun;Liu Jifei;Li Weixue;Wang Qing;Jia Yuze(School of Material Science and Engineering, Lanzhou University of Technology , Lanzhou 730050;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology, Provincial and Ministerial Co-construction, Lanzhou 730050;National Nickel and Cobalt Advanced Materials Engineering Research Center, Lanzhou 730010) |
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| Keywords: | lithium-ion battery cathode material volume expansion solid electrolyte interface film |
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