锂离子电池硅基负极比容量提升的研究进展  

Research progress of specific capacity improvements of silicon-based anodes in lithium-ion batteries

作　　者：余晨露 田晓华 张哲娟[1] 孙卓[1] YU Chenlu;TIAN Xiaohua;ZHANG Zhejuan;SUN Zhuo(School of Physics and Electronic Science,East China Normal University,Shanghai 200214,China)

机构地区：[1]华东师范大学物理与电子科学学院,上海200214

出　　处：《储能科学与技术》2020年第6期1614-1628,共15页Energy Storage Science and Technology

基　　金：上海市科委社发项目(19DZ1205102);企业横向项目(2018KFR0125);企业横向项目(2020KFR0051)。

摘　　要：优化锂离子电池负极材料的首次库仑效率和循环稳定性对提升电池的可逆比容量具有重要意义。硅碳复合材料是目前公认的下一代锂离子电池负极材料,本文调研了硅碳二次粒子负极的工艺细节对电池性能的影响,介绍了硅碳二次粒子结构设计、硅基负极材料的预锂化及硅基负极黏结剂等研究进展及存在的不足。在综合分析硅基负极材料的基础科学问题与提升比容量的关键技术的基础上,对开发高性能、高稳定性硅基负极材料的结构、工艺、黏结材料体系方面提出明确要求。Optimizing the initial coulombic efficiency and cycling stability of anode materials is important to improve the specific capacity of lithium-ion batteries.Acknowledgedly,silicon-carbon composite material has been regarded as the most promising candidate for the next generation of lithium-ion batteries.In this paper,to the point of higher specific capacity,the structure design of secondary particles of silicon-based carbon anode material is detailed.Meanwhile,the up-to-date achievements and bottlenecks in secondary particles design,pre-lithiation strategies and binder explorations of silicon-based anodes are systematically reviewed,given their importance in electrochemical performance promotion and specific capacity upliftment.Based on many basic scientific issues and critical technologies for specific capacity of silicon-based anodes,the suitable design of structure,process and selection of binder are recommended to the achieve in higher power and better stability of anodes on lithium-ion batteries.

关 键 词：锂离子电池 硅基负极材料 首次库仑效率 硅碳复合粒子结构 预锂化 硅基黏结剂 

分 类 号：TM911[电气工程—电力电子与电力传动]