锂离子电池硅基负极用粘结剂的设计改性进展

发展锂离子电池是缓解当前能源和环境问题的有力措施，但其能量密度已无法满足未来储能装置的高要求。发展高比能量型锂离子电池必须从提高电极材料的性能入手。硅基材料具有容量高、成本低、平台电压低等优点，被认为是最具潜力的负极材料。然而，该类材料在充放电过程中会发生巨大的体积变化(300%)，导致电池容量下降严重甚至失效。近年来，研究者们开始着眼于通过对电极中的粘结剂进行结构设计和复合改性来提升硅基负极的性能，并取得了显著的效果。基于硅基负极目前存在的问题，总结了适用于硅基负极的粘结剂类型，并从粘结剂分子链结构设计和增强电极微粒间作用力这两个方面综述了近年来硅基负极中粘结剂的设计改性进展，最终展望了硅基负极用粘结剂的发展趋势和未来前景。 

Design and modification progress of binders for silicon-based anodes of lithium-ion batteries

Developing lithium-ion batteries (LIBs) is a powerful measure to alleviate current energy and environmental problems, but their energy density can no longer meet the high requirements of future energy storage devices. The development of LIBs with high energy density must start from improving the performance of electrode materials. Silicon-based materials have the advantages of high capacity, low cost, and low platform voltage, and are considered to be the most promising anode materials. However, this type of material would undergo a huge volume change (300%) during charging and discharging processes, resulting in serious capacity decline or even failure. In recent years, researchers have begun to focus on improving the performance of silicon-based anodes through structural design and composite modification of the binder in the electrode, and significant results have been achieved. In this paper, the existing problems of silicon-based anodes were briefly introduced, and the types of the binders suitable for silicon-based anodes were summarized. The progress in the design and modification of the binders in silicon-based anodes in recent years was reviewed from the aspects of molecular chain structure design of the binders and enhancement of inter particle force in the electrode. Finally, the development trend and future prospect of the binders for silicon-based anodes were prospected.