关键词: 锂离子电池, 硅基负极, 聚合物黏结剂, 循环性能

Abstract: Silicon based materials are the most ideal candidates for the next generation Li-ion battery with high specific energy density due to their excellent characteristics such as high theoretical specific capacity, safe lithium intercalation potential and low cost. Despite have been studied for a long time, silicon based anodes suffer from immense volume change and chronic capacity fading during cycling. The development of novel binders with high performance is an effective way to promote the commercial application of silicon-based anodes. The polymer binders with rigid and flexible properties at the same time can restrain pulverization of silicon based materials and maintain the integrity of electrode conductive network, thus improving the cycle performance of silicon based anodes effectively. In this paper, the characteristic requirement for binders in silicon-based anodes and the current research progress of some novel binders are reviewed. In addition, some potential research directions in this field have been presented, including the investigation of composite binders, the investigation of binders with special space structures, and the investigation of conductive binders; the investigation of self-supporting non-binder silicon based anode.

Key words: lithium ion battery, silicon based materials, polymer binder, cycling performance