锂离子电池硅基负极用黏结剂研究进展

Advances of Binders for Silicon-Based Anodes in Lithium-ion Batteries

具有硅基负极的锂离子电池,由于其理论比容量高、工作电压低的优点,被认为是最具前景的下一代锂离子电池。然而,锂化后硅基材料固有的较大体积膨胀以及由此产生的问题,严重制约着硅基负极材料的实际应用。总结了高弹性聚合物黏结剂、自修复聚合物黏结剂和导电聚合物黏结剂3种不同功能类型的聚合物黏结剂,对硅基负极用黏结剂的最新研究现状进行了分析和概述。并在此基础上,提出合理设计硅基负极用黏结剂方法和实现工业化生产建议。

Lithium-ion batteries with silicon-based anodes are considered to be the most promising next-generation Lithium-ion batteries due to their high theoretical specific capacity and low operating voltage.However,the inherent huge volume expansion of silicon-based materials after lithiation and the resulting problems seriously restrict the practical application of silicon-based anodes.From different functional types of polymer binders,the latest research progress of binders for silicon-based anodes is summarized.Finally,a method for rationally designing binders for silicon-based anodes and suggestions for industrial production are proposed.