锂离子电池硅基负极功能型黏结剂研究进展

Research progress of functional binders for silicon-based anodes in lithium-ion batteries

在锂离子电池负极材料中,硅材料因具有较高的理论比容量被认为是最有前景的高容量负极材料之一。黏结剂是锂离子电池的重要组成部分,其性能的优劣会直接影响电极的容量和循环性能。然而,常用的黏结剂功能较为单一,在一定程度上并不能满足高能量密度电池的要求。因此,黏结剂的功能化改性是提高电极容量、长循环和安全性能的重要手段。该文综述了锂离子电池功能型黏结剂的最新研究进展,主要介绍了自愈合型黏结剂、导电型黏结剂以及阻燃型黏结剂,最后展望了硅基负极黏结剂的发展方向。

Silicon is considered as one of the most promising anode materials with high capacity for lithiumion battery due to its high theoretical specific capacity.Binder is an important part of lithium-ion battery,its adhesion performance quality directly affect the capacity and cycle performance of the electrode.However,commonly used commercial binders have relatively single function,which can not meet the requirements of high energy density battery to a certain extent.Therefore,the functional modification of binders is one of the important means to improve electrode capacity,long cycle and safety performance.In this paper,the latest research progress of functional binders for silicon-based anodes in lithium-ion batteries is reviewed.The self-healing binder,conductive binder and flame retardant binder are focused on.Finally,the development trend of binder for silicon-based anodes is prospected.