Triphenyl borate (TPB) was attempted to introduce into lithium-ion batteries (LIBs) as a novel electrolyte additive. The effects of the additive on the electrolyte properties and electrochemical performances of a conventional artificial graphite (AG) and a commercial silicon-carbon (SiC) anode were investigated. It is found that the moderate addition of TPB remarkably increases the reversible capacity and coulombic efficiency, as well as improves the cycle and rate capability of the two anodes. The CV, SEM and XPS combined with DFT calculation reveal that the TPB can be preferentially reduced on the anode to generate B-rich solid electrolyte interphase (SEI) with low interface resistance, which effectively stabilizes the anode surface to mitigate the parasitic reaction.

尝试将硼酸三苯酯 (TPB) 作为一种新型电解质添加剂引入锂离子电池 (LIB) 中。研究了添加剂对传统人造石墨 (AG) 和商用硅碳 (SiC) 阳极的电解质性能和电化学性能的影响。结果表明，适度添加TPB显着提高了可逆容量和库仑效率，同时提高了两种负极的循环和倍率性能。CV、SEM 和 XPS 结合 DFT 计算表明，TPB 可以在阳极上优先还原，生成界面电阻低的富 B 固体电解质界面（SEI），有效稳定阳极表面，减轻寄生反应。