【摘要】 用循环伏安(CV)、恒电流充放电(GC)、扫描电镜(SEM)以及傅里叶红外光谱(FT-IR)方法研究了添加剂碳酸亚乙烯酯(VC)对锂离子电池负极界面膜性质及电池循环性能的影响。研究表明,在首次充电过程中VC参与了SEI膜的形成,形成的膜主要成分为Li2CO3以及VC的还原聚合物。充放电实验结果表明电解液中加入少量VC能显著提高电池的初始放电容量,电池的循环稳定性也有所提高。更多还原

【Abstract】 The effect of vinylene carbonate(VC) additive on the anode surface and the performance of lithium ion battery were studied by cyclic voltammetry(CV),galvanostatic charge-discharge(GC),scanning electron microscopy(SEM),as well as Fourier transform infrared spectroscopy(FTIR).The results indicate that VC participates into the formation of solid electrolyte interface(SEI) film during the first cycle,and the main components of the surface are consisted of Li2CO3 and poly-VC products deriving from the reduction of VC.The charge-discharge experiment shows that the VC can increase the specific capacity and cyclic stability of the battery.更多还原