阳极
电化学
电解质
锂(药物)
硅
离子
材料科学
化学工程
无机化学
化学
电极
光电子学
有机化学
内分泌学
工程类
物理化学
医学
作者
Guobin Zhu,Siming Yang,Yan Wang,Qunting Qu,Honghe Zheng
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2019-01-01
卷期号:9 (1): 435-443
被引量:23
摘要
To enhance the electrochemical properties of silicon anodes in lithium-ion batteries, dimethylacrylamide (DMAA) was selected as a novel electrolyte additive. The addition of 2.5 wt% DMAA to 1.0 M LiPF6/EC : DMC : DEC : FEC (3 : 3 : 3 : 1 weight ratio) electrolyte significantly enhanced the electrochemical properties of the silicon anode including the first coulombic efficiency, rate performance and cycle performance. The solid electrolyte interphase (SEI) layers developed on the silicon anode in different electrolytes were investigated by a combination of electrochemical and spectroscopic studies. The improved electrochemical performances of the Si anode were ascribed to the effective passivation of DMAA on the silicon anode. The addition of DMAA helped develop a uniform SEI layer, which prevented side reactions at the interface of silicon and electrolyte.
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