电解质
氟化锂
钝化
材料科学
碳酸锂
离子电导率
相间
锂(药物)
化学工程
离子
离子键合
化学
快离子导体
电极
无机化学
纳米技术
图层(电子)
有机化学
遗传学
物理化学
内分泌学
工程类
生物
医学
作者
Qinglin Zhang,Jie Pan,Peng Lu,Zhongyi Liu,Mark W. Verbrugge,Brian W. Sheldon,Yang‐Tse Cheng,Yue Qi,Xingcheng Xiao
出处
期刊:Nano Letters
[American Chemical Society]
日期:2016-02-18
卷期号:16 (3): 2011-2016
被引量:362
标识
DOI:10.1021/acs.nanolett.5b05283
摘要
The solid electrolyte interphase (SEI), a passivation layer formed on electrodes, is critical to battery performance and durability. The inorganic components in SEI, including lithium carbonate (Li2CO3) and lithium fluoride (LiF), provide both mechanical and chemical protection, meanwhile control lithium ion transport. Although both Li2CO3 and LiF have relatively low ionic conductivity, we found, surprisingly, that the contact between Li2CO3 and LiF can promote space charge accumulation along their interfaces, which generates a higher ionic carrier concentration and significantly improves lithium ion transport and reduces electron leakage. The synergetic effect of the two inorganic components leads to high current efficiency and long cycle stability.
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