Enhanced cycling stability of Mg2Si anode in fluoroethylene carbonate binary solvent for Li-ion batteries

被引：6
作者：
Men, Fang [1 ]
Zhong, Hai [1 ,2 ]
Song, Zhiping [1 ]
Zhan, Hui [1 ,3 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Hubei, Peoples R China
[2] Power Source Res Inst Tianjin, Tianjin 300381, Peoples R China
[3] Wuhan Univ, Engn Res Ctr Organosilicon Cpds & Mat, Minist Educ, Wuhan 430072, Hubei, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 212卷
关键词：
Li-ion battery; Mg2Si anode; Cycling stability; Fluoroethylene carbonate; Vinylene carbonate; Solid electrolyte interface; SOLID-ELECTROLYTE INTERPHASE; LITHIUM-METAL ANODE; SILICON ANODES; COMPOSITE ELECTRODES; IMPORTANT COMPONENT; VINYLENE CARBONATE; SI; PERFORMANCE; MECHANISM; FILM;
D O I：
10.1016/j.matchemphys.2018.03.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fluoroethylene carbonate (FEC) is proposed as the co-solvent for magnesium silicide (Mg2Si) anode in Li-ion battery. Comparing with ethylene carbonate (EC)+dimethyl carbonate (DMC) solvent, FEC + DMC solvent leads to much better cycling stability, such as 400 mAh g(-1) after 100 cycles. The effect of FEC is investigated in terms of XPS, SEM and electrochemical analysis, and vinylene carbonate (VC) is also studied to better understand the function of FEC. The results show that FEC adding significantly alter the solid electrolyte interface (SEI) formed on Mg2Si, it helps to build a much denser, robust and LiF-rich SEI. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：131 / 137
页数：7
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