Tris (pentafluorophenyl) phosphine: An electrolyte additive for high voltage Li-ion batteries

被引：128

作者：

Xu, Mengqing ^{[1
,2
,3
]}

Liu, Yanlin ^{[1
]}

Li, Bin ^{[1
]}

Li, Weishan ^{[1
,2
,3
]}

Li, Xiaoping ^{[1
,2
,3
]}

Hu, Shejun ^{[1
,2
,3
]}

机构：

[1] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China

[2] S China Normal Univ, Key Lab Electrochem Technol Energy Storage & Powe, Guangdong Higher Educ Inst, Guangzhou 510006, Guangdong, Peoples R China

[3] S China Normal Univ, Engn Res Ctr Mat & Technol Electrochem Energy Sto, Minist Educ, Guangzhou 510006, Guangdong, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 18卷

基金：

中国国家自然科学基金;

关键词：

Tris (pentafluorophenyl) phosphine; Additive; High voltage; Li-ion battery;

D O I：

10.1016/j.elecom.2012.02.037

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Tris (pentafluorophenyl) phosphine (TPFPP) is used as an electrolyte additive to improve the cycling performance of high voltage (similar to 5 V) lithium-ion battery. The electrochemical behaviors and surface chemistry of LiNi0.5Mn1.5O4 are investigated via cyclic voltammetry, chronoamperometry, charge-discharge test. X-ray photoelectron spectroscopy, and theoretical computations. It is found that the cycling performance of the cell Li/LiNi0.5Mn1.5O4, using an electrolyte of 1.0 M LiPF6 in ethylene carbonate/dimethyl carbonate/diethyl carbonate (1/1/1, in volume), can be improved by adding TPFPP into the electrolyte. The theoretical calculations predict that TPFPP is preferably oxidized compared to the solvents. Electrochemical measurements and XPS analyses show that a protective film is formed on LiNi0.5Mn1.5O4 when TPFPP is used, which contributes to the cycling performance improvement of the cell. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：123 / 126

页数：4

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