Studies on Electrochemical Performances of Novel Electrolytes for Wide-Temperature-Range Lithium-Ion Batteries

被引：67

作者：

Li, Shiyou ^{[1
]}

Zhao, Wei ^{[1
]}

Zhou, Zhifang ^{[1
]}

Cui, Xiaoling ^{[1
]}

Shang, Zhichao ^{[1
]}

Liu, Haining ^{[2
]}

Zhang, Dongqiang ^{[1
]}

机构：

[1] Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China

[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 07期

基金：

中国国家自然科学基金;

关键词：

lithium-ion battery; lithium difluoro(oxalato)borate; sulfolane; wide-temperature electrolyte; high-temperature batteries; low-temperature batteries; SULFOLANE; BIS(OXALATE)BORATE; INTERFACE; IMPEDANCE; GRAPHITE; SULFITES; LIMN2O4; SALTS; LIBOB;

D O I：

10.1021/am405973x

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Wide-temperature electrochemical behaviors of sulfolane (SL) with lithium difluoro(oxalato)borate (LiODFB) are studied using dimethyl sulfite (DMS) and diethyl sulfite (DES) as mixed solvents, respectively. In LiFePO4/Li cells, LiODFB-SL/DMS and LiODFB-SL/DES electrolytes always exert several advantages over a wide temperature range, such as stable cycling performance and good rate performance. Besides, in Li/mesophase carbon microbead cells, these novel electrolytes respectively exhibit excellent film-forming characteristics at both +60 and -20 degrees C, such as the formation of a stable and conductive SEI layer. It suggests that LiODFB-SL/DMS and LiODFB-SL/DES electrolytes are alterative candidate electrolytes for wide-temperature-range lithium-ion batteries.

引用

页码：4920 / 4926

页数：7

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