期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 7, 页码 4920-4926出版社
AMER CHEMICAL SOC
DOI: 10.1021/am405973x
关键词
lithium-ion battery; lithium difluoro(oxalato)borate; sulfolane; wide-temperature electrolyte; high-temperature batteries; low-temperature batteries
资金
- Science and Technology Planning Project of Gansu Province [1308RJZA259]
- Branchy Tamarisk Development Program for Young Teachers of Lanzhou University of Technology [Q201105]
- Foundation of Knowledge Innovation Program of Chinese Academy of Sciences [kzcx2-ew-qn309]
- National Natural Science Foundation of China [21206065]
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.
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