期刊
ELECTROCHIMICA ACTA
卷 129, 期 -, 页码 327-333出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.02.090
关键词
Lithium difluoro(sulfato)borate; Electrolyte; Thermal stability; Elevated temperature; Lithium-ion battery
资金
- Science and Technology Planning Project of Gansu Province [2013GS09494]
- Branchy Tamarisk Development Program for Young Teachers of Lanzhou University of Technology [Q201105]
- Natural Science Foundation of China [51063003]
- Foundation of Knowledge Innovation Program of Chinese Academy of Sciences [kzcx2-ew-qn309]
High-temperature electrochemical behaviors of the novel salt named lithium difluoro(sulfato)borate (LiBF2SO4) were studied by employment of ethylene carbonate (EC) and dimethyl carbonate (DMC) as mixed solvents. In Li/MCMB (mesophase carbon microbeads) cells at 80 degrees C, LiBF2SO4-EC/DMC electrolyte favourably facilitates the formation of a thermal stable, effective and conductive interface film on the surface of carbonaceous anode. Besides, in LiFePO4/Li cells at 80 degrees C, LiBF2SO4-EC/DMC electrolyte exerts several advantages, such as stable cycling performance, low polarization resistance, and good rate performance. It suggests that LiBF2SO4 is an excellent candidate salt for advanced high-temperature lithium-ion batteries. (C) 2014 Elsevier Ltd. All rights reserved.
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