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Lithium difluoro(sulfato)borate as a novel electrolyte salt for high-temperature lithium-ion batteries

Authors
  • Li, Shiyou
  • Zhao, Wei
  • Cui, Xiaoling
  • Zhang, Hongming
  • Wang, Xiuxiu
  • Zhong, Wanxiang
  • Feng, Huixia
  • Liu, Haining1, 2
  • 1 College of Petrochemical Technology
  • 2 Key Laboratory of Salt Lake Resources and Chemistry
Type
Published Article
Journal
Electrochimica Acta
Publisher
Elsevier
Publication Date
Jan 01, 2014
Accepted Date
Feb 17, 2014
Volume
129
Pages
327–333
Identifiers
DOI: 10.1021/am405973x
Source
Elsevier
Keywords
License
Unknown

Abstract

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°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°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.

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