Journal
CHEMELECTROCHEM
Volume 2, Issue 11, Pages 1707-1712Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201500286
Keywords
1,1,1,3,3,3-hexafluoroisopropyl methyl ether; compatibility; fluorine; lithium-ion batteries; nonflammable electrolytes
Categories
Funding
- Key Research Program of the Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010101]
- National Natural Science Foundation of China [21503246]
- Natural Science Foundation of Ningbo [2014A610049]
- China Postdoctoral Science Foundation [2014M560498, 2015T80641]
- Natural Science Foundation of Zhejiang [LY13B030007]
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A novel electrochemically compatible, high-voltage, and nonflammable electrolyte has been prepared based on a fluorinated ether with no flash point, that is, 1,1,1,3,3,3-hexafluoroisopropyl methyl ether (HFPM). Our experimental results demonstrate that this F-electrolyte is not only totally nonflammable in fire burning tests, but it also exhibits a remarkably high anodic stability of at least 5.5V (vs. Li+/Li). In particular, this F-electrolyte has good compatibility with graphite anodes. Mesocarbon microbeads/LiNi0.5Mn1.5O4 18650 batteries made with this F-electrolyte display an excellent cycling stability with 82% capacity retention after 200 cycles at a high cutoff voltage of 4.9V, confirming their potential as high-voltage lithium-ion batteries with enhanced safety and longevity.
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