A highly concentrated phosphate-based electrolyte for high-safety rechargeable lithium batteries

We prepare a totally nonflammable phosphate-based electrolyte composed of 5 mol L-1 (M) Li bis(fluorosulfonyl) imide (LiFSI) in a trimethyl phosphate (TMP) solvent. The concentrated 5 M LiFSI/TMP electrolyte shows good compatibility with graphite and no Al corrosion. More attractively, such a concen...

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Published inChemical communications (Cambridge, England) Vol. 54; no. 35; pp. 4453 - 4456
Main Authors Shi, Pengcheng, Zheng, Hao, Liang, Xin, Sun, Yi, Cheng, Sheng, Chen, Chunhua, Xiang, Hongfa
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 2018
Subjects
Electrolytes
Lithium
Lithium batteries
Lithium fluoride
Rechargeable batteries
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Summary:We prepare a totally nonflammable phosphate-based electrolyte composed of 5 mol L-1 (M) Li bis(fluorosulfonyl) imide (LiFSI) in a trimethyl phosphate (TMP) solvent. The concentrated 5 M LiFSI/TMP electrolyte shows good compatibility with graphite and no Al corrosion. More attractively, such a concentrated electrolyte can effectively suppress the growth of Li dendrites in Li metal batteries because of a stable LiF-rich SEI layer. Therefore, this highly concentrated electrolyte is promising for safe Li batteries.
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ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc00994e