Nonflammable perfluoropolyether-based electrolytes for lithium batteries

Date Published
03/2014
Publication Type
Journal Article
Authors
DOI
10.1073/pnas.1314615111
Abstract

The flammability of conventional alkyl carbonate electrolytes hinders the integration of large-scale lithium-ion batteries in transportation and grid storage applications. In this study, we have prepared a unique nonflammable electrolyte composed of low molecular weight perfluoropolyethers and bis(trifluoromethane)sulfonimide lithium salt. These electrolytes exhibit thermal stability beyond 200 °C and a remarkably high transference number of at least 0.91 (more than double that of conventional electrolytes). Li/LiNi1/3Co1/3Mn1/3O2 cells made with this electrolyte show good performance in galvanostatic cycling, confirming their potential as rechargeable lithium batteries with enhanced safety and longevity.

Journal
Proceedings of the National Academy of Sciences
Volume
111
Year of Publication
2014
Issue
9
Pagination
3327 - 3331
ISSN Number
0027-8424
Short Title
Proceedings of the National Academy of Sciences
Keywords
Organizations
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