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Nonflammable perfluoropolyether-based electrolytes for lithium batteries.

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.

SUBMITTER: Wong DH

PROVIDER: S-EPMC3948224 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature

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Nonflammable perfluoropolyether-based electrolytes for lithium batteries.

Wong Dominica H C DH Thelen Jacob L JL Fu Yanbao Y Devaux Didier D Pandya Ashish A AA Battaglia Vincent S VS Balsara Nitash P NP DeSimone Joseph M JM

Proceedings of the National Academy of Sciences of the United States of America 20140210 9

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 e ...[more]

PMID: 24516123

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