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Nonflammable perfluoropolyether-based electrolytes for lithium batteries

Publication Type

Journal Article

Date Published

03/2014

Authors

Wong, Dominica H. C, Jacob L Thelen, Yanbao Fu, Didier H Devaux, Ashish A Pandya, Vincent S Battaglia, Nitash P Balsara, Joseph M DeSimone

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/LiNi_1/3Co_1/3Mn_1/3O₂ 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

ISSN

0027-8424

Organization

Energy Storage Group, Energy Storage and Distributed Resources Division, Battery Group