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Mitigating thermal runaway of lithium‐ion battery by using thermally sensitive polymer blend as cathode binder
Author(s) -
Le Anh V.,
Wang Meng,
Noelle Daniel J.,
Shi Yang,
Qiao Yu
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45737
Subject(s) - thermal runaway , materials science , hexafluoropropylene , crystallinity , composite material , fluoride , polymer , lithium (medication) , lithium ion battery , battery (electricity) , anode , penetration (warfare) , chemical engineering , copolymer , chemistry , tetrafluoroethylene , inorganic chemistry , electrode , medicine , power (physics) , physics , quantum mechanics , operations research , engineering , endocrinology
Thermally sensitive binder (TSB) is developed as an internal safety mechanism of lithium‐ion battery (LIB). The TSB is a polymer blend of poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride‐ co ‐hexafluoropropylene) (PVDF‐HFP). Compared with regular PVDF binder, the softening and swelling of TSB are more pronounced when temperature is above 110 °C. With the TSB, the cycling performance of LIB cell is not affected; upon nail penetration, the heat generation rate is significantly reduced. The crystallinity of TSB is an important factor. This technology may lead to the development of thermal‐runaway‐mitigating LIB cells. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45737.