Fire-Inhibiting Nonflammable Gel Polymer Electrolyte for Lithium-Ion Batteries

Herein, we present a gel polymer electrolyte (GPE) improving nonflammability of lithium-ion batteries (LIBs) by blocking radical-initiated chain reactions which cause thermal runaway and finally fire issues. The polymer that makes up the nonflammable GPE was (1) soluble in carbonate electrolytes, (2...

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Published inACS energy letters Vol. 8; no. 11; pp. 4650 - 4657
Main Authors Jeong, Jihong, Kim, Mideum, Shin, Hyeju, Lee, Hosik, Cho, Yoon-Gyo, Cho, Minjae, Lee, Jisu, Han, Cheolhee, Kim, Gunyoung, Lee, Hongkyung, Lee, Hochun, Kim, Tae-Hee, Jung, Seo-Hyun, Song, Hyun-Kon
Format Journal Article
LanguageEnglish
Published American Chemical Society 10.11.2023
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Summary:Herein, we present a gel polymer electrolyte (GPE) improving nonflammability of lithium-ion batteries (LIBs) by blocking radical-initiated chain reactions which cause thermal runaway and finally fire issues. The polymer that makes up the nonflammable GPE was (1) soluble in carbonate electrolytes, (2) cross-linkable in the presence of a popularly used lithium salt such as LiPF6, (3) gelated only with 2 wt % in electrolytes, and (4) radical-scavenging by its functional side chains. Electrolytes having the polymer were thermally gelated within battery cells after the cells were assembled by a conventional way. LIB cells with the GPE were durable against external thermal and mechanical shocks without sacrificing cell performances. The high transference number of lithium ions and liquid-equivalent ionic conductivity of the GPE at only 2% solid content having a stable solid-electrolyte interphase layer formed even improved cell performances at normal operation conditions.
ISSN:2380-8195
2380-8195
DOI:10.1021/acsenergylett.3c01128