Novel silane-treated polyacrylonitrile as a promising negative electrode binder for LIBs

Nurzhan Umirov, Seongjun Moon, Gyori Park, Hyang Yeon Kim, Kyung Jin Lee, Sung Soo Kim

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    With the rapid increment of the electric vehicle market, silicon has attracted tremendous attention as a promising anode material for lithium-ion batteries (LIB) due to its tenfold higher gravimetrical energy density compared with a traditional graphite anode. To eliminate the well-known poor cycle life issue originated from the large volume expansion of the silicon-based electrode, the development of novel polymeric binder is essential. Herein, we synthesized a novel silane-treated polyacrylonitrile (Si-PAN) as an anode binder using facile azide-nitrile click reaction. Incorporation of silane to the cyclized-PAN structure enhances affinity between the electrode components and a current collector because it has organic and inorganic moiety simultaneously in polymeric backbone. This work implements a Si-alloy (Si70Ni20Cu10) based electrode with improved capacity retention through the optimization of silane amount and thermal treatment condition. Namely, the electrode composing Si-treated PAN-2.0 binder and Si-alloy, after being thermally treated at 450 °C shows stable discharge capacity of 760 mA h g−1 upon 50 cycles, resulting in 46% capacity retention improvement against pristine PAN binder (at 450 °C). New binder demonstrates a great potential to improve the electrochemical properties of next-generation electrode materials for energy storage systems.

    Original languageEnglish
    Article number152481
    JournalJournal of Alloys and Compounds
    Volume815
    DOIs
    Publication statusPublished - Jan 30 2020

    Keywords

    • Lithium-ion batteries
    • Negative electrode
    • Polyacrylonitrile binder
    • Silicon alloy

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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