Effect of dimethallyl carbonate addition on thermal stability of lithium ion batteries

Takefumi Okumura, Shin Nishimura

    研究成果: ジャーナルへの寄稿学術誌査読

    2 被引用数 (Scopus)

    抄録

    The role of dimethallyl carbonate (DMAC), which has a multiple functional group, as an additive in electrolyte have been studied for improving thermal stability of lithium ion batteries (LIB). During the initial charging of the negative electrode with an electrolyte that contains the DMAC additive, film formation occurs near 1 V vs. Li/Li+. Furthermore, increases in the amount of DMAC additive are accompanied by increases in the height of the dq/dV peaks and film formation progresses. The time-of-flight secondary ion mass spectrometry (TOF-SIMS) results show that increasing the amount of DMAC additive promotes the formation of aliphatic hydrocarbons of C5 or more in the Solid-Electrolyte-Interfase (SEI) and polymerization proceeds. The temperature programmed desorption mass spectrometry (TPD-MS) results show that the DMAC additive raises the peak temperature for CO2 generation to 100C or higher. The DMAC additive suppresses self discharge of LIB and suppresses the increase in direct current resistance (DCR) after storage at 50C.

    本文言語英語
    ページ(範囲)A802-A808
    ジャーナルJournal of the Electrochemical Society
    165
    5
    DOI
    出版ステータス出版済み - 1月 1 2018

    !!!All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • 再生可能エネルギー、持続可能性、環境
    • 表面、皮膜および薄膜
    • 電気化学
    • 材料化学

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