Limiting Current Density in Ionic Liquid Electrolyte for Lithium Batteries

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  • TACHIKAWA Naoki
    Department of Chemistry and Biotechnology, Yokohama National University
  • PARK Jun-Woo
    Department of Chemistry and Biotechnology, Yokohama National University
  • YOSHIDA Kazuki
    Department of Chemistry and Biotechnology, Yokohama National University
  • TAMURA Takashi
    Department of Chemistry and Biotechnology, Yokohama National University
  • DOKKO Kaoru
    Department of Chemistry and Biotechnology, Yokohama National University
  • WATANABE Masayoshi
    Department of Chemistry and Biotechnology, Yokohama National University

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The relationship between Li(I) transport property and the limiting current density was investigated in N-methyl-N-propylpyrrolidinium bis(trifluoromethylsulfonyl)amide (P13TFSA) at 30°C. The limiting current density in a LiTFSA/P13TFSA binary ionic liquid electrolyte was evaluated by chronoamperometry for a symmetric cell of Li|ionic liquid|Li, where the ionic liquid was incorporated in a porous polyethylene separator that was sandwiched between two Li electrodes. The diffusion process of Li(I) in the ionic liquid dominates the limiting current density in the cell. In addition to the Li(I) transport property of the electrolyte, the porosity and tortuosity of the separator has a significant effect on the limiting current density.

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  • Electrochemistry

    Electrochemistry 78 (5), 349-352, 2010

    公益社団法人　電気化学会

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