Electrochemical Properties of a TetraPEG-based Gel Electrolyte Containing a Nonflammable Fluorinated Alkyl Phosphate for Safer Lithium-ion Batteries

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Author(s)

    • Han Jihae
    • Graduate School of Sciences and Technology for Innovation, Yamaguchi University
    • Yoshitake Mari
    • Graduate School of Sciences and Technology for Innovation, Yamaguchi University
    • Sakai Takamasa
    • Department of Bioengineering, School of Engineering, The University of Tokyo
    • Yoshimoto Nobuko
    • Graduate School of Sciences and Technology for Innovation, Yamaguchi University
    • Morita Masayuki
    • Graduate School of Sciences and Technology for Innovation, Yamaguchi University
    • Fujii Kenta
    • Graduate School of Sciences and Technology for Innovation, Yamaguchi University

Abstract

<p>We report a nonflammable gel electrolyte based on two key soft materials: 1) a homogeneous polymer network prepared from tetra-armed poly(ethylene glycol) (TetraPEG) and 2) a tris(2,2,2-trifluoroethyl)phosphate (TFEP)-based electrolyte solution. At the equilibrium swelling state, the concentration of the polymer in the TetraPEG gel was relatively low, at only 5.6 wt.%. The TetraPEG gel exhibits a wide electrochemical window of ∼5.0 V and thus works well as an electrolyte for a positive electrode, i.e., a lithium iron phosphate (LiFePO<sub>4</sub>).</p>

Journal

  • Chemistry Letters

    Chemistry Letters 47(7), 909-912, 2018

    The Chemical Society of Japan

Codes

  • NII Article ID (NAID)
    130007402817
  • Text Lang
    ENG
  • ISSN
    0366-7022
  • Data Source
    J-STAGE 
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