Fabrication of the oriented LiCoO2 sheet using a strong magnetic field

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  • YAMADA Hideto
    Graduate School of Pure and Applied Sciences, University of Tsukuba Advanced Materials Processing Unit, National Institute for Materials Science NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility
  • SUZUKI Tohru S.
    Advanced Materials Processing Unit, National Institute for Materials Science NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility
  • UCHIKOSHI Tetsuo
    Advanced Materials Processing Unit, National Institute for Materials Science NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility
  • HOZUMI Masato
    Higashifuji Technical Center, Toyota Motor Corporation NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility
  • KOHAMA Keiichi
    Higashifuji Technical Center, Toyota Motor Corporation NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility
  • SAKKA Yoshio
    Advanced Materials Processing Unit, National Institute for Materials Science Graduate School of Pure and Applied Sciences, University of Tsukuba NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility

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Abstract

LiCoO2 is a popular positive electrode material for Li-ion secondary batteries. The perpendicular alignment of the interlayer of the LiCoO2 lattice on the electrode contributes to easy access of Li-ions. In this study, we report the preparation of an oriented LiCoO2 sheet using the conventional coating method followed by drying in a maximum 12 T strong magnetic field. We discuss the effect of the particle shape and viscosity of the paste on the degree of orientation. As a result, when the sheets are dried in a strong horizontal magnetic field, the electrochemical active planes of the LiCoO2 are aligned perpendicular to the sheet surface.

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