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    Solid electrolyte with low-symmetry garnet-related structure and lithium-ion secondary battery
    1.
    发明授权
    Solid electrolyte with low-symmetry garnet-related structure and lithium-ion secondary battery 有权

    公开(公告)号：US10763544B1

    公开(公告)日：2020-09-01

    申请号：US16304231

    申请日：2017-05-02

    申请人： National Institute of Advanced Industrial Science and Technology

    发明人： Naoki Hamao ,  Kunimitsu Kataoka ,  Junji Akimoto

    IPC分类号： H01M10/0562 ,  H01M10/0525 ,  C30B13/28 ,  C30B29/30 ,  C01G35/00

    摘要： A solid electrolyte material having high ion conductivity and a all-solid-state lithium-ion secondary battery using this solid electrolyte material are provided. The solid electrolyte material has a garnet-related structure crystal represented by the chemical composition Li7−x−yLa3Zr2−x−yTaxNbyO12 (0.05≤x+y≤0.2, x≥0, y≥0), which belongs to an orthorhombic system and a space group belonging to Ibca. The solid electrolyte material has lithium-ion conductivity at 25° C. of at least 1.0×10−4 S/cm. Also, in this solid electrolyte material, the lattice constants are 1.29 nm≤a≤1.32 nm, 1.26 nm≤b≤1.29 nm, and 1.29 nm≤c≤1.32 nm, and three 16f sites and one 8d site in the crystal structure are occupied by lithium-ions. The all-solid-state lithium-ion secondary battery has a positive electrode, a negative electrode, and a solid electrolyte, the solid electrolyte comprising this solid electrolyte material.