COVERED POSITIVE ELECTRODE ACTIVE MATERIAL AND BATTERY USING THE SAME

    公开(公告)号:US20230002244A1

    公开(公告)日:2023-01-05

    申请号:US17942188

    申请日:2022-09-12

    Abstract: A covered positive electrode active material includes a particulate positive electrode active material and a solid electrolyte that covers a surface of the positive electrode active material. The solid electrolyte forms a covering layer. The covering layer is formed such that recessed portions of the surface of the positive electrode active material are filled with the solid electrolyte. Protruding portions of the surface of the positive electrode active material are exposed on a surface of the covered positive electrode active material. A degree of unevenness of a group of particles of the positive electrode active material is defined as ζ1, a degree of unevenness of a group of particles of the covered positive electrode active material is defined as ζ2, and a degree of change in unevenness R defined by formula (2) below is greater than or equal to 1.1. R=ζ2/ζ1   (2)

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