COATED ACTIVE MATERIAL, METHOD FOR PRODUCING COATED ACTIVE MATERIAL, POSITIVE ELECTRODE MATERIAL AND BATTERY

    公开(公告)号:EP4404295A1

    公开(公告)日:2024-07-24

    申请号:EP22867098.0

    申请日:2022-07-26

    发明人: FUJINOKI Norihito

    IPC分类号: H01M4/36 H01M4/525 H01M4/62

    摘要: A coated active material 100 of the present disclosure includes a positive electrode active material 11 and a coating layer 12 coating at least a portion of a surface of the positive electrode active material 11. The coating layer 12 includes a lithium-containing fluoride. When a mass M2 of lithium derived from a lithium-containing alkaline component present on the surface of the positive electrode active material 11 is measured by neutralization titration, a proportion of the mass M2 of the lithium in a mass M1 of the positive electrode active material 11 is more than 0.26% and 0.55% or less. A method for producing the coated active material 100 of the present disclosure includes: cleaning the positive electrode active material 11 with a cleaning solution including a water-soluble organic solvent so that when the mass M2 of the lithium is measured by neutralization titration, the proportion of the mass M2 of the lithium in the mass M1 of the positive electrode active material 11 is more than 0.26% and 0.55% or less; after the cleaning, drying the positive electrode active material 11; and after the drying, coating at least a portion of the surface of the positive electrode active material 11 with a coating material including a lithium-containing fluoride.

    POSITIVE ELECTRODE MATERIAL, AND BATTERY
    3.
    发明公开

    公开(公告)号:EP3933978A1

    公开(公告)日:2022-01-05

    申请号:EP19917517.5

    申请日:2019-12-26

    摘要: Regarding the related art, it has been desired that a reaction overvoltage of a battery is suppressed from increasing. A positive electrode material according to the present disclosure includes a positive electrode active material, a cover layer that covers at least part of a surface of the positive electrode active material and that contains a first solid electrolyte material, and a second solid electrolyte material that is a material different from the first solid electrolyte material. The first solid electrolyte material contains Li, M, and X and does not contain sulfur. M represents at least one element selected from the group consisting of metal elements other than Li and semi-metal elements, and X represents halogen elements including CI.