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    Positive electrode composite material for lithium ion secondary battery and use thereof
    1.
    发明授权
    Positive electrode composite material for lithium ion secondary battery and use thereof 有权

    公开(公告)号：US11108042B2

    公开(公告)日：2021-08-31

    申请号：US16484697

    申请日：2018-02-08

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  SUMITOMO METAL MINING CO., LTD. ,  Daisuke Horikawa ,  Ryuta Sugiura ,  Taira Aida ,  Satoshi Kanada

    发明人： Daisuke Horikawa ,  Ryuta Sugiura ,  Taira Aida ,  Satoshi Kanada

    IPC分类号： H01M4/525 ,  H01M4/505 ,  H01M4/02

    摘要： A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.3 nm, and in cross-sectional TEM observation of the film-shaped region, no particles with a particle diameter equal to or greater than 0.3 nm are observed, and there are no voids equal to or greater than 2 nm.

    POSITIVE ELECTRODE COMPOSITE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND USE THEREOF
    5.
    发明申请
    POSITIVE ELECTRODE COMPOSITE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND USE THEREOF 审中-公开

    公开(公告)号：US20200058936A1

    公开(公告)日：2020-02-20

    申请号：US16484697

    申请日：2018-02-08

    申请人： Daisuke HORIKAWA ,  Ryuta SUGIURA ,  Taira AIDA ,  Satoshi KANADA ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  SUMITOMO METAL MINING CO., LTD.

    发明人： Daisuke HORIKAWA ,  Ryuta SUGIURA ,  Taira AIDA ,  Satoshi KANADA

    IPC分类号： H01M4/525 ,  H01M4/505

    摘要： A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.3 nm, and in cross-sectional TEM observation of the film-shaped region, no particles with a particle diameter equal to or greater than 0.3 nm are observed, and there are no voids equal to or greater than 2 nm.