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    Secondary battery
    41.
    发明授权
    Secondary battery 有权

    公开(公告)号：US10553854B2

    公开(公告)日：2020-02-04

    申请号：US14494898

    申请日：2014-09-24

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Nobuhiro Inoue ,  Ryota Tajima ,  Naoki Kurihara ,  Junpei Momo

    IPC: H01M4/134 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/66 ,  H01M10/052 ,  H01M2/10 ,  H01M10/42 ,  H01M10/48

    Abstract: An object of one embodiment of the present invention is to provide a secondary battery in which deterioration of charge-discharge cycle characteristics is suppressed, to suppress generation of defects caused by expansion and contraction of an active material in a negative electrode, or to prevent deterioration caused by deformation of a secondary battery. To prevent deterioration, a material that can be alloyed with lithium and fluidified easily is used for a negative electrode. To hold a negative electrode active material over a surface of a current collector, a covering layer that covers the negative electrode active material is provided. Furthermore, a portion where the current collector and the negative electrode active material are in contact with each other is alloyed. In other words, an alloy that is in contact with both the current collector and the negative electrode active material is provided in the negative electrode.

    Method of manufacturing positive electrode active material for lithium ion battery
    42.
    发明授权
    Method of manufacturing positive electrode active material for lithium ion battery 有权

    公开(公告)号：US10096428B2

    公开(公告)日：2018-10-09

    申请号：US15622995

    申请日：2017-06-14

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Nobuhiro Inoue

    IPC: H01G9/042 ,  H01M10/04 ,  H01M4/58 ,  H01M4/62 ,  B82Y30/00

    Abstract: At least one of an aqueous solution A containing lithium, an aqueous solution B containing iron, manganese, cobalt, or nickel, and an aqueous solution C containing a phosphoric acid includes graphene oxide. The aqueous solution A is dripped into the aqueous solution C, so that a mixed solution E including a precipitate D is prepared. The mixed solution E is dripped into the aqueous solution B, so that a mixed solution G including a precipitate F is prepared. The mixed solution G is subjected to heat treatment in a pressurized atmosphere, so that a mixed solution H is prepared, and the mixed solution H is then filtered. Thus, particles of a compound containing lithium and oxygen which have a small size are obtained.

    NEGATIVE ELECTRODE FOR POWER STORAGE DEVICE AND POWER STORAGE DEVICE
    46.
    发明申请
    NEGATIVE ELECTRODE FOR POWER STORAGE DEVICE AND POWER STORAGE DEVICE 有权
    用于蓄电装置和蓄电装置的负极

    公开(公告)号：US20130323585A1

    公开(公告)日：2013-12-05

    申请号：US13898509

    申请日：2013-05-21

    Applicant: Semiconductor Energy Laboratory CO., LTD.

    Inventor： Nobuhiro Inoue ,  Kai Kimura ,  Sachiko Kataniwa ,  Ryota Tajima

    IPC: H01G11/68 ,  H01M4/1393 ,  H01M4/62

    CPC classification number: H01M4/131 ,  H01G11/06 ,  H01G11/28 ,  H01G11/46 ,  H01G11/50 ,  H01G11/58 ,  H01G11/66 ,  H01G11/68 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/362 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M4/62 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/122 ,  Y02E60/13 ,  Y02P70/54 ,  Y02T10/7022

    Abstract: A decomposition reaction of an electrolyte solution and the like caused as a side reaction of charge and discharge is minimized in repeated charge and discharge of a lithium ion battery or a lithium ion capacitor, and thus the lithium ion battery or the lithium ion capacitor can have long-term cycle performance. A negative electrode for a power storage device includes a negative electrode current collector and a negative electrode active material layer which includes a plurality of particles of a negative electrode active material. Each of the particles of the negative electrode active material has an inorganic compound film containing a first inorganic compound on part of its surface. The negative electrode active material layer has a film in contact with an exposed part of the negative electrode active material and part of the inorganic compound film. The film contains an organic compound and a second inorganic compound.

    Abstract translation: 在锂离子电池或锂离子电容器的重复充放电中，作为充放电的副反应引起的电解液等的分解反应最小化，锂离子电池或锂离子电容器可以具有 长期循环性能。 蓄电装置的负极包括负极集电体和负极活性物质层，该负极活性物质层包含多个负极活性物质的粒子。 负极活性物质的每个颗粒在其表面的一部分上具有含有第一无机化合物的无机化合物膜。 负极活性物质层具有与负极活性物质的露出部分和无机化合物膜的一部分接触的膜。 该膜含有有机化合物和第二无机化合物。

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