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    Method for manufacturing positive electrode active material, and lithium ion battery
    11.
    发明授权
    Method for manufacturing positive electrode active material, and lithium ion battery 有权

    公开(公告)号：US11936043B2

    公开(公告)日：2024-03-19

    申请号：US17224229

    申请日：2021-04-07

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Takuya Miwa ,  Yumiko Yoneda ,  Teppei Oguni

    IPC: H01M4/58 ,  C01B25/45 ,  H01M4/02 ,  H01M10/0525

    CPC classification number: H01M4/5825 ,  C01B25/45 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/40 ,  H01M2004/028 ,  H01M10/0525

    Abstract: A composite oxide with high diffusion rate of lithium is provided. Alternatively, a lithium-containing complex phosphate with high diffusion rate of lithium is provided. Alternatively, a positive electrode active material with high diffusion rate of lithium is provided. Alternatively, a lithium ion battery with high output is provided. Alternatively, a lithium ion battery that can be manufactured at low cost is provided. A positive electrode active material is formed through a first step of mixing a lithium compound, a phosphorus compound, and water, a second step of adjusting pH by adding a first aqueous solution to a first mixed solution formed in the first step, a third step of mixing an iron compound with a second mixed solution formed in the second step, a fourth step of performing heat treatment under a pressure more than or equal to 0.1 MPa and less than or equal to 2 MPa at a highest temperature more than 100° C. and less than or equal to 119° C. on a third mixed solution formed in the third step with a pH of more than or equal to 3.5 and less than or equal to 5.0.

    Secondary battery and electronic device including the same
    14.
    发明授权
    Secondary battery and electronic device including the same 有权

    公开(公告)号：US10122010B2

    公开(公告)日：2018-11-06

    申请号：US14751443

    申请日：2015-06-26

    Applicant: Semiconductor Energy Laboratory Co., LTD.

    Inventor： Ryota Tajima ,  Yuugo Goto ,  Yumiko Yoneda ,  Junya Goto ,  Takuya Miwa ,  Masaaki Hiroki

    IPC: H01M4/13 ,  H01M4/139 ,  H01M10/0525 ,  H01M2/02 ,  H01M4/02

    Abstract: An electronic device having a novel structure, specifically, an electronic device having a novel structure that can be changed into various appearances is provided. Specifically, after an active material layer is formed on one or both surfaces of a current collector, the active material layer in a bent region is partly removed. The removed region of the active material layer can be in a linear shape, a dot shape, or a matrix shape, for example. After the active material layer is formed on one or both surfaces of the current collector, laser processing for removing part of the active material layer in an irradiation region is performed using laser light or the like. On the region where the surface of the current collector is exposed, the active material layer is not provided, and this region is a region that does not function as a battery. Owing to this region, a secondary battery with a wide movable region can be achieved.

    Method of manufacturing positive electrode active material for lithium ion battery
    17.
    发明授权
    Method of manufacturing positive electrode active material for lithium ion battery 有权
    锂离子电池用正极活性物质的制造方法

    公开(公告)号：US08685570B2

    公开(公告)日：2014-04-01

    申请号：US13923428

    申请日：2013-06-21

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Nobuhiro Inoue

    IPC: H01M4/13 ,  H01M4/88

    CPC classification number: H01G9/042 ,  B82Y30/00 ,  H01M4/5825 ,  H01M4/622 ,  H01M4/625 ,  H01M10/04 ,  Y10T29/417 ,  Y10T29/49115

    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.

    Abstract translation: 含有锂的水溶液A，含有铁，锰，钴或镍的水溶液B和含有磷酸的水溶液C中的至少一种包括氧化石墨烯。 将水溶液A滴入水溶液C中，制备包含析出物D的混合溶液E。 将混合溶液E滴加到水溶液B中，从而制备包含沉淀物F的混合溶液G. 混合溶液G在加压气氛中进行热处理，制备混合溶液H，然后过滤混合溶液H. 因此，获得了具有小尺寸的含有锂和氧的化合物的颗粒。

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