公开(公告)号：US11283075B2

公开(公告)日：2022-03-22

申请号：US16388904

申请日：2019-04-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Junpei Momo

IPC: H01M4/00 ,  H01M4/58 ,  C01D15/02 ,  C01G45/00 ,  C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  C30B7/10 ,  H01M4/36 ,  H01M4/587 ,  C30B29/14 ,  H01M4/02

Abstract: An object is to reduce variation in shape of crystals that are to be formed. Solutions containing respective raw materials are made in an environment where an oxygen concentration is lower than that in air, the solutions containing the respective raw materials are mixed in an environment where an oxygen concentration is lower than that in air to form a mixture solution, and with use of the mixture solution, a composite oxide is formed by a hydrothermal method.

公开(公告)号：US09935313B2

公开(公告)日：2018-04-03

申请号：US15409566

申请日：2017-01-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Nobuhiro Inoue ,  Kuniharu Nomoto ,  Junpei Momo

IPC: H01M4/485 ,  H01M4/36 ,  H01M4/04 ,  H01M4/583 ,  C01B25/30 ,  C01B25/45 ,  C30B29/14 ,  H01M4/1397 ,  C30B7/10 ,  H01M4/62 ,  H01M10/0525 ,  C01B32/23 ,  H01M4/02

CPC classification number: H01M4/366 ,  C01B25/306 ,  C01B25/45 ,  C01B32/23 ,  C01P2006/40 ,  C30B7/10 ,  C30B29/14 ,  H01M4/04 ,  H01M4/0404 ,  H01M4/0435 ,  H01M4/0471 ,  H01M4/1397 ,  H01M4/485 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/028 ,  Y02P70/54

Abstract: Occlusion and release of lithium ion are likely to one-dimensionally occur in the b-axis direction of a crystal in a lithium-containing composite oxide having an olivine structure. Thus, a positive electrode in which the b-axes of lithium-containing composite oxide single crystals are oriented vertically to a surface of a positive electrode current collector is provided. The lithium-containing composite oxide particles are mixed with graphene oxide and then pressure is applied thereto, whereby the rectangular parallelepiped or substantially rectangular parallelepiped particles are likely to slip. In addition, in the case where the rectangular parallelepiped or substantially rectangular parallelepiped particles whose length in the b-axis direction is shorter than those in the a-axis direction and the c-axis direction are used, when pressure is applied in one direction, the b-axes can be oriented in the one direction.

公开(公告)号：US20150123050A1

公开(公告)日：2015-05-07

申请号：US14589455

申请日：2015-01-05

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Tamae Moriwaka ,  Takuya Hirohashi ,  Kuniharu Nomoto ,  Takuya Miwa

IPC: H01M4/58 ,  H01M4/62

CPC classification number: H01M4/5825 ,  B82Y30/00 ,  H01M4/131 ,  H01M4/133 ,  H01M4/364 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M2220/30 ,  Y02T10/7011

Abstract: A positive-electrode active material with improved electrical conductivity, and a power storage device using the material are provided. A positive-electrode active material with large capacity, and a power storage device using the material are provided. A core including lithium metal oxide is used as a core of a main material of the positive-electrode active material, and one to ten pieces of graphene is used as a covering layer for the core. A hole is provided for graphene, whereby transmission of a lithium ion is facilitated, resulting in improvement of use efficiency of current.

Abstract translation: 提供导电性提高的正极活性物质和使用该材料的蓄电装置。 提供具有大容量的正极活性物质和使用该材料的蓄电装置。 使用包含锂金属氧化物的芯作为正极活性材料的主要材料的芯，并且使用一至十个石墨烯作为芯的覆盖层。 为石墨烯提供了一个孔，从而促进了锂离子的传输，从而提高了电流的使用效率。

公开(公告)号：US20140166946A1

公开(公告)日：2014-06-19

申请号：US14178535

申请日：2014-02-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu Nomoto ,  Nobuhiro Inoue

IPC: H01M4/62

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。