公开(公告)号：US11322746B2

公开(公告)日：2022-05-03

申请号：US16936566

申请日：2020-07-23

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Teruaki Ochiai ,  Takahiro Kawakami ,  Takuya Miwa

IPC: H01M4/00 ,  H01M4/66 ,  H01M4/131 ,  H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01G11/50 ,  H01G11/36 ,  H01G11/86 ,  H01G11/38 ,  H01M10/0525

Abstract: A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.

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：US10985369B2

公开(公告)日：2021-04-20

申请号：US16893726

申请日：2020-06-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Yumiko Yoneda ,  Teppei Oguni

IPC: H01M4/58 ,  C01B25/45 ,  H01M4/02 ,  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.

公开(公告)号：US10219395B2

公开(公告)日：2019-02-26

申请号：US14555644

申请日：2014-11-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M10/058 ,  H05K5/00 ,  H01M2/02 ,  H01M2/16 ,  H01M2/18 ,  H01M10/04 ,  H01M2/06 ,  H01M2/26 ,  H01M4/58 ,  H01M10/052 ,  H01M10/0585

Abstract: To provide a power storage unit having a structure which is unlikely to break down by change in shape, such as bending. An electrode plate is covered with a sheet of an insulator which is folded in two. The sheet is preferably processed into a bag-like shape or an envelope-like shape by bonding overlapping portions of the sheet in the periphery of the electrode plate. The electrode plate and the sheet are fixed to an exterior body. In the case where the shape of the exterior body is changed by bending or the like, the electrode plate and the sheet can slide together in the exterior body. Thus, stress on the electrode plate due to bending can be relieved.

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：US11799084B2

公开(公告)日：2023-10-24

申请号：US17692502

申请日：2022-03-11

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

CPC classification number: H01M4/5825 ,  C01D15/02 ,  C01G45/006 ,  C01G49/009 ,  C01G51/006 ,  C01G53/006 ,  C30B7/10 ,  H01M4/364 ,  H01M4/587 ,  C30B29/14 ,  H01M2004/028 ,  H01M2220/30

Abstract: A hydrothermal synthesis for LiFePO4 is provided. First, each raw material solution is prepared using a degassed water in advance, second, those solution are mixed by dripping in a fixed order, and then those materials are reacted in a hydrothermal synthesis, so that LiFePO4 is obtained in a predesigned form.

公开(公告)号：US11626637B2

公开(公告)日：2023-04-11

申请号：US16783205

申请日：2020-02-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru Takahashi ,  Yuugo Goto ,  Yumiko Yoneda ,  Takuya Miwa ,  Ryota Tajima

IPC: H01M50/116 ,  H01M10/04 ,  H01M50/543 ,  H01M50/124

Abstract: In the case where a film, which has lower strength than a metal can, is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery which is resistant to external force is obtained. An opening is provided in a central portion of the secondary battery; and a terminal is formed in the opening. An outer edge of the secondary battery is fixed by thermocompression bonding. In addition, the central portion of the secondary battery is fixed by thermocompression bonding, so that the amount of bending is limited even when the outer edge portion of the secondary battery is bent.

公开(公告)号：US11233266B2

公开(公告)日：2022-01-25

申请号：US16787105

申请日：2020-02-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru Takahashi ,  Ryota Tajima ,  Takuya Miwa ,  Yuugo Goto

IPC: H01M10/04 ,  H01M50/463 ,  H01M10/42 ,  H01M50/10

Abstract: In the case where a film, which has lower strength than a metal can, is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery that is durable even when force is externally applied thereto is provided. A cushioning material is provided in a region surrounded by an exterior body of a secondary battery. Specifically, a cushioning material is provided on the periphery of a current collector such that a sealing portion of an exterior body (film) is located outside the cushioning material.

公开(公告)号：US11088363B2

公开(公告)日：2021-08-10

申请号：US15446041

申请日：2017-03-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takuya Miwa

IPC: H01M4/136 ,  C01B25/45 ,  H01M4/36 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

Abstract: A lithium-ion secondary battery including a lithium-containing complex phosphate as a positive electrode active material is provided. Furthermore, a positive electrode active material with high diffusion rate of lithium ions is provided to provide a lithium-ion secondary battery with high output. A positive electrode active material of a lithium-ion secondary battery includes a first plate-like component and a second plate-like component, a third prismatic component between the first component and the second component, and a space between the first component and the second component.