公开(公告)号：US20210175507A1

公开(公告)日：2021-06-10

申请号：US17178286

申请日：2021-02-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

公开(公告)号：US20200259179A1

公开(公告)日：2020-08-13

申请号：US16862651

申请日：2020-04-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei OGUNI ,  Takeshi OSADA ,  Toshihiko TAKEUCHI ,  Kuniharu NOMOTO

IPC: H01M4/587 ,  B82Y40/00 ,  H01M4/133 ,  C25D5/50 ,  C25D5/48 ,  C25D13/12 ,  H01M4/04 ,  C25D13/02 ,  B82Y30/00 ,  H01M4/70 ,  H01M4/66 ,  H01M4/1393

Abstract: Graphene is formed with a practically uniform thickness on an uneven object. The object is immersed in a graphene oxide solution, and then taken out of the solution and dried; alternatively, the object and an electrode are immersed therein and voltage is applied between the electrode and the object used as an anode. Graphene oxide is negatively charged, and thus is drawn to and deposited on a surface of the object, with a practically uniform thickness. After that, the object is heated in vacuum or a reducing atmosphere, so that the graphene oxide is reduced to be graphene. In this manner, a graphene layer with a practically uniform thickness can be formed even on a surface of the uneven object.

公开(公告)号：US20240030436A1

公开(公告)日：2024-01-25

申请号：US18373510

申请日：2023-09-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Junpei MOMO

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

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

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：US20230352687A1

公开(公告)日：2023-11-02

申请号：US18219951

申请日：2023-07-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei OGUNI ,  Takeshi OSADA ,  Toshihiko TAKEUCHI ,  Kuniharu NOMOTO

IPC: H01M4/587 ,  B82Y40/00 ,  C25D5/48 ,  C25D5/50 ,  C25D13/02 ,  C25D13/12 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/66 ,  H01M4/70 ,  B82Y30/00

CPC classification number: H01M4/587 ,  B82Y40/00 ,  C25D5/48 ,  C25D5/50 ,  C25D13/02 ,  C25D13/12 ,  H01M4/0452 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/66 ,  H01M4/70 ,  B82Y30/00 ,  Y10T428/24355 ,  Y02E60/10

Abstract: Graphene is formed with a practically uniform thickness on an uneven object. The object is immersed in a graphene oxide solution, and then taken out of the solution and dried; alternatively, the object and an electrode are immersed therein and voltage is applied between the electrode and the object used as an anode. Graphene oxide is negatively charged, and thus is drawn to and deposited on a surface of the object, with a practically uniform thickness. After that, the object is heated in vacuum or a reducing atmosphere, so that the graphene oxide is reduced to be graphene. In this manner, a graphene layer with a practically uniform thickness can be formed even on a surface of the uneven object.

公开(公告)号：US20220199998A1

公开(公告)日：2022-06-23

申请号：US17692502

申请日：2022-03-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Junpei MOMO

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

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：US20190245206A1

公开(公告)日：2019-08-08

申请号：US16388904

申请日：2019-04-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Junpei MOMO

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

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

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：US20170133673A1

公开(公告)日：2017-05-11

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: H01M4/36 ,  H01M4/62 ,  C01B25/30 ,  C30B29/14 ,  C30B7/10 ,  C01B25/45 ,  H01M4/485 ,  H01M10/0525

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：US20160047060A1

公开(公告)日：2016-02-18

申请号：US14923798

申请日：2015-10-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Nobuhiro INOUE ,  Kuniharu NOMOTO ,  Junpei MOMO

IPC: C30B29/14 ,  H01M4/1397 ,  H01M4/04

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：US20150064565A1

公开(公告)日：2015-03-05

申请号：US14507872

申请日：2014-10-07

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroatsu TODORIKI ,  Yumiko SAITO ,  Takahiro KAWAKAMI ,  Kuniharu NOMOTO ,  Mikio YUKAWA

IPC: H01M4/583 ,  H01M4/133 ,  H01G11/36 ,  C01B31/04

Abstract: The formation method of graphene includes the steps of forming a layer including graphene oxide over a first conductive layer; and supplying a potential at which the reduction reaction of the graphene oxide occurs to the first conductive layer in an electrolyte where the first conductive layer as a working electrode and a second conductive layer with a as a counter electrode are immersed. A manufacturing method of a power storage device including at least a positive electrode, a negative electrode, an electrolyte, and a separator includes a step of forming graphene for an active material layer of one of or both the positive electrode and the negative electrode by the formation method.

Abstract translation: 石墨烯的形成方法包括在第一导电层上形成包括氧化石墨烯的层的步骤; 并且在其中浸入作为工作电极的第一导电层和作为对电极的第二导电层的电解质中，提供氧化石墨烯的还原反应发生到第一导电层的电位。 至少包括正电极，负极，电解质和隔膜的蓄电装置的制造方法包括通过所述正极和负极中的一个或两个的活性物质层形成石墨烯的步骤 形成方法。

公开(公告)号：US20130164619A1

公开(公告)日：2013-06-27

申请号：US13724427

申请日：2012-12-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/134

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/622

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

Abstract translation: 正极活性物质层包含多个正极活性物质的粒子和氧化还原性氧化物与作为侧链的官能团的聚合物结合的反应混合物。 还原型石墨烯氧化物具有片状形状和高导电性，因此通过与正极活性物质的多个颗粒接触而用作导电添加剂。 反应混合物用作优异的粘合剂，因为还原的氧化石墨烯结合到聚合物上。 因此，即使少量的还原型石墨烯氧化物与聚合物共价键合的反应混合物也极好地用作导电添加剂和粘合剂。