公开(公告)号：US20210313555A1

公开(公告)日：2021-10-07

申请号：US17350248

申请日：2021-06-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Kazutaka KURIKI

IPC: H01M4/13 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M10/42 ,  H01M4/36

Abstract: To provide a highly reliable power storage device. To provide a long-life power storage device. To provide a power storage device electrode having high adhesion with a current collector. To reduce or inhibit electrochemical decomposition of an electrolytic solution or the like on a surface of an electrode. The power storage device electrode includes a current collector and a second electrode layer provided over the current collector and including a second binder and an active material. A first electrode layer including a first binder and conductive particles is provided between the current collector and the second electrode layer. At least part of a surface of the active material is provided with a coating film, and the coating film is porous.

公开(公告)号：US20180198130A1

公开(公告)日：2018-07-12

申请号：US15914612

申请日：2018-03-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Takahiro KAWAKAMI ,  Yohei MOMMA ,  Teruaki OCHIAI

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/139 ,  H01M10/052

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/139 ,  H01M4/621 ,  H01M4/623 ,  H01M10/052 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54

Abstract: In manufacture of a storage battery electrode containing graphene as a conductive additive, the efficiency of reduction of graphene oxide under mild conditions is increased, and cycle characteristics and rate characteristics of a storage battery are improved. Provided is a manufacturing method of a storage battery electrode. In the manufacturing method, a first mixture containing an active material, graphene oxide, and a solvent is formed; a reducing agent is added to the first mixture and the graphene oxide is reduced to form a second mixture; a binder is mixed with the second mixture to form a third mixture; and the third mixture is applied to a current collector and the solvent is evaporated to form an active material layer.

公开(公告)号：US20170062819A1

公开(公告)日：2017-03-02

申请号：US15247175

申请日：2016-08-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/04 ,  H01M4/62 ,  H01M4/1391 ,  H01M10/0525 ,  H01M4/525

CPC classification number: H01M4/505 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54

Abstract: As a positive electrode active material of a secondary battery, a lithium-manganese composite oxide containing lithium, manganese, and an element represented by M, and oxygen is used, and the lithium-manganese composite oxide is covered with reduced graphene oxide. An active material layer including the active material, graphene oxide, a conductive additive, and a binder is formed and soaked in alcohol, and then heat treatment is performed, whereby an electrode with reduced graphene oxide is fabricated.

Abstract translation: 作为二次电池的正极活性物质，使用含有锂，锰和由M表示的元素的锂 - 锰复合氧化物和氧，并且还原石墨烯氧化物覆盖锂锰复合氧化物。 形成含有活性物质，石墨烯氧化物，导电性添加剂和粘合剂的活性物质层，并浸渍在醇中，然后进行热处理，由此制造具有还原性氧化石墨烯的电极。

公开(公告)号：US20150166348A1

公开(公告)日：2015-06-18

申请号：US14566954

申请日：2014-12-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Mikio YUKAWA

IPC: C01B31/04 ,  H01M4/58 ,  H01M4/04 ,  H01M4/1393 ,  H01G11/06 ,  H01G11/32 ,  H01G11/86 ,  H01M4/62 ,  H01M6/00

CPC classification number: H01G11/32 ,  C01B32/182 ,  C01B32/184 ,  H01G11/06 ,  H01G11/34 ,  H01G11/50 ,  H01M2/0207 ,  H01M2/0275 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/049 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2002/0205 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02E60/13 ,  Y02P70/54

Abstract: Graphene that is formed from graphene oxide and has high conductivity and a method for forming the graphene are provided. A power storage device with high charge discharge capacity and favorable electric properties such as high reliability and high durability and a method for fabricating the power storage device are provided. Chemical reduction and thermal reduction are performed on graphene oxide in this order to form graphene. In the method for fabricating the power storage device including at least a positive electrode, a negative electrode, an electrolytic solution, and a separator, graphene of one or both of a positive electrode and a negative electrode is formed by the forming method of graphene.

Abstract translation: 提供由石墨烯氧化物形成并具有高导电性的石墨烯和形成石墨烯的方法。 提供具有高充电放电容量和良好的电性能如高可靠性和高耐久性的蓄电装置和制造蓄电装置的方法。 以氧化石墨烯依次进行化学还原和热还原以形成石墨烯。 在至少包括正极，负极，电解液和隔板的蓄电装置的制造方法中，通过石墨烯的形成方法形成正极和负极中的一个或两个的石墨烯。

公开(公告)号：US20230197921A1

公开(公告)日：2023-06-22

申请号：US18085682

申请日：2022-12-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takahiro KAWAKAMI ,  Yohei MOMMA ,  Teruaki OCHIAI ,  Tatsuya IKENUMA

IPC: H01M4/04 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62

CPC classification number: H01M4/0404 ,  H01M4/13 ,  H01M4/0471 ,  H01M4/139 ,  H01M4/625 ,  H01M2220/30

Abstract: In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided. As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.

公开(公告)号：US20220158169A1

公开(公告)日：2022-05-19

申请号：US17588556

申请日：2022-01-31

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Yumiko YONEDA (Former: SAITO)

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/62 ,  C01B32/184

Abstract: To provide graphene oxide that has high dispersibility and is easily reduced. To provide graphene with high electron conductivity. To provide a storage battery electrode including an active material layer with high electric conductivity and a manufacturing method thereof. To provide a storage battery with increased discharge capacity. A method for manufacturing a storage battery electrode that is to be provided includes a step of dispersing graphene oxide into a solution containing alcohol or acid, a step of heating the graphene oxide dispersed into the solution, and a step or reducing the graphene oxide.

公开(公告)号：US20170317346A1

公开(公告)日：2017-11-02

申请号：US15649179

申请日：2017-07-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Shuhei YOSHITOMI ,  Takahiro KAWAKAMI ,  Yumiko YONEDA ,  Yohei MOMMA

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/04 ,  H01M4/505 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  Y02T10/7011

Abstract: To increase the volume density or weight density of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese composite oxide represented by LixMnyMzOw that includes a region belonging to a space group C2/c and is covered with a carbon-containing layer is used as the positive electrode active material. The element M is an element other than lithium and manganese. The lithium manganese composite oxide has high structural stability and high capacity.

公开(公告)号：US20150111101A1

公开(公告)日：2015-04-23

申请号：US14517994

申请日：2014-10-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Kazutaka KURIKI

IPC: H01M4/13 ,  H01M10/058 ,  H01M4/139 ,  H01M10/052 ,  H01M4/04

CPC classification number: H01M4/13 ,  H01M4/0404 ,  H01M4/139 ,  H01M4/366 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/4235

Abstract: To provide a highly reliable power storage device. To provide a long-life power storage device. To provide a power storage device electrode having high adhesion with a current collector. To reduce or inhibit electrochemical decomposition of an electrolytic solution or the like on a surface of an electrode. The power storage device electrode includes a current collector and a second electrode layer provided over the current collector and including a second binder and an active material. A first electrode layer including a first binder and conductive particles is provided between the current collector and the second electrode layer. At least part of a surface of the active material is provided with a coating film, and the coating film is porous.

Abstract translation: 提供高可靠性的蓄电装置。 提供长寿命蓄电装置。 提供与集电体具有高粘合力的蓄电装置电极。 为了减少或抑制在电极表面上的电解液等的电化学分解。 蓄电装置电极包括集电体和设置在集电体上方的第二电极层，并且包括第二粘合剂和活性物质。 在集电体和第二电极层之间设置包括第一粘合剂和导电粒子的第一电极层。 活性物质的表面的至少一部分设置有涂膜，并且涂膜是多孔的。

公开(公告)号：US20220285691A1

公开(公告)日：2022-09-08

申请号：US17705425

申请日：2022-03-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Kazutaka KURIKI ,  Ai NAKAGAWA

IPC: H01M4/62 ,  H01M4/139 ,  H01M4/36 ,  H01M4/13 ,  H01G11/06 ,  H01G11/50 ,  H01G11/38

Abstract: Provided is an electrode including a current collector and an active material layer. The active material layer includes an active material, a film including silicone, a conductive additive, and a binder. The active material is in the form of a particle. The film including silicone covers at least part of the active material.

公开(公告)号：US20220115668A1

公开(公告)日：2022-04-14

申请号：US17556384

申请日：2021-12-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroatsu TODORIKI ,  Mikio YUKAWA ,  Yumiko SAITO ,  Masaki YAMAKAJI ,  Rika YATABE ,  Tatsuya IKENUMA

IPC: H01M4/62 ,  H01M4/36 ,  H01M10/052 ,  H01M4/136 ,  H01M4/58 ,  C01B32/23

Abstract: A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the atomic ratio of oxygen to carbon is greater than or equal to 0.405.