公开(公告)号：US20190221848A1

公开(公告)日：2019-07-18

申请号：US16361416

申请日：2019-03-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroatsu TODORIKI ,  Junpei MOMO ,  Teppei OGUNI ,  Nobuhiro INOUE

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/587 ,  H01M4/58 ,  H01M4/04 ,  H01M4/505 ,  H01M4/36 ,  H01M4/131

CPC classification number: H01M4/624 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M4/627 ,  H01M10/052

Abstract: To increase the conductivity and electric capacity of an electrode which includes active material particles and the like and is used in a battery, a graphene net including 1 to 100 graphene sheets is used instead of a conventionally used conduction auxiliary agent and binder. The graphene net which has a two-dimensional expansion and a three-dimensional structure is more likely to touch active material particles or another conduction auxiliary agent, thereby increasing the conductivity and the bonding strength between active material particles. This graphene net is obtained by mixing graphene oxide and active material particles and then heating the mixture in a vacuum or a reducing atmosphere.

公开(公告)号：US20130266859A1

公开(公告)日：2013-10-10

申请号：US13826710

申请日：2013-03-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO. LTD.

Inventor： Hiroatsu TODORIKI ,  Mikio Yukawa ,  Yumiko Saito ,  Masaki Yamakaji ,  Rika Yatabe ,  Tatsuya Ikenuma

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/133 ,  H01M4/64

CPC classification number: H01M4/625 ,  C01B32/23 ,  H01M4/136 ,  H01M4/364 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/624 ,  H01M10/052

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 weight ratio of oxygen to carbon is greater than or equal to 0.405.

Abstract translation: 提供了用作用于形成具有高导电性的活性材料层的导电添加剂的原料的石墨烯氧化物，其具有少量的导电添加剂。 提供了使用石墨烯氧化物作为导电添加剂的非水系二次电池用正极。 氧化石墨烯用作非水系二次电池用正极中的导电性添加剂的原料，氧化石墨烯中的氧与碳的重量比大于或等于0.405。

公开(公告)号：US20250140436A1

公开(公告)日：2025-05-01

申请号：US19003727

申请日：2024-12-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Hiroatsu TODORIKI ,  Kuniharu NOMOTO

IPC: H01B1/04 ,  C01B32/23 ,  H01G11/06 ,  H01G11/32 ,  H01G11/38 ,  H01G11/86 ,  H01M4/02 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058

Abstract: A power storage device with high output is provided, in which the specific surface area is increased while keeping the easy-to-handle particle size of its active material. The power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material layer, a negative electrode including a negative electrode current collector and a negative electrode active material layer, and an electrolyte. The negative electrode active material layer includes a negative electrode active material which is a particle in which a plurality of slices of graphite is overlapped with each other with a gap therebetween. It is preferable that the grain diameter of the particle be 1 μm to 50 μm. Further, it is preferable that the electrolyte be in contact with the gap between the slices of graphite.

公开(公告)号：US20230073850A1

公开(公告)日：2023-03-09

申请号：US17983140

申请日：2022-11-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/583 ,  H01G11/22 ,  H01M4/133 ,  H01G11/32 ,  H01M4/04 ,  H01M4/587 ,  H01M4/1393 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/23 ,  C01B32/192 ,  H01G9/042 ,  H01M4/139 ,  H01M4/62 ,  H01M6/16 ,  H01M10/0566 ,  H01G11/36

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.

公开(公告)号：US20200350585A1

公开(公告)日：2020-11-05

申请号：US16935771

申请日：2020-07-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/583 ,  H01G11/22 ,  H01M4/133 ,  H01G11/32 ,  H01M4/04 ,  H01M4/587 ,  H01M4/1393 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/23 ,  C01B32/192 ,  H01G9/042 ,  H01M4/139 ,  H01M4/62 ,  H01M6/16 ,  H01M10/0566 ,  H01G11/36

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.

公开(公告)号：US20150140429A1

公开(公告)日：2015-05-21

申请号：US14604979

申请日：2015-01-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Hiroatsu TODORIKI ,  Teppei OGUNI ,  Takeshi OSADA ,  Shunpei YAMAZAKI

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/525 ,  H01M4/52 ,  H01M4/62 ,  H01M4/505

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/483 ,  H01M4/505 ,  H01M4/523 ,  H01M4/525 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122

Abstract: A power storage device a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode active material layer. The positive electrode active material layer includes a plurality of particles of x[Li2MnO3]-(1−x)[LiCo1/3Mn1/3Ni1/3O2] (obtained by assigning 0.5 to x, for example) which is a positive electrode active material, and multilayer graphene with which the plurality of particles of the positive electrode active material are at least partly connected to each other. In the multilayer graphene, a plurality of graphenes are stacked in a layered manner. The graphene contains a six-membered ring composed of carbon atoms, a poly-membered ring which is a seven or more-membered ring composed of carbon atoms, and an oxygen atom bonded to one or more of the carbon atoms in the six-membered ring and the poly-membered ring, which is a seven or more-membered ring.

Abstract translation: 蓄电装置，包括正极活性物质层和含有负极活性物质层的负极的正极。 正极活性物质层包含多个x [Li 2 MnO 3] - （1-x）[LiCo1 / 3Mn1 / 3Ni1 / 3O2]（通过分配例如0.5〜x的x）作为正极活性物质的粒子， 以及所述多个正极活性物质的所述粒子至少部分地彼此连接的多层石墨烯。 在多层石墨烯中，以分层的方式层叠多个石墨烯。 石墨烯含有由碳原子组成的六元环，由碳原子构成的七元或更多元环的多元环，和与六元环中的一个或多个碳原子键合的氧原子 环和多元环，其为七元或多元环。