公开(公告)号：US10938035B2

公开(公告)日：2021-03-02

申请号：US16001467

申请日：2018-06-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki Yamakaji ,  Kuniharu Nomoto

IPC: H01M4/134 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/62 ,  H01M4/04 ,  H01M4/58

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：US10748673B2

公开(公告)日：2020-08-18

申请号：US15097565

申请日：2016-04-13

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Junpei Momo ,  Hiroatsu Todoriki ,  Kuniharu Nomoto

IPC: H01B1/04 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/058 ,  H01G11/32 ,  H01G11/86 ,  H01M4/587 ,  H01M10/052 ,  H01M12/00 ,  H01G11/38 ,  H01M10/0525 ,  H01M4/02 ,  H01G11/06

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：US20130283603A1

公开(公告)日：2013-10-31

申请号：US13923428

申请日：2013-06-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takuya MIWA ,  Kuniharu Nomoto ,  Nobuhiro Inoue

IPC: H01M4/58 ,  H01G9/042 ,  H01M10/04

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。

公开(公告)号：US11699790B2

公开(公告)日：2023-07-11

申请号：US17706646

申请日：2022-03-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takeshi Osada ,  Toshihiko Takeuchi ,  Kuniharu Nomoto

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

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

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：US12300820B2

公开(公告)日：2025-05-13

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

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：US11735731B2

公开(公告)日：2023-08-22

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 ,  H01M10/0525

CPC classification number: H01M4/5835 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/192 ,  C01B32/23 ,  H01G9/042 ,  H01G11/22 ,  H01G11/32 ,  H01G11/36 ,  H01M4/0438 ,  H01M4/133 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/587 ,  H01M4/62 ,  H01M6/16 ,  H01M10/0566 ,  H01M10/0525 ,  Y02E60/13

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：US10461332B2

公开(公告)日：2019-10-29

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 ,  H01G11/22 ,  H01G11/32 ,  H01G9/042 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/587 ,  B82Y30/00 ,  B82Y40/00 ,  H01M4/139 ,  H01M4/62 ,  H01M6/16 ,  H01M10/0566 ,  C01B32/23 ,  C01B32/192 ,  H01M10/0525

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：US10164243B2

公开(公告)日：2018-12-25

申请号：US15342860

申请日：2016-11-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kuniharu Nomoto ,  Takuya Miwa ,  Masaki Yamakaji ,  Takahiro Kawakami

IPC: H01M4/583 ,  H01M4/58 ,  H01M4/1397 ,  H01M4/04 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/136 ,  H01M4/02

Abstract: An energy storage device having high capacity per weight or volume and a positive electrode active material for the energy storage device are manufactured. A surface of a main material included in the positive electrode active material for the energy storage device is coated with two-dimensional carbon. The main material included in the positive electrode active material is coated with a highly conductive material which has a structure expanding two-dimensionally and whose thickness is ignorable, whereby the amount of carbon coating can be reduced and an energy storage device having capacity close to theoretical capacity can be obtained even when a conduction auxiliary agent is not used or the amount of the conduction auxiliary agent is extremely small. Accordingly, the amount of carbon coating in a positive electrode and the volume of the conduction auxiliary agent can be reduced; consequently, the volume of the positive electrode can be reduced.

公开(公告)号：US09711292B2

公开(公告)日：2017-07-18

申请号：US14178535

申请日：2014-02-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Nobuhiro Inoue

IPC: H01G9/042 ,  H01M4/58 ,  H01M10/04 ,  H01M4/62 ,  B82Y30/00

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.

公开(公告)号：US09556536B2

公开(公告)日：2017-01-31

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: H01M4/485 ,  C30B29/14 ,  H01M4/04 ,  H01M4/583 ,  C01B25/30 ,  C01B25/45 ,  C01B31/04 ,  H01M4/1397 ,  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.

Abstract translation: 具有橄榄石结构的含锂复合氧化物中的结晶的b轴方向的锂离子的闭塞和释放容易发生一维的变化。 因此，提供了含锂复合氧化物单晶的b轴与正极集电体的表面垂直取向的正极。 将含锂复合氧化物颗粒与氧化石墨烯混合，然后施加压力，由此长方体或大致长方体的颗粒容易滑动。 此外，在使用长度方向的长轴方向的长方体或长方形的长方体的长度比a轴方向和c轴方向短的情况下，在一个方向施加压力的情况下， b轴可以在一个方向上定向。