公开(公告)号：US20190067701A1

公开(公告)日：2019-02-28

申请号：US16170140

申请日：2018-10-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

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.

公开(公告)号：US10593940B2

公开(公告)日：2020-03-17

申请号：US16025109

申请日：2018-07-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kiyofumi Ogino ,  Yumiko Yoneda ,  Rika Yatabe ,  Nobuhiro Inoue

IPC: H01M4/134 ,  H01M4/38 ,  H01M4/62

Abstract: A power storage device having high capacitance is provided. A power storage device with excellent cycle characteristics is provided. A power storage device with high charge and discharge efficiency is provided. A power storage device including a negative electrode with low resistance is provided. A negative electrode for the power storage device includes a current collector and an active material layer including a plurality of active material particles over the current collector. The active material particle is silicon, and the size of the silicon particle is greater than or equal to 0.001 μm and less than or equal to 7 μm.

公开(公告)号：US09768443B2

公开(公告)日：2017-09-19

申请号：US14070636

申请日：2013-11-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro Kawakami ,  Masaki Yamakaji ,  Mako Motoyoshi ,  Rika Yatabe

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/625 ,  Y02E60/122

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

公开(公告)号：US09293770B2

公开(公告)日：2016-03-22

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 ,  H01M4/133 ,  H01M4/64 ,  H01M4/131 ,  H01M4/136 ,  H01M4/58 ,  C01B31/04 ,  H01M4/36

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 atomic 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。 作为非水系二次电池用正极中的导电性添加剂的原料，使用氧化石墨烯，在氧化石墨烯中，氧与碳的原子比大于或等于0.405。

公开(公告)号：US20140127568A1

公开(公告)日：2014-05-08

申请号：US14070636

申请日：2013-11-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki Yamakaji ,  Mako Motoyoshi ,  Rika Yatabe

IPC: H01M4/587 ,  H01M4/1393

CPC classification number: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/625 ,  Y02E60/122

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

Abstract translation: 提供一种非水系二次电池用正极，其包含具有导电性添加剂的低比例的足够的电子传导性的活性物质层。 一种非水系二次电池用正极，包括高活性物质层，包含活性物质和导电性添加剂的比率低的活性物质层。 活性物质层包括具有层状岩盐结构的活性物质的多个粒子，与活性物质的多个粒子表面接触的石墨烯和粘合剂。

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：US20130156942A1

公开(公告)日：2013-06-20

申请号：US13710497

申请日：2012-12-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Masaki YAMAKAJI ,  Rika Yatabe ,  Hiroatsu Todoriki

IPC: H01M4/04

CPC classification number: H01M4/0404 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/623 ,  H01M4/625 ,  Y02E60/122 ,  Y02P70/54

Abstract: To provide a positive electrode for a lithium-ion secondary battery, which is highly filled with a positive electrode active material and has a high-density positive electrode active material layer. To provide a lithium-ion secondary battery having high capacity and improved cycle characteristics with use of the positive electrode. After graphene oxide is dispersed in a dispersion medium, a positive electrode active material is added and mixed to form a mixture. A binder is added to the mixture and mixed to form a positive electrode paste. The positive electrode paste is applied to a positive electrode current collector and the dispersion medium contained in the positive electrode paste is evaporated, and then, the graphene oxide is reduced, so that a positive electrode active material layer containing graphene is formed over the positive electrode current collector.

Abstract translation: 为了提供高纯度的正极活性物质并具有高密度正极活性物质层的锂离子二次电池用正极。 使用正极来提供具有高容量和改进的循环特性的锂离子二次电池。 将氧化石墨烯分散在分散介质中后，加入正极活性物质并混合形成混合物。 向混合物中加入粘合剂并混合以形成正极浆料。 将正极浆料涂布在正极集电体上，使正极浆料中所含的分散介质蒸发，然后氧化石墨烯被还原，从而在正极上形成含有石墨烯的正极活性物质层 集电器

公开(公告)号：US11515517B2

公开(公告)日：2022-11-29

申请号：US16710468

申请日：2019-12-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro Kawakami ,  Masaki Yamakaji ,  Mako Motoyoshi ,  Rika Yatabe

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

公开(公告)号：US11108038B2

公开(公告)日：2021-08-31

申请号：US15193478

申请日：2016-06-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki Yamakaji ,  Takahiro Kawakami ,  Mako Motoyoshi ,  Rika Yatabe

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/04 ,  H01M4/62 ,  H01M4/1391 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: A positive electrode for a secondary battery which enables both good battery characteristics and electrode strength at a predetermined level, a secondary battery, and a method for fabricating the positive electrode for a secondary battery are provided. The positive electrode for a secondary battery includes a current collector and an active material layer over the current collector. The active material layer includes an active material, graphene, and a binder. A carbon layer is on a surface of the active material. The proportion of the graphene in the active material layer is greater than or equal to 0.1 wt % and less than or equal to 1.0 wt %.

公开(公告)号：US10128529B2

公开(公告)日：2018-11-13

申请号：US15346932

申请日：2016-11-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ai Nakagawa ,  Teppei Oguni ,  Kai Kimura ,  Rika Yatabe

IPC: H01M6/04 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M4/587 ,  H01M4/66 ,  H01M10/04 ,  H01M10/0567 ,  H01M10/058 ,  G01R31/36 ,  G01R31/44 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0569 ,  H02J7/00 ,  H01M10/42

Abstract: A lithium-ion secondary battery with a high capacity retention rate is provided. In addition, a fabricating method of a lithium-ion secondary battery with a high capacity retention rate is provided. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material layer. The electrolyte solution includes at least one of lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) and lithium bis(fluorosulfonyl)amide (LiFSA). The electrolyte solution includes vinylene carbonate (VC). A coating film including lithium oxide is on a surface of the negative electrode active material layer. A fabricating method of a lithium-ion secondary battery includes a first step of enclosing a positive electrode, a negative electrode, and an electrolyte solution in an exterior body, and a second step of annealing the exterior body enclosing the positive electrode, the negative electrode, and the electrolyte solution for 24 hours or longer after the first step. The annealing in the second step is performed at a temperature higher than or equal to 80° C. and lower than or equal to 100° C.