公开(公告)号：US10249876B2

公开(公告)日：2019-04-02

申请号：US15874123

申请日：2018-01-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro Kawakami ,  Tatsuya Ikenuma ,  Teruaki Ochiai ,  Shuhei Yoshitomi ,  Mako Motoyoshi ,  Hiroyuki Miyake ,  Yohei Momma ,  Takuya Hirohashi ,  Satoshi Seo

IPC: H01M4/505 ,  H01M4/485 ,  H01M4/48 ,  H01M4/62 ,  H01M4/583 ,  G06F1/16 ,  G04G21/00 ,  G04C10/00 ,  H01M4/36 ,  H01M4/525 ,  H01M10/052

Abstract: A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with unproved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.

公开(公告)号：US10230095B2

公开(公告)日：2019-03-12

申请号：US15156524

申请日：2016-05-17

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Kai Kimura ,  Tatsuya Ikenuma ,  Nobuhiro Inoue ,  Teppei Oguni

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

Abstract: To provide a power storage device with a high capacity. To provide a power storage device with a high energy density. To provide a highly reliable power storage device. To provide a long-life power storage device. To provide an electrode with a high capacity. To provide an electrode with a high energy density. To provide a highly reliable electrode. To provide a long-life electrode. The power storage device includes a first electrode and a second electrode. The first electrode includes a first current collector and a first active material layer. The first active material layer includes a first active material and a first binder. The first active material is graphite. A separation strength F of the first electrode that is measured when the first active material layer is separated from the first current collector after the first electrode is immersed in a solution at a temperature higher than or equal to 20° C. and lower than or equal to 70° C. for longer than or equal to three hours is higher than or equal to 0.05 N/cm and lower than or equal to 5 N/cm per unit width of a sample that is separated.

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：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。