公开(公告)号：US20170324082A1

公开(公告)日：2017-11-09

申请号：US15659665

申请日：2017-07-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI ,  Mako MOTOYOSHI ,  Rika YATABE

IPC: H01M4/1393 ,  H01M4/133 ,  H01M4/131 ,  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：US20160308200A1

公开(公告)日：2016-10-20

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 ,  H01M4/587 ,  H01M4/136 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

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 %.

Abstract translation: 提供一种能够实现良好的电池特性和预定电极电极强度的二次电池用正极，二次电池以及二次电池用正极的制造方法。 二次电池用正极在集电体上具有集电体和活性物质层。 活性物质层包括活性物质，石墨烯和粘合剂。 碳层在活性材料的表面上。 活性物质层中的石墨烯的比例大于或等于0.1重量％且小于或等于1.0重量％。