Invention Grant
- Patent Title: Positive electrode for secondary battery, secondary battery, and method for fabricating positive electrode for secondary battery
- Patent Title (中): 二次电池用正极,二次电池以及二次电池用正极制造方法
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Application No.: US13973524Application Date: 2013-08-22
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Publication No.: US09385366B2Publication Date: 2016-07-05
- Inventor: Masaki Yamakaji , Takahiro Kawakami , Mako Motoyoshi , Rika Yatabe
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP Kanagawa-ken
- Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee Address: JP Kanagawa-ken
- Agency: Nixon Peabody LLP
- Agent Jeffrey L. Costellia
- Priority: JP2012-186404 20120827
- Main IPC: H01M4/02
- IPC: H01M4/02 ; H01M4/131 ; H01M4/04 ; H01M4/62 ; H01M4/1391 ; H01M4/136 ; H01M4/1397 ; H01M4/36 ; H01M4/505 ; H01M4/525 ; H01M4/587 ; H01M10/052

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 %.
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