Invention Grant
- Patent Title: Lithium-ion secondary battery
- Patent Title (中): 锂离子二次电池
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Application No.: US14235463Application Date: 2011-07-29
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Publication No.: US09281513B2Publication Date: 2016-03-08
- Inventor: Koji Takahata
- Applicant: Koji Takahata
- Applicant Address: JP Toyota-shi, Aichi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi, Aichi
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- International Application: PCT/JP2011/067537 WO 20110729
- International Announcement: WO2013/018182 WO 20130207
- Main IPC: H01M4/587
- IPC: H01M4/587 ; H01M4/1393 ; H01M4/04 ; H01M4/133 ; H01M4/36 ; H01M10/0525
Abstract:
A lithium-ion secondary battery (100A) has a negative electrode current collector (241A) and a negative electrode active material layer (243A) formed on the negative electrode current collector (241A). The negative electrode active material layer (243A) contains a graphite material and a binder. The negative electrode active material layer (243A) has a first region (A1) neighboring the negative electrode current collector (241A), and the first region (A1) contains natural graphite in a weight ratio of equal to or greater than 80% of the graphite material. The negative electrode active material layer (243A) has a second region (A2) neighboring a surface thereof, and the second region (A2) contains artificial graphite in a weight ratio of equal to or greater than 80% of the graphite material.
Public/Granted literature
- US20140186702A1 LITHIUM-ION SECONDARY BATTERY Public/Granted day:2014-07-03
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