Invention Grant
- Patent Title: Anode and battery, and manufacturing methods thereof
- Patent Title (中): 阳极和电池及其制造方法
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Application No.: US10531248Application Date: 2003-10-06
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Publication No.: US07754381B2Publication Date: 2010-07-13
- Inventor: Takemasa Fujino , Takatomo Nishino , Yoshiaki Takeuchi
- Applicant: Takemasa Fujino , Takatomo Nishino , Yoshiaki Takeuchi
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2002-311269 20021025
- International Application: PCT/JP03/12780 WO 20031006
- International Announcement: WO2004/038835 WO 20040506
- Main IPC: H01M4/62
- IPC: H01M4/62 ; H01M4/02

Abstract:
An anode and a battery capable of realizing a high capacity and improving charge and discharge cycle characteristics, and manufacturing methods thereof are provided. An anode active material layer contains a particulate anode active material including a simple substance or a compound of an element capable of forming an alloy with Li, a particulate binder including a copolymer of vinylidene fluoride or polyvinylidene fluoride, and a conductive agent. The anode active material layer is formed by using a dispersion medium having a swelling degree of 10% or less to the binder, specifically pure water or the like. The particulate binder functions as a cushion to absorb expansion and shrinkage of the anode active material due to charge and discharge, and lowering of electron conductivity caused by generation of cracks or separation is prevented. Further, since the anode active material is not covered with the binder, electrode reaction is well performed.
Public/Granted literature
- US20060099505A1 Anode and battery, and manufacturing methods thereof Public/Granted day:2006-05-11
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