Invention Grant
- Patent Title: Non-aqueous electrolyte secondary battery and method of producing coating for negative electrode active material thereof
- Patent Title (中): 非水电解质二次电池及其负极活性物质用涂料的制造方法
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Application No.: US11358083Application Date: 2006-02-22
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Publication No.: US07767340B2Publication Date: 2010-08-03
- Inventor: Tetsuo Nanno , Tomohiro Ueda
- Applicant: Tetsuo Nanno , Tomohiro Ueda
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2005-045031 20050222
- Main IPC: H01M4/58
- IPC: H01M4/58

Abstract:
A non-aqueous electrolyte secondary battery having a positive electrode and a negative electrode with an active material capable of absorbing and desorbing lithium, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The negative electrode active material is covered by a coating having elasticity. The fully elastic coating expands and contracts following the volume change of the negative electrode active material; thus, the coating brings out its desired functions without being damaged or broken. Regardless of the degree of the volume change of the negative electrode active material, a lasting coating without damage is formed on the negative electrode active material, to improve performances of the non-aqueous electrolyte secondary battery.
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