Invention Grant
- Patent Title: Non-aqueous electrolyte secondary battery
- Patent Title (中): 非水电解质二次电池
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Application No.: US12096262Application Date: 2007-05-18
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Publication No.: US08067119B2Publication Date: 2011-11-29
- Inventor: Masaki Deguchi , Tooru Matsui , Hiroshi Yoshizawa
- Applicant: Masaki Deguchi , Tooru Matsui , Hiroshi Yoshizawa
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2006-140011 20060519
- International Application: PCT/JP2007/060201 WO 20070518
- International Announcement: WO2007/135974 WO 20071129
- Main IPC: H01M6/04
- IPC: H01M6/04 ; H01M6/16

Abstract:
A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester.The combination of the foregoing separator and the foregoing non-aqueous electrolyte makes it possible to suppress the deterioration in the rate performance of the battery even when the battery is stored under high voltage and high temperature.
Public/Granted literature
- US20090246641A1 NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY Public/Granted day:2009-10-01
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