Invention Grant
- Patent Title: Lithium secondary battery and production method of the same
- Patent Title (中): 锂二次电池及其制作方法相同
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Application No.: US12388580Application Date: 2009-02-19
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Publication No.: US08192871B2Publication Date: 2012-06-05
- Inventor: Hiroshi Haruna , Kazushige Kohno , Eiji Seki , Yoshiaki Kumashiro
- Applicant: Hiroshi Haruna , Kazushige Kohno , Eiji Seki , Yoshiaki Kumashiro
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2008-059873 20080310
- Main IPC: H01M4/13
- IPC: H01M4/13

Abstract:
To provide a lithium secondary battery which suppresses a decrease in the charge and discharge efficiency during a battery storage test and which is excellent in maintaining the battery capacity after the storage test. There are disclosed a nonaqueous lithium battery, comprising: a positive electrode active material comprising a lithium-containing oxide capable of inserting and detaching lithium ions; a negative electrode active material comprising a carbon material capable of inserting and detaching lithium ions; and an electrolytic solution containing a lithium ion, wherein the surface of the negative electrode active material after initializing charging is coated with a compound derived from vinylene carbonate, and wherein a weight power density of the lithium battery is no less than 100 Wh/kg, and a method of producing a nonaqueous lithium battery comprising a step of sealing a positive electrode active material, a negative electrode active material, and a nonaqueous electrolytic solution using a sealed container, wherein a predetermined amount of vinylene carbonate is added into the nonaqueous electrolytic solution, and the initializing charging is carried out to form a coating on the surface of the negative electrode active material, the coating being derived from the vinylene carbonate.
Public/Granted literature
- US20090263721A1 LITHIUM SECONDARY BATTERY AND PRODUCTION METHOD OF THE SAME Public/Granted day:2009-10-22
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