NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery with high energy density and long charge/discharge cycle life. SOLUTION: The nonaqueous electrolyte secondary battery is equipped with a positive electrode 3, a negative electrode 4 capable of absorbing/releasing lithium ion...

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Bibliographische Detailangaben
Hauptverfasser: YAJIMA TORU, FUKUI MEIKO, SATO ASAKO, HOSOBUCHI KAORU, HATANAKA CHIZURU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery with high energy density and long charge/discharge cycle life. SOLUTION: The nonaqueous electrolyte secondary battery is equipped with a positive electrode 3, a negative electrode 4 capable of absorbing/releasing lithium ions, and a nonaqueous electrolyte containing γ-butyrolactone (GBL), the surface area per 1 g of the negative electrode measured by a nitrogen gas adsorbing BET method is 1.5-2.8 m2, and the retaining amount of the nonaqueous electrolyte of the negative electrode is 100 mg or more per 1 m2of the surface area of the negative electrode. COPYRIGHT: (C)2005,JPO&NCIPI