NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A nonaqueous electrolyte secondary battery is provided of which charge cutoff voltage can be set at 4.3 V or above without deterioration of charge-discharge cycle characteristics and thermal stability to thereby increase a charge-discharge capacity. The nonaqueous electrolyte secondary battery inclu...

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Main Authors TAKAHASHI, YASUFUMI, TODE, SHINGO, KINOSHITA, AKIRA, HASEGAWA, KAZUHIRO, FUJITANI, SHIN, FUJIMOTO, HIROYUKI, NAKANE, IKURO
Format Patent
LanguageEnglish
French
German
Published 02.06.2010
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:A nonaqueous electrolyte secondary battery is provided of which charge cutoff voltage can be set at 4.3 V or above without deterioration of charge-discharge cycle characteristics and thermal stability to thereby increase a charge-discharge capacity. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte. Characteristically, the positive active material comprises a mixture of a lithium transition metal complex oxide A obtained by incorporating at least Zr and Mg into LiCoO 2 and a lithium transition metal complex oxide B having a layered structure and containing at least Ni and Mn as the transition metal.
Bibliography:Application Number: EP20050719995