NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having excellent charge-discharge cycle performance, which includes a positive electrode containing a lithium-excess-type cathode active material.SOLUTION: A nonaqueous electrolyte secondary battery includes: a positive elec...

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Bibliographic Details
Main Author IMIZU MASASHI
Format Patent
LanguageEnglish
Published 05.09.2013
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having excellent charge-discharge cycle performance, which includes a positive electrode containing a lithium-excess-type cathode active material.SOLUTION: A nonaqueous electrolyte secondary battery includes: a positive electrode; a nonaqueous electrolyte incorporating boric acid therein; and a negative electrode. The positive electrode includes a lithium secondary battery cathode active material containing a lithium-transition metal composite oxide represented by a composition formula LiMeO(Me is a transition metal element containing Co, Ni and Mn, 1.25≤(1+α)/(1-α)≤1.5, a mole ratio of Co in Me, Co/Me, is 0.04-0.36, and a mole ratio of Mn in Me, Mn/Me, is 0.668-0.44).
Bibliography:Application Number: JP20130012796