Patent ID: 7438991
Filing Date: 2008-10-21
Classification: H01M,Y02E

Abstract:
1. A non-aqueous electrolyte secondary cell comprising: a positive electrode comprising a positive electrode active material; a negative electrode comprising a negative electrode active material; and a non-aqueous electrolyte comprising a non-aqueous solvent and electrolytic salt, wherein: the positive electrode active material comprises: lithium cobalt compound oxide having added therein at least zirconium and magnesium; and lithium-nickel-manganese compound oxide having a layered structure; the positive electrode active material has a potential of from 4.4 to 4.6 V with respect to lithium; and the non-aqueous solvent contains diethyl carbonate of 10 vol. % or higher and 30 vol. % or lower at 25° C.