| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having a long cycle life even when charged at a positive electrode charging potential of 4.4 to 4.6 V based on lithium and having a high residual capacity after storage at high temperature in a charged state. <P>SOLUTION: A positive electrode active material of the nonaqueous electrolyte secondary battery includes a mixture of a lithium-cobalt composite oxide containing at least both zirconium and magnesium, and a lithium-manganese-nickel composite oxide containing at least both manganese and nickel. A nonaqueous electrolyte of the nonaqueous electrolyte secondary battery includes: fluoroethylene carbonate and dimethyl carbonate as a nonaqueous solvent; and further an additive represented by the following general formula (1), wherein R is methyl or hydrogen atom, m is 0 or 1, and n is 1 or 2. <P>COPYRIGHT: (C)2011,JPO&INPIT |
