| 摘要 |
A nonaqueous electrolyte secondary battery according to the invention comprises a positive electrode containing a positive electrode active material including lithium containing composite oxide having a layer crystal structure represented by a general formula of Li<SUB>x</SUB>Mn<SUB>a</SUB>Co<SUB>b</SUB>M<SUB>c</SUB>O<SUB>2 </SUB>(0.9<=X<=1.1, 0.45<=a<=0.55, 0.45<=b<=0.55, 0<c<=0.05 and 0.9<a+b+c<=1.1 are set and M is at least one kind selected from Al, Mg, Sn, Ti and Zr), a negative electrode containing a negative electrode active material capable of intercalating and deintercalating lithium ion, a separator for separating the positive electrode from the negative electrode, and a nonacqueous electrolyte. |
