| abstract |
Wherein the positive electrode has a positive electrode active material and the positive electrode active material is at least one element selected from the group consisting of Li t CoM s O 2 where M is at least one element selected from Fe, V, Cr, Ti, Mg, Al, B and Ca; A zirconium-containing lithium cobalt composite oxide containing zirconium (Zr) as a subcomponent element and a lithium cobalt composite oxide represented by the formula Li x Co 1 - y A y O 2 (wherein A represents at least one element selected from the group consisting of Mg, And at least one element selected from Al; 0.05? X? 1.15; 0? Y? 0.03) is mixed with the lithium cobalt composite oxide.n n n n Positive electrode active material, non-aqueous electrolyte secondary battery |