| abstract |
A nonaqueous secondary battery of the present invention includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte, and the positive electrode includes a lithium-containing composite oxide represented by General Formula (1): Li 1 + y MO 2 as a positive electrode active material, In the general composition formula (1), -0.5≤y≤0.5, M represents an element group containing Ni and at least one element selected from the group consisting of Co, Mn, Fe and Ti, The nonaqueous electrolyte is a cycloalkane derivative (A) having at least one alkyl ether group containing an unsaturated bond, an aza crown ether compound (B) and a nitrogen-containing heterocyclic compound having at least one functional group containing an unsaturated bond. It is characterized by including at least 1 sort (s) of compound chosen from the group which consists of (C). |