| 摘要 |
A nonaqueous secondary battery is provided to prevent the generation of carbon dioxide gas due to the expansion of battery and to ensure excellent cycleability. A nonaqueous secondary battery comprises a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and non-aqueous electrolyte having a non-aqueous solvent and electrolyte salt. The positive electrode active material consists of a lithium nickel complex oxide(LixNi1-yMyOz, 0.9<x<=1.1, 0<=y<=0.7, 1.9<=z<=2.1, M includes at least one selected from Al, Co, Mn). The lithium carbonate amount existing on the surface of the lithium nickel complex oxide is 0.20 weight% or less based on the lithium nickel complex oxide. The porous layer having an inorganic oxide and lithium carbonate is installed on the surface of cathode. |
