Patent ID: 7964309

Claim:
A non-aqueous electrolyte secondary cell comprising: a positive electrode having a positive electrode active material layer; a negative electrode having a negative electrode active material layer; and a non-aqueous electrolyte having a non-aqueous solvent and electrolytic salt, wherein: the positive electrode active material layer comprises particles of lithium nickel composite oxide represented by Li x Ni 1-y M y O z where 0.9<x≦1.1, 0≦y≦0.7, 1.9≦z≦2.1, and M contains at least one selected from Al, Co, and Mn; lithium carbonate exists on the surface of the particles of the lithium nickel composite oxide in an amount restricted to up to 0.20 mass % relative to the lithium nickel composite oxide; and a porous layer is formed on the positive electrode active material layer, the porous layer containing inorganic oxide and lithium carbonate in a mixed state.