Patent ID: 10141610

Abstract:
Provided is a non-aqueous electrolyte secondary battery combining high battery performance in normal use and endurance against overcharge. The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode active material 16. Positive electrode active material 16 is formed of a particulate lithium composite oxide 16c comprising at least lithium, nickel, cobalt, manganese and tungsten; and a nickel oxide layer 16s formed on the lithium composite oxide surface. With the non-lithium metals in lithium composite oxide 16c being 100% by mole, tungsten accounts for 0.05% by mole or greater, but 2% by mole or less. With lithium composite oxide 16c being 100 parts by mass, the nickel oxide content is 0.01 part by mass or greater, but 2 parts by mass or less.