Positive electrode active material for non-aqueous secondary battery and method of manufacturing thereof

摘要

A positive electrode active material for non-aqueous secondary battery includes core particles containing a lithium transition metal composite oxide, and a covering layer covering, that covers a surface of the core particle. The covering layer contains niobium and carbonate ions, and the carbonate ions are present at a concentration of from 0.2 weight % to 0.4 weight %. The positive electrode active material for non-aqueous secondary battery exhibits infrared absorption peaks at a wavenumber range of from 1320 cm−1 to 1370 cm−1, and at a wavenumber range of from 1640 cm−1 to 1710 cm−1.

主权项

1. A positive electrode active material for non-aqueous secondary battery, the positive electrode active material comprising:
core particles containing a lithium transition metal composite oxide, and a covering layer, that covers a surface of the core particle, wherein the covering layer comprises niobium and carbonate ion and the carbonate ions are present at a concentration of from 0.2 weight % to 0.4 weight %; and exhibits infrared absorption peaks at a wavenumber range of from 1320 cm-1 to 1370 cm−1, and at a wavenumber range of from 1640 cm-1 to 1710 cm−1, wherein the lithium transition metal complex oxide is represented by the following formula:
LiaNi1-x-yCoxMnyO2 and a, x, and y, respectively, satisfy 0.95≦a≦1.2, 0.30≦x≦0.40, 0.30≦y≦0.40, 0.60≦x+y≦0.70.