Positive electrode active material and preparation method thereof, positive electrode plate, battery, and electric apparatus

Abstract

A positive electrode active material and a preparation method thereof, a positive electrode plate, a battery, and an electric apparatus are provided. The positive electrode active material includes: NaxMnaCubM1cM2dM3eO2+f−gRg, where M1 includes an element capable of forming a cation with a valence of +2 or less, M2 includes an element capable of forming a cation with a valence of +3, M3 includes an element capable of forming a cation with a valence of +4 or higher, R includes a Group VIIA element, 0.67≤x≤1.2, a+b+c+d+e=1, a>0, b>0, c≥0, d≥0, e≥0, −0.1≤f≤0.1, 0≤g≤0.05, and b 2 × ( b + c ) 2 × ( b + d ) a × ( a + e ) 4 ≤ 0 ⁢ .04 . ( I )

Dependencies are inferred from the claim text.