Positive electrode active material composition, positive electrode plate, secondary battery, battery module, battery pack and electric device

A positive electrode active material composition, comprising a positive electrode active material and a dispersant, wherein:

• the positive electrode active material has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, wherein:
• A comprises one or more elements selected from Zn, Al, Na, K, Mg, Nb, Mo, and W;
• B comprises one or more elements selected from Ti, V, Zr, Fe, Ni, Mg, Co, Ga, Sn, Sb, Nb, and Ge;
• C comprises one or more elements selected from B (boron), S, Si, and N;
• D comprises one or more elements selected from S, F, Cl, and Br;
• a is selected from a range of 0.9 to 1.1;
• x is selected from a range of 0.001 to 0.1;
• y is selected from a range of 0.001 to 0.5;
• z is selected from a range of 0.001 to 0.1;
• n is selected from a range of 0.001 to 0.1;
• and
• the positive electrode active material is electrically neutral;
• and
• the dispersant comprises a polymer, and the polymer comprises:
• a first monomeric unit represented by Formula 1;
• a second monomeric unit, which is at least one selected from the group consisting of a monomeric unit represented by Formula 2 and a monomeric unit represented by Formula 3;
• and
• a third monomeric unit, which is at least one selected from the group consisting of a monomeric unit represented by Formula 4 and a monomeric unit represented by Formula 5;