Positive electrode material, secondary battery, battery module, battery pack, and electric apparatus

A positive electrode material, comprising an active substance and a binder, wherein the binder has the following formula:

• wherein,
• R1, R3, R7, and R8 are each independently selected from H, halogen, substituted or unsubstituted C1-8 alkyl group, substituted or unsubstituted C1-8 alkoxy group, substituted or unsubstituted C1-8 acyloxy group, and substituted or unsubstituted C1-8 acylamino group;
• R2 is selected from —CN, —OH, —COOH and soluble salts thereof, sulfonic acid group and a salt thereof, substituted or unsubstituted C1-8 acyloxy group, substituted or unsubstituted C1-8 acylamino group, and substituted or unsubstituted C5-8 cycloacylamino group;
• R4 is selected from substituted or unsubstituted C5-20 aryl group, substituted or unsubstituted C4-8 saturated or unsaturated cyclic group, and substituted or unsubstituted C5-30 heterocyclic group;
• R5 and R6 are each independently selected from —H, halogen, hydroxyl group, substituted or unsubstituted C1-8 alkyl group, substituted or unsubstituted C1-8 alkoxy group, and substituted or unsubstituted C1-8 alkene group;
• and
• n=2100-4500, m=2100-5850, and q=350-1800.