SLURRY FOR THE POSITIVE ELECTRODE AND METHODS FOR PRODUCING SLURRY FOR THE POSITIVE ELECTRODE OF SECONDARY LITHIUM BATTERIES

Abstract

This paper describes the positive electrode slurry of a secondary lithium battery, which includes nickel-rich active material, conductive material, substrate, solvent, and additives. The substrate consists of a primary and secondary binder, both polyvinylidene chloride polymers with the same chemical formula (C2H2F2)x but differing in structure and molecular weight. Specifically, the molecular weight of the primary binder's polyvinylidene chloride polymer is greater than 1,000,000, the secondary binder's molecular weight ranges from 500,000 to 800,000, the proportion of the primary binder to the total substrate ranges from 70% to 97% by weight, and the proportion of the secondary binder to the total substrate ranges from 3% to 30% by weight. quantity. The invention also relates to a method for producing the anode slurry of a secondary lithium battery.