Abstract: Component A: a carboxymethyl cellulose having a degree of carboxymethyl substitution per anhydroglucose unit of 0.45 or more or a salt thereof and Component B: a saturated carboxylic acid having 6 or less carbon atoms or a salt thereof are contained.

Abstract: A binder for non-aqueous electrolyte secondary batteries, the binder containing a carboxymethyl cellulose and/or a salt thereof, wherein the carboxymethyl cellulose and/or a salt thereof satisfies the conditions (A) and (B) described below. Condition (A): The degree of carboxymethyl substitution per glucose unit is from 0.5 to 1.5. Condition (B): The viscosity ratio of the viscosity Vb (30 rpm, 23° C.) of an aqueous dispersion thereof having a solid content of 3% (w/v) to the viscosity Va (30 rpm, 23° C.) of an aqueous dispersion thereof having a solid content of 2% (w/v), namely Vr1=Vb/Va satisfies Vr1>3.

Abstract: The present invention is aimed to provide carboxymethylcellulose or a salt thereof for a nonaqueous electrolyte secondary battery, an electrode composition containing the same for a nonaqueous electrolyte secondary battery, an electrode for a nonaqueous electrolyte secondary battery, and a nonaqueous electrolyte secondary battery, with a small reduction in the capacity even when charging and discharging are repeated, and with high durability. The carboxymethylcellulose or the salt thereof is used as a binder for an electrode of a nonaqueous electrolyte secondary battery, in which the degree of substitution with carboxymethyl of the carboxymethylcellulose or the salt thereof is 0.5 to 1.5, and a thermal rate of change T that is a difference (WB?WA) between a thermal weight reduction rate WA at a thermal decomposition start point and a thermal weight reduction rate WB at a thermal decomposition end point measured by a thermogravimetric-differential thermal analyzer is 45% or lower.