Binder for electrode formation, slurry for electrode formation using the binder, electrode using the slurry, rechargeable battery using the electrode, and capacitor using the electrode

A binder for electrode formation, wherein a polyolefin resin that contains 50 to 98% by mass of at least one of a propylene component and a 1-butene component and 0.5 to 20% by mass of an unsaturated carboxylic acid unit is dispersed together with a basic compound whose boiling point is lower than 250° C. in an aqueous medium,

• the unsaturated carboxylic acid unit being one of a acrylic acid unit, a methacrylic acid unit, maleic acid unit, maleic anhydride unit, itaconic acid unit, itaconic anhydride unit, aconitic acid unit, aconitic anhydride unit, fumaric acid unit, crotonic acid unit, citraconic acid unit, mesaconic acid unit and an allylsuccinic acid unit;
• the basic compound being one of ammonia, triethylamine, N,N-dimethylethanolamine, isopropylamine, aminoethanol, dimethylaminoethanol, diethylaminoethanol, ethylamine, diethyl amine, isobutylamine, dipropylamine, 3-ethoxypropylamine, 3-diethylaminopropylamine, sec-butylamine, propylamine, n-butylamine, 2-methoxyethylamine, 3-methoxypropylamine, 2,2-dimethoxyethylamine, monoethanolamine, morpholine, N-methylmorpholine, N-ethylmorpholine, pyrrole and pyridine, and the basic compound being present in an amount of 0.5 to 3.0 equivalents relative to the unsaturated carboxylic acid unit in the polyolefin resin.