BINDER FOR SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a binder for a secondary battery suited for an alkaline secondary battery provided by using a hydrogen storage alloy and a nonaqueous electrolyte secondary battery using a lithium compound. SOLUTION: The binder for a secondary battery is an amorphous polypropylene homopolymer or a copolymer of propylene and a 2-8C olefin, and it is characterized in that it includes an amorphous copolymer with a percentage content of propylene of 50 mass%. By this, a cycle characteristic which conventionally could not be provided is provided.