BINDER COMPOSITION FOR SECONDARY BATTERY POSITIVE ELECTRODE, SLURRY COMPOSITION FOR SECONDARY BATTERY POSITIVE ELECTRODE, SECONDARY BATTERY POSITIVE ELECTRODE, AND SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide: a binder composition exhibiting excellent electrolyte resistance; a slurry composition exhibiting excellent stability; a positive electrode having high flexibility, smoothness and binding properties; and a secondary battery having excellent high-temperature cycle characteristics.SOLUTION: A binder contains a polymerization unit having a nitrile group, an aromatic vinyl polymerization unit, a polymerization unit having a hydrophilic group, and a linear alkylene polymerization unit having 4 or more carbon atoms. In a binder composition for a secondary battery positive electrode, the content ratio of the aromatic vinyl polymerization unit is 5-50 mass%.