Binder composition for electrode of nonaqueous electrolyte battery, and electrode mixture, electrode and battery using same

By using a polymer comprising vinylidene fluoride and a polar polymer composition containing hydroxyl and / or carbonyl group in the molecule a functional group containing at least a binder as an electrode (positive electrode / or negative electrode) active material can be maintained non-aqueous high capacity necessary liquid-battery, while improving safety during the stability and performance of the internal short circuit.