BINDER COMPOSITION FOR POWER STORAGE DEVICE, ELECTRODE MIXTURE FOR POWER STORAGE DEVICE, ELECTRODE FOR POWER STORAGE DEVICE, AND SECONDARY BATTERY

摘要

Provided is a binder composition for a power storage device, the composition having excellent flexibility and adhesive properties, enabling excellent coating properties to be obtained in an electrode mixture for a power storage device, and enabling excellent charge and discharge properties to be achieved in a secondary battery.　A binder composition for a power storage device, the composition comprising: a liquid medium; a fluorine-containing copolymer (Y) comprising a unit (a) derived from chlorotrifluoroethylene, a unit (b) derived from an alkyl vinyl ether group, a unit (c) derived from vinyl ether comprising a hydroxy group or an expoxy group; and a fluorine-containing copolymer (Z) comprising a unit (s) derived from tetrafluoroethylene, and a unit (t) derived from propylene, and having a glass transition temperature of -60-20°C.