ELECTROLYTE COMPOSITION FOR ELECTRIC DOUBLE LAYER CAPACITOR, SOLID POLYMER ELECTROLYTE, COMPOSITION FOR POLARIZABLE ELECTRODE, POLARIZABLE ELECTRODE, AND ELECTRIC DOUBLE LAYER CAPACITOR

摘要

A polyurethane compound, due to a substituent having a large dipole moment introduced onto the polyurethane molecule, can improve the closeness of contact between electrodes and an electrolyte and achieve an interfacial impedance comparable to that of electrolyte solution, while retaining a high dielectric constant and the ability to dissolve ion-conductive salts to a high concentration. The invention is also directed at a binder resin composed of the polymeric compound, an ion-conductive polymer electrolyte composition of high ionic conductivity and high bond strength which is composed primarily of an ion-conductive salt and a polyelectrolyte-providing polymer made of the polymeric compound, and a secondary cell in which these serve as constituents.