| abstract |
An electrolyte composition for electric double layer capacitors mainly consisting of an ion-conductive salt and a polyurethane polymer compound having a high dielectric constant, an ability of dissolving an ion-conductive salt at high concentration therein, and a high surface tackiness owing to the introduction of a substituent of a large dipole moment into a polyurethane molecule, allowing a large area material and a conductive material to be firmly bound, and exhibiting as high an interface impedance as an electrolyte solution does is disclosed. A solid polymer electrolyte, a composition for polarizable electrodes mainly consisting of a polyurethane polymer compound, a large area material, and a conductive material, a polarizable electrode, and a high-performance electric double layer capacitor comprising them are also disclosed. |