abstract |
A secondary battery having high capacity and excellent cycle charge / discharge characteristics having basic performance as a battery is provided. A composition for a solid polymer electrolyte comprising a polyether copolymer, a photoreaction initiator, and an electrolyte salt compound as main components by appropriately selecting a polyether copolymer, a photoreaction initiator, and an electrolyte salt compound. A crosslinked product of the product is inserted between the positive electrode and the negative electrode, and the main surfaces of the negative electrode and the positive electrode are covered with a composition for a polymer solid electrolyte mainly composed of a polyether copolymer and an electrolyte salt compound. Adopted for the next battery. [Selection figure] None |