SODIUM SECONDARY BATTERY

摘要

Disclosed is a sodium secondary battery.  The sodium secondary battery comprises a positive electrode, a negative electrode, a separator arranged between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution, wherein the separator comprises a laminated porous film composed of a heat-resistant porous layer and a porous film laminated on each other, and wherein the heat-resistant porous layer is arranged on the side that faces the positive electrode.