SODIUM SECONDARY BATTERY

摘要

There is provided a sodium secondary battery, including: an anode containing sodium; a cathode containing a sodium salt, a first polymer, and a cathode active material allowing reversible intercalation/deintercalation of sodium ions; and a solid electrolyte provided between the anode and the cathode and having sodium ion conductivity, wherein the first polymer contained in the cathode is melted at an operating temperature of the sodium secondary battery and forms a complex together with the sodium salt.