SODIUM SECONDARY BATTERY

摘要

The present invention relates to a sodium secondary battery which is capable of being operated at a low temperature by comprising a molten salt electrolyte having an adjusted melting point and, particularly, to a sodium secondary battery comprising: an anode which contains sodium; a cathode which contains transition metal and alkali metal halides; and a sodium ionic conducting solid electrolyte provided between the anode and the cathode, wherein the cathode is impregnated in a sodium molten salt electrolyte including an ether structure (-O-).