CATHODE ACTIVE MATERIAL FOR SODIUM MOLTEN SALT BATTERY, POSITIVE ELECTRODE FOR SODIUM MOLTEN SALT BATTERY, AND SODIUM MOLTEN SALT BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a sodium molten salt battery, having excellent battery characteristic and reliability, with suppressed side reaction that does not contribute to charging/discharging.SOLUTION: The cathode active material for a sodium molten salt battery contains a sodium containing metal oxide capable of electrochemically occluding and discharging sodium ions, wherein a mass ratio of sodium carbonate is 500 ppm or less.