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

摘要

A positive electrode active material for a sodium molten salt battery, comprising a sodium-containing metal oxide capable of electrochemically intercalating and deintercalating sodium ions and having a mass ratio of sodium carbonate of 500 ppm or less.