ナトリウムイオン電池用負極活物質およびナトリウムイオン電池

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode active material for a sodium ion battery capable of improving rate characteristics.SOLUTION: A negative electrode active material for a sodium ion battery is provided which is characterized in that a part of Ti in NaTiOcrystalline phase is substituted with M (M is at least one of Fe, V, Mn, Mo, Al, Cr, Mg, Nb, W, Zr, Ta and Sn).