A method for producing a negative electrode active material containing Si and metal M (M is selected from Al, Zn, Ge, Ag, In, Sn, Sb, Au, Pb, and Bi).

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a suitable Si-containing negative electrode active material. SOLUTION: Si and metal M (M is selected from Al, Zn, Ge, Ag, In, Sn, Sb, Au, Pb, Bi) are mechanically mixed to contain the Si and the metal M. The process of manufacturing the negative electrode active material precursor, An annealing step of heating the negative electrode active material precursor at _{a temperature T (K) lower than the melting point T mp (K) of the metal M.} A method for producing a negative electrode active material, which comprises. [Selection diagram] None