SI ALLOY NEGATIVE ELECTRODE ACTIVE MATERIAL FOR ELECTRICAL DEVICE

Provided is a negative electrode active material for an electric device which exhibits a well-balanced property of maintaining a high cycle property and attaining a high initial capacity. [0002] [Technical solution] [0003] The negative electrode active material for an electric device comprising an alloy having a composition formula SiTiZn(where each of x, y, and z represents amass percent value, satisfying (1) x+y+z=100, (2) 38≤x