Si ALLOY NEGATIVE ELECTRODE ACTIVE MATERIAL FOR ELECTRICAL DEVICE

摘要

Disclosed is a negative electrode active material for an electrical device, which exhibits well balanced characteristics. Namely, the negative electrode active material for an electrical device has high initial capacity, while maintaining high cycle characteristics. Specifically disclosed is a negative electrode active material for an electrical device, which contains an alloy that has a compositional formula: SixTiyZnz (wherein x, y and z respectively represent percentages by mass of respective elements and satisfy (1) x + y + z = 100, (2) 38 = x < 100, (3) 0 < y < 62 and (4) 0 < z < 62).