Patent ID: 8551653

Claim:
A composite material for anode of Li-ion batteries, comprising the components represented by the following formula Sn a1 —X a2 —Se d1 —Si d2 —C c in which, X represents one or more selected from Cu, V, Co, Ti, Mo, Mg, W and Zn; and a 1 , a 2 , d 1 , d 2 , and c represent the weight ratio of Sn, X, Se, Si and C to the total amount of Sn, X, Se, Si and C, respectively, wherein a 1 +a 2 is equal to 0.4-0.7, d 1 +d 2 is equal to 0.05-0.6, c is equal to 0.01-0.25, d 2 /d 1 ranges from 0.05/1.4 to 1/1.4, and a 2 /a 1 ranges from 0 to 1/1.5.