Composite anode active material for lithium rechargeable battery, method of preparing the same and lithium rechargeable battery using the material

摘要

A composite anode active material includes a first intermetallic compound, a second intermetallic compound, a metal that is incapable of alloy formation with lithium, and carbon. In the composite anode active material, an amorphous carbon is present between the first intermetallic compound and the second intermetallic compound, and the metal that is incapable of alloy formation with lithium is uniformly distributed throughout in the composite anode active material. The composite anode active material may be used as an anode of a lithium rechargeable battery.

主权项

1. A composite anode active material of a lithium rechargeable battery, comprising:
a first intermetallic compound; a second intermetallic compound; molybdenum; and carbon; wherein the first intermetallic compound and the second intermetallic compound exist in different phases, wherein the first intermetallic compound and the second intermetallic compound are crystalline, and wherein the first intermetallic compound includes Sn and Fe, and the second intermetallic compound includes Sn, Fe, and C, and wherein the composite anode active material includes 10 to 90 parts by weight of Fe, about 0.1 to about 20 parts by weight of Mo, and about 10 to about 50 parts by weight of C, based on 100 parts by weight of Sn.