Patent ID: 8906554

Claim:
An anode active material composition comprising: a composite material consisting of a carbon-based anode active material, a metal-based anode active material, and crosslinked elastic polymer particles, wherein an amount of the metal-based anode active material is in the range of from 1 to 100 parts by weight, with respect to 100 parts by weight of the carbon-based anode active material, the crosslinked elastic polymer particles comprise at least one selected from the group consisting of a polystyrene-based polymer, a poly(meth)acrylate-based polymer, a polyurethane-based polymer, polyvinylalcohol-based polymer, and a polyolefin-based polymer, or a copolymer or a crosslinked polymer of at least two polymers selected from the group consisting of a polystyrene-based polymer, a poly(meth)acrylate-based polymer, a styrene-butadiene-based copolymer, a polyurethane-based polymer, a polyvinylalcohol-based polymer, and a polyolefin-based polymer; and a binder.