Composite anode active material, anode including the same and lithium battery using the anode

摘要

A composite anode active material includes a composite of a carbon-based anode active material, a metal-based anode active material and polymer particles. By increasing the conductivity of the composite anode active material, a lithium battery having a large capacity, high initial efficiency, high rate capability and improved cycle life performance can be obtained. An anode includes the composite anode active material and a lithium battery includes the anode.

主权项

1. 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.