METHOD AND SYSTEM FOR COPPER COATED ANODE ACTIVE MATERIAL

A method and system for copper coated anode active material may include providing a metal current collector; an active material layer on the current collector, the active material layer comprising at least 50% silicon by weight, a pyrolyzed carbon source; and a layer of metal on the active material layer that increases conductivity of the layer. The surface may be opposite to a surface of the active material layer that is coupled to the current collector. The layer of metal may comprise copper. The silicon may comprise particles ranging in size from 2 to 50 μm. The metal layer may comprise islands of metal on the silicon particles. The islands of metal may have a thickness of 100 nm or less. The islands of metal may be less than 50 μm across. A conductivity of the anode active material layer and layer of metal may be less than 2×10Ω-cm.