Patent ID: 8029932

Claim:
An anode comprising an anode active material layer containing silicon that is provided on an anode current collector, wherein the anode current collector has a base material and a projection formed on the base material, the base material of the anode current collector having a ten point height of roughness profile, Rz 1 , on a face on which the anode active material layer is provided, the anode current collector having a ten point height of roughness profile, Rz 2 , on a face on which the anode active material layer is provided, and wherein Rz 1 is about 0.8 μm or less, Rz 2 is from about 0.7 μm to about 5.6 μm, and a difference obtained by subtracting Rz 1 from Rz 2 ranges from 0.2 μm to 5.1 μm.