Patent ID: 7838147
Filing Date: 2010-11-23
Classification: H01M,Y02E,Y02P

Abstract:
1. An electrode comprising: a current collector containing at least one from the group consisting of copper (Cu), nickel (Ni), titanium (Ti), iron (Fe), and chromium (Cr); an active material layer on said current collector containing at least one of silicon (Si), germanium (Ge) and compounds thereof; and a thin film layer on a portion of a surface of the active material layer containing at least one of copper and nickel provided on the active material layer, wherein, the active material layer and thin film layer are on either or both sides of the current collector, at an interface between at least one of said active material layers and said current collector they are alloyed together, and the thin film layer comprises several layers and the layer in contact with the active material layer is made of a metal material which alloys with silicon or germanium and the other layers are made of one or more metal materials different than that of the layer in contact with the active material layer.