Patent ID: 6815003
Filing Date: 2004-11-09
Classification: H01M,Y02E,Y10T

Abstract:
A method for fabricating an electrode for lithium secondary battery, comprising the steps of:roughening a surface of a metallic foil through wet-etching; and depositing a thin film by sputtering, CVD, vacuum evaporation, thermal spraying, electric plating or electroless plating on the roughened surface of the metallic foil, which is a current collector, so as to form irregularities on the surface of the thin film corresponding to irregularities on the roughened surface of the metallic foil, the thin film being any one of an amorphous silicon thin film, a microcrystalline silicon thin film, an amorphous germanium thin film, a microcrystalline germanium thin film, an amorphous silicon-germanium alloy thin film, and a microcrystalline silicon-germanium alloy thin film; and forming gaps in the thin film in a manner to extend in its thickness direction from valleys of the irregularities of the thin film surface when the thin film is expanded and shrunk due to a charge/discharge reaction.