COMPOSITE FOIL FOR NEGATIVE ELECTRODE CURRENT COLLECTOR OF NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING THE SAME, NEGATIVE ELECTRODE CURRENT COLLECTOR USING THE COMPOSITE FOIL, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PPROBLEM TO BE SOLVED: To provide a composite foil which exhibits high tensile strength even after a high-temperature heat treatment and is suitably used as a negative electrode current collector for a nonaqueous electrolyte secondary batteries. PSOLUTION: The following composite foils (1) and (2) are employed for the metallic foil for the negative electrode current collector for the nonaqueous electrolyte secondary batteries. A cobalt plating layer or a cobalt-nickel alloy plating layer is preferably formed on the surface of a copper foil so that it has a thickness of 0.5 to 5.0 m. (1) The composite foil obtained by forming a cobalt plating layer on the surface of a copper foil. (2) The composite foil obtained by forming a cobalt-nickel alloy plating layer on the surface of the copper foil. PCOPYRIGHT: (C)2006,JPO&NCIPI