Aluminum foil for current collector of lithium ion battery, current collector of lithium ion battery and lithium ion battery

摘要

PPROBLEM TO BE SOLVED: To provide an aluminum foil for collector, having a high adhesiveness and a low contact resistance to an electrode active material, and to provide a collector and a secondary battery using the aluminum foil. PSOLUTION: The aluminum foil for collector has a surface finally cleaned with acidic solution including hydrofluoric acid. The residual carbon content on the finally cleaned surface is 0.3 mg/mSP2/SPor lower. An oxide film having 0.2 V to 1.5 V membrane withstand voltage resistance is formed on the surface. The tensile strength is 98 Mpa or higher. The thickness is 9 m to 100 m. Aluminum of 96.5-99.9 mass%, manganese of 1.5 mass% or lower, iron of 1.5 mass% or lower, silicon of 0.7 mass% or lower, and copper of 0.2 mass% or lower are included. The total content of manganese, iron, silicon and copper is 0.1 mass% or higher and under 3.5 mass%. PCOPYRIGHT: (C)2004,JPO&NCIPI