| 摘要 |
PROBLEM TO BE SOLVED: To provide aluminum alloy foil for a lithium secondary battery, which is used for the positive electrode material of the lithium ion secondary battery, in which cutting and peeling of an active material are not caused since failure such as deformation and fracture are hardly caused when the active material is applied, and also, upon its storage into a case as a wound body, which has satisfactory storage property into the case, since its repulsion force is small. SOLUTION: The aluminum alloy foil for the lithium ion secondary battery has a composition composed of, by mass, 0.01 to 0.60% Si, 0.2 to 1.0% Fe, 0.05 to 0.50% Cu and 0.5 to 1.5% Mn, and the balance Al with inevitable impurities. The aluminum alloy foil is characterized in that tensile strength is≥240 MPa, proof stress after heat treatment at 100°C for 30 min is≤270 MPa, and the tensile strength after heat treatment at 180°C for 30 min is≥200 MPa. There is also provided a method for producing the aluminum alloy foil for the lithium ion secondary battery. COPYRIGHT: (C)2011,JPO&INPIT |
