| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy foil current collector for a secondary battery with high conductivity and high tensile strength. SOLUTION: This current collector is made of a copper alloy having an alloy composition of 95 wt.% or more copper and 0.01-5 wt.% at least one element selected from the group comprising iron, nickel, chromium, phosphorus, tin, and zinc. The thickness of the copper alloy foil current collector is preferable to be 8-25 μm, and the tensile strength is preferable to be 500 N/mm<2> . The copper alloy foil current collector is preferable to be used in a lithium ion secondary battery using a carbon base material such as carbon as a negative active material. |
