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|1. (WO2018034184) COPPER ALLOY FOIL|
|Applicants:||FURUKAWA ELECTRIC CO., LTD.
UACJ FOIL CORPORATION
|Title:||COPPER ALLOY FOIL|
The purpose of the present invention is to address the problem set forth in the description, by providing a copper alloy foil that exhibits both electrical conductivity and heat resistance. The present invention also provides a copper alloy foil that, when used for the negative electrode current collector of a secondary battery, exhibits an improved adherence to the active substance layer. The copper alloy foil contains 0.005 to 0.015 wt% Sn and has an oxygen content of not more than 0.0020 wt% with the remainder comprising Cu and unavoidable impurities. An Sn-rich layer is formed in at least one of the surface layers of the copper alloy foil.