CURRENT COLLECTOR, BATTERY AND METHODS FOR PRODUCING THE SAME

A current collector in which, even in the case of using a copper substrate, an electroconductive layer comprising a thermoplastic resin and an electroconductive material and covering the copper substrate provides the same positive temperature coefficient resistance function as the case of using an aluminum substrate. The current collector may comprise: a copper substrate comprising a copper oxide layer that an average content of an oxygen element present within a thickness of 1.0 μm or less from a surface of the copper substrate, is 10.5 at % or more, and a positive temperature coefficient resistance layer comprising a thermoplastic resin and an electroconductive material and covering the copper oxide layer of the copper substrate.