Cleaning with ethanol followed NMP is sufficient for use in anodes of LIBs.  As Mr. Chen suggested rough surface is good for adhesion between your composite active material and current collector.

CMP - chemical mechanical polishing.

Hi Saranya,

As current collector for LIB, I don't think it is necessary to use a Cu foil with very smooth surface. For regular Cu foil that commercial available, perform the basic clean is good enough to go without further smoothing stets. In addition, the relative rough current collector surface is good for the adhesion between electrode materials and current collector. 

Thank you Alan.

Chen, rough current collector facilitates growth of dendrites when using Li metal battery

Cleaning with ethanol followed NMP is sufficient for use in anodes of LIBs.  As Mr. Chen suggested rough surface is good for adhesion between your composite active material and current collector.

I support the advice of Surendra. The polution on the Cu is probably only organic and can betaken of with the ethanol + NMP.  please use seltipur grade or higher so you aren't poluting the Cu agian an watch out with other polution sources like your hand and environmental polution. Sometimes you don't clean but polute if you don't watch out. 

I suggest checking the foil before the experiment using diluted HCl which will remove all of the CuO. I necessary you see the difference. If the surface is smooth you will have a Cu mirror (for a limited time)

Is the suggestion above limited only for Copper foil? How about if I use Aluminum foil? Is there any method that I can use to treat the Al foil? Thank you for your respond.