Preparation of porous copper foil by copper-zinc alloy electrodeposition and dealloying
[Introduction]Nanoporous copper has great potential for applications in energy storage,catalyst,sensor,and other fields due to its unique physicochemical properties i.e.open porous structure,high specific surface area,and low density.In order to solve the problems such as lithium dendrite and low safety existing in lithium-ion batteries using lithium as anode material,the preparation of porous copper foil by dealloying method has become a hot research topic in recent years.[Method]A porous copper foil was obtained by electrodepositing of copper foil based on a titanium plate,followed by electrodeposition of Cu-Zn alloy,and then dealloying.The effects of different process parameters on the morphology,microstructure,and properties of Cu-Zn alloy coatings were studied.[Result]The electrodeposition conditions were optimized as follows:current density 1.0 A/dm2,temperature 40℃,and time 20 min.The Cu-Zn alloy coating obtained under the optimized conditions was smooth and uniform with a single alloy phase,and 70.6%of Zn was removed after dealloying.[Conclusion]Porous copper foil with uniform size of pores can prepared by combination of electrodeposition and dealloying,but some cracks may appear,which needs further research and improvement.
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