Flexible Bimetallic Nanoporous Cu-Ag Synthesized by Electrochemical Dealloying for Battery-Type Electrodes with High Electrochemical Performance.

In this work, a flexible three-dimensional nanoporous bimetallic Cu-Ag (NPCuAg) has been fabricated by a simple electrochemically dealloying Zr₄₅Cu₃₅Ag₂₀ glassy ribbon in HF aqueous solution. The influence of dealloying treatment time on the thickness of nanoporous layer and the flexibility of the dealloyed ribbon was investigated. It is found that the thickness of NPCuAg is approximately proportional to dealloying treatment time, and the NPCuAg shows a maximum nanoporous layer ***9 μm (one side) while possessing good flexibility. Furthermore, nanoporous CuOAg (NPCuOAg) was obtained through a simple oxidation treatment. The NPCuOAg shows a hierarchical structure where CuO nanosheets are uniformly embedded in 3D nanoporous Ag skeleton. The NPCuOAg battery-type electrode exhibits superior electrochemical performance, which has great potential application in flexible high-performance energy storage devices. [ABSTRACT FROM AUTHOR]