Hierarchically nanostructured CuO-Cu current collector fabricated by hybrid methods for developed Li-Ion batteries

Abstract

We present a simple method of fabricating a hierarchically nanostructured CuO-Cu current collector by using laser ablation and metal mold imprinting to maximize the surface area. The laser ablation of the Cu current collector created the CuO nanostructure on the Cu-collector surface. The microstructure was transferred by subsequent imprinting of the microstructure metal mold on the Cu collector. Then, the laser-ablation nanostructure was formed. Consequently, a hierarchical structure is generated. The laser-ablated hierarchical CuO-Cu current collector exhibited an improved capacity while maintaining a cyclability that is similar to those of conventional graphite batteries.