Three-dimensionalization of ultrathin nanosheets in a two-dimensional nano-reactor: Macroporous CuO microstructures with enhanced cycling performance

Three-dimensional (3D) macroporous CuO structures composed of ultrathin nanosheets were successfully synthesized by employing a liquid-liquid interface as a two-dimensional (2D) nano-reactor. The macroporous structure helped CuO to retain the exposed surface during reactions, thus significantly enhancing the long term cycling performance both in photocatalysis and lithium ion batteries.