Nano hexagons of CuO are synthesized by rapid hydrothermal method.
Nano CuO anode delivers stable capacity of ∼575 mAh g−1 beyond 100 cycles.
CuO anode exhibits zero capacity fading at 215 mA g−1current density.
Nano CuO anodes are cycleable up to the current density of 4.3 A g−1.
Micro level interconnected framework formed facilitates stable cycling performance.