Dandelion-like CuO wrapped by rGO nanosheets have been prepared.
The wrapping of rGO contributes to improve the electrochemical performance.
The CuO-rGO electrode exhibits a specific capacitance of 296 F g−1 at 1 A g−1.
The capacitive retention reaches 96.1% after 2000 cycles at 2 A g−1.