3D graphene hydrogel (GH) provides a promising support for electrodepositing PANI, and the supercapacitor based on GH/PANI conformal heterostructure displays high energy and power densities.
Leaf-like CuO–Cu2O nanosheets have been prepared on copper foam by a one-step simple anodization method, which can be used as an advanced binder-free supercapacitor electrode.