Anodic electrodeposition of a porous nickel oxide-hydroxide film on passivated nickel foam for supercapacitors

The response current of Ni foam in alkaline solutions can be reduced significantly by high-temperature annealing, making it more suitable for current collectors, and a porous NiO(OH) film deposited on the passivated 3D Ni foam by anodic electrodeposition shows an ultrahigh specific capacitance of 2302 F g(-1) at 1 A g(-1).