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Nickel oxide film with open macropores prepared by anodic deposition in the presence of surfactant shows a very high capacitance of 1110 F g(-1) at a scan rate of 10 mV s(-1), and the capacitance value reduces to 950 F g(-1) at a high scan rate of 200 mV s(-1).

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Vapor-grown carbon nanofibers ͑VGCFs͒ coated with highly regulated nickel oxide nanoflakes are deposited onto the stainless steel substrate by one-step anodic deposition in a plating bath containing surfactant ͓sodium dodecyl sulfate ͑SDS͔͒. The adsorption of SDS on the VGCF surface improves the dispersion and electrodeposition of VGCFs in an aqueous electrolyte. Electrodeposition of VGCFs is accompanied by anodic deposition of nickel oxide nanoflakes on the surface of substrate and VGCFs. Nickel oxide appears to be suitable as a conducting binder for attaching VGCFs. A NiO-coated VGCF electrode exhibits excellent capacitive behavior compared with a bare NiO electrode, resulting from the enhanced electrical conductivity.