Electrodeposition of Zn-doped α-nickel hydroxide with flower-like nanostructure for supercapacitors

► Zn-doped α-nickel hydroxide with flower-like nanostructures are synthesized by electrochemical deposition method. ► XRD spectra indicate nickel hydroxide doped with Zn is α-Ni(OH)2 with excellent crystallization. ► The formation of Zn-doped Ni(OH)2 include two steps: a honeycomb-like film forms on the substrate first, then flower-like particles forms on the films.