Preparation of 3D rose-like NiO complex structure and its electrochemical property

Abstract The reaction of nickel chloride and sodium acetate under solvothermal conditions produced Ni(OH) 2 nanoplatelets, which are self-assembled to form a 3D rose-like morphology. After calcination, NiO nanoplatelets were obtained and inherited the rose-like morphology of Ni(OH) 2 precursor. The influences of PEG and reaction temperature on the size and morphology of NiO were investigated. The functions of PEG on the formation of the NiO nanoplatelets and the self-assembly process were discussed. Moreover, the possible mechanism for the formation of rose-like morphology was proposed. The cyclic voltammetry (CV) measurement showed that as-prepared NiO with a rose-like morphology exhibited a good pseudo-capacitance behavior.