One-step Facile Preparation of High Performance Ni(OH)2 Nanoparticles/Mesoporous Carbon Nanocomposite: Electrochemical Synthesis and Properties

Ni(OH)2 /mesoporous carbon composite was successfully deposited onto Ni foam by electrochemical deposition under ambient conditions. Using a simple electrochemical deposition (ECD) method, nickel hydroxide nanoparticles (NPs) was electrochemically formed onto mesoporous carbon structures (CMK). The surface morphology and crystallinity properties of the synthesized Ni(OH)2 NPs/CMK onto Ni foam are characterized by physicochemical techniques of XRD and FE-SEM. Furthermore, the deposited β-Ni(OH)2 NPs/CMK on Ni foam reveal superior energy storage ability in 1M KOH electrolyte as a binder-free electrode for pseudocapacitors. Compared to the Ni(OH)2@NF electrode, the composite sample (Ni(OH)2/CMK@ NF electrode) exhibit a relatively high electrochemical performance (Cs=1224 F g–1 at 2 A g–1) and stable Cs retention (94%) after 3000 GCD cycling, which was ascribed to the electronic and ionic synergisms between β-Ni(OH)2 NPs and mesoporous carbon material of Ni electrode. This cost-effective and in situ electrochemical growth of metal hydroxide nanostructures on carbonous structures may be useful for advanced energy storage device applications.