Bulletin of Materials Science

, 42:265 | Cite as

Morphology-dependent electrochemical performances of nickel hydroxide nanostructures

  • Karthik S BhatEmail author
  • H S Nagaraja


Electrochemical capacitors form part of the developing technologies in the field of alternative energy sources. In the present work, nickel hydroxide (\(\hbox {Ni(OH)}_{2}\)) nanosheets and microflowers are hydrothermally prepared employing different chemical precursors. Structure, morphology and chemical analysis are conducted using powder X-ray diffraction, field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy measurements. Electrochemical performances as supercapacitor electrodes of the synthesized nanostructures are evaluated through cyclic voltammetry and galvanostatic charge–discharge measurements with three-electrode configurations. The results indicated the specific capacitance of 180 and \(417\ \hbox {F g}^{-1}\) at a scan rate of \(5\ \hbox {mV}\ \hbox {s}^{-1}\) for \(\hbox {Ni(OH)}_{2}\) nanosheets and microflowers, respectively. The higher specific capacitances for \(\hbox {Ni(OH)}_{2}\) microflowers could be attributed to the higher specific surface area, morphology, electronic conductivity and porosity. Both \(\hbox {Ni(OH)}_{2}\) nanostructures exhibited good capacitance retention for 1500 cycles.


Hydroxides nickel hydroxide supercapacitors nanosheets microflowers 


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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of PhysicsNational Institute of Technology KarnatakaMangaluruIndia

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