Porosity-tuned NiO nanoflakes: Effect of calcination temperature for high performing supercapacitor application
By Mondal, M.; Das, B.; Howli, P.; Das, N. S.; Chattopadhyay, K. K.
Published in Journal of Electroanalytical Chemistry
2018
Abstract
Aiming to achieve low cost energy storage applications by green technology, NiO nanoflakes have been synthesized using simple wet chemical route. Variation of calcination temperature is employed to pierce nanoholes within the nanoflakes to obtain higher effective surface area. All the samples are characterized by X-ray diffraction for phase related information. Samples are investigated via field emission scanning electron microscopy and high resolution transmission electron microscopy for morphological features whereas compositional analysis has been carried out using energy dispersive X-ray studies. Electrochemical performances of the as-prepared samples are investigated in detail to predict the potential application of this system in energy storage devices. It is observed that pore diameter and density may be enhanced with increment in calcination temperature. NiO nanowalls with the highest effective surface area (83.940 m2/g) synthesized at 900
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