NDLI: Electrosynthesis of highly porous NiO nanostructure through pulse cathodic electrochemical deposition: heat-treatment (PCED-HT) method with excellent supercapacitive performance

Content Provider	Springer Nature Link
Author	Aghazadeh, Mustafa Ganjali, Mohammad Reza
Copyright Year	2017
Abstract	A highly porous NiO nanostructure is prepared through a pulse cathodic electrochemical deposition/heat-treatment (PCED-HT) method. Based on the method first a hydroxide precursor was deposited from an additive-free 0.005 M Ni(NO$_{3}$)$_{2}$ through a pulse–base-electro-generation procedure. The pulsed deposition experiments were performed at t$_{on}$ = 1 s, t$_{off}$ = 1 s, i$_{peak}$ = 50 mA cm$^{−2}$, T = 80 °C and 30 min. The green hydroxide powder was then calcined at 500 °C for 3 h and to obtain a black oxide powder. The mechanisms for the deposition of the nickel hydroxide precursor during the PCED step, as well as that of the formation of the final oxide product during the HT step were studied. The structural and morphological properties of the product were evaluated through XRD, IR and SEM. The results revealed the precursor and the product to be porous β-nickel hydroxide and porous cubic crystalline nickel oxide nanostructures, respectively. The super-capacitive performance NiO-based electrode was evaluated by cyclic voltammetry and the galvanostatic charge–discharge techniques in 1 M KOH electrolyte. It was observed that the fabricated porous NiO electrode exhibits capacitive behavior of low ΔE$_{p}$ value of 32 mV and width potential window (ΔV = 0.8 V), and is capable to deliver high specific capacitance of 1056.4 F g$^{−1}$ and capacity retention of 89.7% after 3000 GCD cycles at current load of 3 A g$^{−1}$, and energy density and power density as high as 82.3 Wh/Kg and 0.60 W/g, respectively.
Starting Page	8144
Ending Page	8154
Page Count	11
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	28
Issue Number	11
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2017-02-14
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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