Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Synthesis, characterization and electrochemical performance of ZnxNi1-x(OH)2 nanostructured layered double hydroxide active material for supercapacitors

Authors
Mahdi Kazazi 1
Simin Askari 2
Mahya Naghdi 3
Shahab Moghadas 4
1 Malayer University, Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran
2 Malayer University, Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer Iran.
3 Malayer University, Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran.
4 Materials and Energy Research Center, Ceramic Division, Karaj, Iran
10.30501/jamt.2637.70320
Abstract
In this research, ZnxNi1-x(OH)2 nanostructured layered double hydroxide active materials were successfully synthesized by a chemical co-precipitation route using polyethylene glycol as the structure-directing reagent. Structural characterizations were performed using X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR), and morphology of materials was obtained by Field Emission Scanning Electron Microscopy (FESEM). The results show that the as-prepared materials have a porous structure with nanoscale walls and their crystal structure was mainly α-phase. Electrochemical experiments using cyclic voltammetry, galvanostatic charge-discharge and cyclability show that Zn0.33Ni0.67(OH)2 active material has the highest initial specific capacitance of 926 F g-1 at a current density of 1 A g-1 and a capacity retention of about 98% after 100 charge-discharge cycles.
Keywords
Supercapacitors
nickel-zinc layered double hydroxide
electrochemical performance
Co-precipitation
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  • Receive Date 17 December 2015
  • Revise Date 30 May 2016
  • Accept Date 12 June 2016