Apply to be<br> considered for a student <br> award (Yes / No)?
Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
Nickel-Aluminum double hydroxide microspheres (NiAl-DHMs) are a promising electrode material for supercapacitor applications. In this paper, we demonstrate an ex-situ coating method of the active material on Nickel foam-Graphene (NF-G) template serving as a current collector. The structure and surface morphology are studied by scanning and transmission electron microscopies, Raman Spectroscopy and X-ray diffraction analysis. The supercapacitive performance of the microspheres is investigated by cyclic voltammetry (CV), constant charge-discharge (CD) and electrochemical impedance spectroscopy (EIS) measurements. Results show a better surface interaction of the Ni-Al DHM material with the surface of the NF-G template compared with bare Nickel foam (NF) due to an increased contact area. The composite electrode with graphene gives a specific capacitance of 1252 F g-1 at a current density of 1 A g-1. The capacitance retention is about 97 % after 1000 charge-discharge cycles which provides a promising electrode material applicable in the design of energy storage devices.
Level for award<br> (Hons, MSc, <br> PhD)?
Main supervisor (name and email)<br>and his / her institution
Prof. Ncholu Manyala,
University of Pretoria
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?