Speaker
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
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>
Recently, one of the greatest scientific and engineering problems is the realization of a highly efficient energy and storage systems. Electrode materials are key to enhancing performance in a number of important energy storage technologies such as supercapacitors and batteries. Electrochemical capacitors also known as supercapacitors or ultracapacitors have become attractive and suitable in energy storage systems due to their extremely high power performance, moderate energy density and excellent cycle life. Ni(OH)2 has been identified as one of the most interesting transition metal hydroxide material owing to its easy synthesis, low cost and high theoretical capacitance. Thus, the design and synthesis of the nanoscale Ni(OH)2 based electrodes for high performance supercapacitors ha attracted many attentions. In this work, we explore the synthesis of Ni(OH)2-graphene foam (GF) composite via a facile hydrothermal reflux technique, and have investigated its potential use for supercapacitor application. The results obtained from the scanning electron microscopy showed that Ni(OH)2 spheres were uniformly distributed on the surface of the graphene foam. The specific capacitance of Ni(OH)2-GF composite electrode was found to be 2420 F/g at a current density of 1 A/g with a coulombic efficiency of ~93% after 1000 charge/discharge cycles, demonstrating excellent cycle stability in 6.0 M KOH aqueous electrolyte. These results suggest that Ni(OH)2-GF composite could be a potential electrode material for high performance electrochemical applications.
Main supervisor (name and email)<br>and his / her institution
Prof Ncholu I. Manyala,manyalancholu@gmail.com, University of Pretoria
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
No
