Speaker
Mrs
Ndeye Maty Ndiaye
(UP)
Description
In this work, we report the time-dependent synthesis of VO2 microspheres and nanosheets by hydrothermal method with a systematic improvement in physical and electrochemical properties such as specific surface area and specific capacitance at synthesis time of 6 h. VO2 microspheres and nanosheets were characterized by SEM, BET and XRD. The results show that variation of reaction time plays a crucial role in the transformation of samples morphology. VO2 microspheres synthesized within 4 h represents the intermediate reaction time between VO2 microsphere and nanosheets. VO2 grown at 6 h under the same synthesis conditions exhibited the highest specific capacitance of 485 F g-1 at a current density of 0.5 A g-1 in 6 M KOH electrolyte using Ni foam as a current collector and also showed excellent stability with ~ 98.5 % capacitance retention after 1000 cycles at a current density of 10 A g-1. Based on the above results, the VO2 nanosheets show a considerable potential as electrode materials for supercapacitor applications.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Main supervisor (name and email)<br>and his / her institution
Prof. Ncholu Manyala, Ncholu.Manyala@up.ac.za, University of Pretoria, Hatfield, Pretoria.
Primary authors
Prof.
Ncholu Manyala
(UP)
Mrs
Ndeye Maty Ndiaye
(UP)
Co-authors
Prof.
Aboubaker C Beye
(UCAD)
Prof.
Balla Diop Ngom
(UCAD)
Dr
Jack. Madito Madito
(UP)
Dr
Julien K Dangbegnon
(UP)
Mr
Kabir O. Oyedotun
(UP)
Dr
Tshifhiwa Masikhwa
(UP)
