Speaker
Mr
Abdulmajid A. Mirghni
(UP)
Description
This work presents the effect of different contents of graphene foam (GF) on the electrochemical capacitance of nickel phosphate Ni3(PO4)2 nanorods as an electrode material for supercapacitor applications. Ni3(PO4)2 nanorods were synthesized via a hydrothermal method followed by different mass loading of graphene (30, 60, 90 and 120 mg, denoted as Ni3(PO4)2/30 mg GF, Ni3(PO4)2/60 mg GF, Ni3(PO4)2/90 mg GF and Ni3(PO4)2/120 mg GF, respectively. The electrochemical behavior of Ni3(PO4)2 and Ni3(PO4)2/GF nanorods composites were analyzed in a three-electrode cell using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) in a 6 M KOH electrolyte. The electrochemical tests showed that the specific capacitance increased with increasing the GF content up to 90 mg then decreased. The Ni3(PO4)2/90 mg GF exhibited the highest specific capacitance of 606 F g-1 (using CV curve) and 462 F g-1 (using CD curve) at 5 mV s-1 scan rate and 0.5 A g-1 current density respectively. The high specific capacitance is attributed to good crystallinity and synergetic interaction of the GF and Ni3(PO4)2 nanorods.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Main supervisor (name and email)<br>and his / her institution
Ncholu Manyala, ncholu.manyala@up.ac.za, University of Pretoria
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Primary author
Mr
Abdulmajid A. Mirghni
(UP)
Co-authors
Mr
Kabir O. Oyedotun
(UP)
Dr
Moshawe J. Madito
(UP)
Prof.
Ncholu Manyala
(UP)
Mrs
Ndeye M. Ndiaye
(UP)
Dr
Tshifhiwa M. Masikhwa
(UP)
