Speaker
Ms
Mogahabo Morukuladi
(UL)
Description
Rechargeable metal–air batteries are widely regarded as the next best generation of high energy density electrochemical storage devices. The performance and rechargeability of these metal–air batteries is highly dependent on the stability and performance of the positive electrode materials, where oxygen reduction and evolution reactions occur. Due to the high cost and limited resources for lithium-ion batteries, sodium air batteries are a promising alternative because of their high theoretical energy density and low cost to meet the rapidly increasing global energy demands. Graphene has shown a great potential in electrochemical energy storage and conversion due to its remarkable properties. In this work, density functional theory (DFT) methodologies are used to investigate the reaction mechanisms of sodium oxides being adsorbed onto graphene surface. Generalized gradient approximation (GGA) as implemented in density functional theory was used to perform the calculations, employing CASTEP code. The four discharge products namely; Na2O2, NaO2, Na2O and NaO were adsorbed onto graphene layer. Our results show that Na2O is the most stable discharge product due to its lower adsorption energy.
Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.
P.E Ngoepe
University of Limpopo
phuti.ngoepe@ul.ac.za
| Consideration for<br>student awards<br><b>Choose one option<br>from those below.</b><br>N/A<br>Hons<br>MSc<br>PhD | Hons |
|---|---|
| Please confirm that you<br>have carefully read the<br>abstract submission instructions<br>under the menu item<br>"Call for Abstracts"<br><b>(Yes / No)</b> | Yes |
Primary author
Ms
Mogahabo Morukuladi
(UL)
Co-authors
Mr
Phala Masoga
(UL)
Prof.
Phuti Ngoepe
(UL)
Prof.
Regina Maphanga
(Csir)
