Speaker
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
Main supervisor (name and email)<br>and his / her institution
Prof. Phuti Ngoepe Phuti.ngoepe@ul.ac.za University of Limpopo
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
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>
Particle size reduction (mm to nm) is one of the strategies identified to shorten the electron and lithium ion diffusion paths in cathodes materials for lithium-ion batteries. Its implementation has resulted in enhanced rate capability, improved cycling stability and electrochemical performance of LiMn2O4 [1]. The armorphization and recrystallization technique is a practical tool to compliment annealing in experiments. It was previously employed to generate nano-architectures of binaries such as MnO2 [2] and will be used in the current study on the spinel. Analysis of atomic crystal structures and microstructures of the resulting models, revealed presence of the spinel LiMn2O4 polymorph, rutile-MnO2 and layered-Li2Mn O3 in the nanosheet LiMn2O4. The highly defected structures revealed vacancies and comprise substitutions of Li and Mn in different layers, which suggest possible mechanisms for Li mobility. The calculated XRD compare favourably with measured XRD providing valuable insights of the atomistic models and supporting observations in microstructural features.
