Speaker
Description
One of the major limitations associated with spinel LiMn2O4 despite its superior properties such as high voltage, great cycling performance, being environmentally friendly and cost-effective is the impact of the stress it endures through strain during the process of cycling. For that reason, this study seeks to understand the implications that come with stress-strain and how it affects the mechanical properties of a battery material; and eventually come with a better nanoporous structure that can withstand these harsh conditions.
Herein, the amorphisation and recrystallisation technique were used to simulate the Li-Mn-O nanoporous structures of different lattice sizes at 75, 69 and 67 Å and varying lithium concentrations, (Li1+XMn2O4, 0 ≤ X ≤ 1) using the DL_POLY code. Recrystallisation of the nanoporous structures resulted in single and multiple grained materials with microstructures that shows a profusion of point defects. Furthermore, the microstructures capture the spinel layered composites which are also validated by the X-ray diffraction patterns of these structures. The stress and strain analysis shows that nanoporous 69 Å has the highest yield strength compared to its nanoporous counterparts. This, therefore, implies that nanoporous 69 Å is more robust and can be a better candidate to help restrict battery hazards in the future as far as fracture is concerned.
Level for award;(Hons, MSc, PhD, N/A)?
PhD
Apply to be considered for a student ; award (Yes / No)?
Yes
