8-12 July 2013
Africa/Johannesburg timezone
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DFT+U study of Li adsorption on (110) β-MnO2 surface

Presented by Ms. khomotso MAENETJA on 12 Jul 2013 from 09:20 to 09:40
Type: Oral Presentation
Session: DCMPM1
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Lithium-air batteries are actively being developed worldwide because of their potential to deliver ultra-high energy density. Currently, the li-ion batteries are being used in electric vehicle however; their energy is much lower than that of Li-air batteries. Density Functional Theory is used to investigate lithium adsorbed manganese dioxide surfaces in the context of lithium-air battery development. In this study, we calculate the surface energies of low Miller index planes and the most stable surface orientation was found to be the (110). It was observed that the triply-coordinated lithium, bonded to two bridging and one in-plane oxygen atoms (bbp) has lowest adsorption energy which is the favorable site. Surface oxidation becomes favorable when concentration of lithium adsorbets increases at the surface of which bridging-peroxo is most stable.

Award

No

Level

MSc

Supervisor

(P. E Ngoepe phuti.ngoepe@ul.ac.za) University of Limpopo

Paper

No

Place

Location: A2-75


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