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Combined density functional theory and molecular dynamics study of Sm0.75A0.25Co1-xMnxO2.88 (A = Ca, Sr; x = 0.125, 0.25) cathode material for next generation solid oxide fuel cell

Olsson, Emilia, Cottom, Jonathon, Aparicio-Anglès, Xavier and de Leeuw, Nora H. 2020. Combined density functional theory and molecular dynamics study of Sm0.75A0.25Co1-xMnxO2.88 (A = Ca, Sr; x = 0.125, 0.25) cathode material for next generation solid oxide fuel cell. Physical Chemistry Chemical Physics 22 (2) , pp. 692-699. 10.1039/C9CP04892H

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Abstract

One of the main challenges facing solid oxide fuel cell (SOFC) technology is the need to develop materials capable of functioning at intermediate temperatures (500–800 °C), thereby reducing the costs associated with SOFCs. Here, Sm0.75A0.25MnxCo1−xO2.88 (A = Ca, or Sr) is investigated as a potential new cathode material to substitute the traditional lanthanum–strontium manganate for intermediate temperature SOFCs. Using a combination of density functional theory calculations and molecular dynamics simulations, the crucial parameters for SOFC performance, such as the electronic structure, electronic and ionic conductivity, and thermal expansion coefficient, were evaluated. An evaluation of the results illustrates that the conductivity and thermal match of the materials with the electrolyte is dramatically improved with respect to the existing state-of-the-art.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 1463-9076
Funders: EPSRC
Date of First Compliant Deposit: 3 January 2020
Date of Acceptance: 24 October 2019
Last Modified: 06 Jan 2020 15:15
URI: http://orca.cf.ac.uk/id/eprint/128173

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