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Mathematical modelling of direct borohydride fuel cells

Mathematical modelling of direct borohydride fuel cells
Mathematical modelling of direct borohydride fuel cells
A detailed mathematical model for the direct borohydride/O2 fuel cell is developed. The activation polarizations, mass-transport limitations and resistances to charge transport in each component of the cell are explicitly incorporated. The anode kinetic mechanism is based on direct borohydride oxidation, borohydride hydrolysis and the full Tafel-Volmer-Heyrovsky mechanism for hydrogen evolution and oxidation. The mixed potential at the anode is calculated using the mixed-potential theory. The model results are compared to experimental data across a range of operating conditions and component properties, including the reactant concentrations, the anolyte flow rate, the ionomer volume fractions and the membrane/ionomer conductivity. A good qualitative fit to the experimental data is demonstrated. In order to gain insight into the anode reaction mechanism, the performance on both Pt and Ni anodes is simulated and compared to experimental observations. A detailed analysis of the results provides an explanation for the different performance on these catalysts.
0378-7753
157-171
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Singh, R
9343c79b-439e-4a8a-ae4d-dc0220ea57ef
Ponce de Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Wills, R. G.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Walsh, F. C.
309528e7-062e-439b-af40-9309bc91efb2
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Singh, R
9343c79b-439e-4a8a-ae4d-dc0220ea57ef
Ponce de Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Wills, R. G.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Walsh, F. C.
309528e7-062e-439b-af40-9309bc91efb2

Shah, A.A., Singh, R, Ponce de Leon, C., Wills, R. G. and Walsh, F. C. (2013) Mathematical modelling of direct borohydride fuel cells. Journal of Power Sources, 221, 157-171. (doi:10.1016/j.jpowsour.2012.07.083).

Record type: Article

Abstract

A detailed mathematical model for the direct borohydride/O2 fuel cell is developed. The activation polarizations, mass-transport limitations and resistances to charge transport in each component of the cell are explicitly incorporated. The anode kinetic mechanism is based on direct borohydride oxidation, borohydride hydrolysis and the full Tafel-Volmer-Heyrovsky mechanism for hydrogen evolution and oxidation. The mixed potential at the anode is calculated using the mixed-potential theory. The model results are compared to experimental data across a range of operating conditions and component properties, including the reactant concentrations, the anolyte flow rate, the ionomer volume fractions and the membrane/ionomer conductivity. A good qualitative fit to the experimental data is demonstrated. In order to gain insight into the anode reaction mechanism, the performance on both Pt and Ni anodes is simulated and compared to experimental observations. A detailed analysis of the results provides an explanation for the different performance on these catalysts.

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e-pub ahead of print date: 6 August 2012
Published date: 1 January 2013
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 348256
URI: http://eprints.soton.ac.uk/id/eprint/348256
ISSN: 0378-7753
PURE UUID: 512404d7-7aac-40f5-945b-3883351a840d
ORCID for C. Ponce de Leon: ORCID iD orcid.org/0000-0002-1907-5913
ORCID for R. G. Wills: ORCID iD orcid.org/0000-0002-4805-7589

Catalogue record

Date deposited: 11 Feb 2013 11:22
Last modified: 03 May 2020 00:28

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