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Development of a two-dimensional, moving mesh treatment for modelling the reaction chamber of the soluble lead flow battery as a function of state of charge for Pb and PbO2 deposition and dissolution

Development of a two-dimensional, moving mesh treatment for modelling the reaction chamber of the soluble lead flow battery as a function of state of charge for Pb and PbO2 deposition and dissolution
Development of a two-dimensional, moving mesh treatment for modelling the reaction chamber of the soluble lead flow battery as a function of state of charge for Pb and PbO2 deposition and dissolution

During cycling of the soluble lead flow battery, solid layers of lead (Pb) and lead dioxide (PbO 2) are deposited and stripped from the electrode surfaces. As such, there is a change in geometry of the flow field within the battery. A detailed two-dimensional numerical model which simulates this change in geometry using a moving mesh technique is developed. The model accounts for deposition of Pb, PbO 2 along with the formation of lead oxide (PbO) during discharge of the PbO 2 deposit due to a side reaction which is commonly assumed in the literature. Over short time scales of around 1 hr charge/discharge periods, which are typically reported in the literature, the effect of this is small. However, over more realistic time scales (>1 hr), by applying this technique, significant differences are seen in the cell resistance and in the mass flow rate of electrolyte. As a result, a difference in cell voltage of up to 65 mV is seen over a 24 h period. The numerical results are validated against experimental data, showing an agreement in the voltage-time profile and a close fit for the moving mesh approach.

Cell resistance, Energy storage,, Modelling & simulation, Moving mesh, Soluble lead flow battery
2352-152X
1-27
Fraser, Ewan
5ec334a1-8ab3-4028-8d67-57a19024ad00
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Fraser, Ewan
5ec334a1-8ab3-4028-8d67-57a19024ad00
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c

Fraser, Ewan, Ranga Dinesh, K.K.J and Wills, Richard (2020) Development of a two-dimensional, moving mesh treatment for modelling the reaction chamber of the soluble lead flow battery as a function of state of charge for Pb and PbO2 deposition and dissolution. Journal of Energy Storage, 31, 1-27, [101484]. (doi:10.1016/j.est.2020.101484).

Record type: Article

Abstract

During cycling of the soluble lead flow battery, solid layers of lead (Pb) and lead dioxide (PbO 2) are deposited and stripped from the electrode surfaces. As such, there is a change in geometry of the flow field within the battery. A detailed two-dimensional numerical model which simulates this change in geometry using a moving mesh technique is developed. The model accounts for deposition of Pb, PbO 2 along with the formation of lead oxide (PbO) during discharge of the PbO 2 deposit due to a side reaction which is commonly assumed in the literature. Over short time scales of around 1 hr charge/discharge periods, which are typically reported in the literature, the effect of this is small. However, over more realistic time scales (>1 hr), by applying this technique, significant differences are seen in the cell resistance and in the mass flow rate of electrolyte. As a result, a difference in cell voltage of up to 65 mV is seen over a 24 h period. The numerical results are validated against experimental data, showing an agreement in the voltage-time profile and a close fit for the moving mesh approach.

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Manuscript EST 2020 175 R1 - Accepted Manuscript
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More information

Accepted/In Press date: 23 April 2020
e-pub ahead of print date: 24 June 2020
Published date: October 2020
Additional Information: Funding Information: The authors would like to acknowledge the financial support received from the Engineering and Physical Sciences Research Council ( EPSRC ) through the Centre for Doctoral Training in Energy Storage and its Applications grant EP/L016818/1 . Publisher Copyright: © 2020 Elsevier Ltd
Keywords: Cell resistance, Energy storage,, Modelling & simulation, Moving mesh, Soluble lead flow battery

Identifiers

Local EPrints ID: 441844
URI: http://eprints.soton.ac.uk/id/eprint/441844
ISSN: 2352-152X
PURE UUID: 3c84b055-7c86-4e1c-b0bc-fad5d16bbcb7
ORCID for Ewan Fraser: ORCID iD orcid.org/0000-0001-9592-9071
ORCID for K.K.J Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834
ORCID for Richard Wills: ORCID iD orcid.org/0000-0002-4805-7589

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Date deposited: 30 Jun 2020 16:30
Last modified: 12 Jul 2024 04:03

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