Measurement of key electrolyte properties for improved performance of the soluble lead flow battery
Measurement of key electrolyte properties for improved performance of the soluble lead flow battery
The soluble lead flow battery utilises the Pb/Pb2+ and Pb2+/Pb4+ redox couples. The electrolyte is methanesulfonic acid, in which Pb2+ species are soluble, up to 2.6 mol dm−3. Previous publications have presented data demonstrating differing performances for the electrode and cell reactions. In this paper, electrolyte properties including density, viscosity, ionic conductivity and species concentration are systematically investigated to identify their impact on the efficiency and cycle life of a soluble lead cell under static conditions. The relationship between ionic conductivity and species concentration (Pb2+ and methanesulfonic acid) in the starting electrolyte is shown to be key to cell performance. An electrolyte initially containing 0.7 mol dm−3 Pb(CH3SO3)2 & 1.0 mol dm−3 CH3SO3H is shown to provide optimal electrochemical performance for the soluble lead cell, achieving charge and voltage efficiencies of greater than 80% and 70% respectively along with Pb2+ utilisation of over 80%.
soluble lead, methanesulfonic acid, flow battery
18491-18498
Krishna, Muthu
e399da21-ee25-4c11-9f29-6e11bb1f71c5
Wallis, Lauren
6f0cd4d6-c32d-4d7f-8c83-b439e3f4c506
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Hall, Dale
d40e8edc-06cc-4215-80bc-0a2dfaaa14a8
Shah, A. A.
5c43ac37-c4a7-4256-88ef-8c427886b924
20 July 2017
Krishna, Muthu
e399da21-ee25-4c11-9f29-6e11bb1f71c5
Wallis, Lauren
6f0cd4d6-c32d-4d7f-8c83-b439e3f4c506
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Hall, Dale
d40e8edc-06cc-4215-80bc-0a2dfaaa14a8
Shah, A. A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Krishna, Muthu, Wallis, Lauren, Wills, Richard, Hall, Dale and Shah, A. A.
(2017)
Measurement of key electrolyte properties for improved performance of the soluble lead flow battery.
International Journal of Hydrogen Energy, 42 (29), .
(doi:10.1016/j.ijhydene.2017.05.004).
Abstract
The soluble lead flow battery utilises the Pb/Pb2+ and Pb2+/Pb4+ redox couples. The electrolyte is methanesulfonic acid, in which Pb2+ species are soluble, up to 2.6 mol dm−3. Previous publications have presented data demonstrating differing performances for the electrode and cell reactions. In this paper, electrolyte properties including density, viscosity, ionic conductivity and species concentration are systematically investigated to identify their impact on the efficiency and cycle life of a soluble lead cell under static conditions. The relationship between ionic conductivity and species concentration (Pb2+ and methanesulfonic acid) in the starting electrolyte is shown to be key to cell performance. An electrolyte initially containing 0.7 mol dm−3 Pb(CH3SO3)2 & 1.0 mol dm−3 CH3SO3H is shown to provide optimal electrochemical performance for the soluble lead cell, achieving charge and voltage efficiencies of greater than 80% and 70% respectively along with Pb2+ utilisation of over 80%.
Text
Measuring key electrolyte factors
- Accepted Manuscript
More information
Accepted/In Press date: 2 May 2017
e-pub ahead of print date: 20 May 2017
Published date: 20 July 2017
Keywords:
soluble lead, methanesulfonic acid, flow battery
Identifiers
Local EPrints ID: 413393
URI: http://eprints.soton.ac.uk/id/eprint/413393
ISSN: 0360-3199
PURE UUID: 1235f3c3-52e1-46f3-a189-7b16726ca281
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Date deposited: 23 Aug 2017 16:31
Last modified: 16 Mar 2024 03:34
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Contributors
Author:
Muthu Krishna
Author:
Lauren Wallis
Author:
Dale Hall
Author:
A. A. Shah
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