A novel flow battery: a lead acid battery based on an electrolyte
with soluble lead(II): Part VII. Further studies of the lead dioxide positive electrode
A novel flow battery: a lead acid battery based on an electrolyte
with soluble lead(II): Part VII. Further studies of the lead dioxide positive electrode
Extensive cycling of the soluble lead flow battery has revealed unexpected problems with the reduction
of lead dioxide at the positive electrode during discharge. This has led to a more detailed study of the
PbO2/Pb2+ couple in methanesulfonic acid. The variation of the phase composition (XRD) and deposit
structure (SEM) have been defined as a function of current density, Pb2+ andH+ concentrations, deposition
charge and temperature aswell as the consequences of charge cycling. Pure-PbO2, pure-PbO2 and their
mixtures can be deposited from methanesulfonic acid media. The -phase deposits as a more compact,
smoother layer, which iswell suited to charge cycling. While the anodic deposition of thick layers of PbO2
is straightforward, their reduction is not; the complexities are explained by an increase in pH within the
pores of the deposit. The results suggest that operating the battery at lead(II) concentrations <0.3M and
elevated temperatures should be avoided.
flow battery, lead acid, lead dioxide deposition, methanesulfonic acid, phase composition
4688-4695
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
29 March 2009
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Li, Xiaohong, Pletcher, Derek and Walsh, Frank C.
(2009)
A novel flow battery: a lead acid battery based on an electrolyte
with soluble lead(II): Part VII. Further studies of the lead dioxide positive electrode.
Electrochimica Acta, 54 (20), .
(doi:10.1016/j.electacta.2009.03.075).
Abstract
Extensive cycling of the soluble lead flow battery has revealed unexpected problems with the reduction
of lead dioxide at the positive electrode during discharge. This has led to a more detailed study of the
PbO2/Pb2+ couple in methanesulfonic acid. The variation of the phase composition (XRD) and deposit
structure (SEM) have been defined as a function of current density, Pb2+ andH+ concentrations, deposition
charge and temperature aswell as the consequences of charge cycling. Pure-PbO2, pure-PbO2 and their
mixtures can be deposited from methanesulfonic acid media. The -phase deposits as a more compact,
smoother layer, which iswell suited to charge cycling. While the anodic deposition of thick layers of PbO2
is straightforward, their reduction is not; the complexities are explained by an increase in pH within the
pores of the deposit. The results suggest that operating the battery at lead(II) concentrations <0.3M and
elevated temperatures should be avoided.
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Submitted date: 24 February 2009
Published date: 29 March 2009
Keywords:
flow battery, lead acid, lead dioxide deposition, methanesulfonic acid, phase composition
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 66547
URI: http://eprints.soton.ac.uk/id/eprint/66547
ISSN: 0013-4686
PURE UUID: 5f30e04e-f144-4c24-8a94-dca9e46d7ea2
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Date deposited: 29 Jun 2009
Last modified: 13 Mar 2024 18:24
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Author:
Xiaohong Li
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