On the origin and application of the Bruggeman Correlation for analysing transport phenomena in electrochemical systems
On the origin and application of the Bruggeman Correlation for analysing transport phenomena in electrochemical systems
The widely used Bruggeman equations correlate tortuosity factors of porous media with their porosity. Finding diverse application from optics to bubble formation, it received considerable attention in fuel cell and battery research, recently. The ability to estimate tortuous mass transport resistance based on porosity alone is attractive, because direct access to the tortuosity factors is notoriously difficult. The correlation, however, has limitations, which are not widely appreciated owing to the limited accessibility of the original manuscript. We retrace Bruggemans derivation, together with its initial assumptions, and comment on validity and limitations apparent from the original work to offer some guidance on its use.
tortuosity factor, tortuosity, diffusion, electrodes
44-51
Tjaden, Bernhard
323bac9b-f0fe-4745-8860-186763f68574
Cooper, Samuel J.
311fe859-38b4-4c26-951b-c53bb299e02c
Brett, Daniel J.L.
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Kramer, Denis
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Shearing, Paul R.
cceb19d5-0e2a-45f9-be1a-5b3cfa1df0ac
May 2016
Tjaden, Bernhard
323bac9b-f0fe-4745-8860-186763f68574
Cooper, Samuel J.
311fe859-38b4-4c26-951b-c53bb299e02c
Brett, Daniel J.L.
444b3f29-a8b8-4793-84b1-c22fbe61e999
Kramer, Denis
1faae37a-fab7-4edd-99ee-ae4c30d3cde4
Shearing, Paul R.
cceb19d5-0e2a-45f9-be1a-5b3cfa1df0ac
Tjaden, Bernhard, Cooper, Samuel J., Brett, Daniel J.L., Kramer, Denis and Shearing, Paul R.
(2016)
On the origin and application of the Bruggeman Correlation for analysing transport phenomena in electrochemical systems.
Current Opinion in Chemical Engineering, 12, .
(doi:10.1016/j.coche.2016.02.006).
Abstract
The widely used Bruggeman equations correlate tortuosity factors of porous media with their porosity. Finding diverse application from optics to bubble formation, it received considerable attention in fuel cell and battery research, recently. The ability to estimate tortuous mass transport resistance based on porosity alone is attractive, because direct access to the tortuosity factors is notoriously difficult. The correlation, however, has limitations, which are not widely appreciated owing to the limited accessibility of the original manuscript. We retrace Bruggemans derivation, together with its initial assumptions, and comment on validity and limitations apparent from the original work to offer some guidance on its use.
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Accepted/In Press date: 15 February 2016
e-pub ahead of print date: 12 March 2016
Published date: May 2016
Keywords:
tortuosity factor, tortuosity, diffusion, electrodes
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 388395
URI: http://eprints.soton.ac.uk/id/eprint/388395
ISSN: 2211-3398
PURE UUID: b81b17c0-1e49-4995-af5b-efdab11e9bfa
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Date deposited: 25 Feb 2016 08:58
Last modified: 14 Mar 2024 22:56
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Contributors
Author:
Bernhard Tjaden
Author:
Samuel J. Cooper
Author:
Daniel J.L. Brett
Author:
Paul R. Shearing
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