Pablo Ledezma
Dynamic polarisation reveals differential steady-state stabilisation and capacitive-like behaviour in microbial fuel cells
Ledezma, Pablo; Degrenne, Nicolas; Bevilacqua, Pascal; Buret, Fran�ois; Allard, Bruno; Greenman, John; Ieropoulos, Ioannis
Authors
Nicolas Degrenne
Pascal Bevilacqua
Fran�ois Buret
Bruno Allard
John Greenman john.greenman@uwe.ac.uk
Yannis Ieropoulos Ioannis2.Ieropoulos@uwe.ac.uk
Professor in Bioenergy & Director of B-B
Abstract
In this paper we present several preliminary results produced with a purposely-designed external-resistor (R ext ) sweeping tool for microbial fuel cells (MFCs). Fast sampling rates show that MFCs exhibit differential steady-state stabilisation behaviours depending on R ext , with consequences for time constant (t c ) selection. At high R ext (35kΩ), it is demonstrated that a t c ≥10 min avoids underestimation not overestimation, whilst at low R ext (100Ω) 5min are sufficient, suggesting that sweeps with variable t c are possible. However, within the maximum power transfer range (2.5kΩ), steady-states are only observed at 20min t c but with a smaller confidence interval, questioning whether the polarisation technique is suitable to estimate maximum power transfer. Finally, a strategy towards the exploitation of a capacitive-like behaviour in MFCs is proposed, tapping into ≥10min periods with up to 50% higher current and energy transfer that could prove important for MFC-powered applications. © 2013 Elsevier Ltd.
Citation
Ledezma, P., Degrenne, N., Bevilacqua, P., Buret, F., Allard, B., Greenman, J., & Ieropoulos, I. (2014). Dynamic polarisation reveals differential steady-state stabilisation and capacitive-like behaviour in microbial fuel cells. Sustainable Energy Technologies and Assessments, 5, 1-6. https://doi.org/10.1016/j.seta.2013.10.008
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 25, 2013 |
Online Publication Date | Dec 1, 2013 |
Publication Date | Jan 1, 2014 |
Journal | Sustainable Energy Technologies and Assessments |
Print ISSN | 2213-1388 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 5 |
Pages | 1-6 |
DOI | https://doi.org/10.1016/j.seta.2013.10.008 |
Keywords | microbial fuel cells, external resistors, polarisation curve, time constant, steady-states |
Public URL | https://uwe-repository.worktribe.com/output/825335 |
Publisher URL | http://dx.doi.org/10.1016/j.seta.2013.10.008 |
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