Controlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentials

Handle URI:
http://hdl.handle.net/10754/597870
Title:
Controlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentials
Authors:
Zhu, Xiuping; Tokash, Justin C.; Hong, Yiying; Logan, Bruce E.
Abstract:
Power density curves for microbial fuel cells (MFCs) often show power overshoot, resulting in inaccurate estimation of MFC performance at high current densities. The reasons for power overshoot are not well understood, but biofilm acclimation and development are known factors. In order to better explore the reasons for power overshoot, exoelectrogenic biofilms were developed at four different anode potentials (-0.46 V, -0.24 V, 0 V, and 0.50 V vs. Ag/AgCl), and then the properties of the biofilms were examined using polarization tests and cyclic voltammetry (CV). The maximum power density of the MFCs was 1200±100 mW/m2. Power overshoot was observed in MFCs incubated at -0.46 V, but not those acclimated atmore positive potentials, indicating that bacterial activitywas significantly influenced by the anode acclimation potential. CV results further indicated that power overshoot of MFCs incubated at the lowest anode potential was associatedwith a decreasing electroactivity of the anodic biofilm in the high potential region,which resulted from a lack of sufficient electron transfer components to shuttle electrons at rates needed for these more positive potentials. © 2012 Elsevier B.V.
Citation:
Zhu X, Tokash JC, Hong Y, Logan BE (2013) Controlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentials. Bioelectrochemistry 90: 30–35. Available: http://dx.doi.org/10.1016/j.bioelechem.2012.10.004.
Publisher:
Elsevier BV
Journal:
Bioelectrochemistry
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Apr-2013
DOI:
10.1016/j.bioelechem.2012.10.004
PubMed ID:
23178374
Type:
Article
ISSN:
1567-5394
Sponsors:
This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). We also thank Dr. Ivan Ivanov for his helpful discussions.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhu, Xiupingen
dc.contributor.authorTokash, Justin C.en
dc.contributor.authorHong, Yiyingen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T12:58:07Zen
dc.date.available2016-02-25T12:58:07Zen
dc.date.issued2013-04en
dc.identifier.citationZhu X, Tokash JC, Hong Y, Logan BE (2013) Controlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentials. Bioelectrochemistry 90: 30–35. Available: http://dx.doi.org/10.1016/j.bioelechem.2012.10.004.en
dc.identifier.issn1567-5394en
dc.identifier.pmid23178374en
dc.identifier.doi10.1016/j.bioelechem.2012.10.004en
dc.identifier.urihttp://hdl.handle.net/10754/597870en
dc.description.abstractPower density curves for microbial fuel cells (MFCs) often show power overshoot, resulting in inaccurate estimation of MFC performance at high current densities. The reasons for power overshoot are not well understood, but biofilm acclimation and development are known factors. In order to better explore the reasons for power overshoot, exoelectrogenic biofilms were developed at four different anode potentials (-0.46 V, -0.24 V, 0 V, and 0.50 V vs. Ag/AgCl), and then the properties of the biofilms were examined using polarization tests and cyclic voltammetry (CV). The maximum power density of the MFCs was 1200±100 mW/m2. Power overshoot was observed in MFCs incubated at -0.46 V, but not those acclimated atmore positive potentials, indicating that bacterial activitywas significantly influenced by the anode acclimation potential. CV results further indicated that power overshoot of MFCs incubated at the lowest anode potential was associatedwith a decreasing electroactivity of the anodic biofilm in the high potential region,which resulted from a lack of sufficient electron transfer components to shuttle electrons at rates needed for these more positive potentials. © 2012 Elsevier B.V.en
dc.description.sponsorshipThis research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). We also thank Dr. Ivan Ivanov for his helpful discussions.en
dc.publisherElsevier BVen
dc.subjectAnode potentialen
dc.subjectMicrobial fuel cellen
dc.subjectPolarizationen
dc.subjectPower overshooten
dc.titleControlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentialsen
dc.typeArticleen
dc.identifier.journalBioelectrochemistryen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
kaust.grant.numberKUS-I1-003-13en

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