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

dc.contributor.authorZhu, Xiuping
dc.contributor.authorTokash, Justin C.
dc.contributor.authorHong, Yiying
dc.contributor.authorLogan, Bruce E.
dc.contributor.institutionPennsylvania State University, State College, United States
dc.date.accessioned2016-02-25T12:58:07Z
dc.date.available2016-02-25T12:58:07Z
dc.date.issued2013-04
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.
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.
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.
dc.identifier.doi10.1016/j.bioelechem.2012.10.004
dc.identifier.issn1567-5394
dc.identifier.journalBioelectrochemistry
dc.identifier.pmid23178374
dc.identifier.urihttp://hdl.handle.net/10754/597870
dc.publisherElsevier BV
dc.subjectAnode potential
dc.subjectMicrobial fuel cell
dc.subjectPolarization
dc.subjectPower overshoot
dc.titleControlling the occurrence of power overshoot by adapting microbial fuel cells to high anode potentials
dc.typeArticle
display.details.left<span><h5>Type</h5>Article<br><br><h5>Authors</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Zhu, Xiuping,equals">Zhu, Xiuping</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Tokash, Justin C.,equals">Tokash, Justin C.</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Hong, Yiying,equals">Hong, Yiying</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Logan, Bruce E.,equals">Logan, Bruce E.</a><br><br><h5>KAUST Grant Number</h5>KUS-I1-003-13<br><br><h5>Date</h5>2013-04</span>
display.details.right<span><h5>Abstract</h5>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.<br><br><h5>Citation</h5>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.<br><br><h5>Acknowledgements</h5>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.<br><br><h5>Publisher</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.publisher=Elsevier BV,equals">Elsevier BV</a><br><br><h5>Journal</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.journal=Bioelectrochemistry,equals">Bioelectrochemistry</a><br><br><h5>DOI</h5><a href="https://doi.org/10.1016/j.bioelechem.2012.10.004">10.1016/j.bioelechem.2012.10.004</a><br><br><h5>PubMed ID</h5><a href="https://www.ncbi.nlm.nih.gov/pubmed/23178374">23178374</a></span>
kaust.grant.numberKUS-I1-003-13
orcid.authorZhu, Xiuping
orcid.authorTokash, Justin C.
orcid.authorHong, Yiying
orcid.authorLogan, Bruce E.
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