Electrochemical analysis of separators used in single-chamber, air-cathode microbial fuel cells

Handle URI:
http://hdl.handle.net/10754/598132
Title:
Electrochemical analysis of separators used in single-chamber, air-cathode microbial fuel cells
Authors:
Wei, Bin; Tokash, Justin C.; Zhang, Fang; Kim, Younggy; Logan, Bruce E.
Abstract:
Polarization, solution-separator, charge transfer, and diffusion resistances of clean and used separator electrode assemblies were examined in microbial fuel cells using current-voltage curves and electrochemical impedance spectroscopy (EIS). Current-voltage curves showed the total resistance was reduced at low cathode potentials. EIS results revealed that at a set cathode potential of 0.3 V diffusion resistance was predominant, and it substantially increased when adding separators. However, at a lower cathode potential of 0.1 V all resistances showed only slight differences with and without separators. Used separator electrode assemblies with biofilms had increased charge transfer and diffusion resistances (0.1 V) when one separator was used; however, charge transfer resistance increased, and diffusion resistance did not appreciably change with four separators. Adding a plastic mesh to compress the separators improved maximum power densities. These results show the importance of pressing separators against the cathode, and the adverse impacts of biofilm formation on electrochemical performance. © 2012 Elsevier Ltd. All Rights Reserved.
Citation:
Wei B, Tokash JC, Zhang F, Kim Y, Logan BE (2013) Electrochemical analysis of separators used in single-chamber, air-cathode microbial fuel cells. Electrochimica Acta 89: 45–51. Available: http://dx.doi.org/10.1016/j.electacta.2012.11.004.
Publisher:
Elsevier BV
Journal:
Electrochimica Acta
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Feb-2013
DOI:
10.1016/j.electacta.2012.11.004
Type:
Article
ISSN:
0013-4686
Sponsors:
This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorWei, Binen
dc.contributor.authorTokash, Justin C.en
dc.contributor.authorZhang, Fangen
dc.contributor.authorKim, Younggyen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T13:13:16Zen
dc.date.available2016-02-25T13:13:16Zen
dc.date.issued2013-02en
dc.identifier.citationWei B, Tokash JC, Zhang F, Kim Y, Logan BE (2013) Electrochemical analysis of separators used in single-chamber, air-cathode microbial fuel cells. Electrochimica Acta 89: 45–51. Available: http://dx.doi.org/10.1016/j.electacta.2012.11.004.en
dc.identifier.issn0013-4686en
dc.identifier.doi10.1016/j.electacta.2012.11.004en
dc.identifier.urihttp://hdl.handle.net/10754/598132en
dc.description.abstractPolarization, solution-separator, charge transfer, and diffusion resistances of clean and used separator electrode assemblies were examined in microbial fuel cells using current-voltage curves and electrochemical impedance spectroscopy (EIS). Current-voltage curves showed the total resistance was reduced at low cathode potentials. EIS results revealed that at a set cathode potential of 0.3 V diffusion resistance was predominant, and it substantially increased when adding separators. However, at a lower cathode potential of 0.1 V all resistances showed only slight differences with and without separators. Used separator electrode assemblies with biofilms had increased charge transfer and diffusion resistances (0.1 V) when one separator was used; however, charge transfer resistance increased, and diffusion resistance did not appreciably change with four separators. Adding a plastic mesh to compress the separators improved maximum power densities. These results show the importance of pressing separators against the cathode, and the adverse impacts of biofilm formation on electrochemical performance. © 2012 Elsevier Ltd. All Rights Reserved.en
dc.description.sponsorshipThis research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectElectrochemical impedance spectroscopyen
dc.subjectElectrochemical resistancesen
dc.subjectMicrobial fuel cellen
dc.subjectSeparator electrode assemblyen
dc.titleElectrochemical analysis of separators used in single-chamber, air-cathode microbial fuel cellsen
dc.typeArticleen
dc.identifier.journalElectrochimica Actaen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
kaust.grant.numberKUS-I1-003-13en
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