Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes

Handle URI:
http://hdl.handle.net/10754/599008
Title:
Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes
Authors:
Zhang, Fang; Chen, Guang; Hickner, Michael A.; Logan, Bruce E.
Abstract:
Poly(dimethylsiloxane) (PDMS) was investigated as an alternative to Nafion as an air cathode catalyst binder in microbial fuel cells (MFCs). Cathodes were constructed around either stainless steel (SS) mesh or copper mesh using PDMS as both catalyst binder and diffusion layer, and compared to cathodes of the same structure having a Nafion binder. With PDMS binder, copper mesh cathodes produced a maximum power of 1710 ± 1 mW m -2, while SS mesh had a slightly lower power of 1680 ± 12 mW m -2, with both values comparable to those obtained with Nafion binder. Cathodes with PDMS binder had stable power production of 1510 ± 22 mW m -2 (copper) and 1480 ± 56 mW m -2 (SS) over 15 days at cycle 15, compared to a 40% decrease in power with the Nafion binder. Cathodes with the PDMS binder had lower total cathode impedance than those with Nafion. This is due to a large decrease in diffusion resistance, because hydrophobic PDMS effectively prevented catalyst sites from filling up with water, improving oxygen mass transfer. The cost of PDMS is only 0.23% of that of Nafion. These results showed that PDMS is a very effective and low-cost alternative to Nafion binder that will be useful for large scale construction of these cathodes for MFC applications. © 2012 Elsevier B.V.
Citation:
Zhang F, Chen G, Hickner MA, Logan BE (2012) Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes. Journal of Power Sources 218: 100–105. Available: http://dx.doi.org/10.1016/j.jpowsour.2012.06.088.
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Nov-2012
DOI:
10.1016/j.jpowsour.2012.06.088
Type:
Article
ISSN:
0378-7753
Sponsors:
The authors thank D.W. Jones for help with the analytical measurements. 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.authorZhang, Fangen
dc.contributor.authorChen, Guangen
dc.contributor.authorHickner, Michael A.en
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T13:51:05Zen
dc.date.available2016-02-25T13:51:05Zen
dc.date.issued2012-11en
dc.identifier.citationZhang F, Chen G, Hickner MA, Logan BE (2012) Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes. Journal of Power Sources 218: 100–105. Available: http://dx.doi.org/10.1016/j.jpowsour.2012.06.088.en
dc.identifier.issn0378-7753en
dc.identifier.doi10.1016/j.jpowsour.2012.06.088en
dc.identifier.urihttp://hdl.handle.net/10754/599008en
dc.description.abstractPoly(dimethylsiloxane) (PDMS) was investigated as an alternative to Nafion as an air cathode catalyst binder in microbial fuel cells (MFCs). Cathodes were constructed around either stainless steel (SS) mesh or copper mesh using PDMS as both catalyst binder and diffusion layer, and compared to cathodes of the same structure having a Nafion binder. With PDMS binder, copper mesh cathodes produced a maximum power of 1710 ± 1 mW m -2, while SS mesh had a slightly lower power of 1680 ± 12 mW m -2, with both values comparable to those obtained with Nafion binder. Cathodes with PDMS binder had stable power production of 1510 ± 22 mW m -2 (copper) and 1480 ± 56 mW m -2 (SS) over 15 days at cycle 15, compared to a 40% decrease in power with the Nafion binder. Cathodes with the PDMS binder had lower total cathode impedance than those with Nafion. This is due to a large decrease in diffusion resistance, because hydrophobic PDMS effectively prevented catalyst sites from filling up with water, improving oxygen mass transfer. The cost of PDMS is only 0.23% of that of Nafion. These results showed that PDMS is a very effective and low-cost alternative to Nafion binder that will be useful for large scale construction of these cathodes for MFC applications. © 2012 Elsevier B.V.en
dc.description.sponsorshipThe authors thank D.W. Jones for help with the analytical measurements. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectAnti-floodingen
dc.subjectCatalyst binderen
dc.subjectMicrobial fuel cellen
dc.subjectPoly(dimethylsiloxane)en
dc.titleNovel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodesen
dc.typeArticleen
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
kaust.grant.numberKUS-I1-003-13en
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