Pressurized air cathodes for enhanced stability and power generation by microbial fuel cells

Handle URI:
http://hdl.handle.net/10754/624963
Title:
Pressurized air cathodes for enhanced stability and power generation by microbial fuel cells
Authors:
He, Weihua ( 0000-0002-8567-050X ) ; Yang, Wulin; Tian, Yushi; Zhu, Xiuping; Liu, Jia; Feng, Yujie; Logan, Bruce E. ( 0000-0001-7478-8070 )
Abstract:
Large differences between the water and air pressure in microbial fuel cells (MFCs) can deform and damage cathodes. To avoid deformation, the cathode air pressure was controlled to balance pressure differences between the air and water. Raising the air pressures from 0 to 10 kPa at a set cathode potential of −0.3 V (versus Ag/AgCl) enhanced cathode performance by 17%, but pressures ≥25 kPa decreased current and resulted in air leakage into the solution. Matching the air pressure with the water pressure avoided cathode deformation and improved performance. The maximum power density increased by 15%, from 1070 ± 20 to 1230 ± 70 mW m, with balanced air and water pressures of 10–25 kPa. Oxygen partial pressures ≥12.5 kPa in the cathode compartment maintained the oxygen reduction rate to be within 92 ± 1% of that in ambient air. The use of pressurized air flow through the cathode compartments can enable closer spacing of the cathodes compared to passive gas transfer systems, which could make the reactor design more compact. The energy cost of pressurizing the cathodes was estimated to be smaller than the increase in power that resulted from the use of pressurized cathodes.
Citation:
He W, Yang W, Tian Y, Zhu X, Liu J, et al. (2016) Pressurized air cathodes for enhanced stability and power generation by microbial fuel cells. Journal of Power Sources 332: 447–453. Available: http://dx.doi.org/10.1016/j.jpowsour.2016.09.112.
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
30-Sep-2016
DOI:
10.1016/j.jpowsour.2016.09.112
Type:
Article
ISSN:
0378-7753
Sponsors:
The authors thank Dr. Xiaoyuan Zhang and David Jones for help with the manufacture of the reactor and analytical measurements. This research was supported by the Strategic Environmental Research and Development Program (SERDP), Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST), the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Grant No. 2013DX08), the National Natural Science Fund for Distinguished Young Scholars (Grant No. 51125033), and the International Cooperating Project between China and European Union (Grant No. 2014DFE90110) and a scholarship (No. 201206120191) to W.H. from the China Scholarship Council (CSC).
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Full metadata record

DC FieldValue Language
dc.contributor.authorHe, Weihuaen
dc.contributor.authorYang, Wulinen
dc.contributor.authorTian, Yushien
dc.contributor.authorZhu, Xiupingen
dc.contributor.authorLiu, Jiaen
dc.contributor.authorFeng, Yujieen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2017-06-12T13:52:08Z-
dc.date.available2017-06-12T13:52:08Z-
dc.date.issued2016-09-30en
dc.identifier.citationHe W, Yang W, Tian Y, Zhu X, Liu J, et al. (2016) Pressurized air cathodes for enhanced stability and power generation by microbial fuel cells. Journal of Power Sources 332: 447–453. Available: http://dx.doi.org/10.1016/j.jpowsour.2016.09.112.en
dc.identifier.issn0378-7753en
dc.identifier.doi10.1016/j.jpowsour.2016.09.112en
dc.identifier.urihttp://hdl.handle.net/10754/624963-
dc.description.abstractLarge differences between the water and air pressure in microbial fuel cells (MFCs) can deform and damage cathodes. To avoid deformation, the cathode air pressure was controlled to balance pressure differences between the air and water. Raising the air pressures from 0 to 10 kPa at a set cathode potential of −0.3 V (versus Ag/AgCl) enhanced cathode performance by 17%, but pressures ≥25 kPa decreased current and resulted in air leakage into the solution. Matching the air pressure with the water pressure avoided cathode deformation and improved performance. The maximum power density increased by 15%, from 1070 ± 20 to 1230 ± 70 mW m, with balanced air and water pressures of 10–25 kPa. Oxygen partial pressures ≥12.5 kPa in the cathode compartment maintained the oxygen reduction rate to be within 92 ± 1% of that in ambient air. The use of pressurized air flow through the cathode compartments can enable closer spacing of the cathodes compared to passive gas transfer systems, which could make the reactor design more compact. The energy cost of pressurizing the cathodes was estimated to be smaller than the increase in power that resulted from the use of pressurized cathodes.en
dc.description.sponsorshipThe authors thank Dr. Xiaoyuan Zhang and David Jones for help with the manufacture of the reactor and analytical measurements. This research was supported by the Strategic Environmental Research and Development Program (SERDP), Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST), the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Grant No. 2013DX08), the National Natural Science Fund for Distinguished Young Scholars (Grant No. 51125033), and the International Cooperating Project between China and European Union (Grant No. 2014DFE90110) and a scholarship (No. 201206120191) to W.H. from the China Scholarship Council (CSC).en
dc.publisherElsevier BVen
dc.subjectElectrode spaceren
dc.subjectGas pressureen
dc.subjectHydraulic pressureen
dc.subjectMicrobial fuel cellen
dc.subjectOxygen partial pressureen
dc.titlePressurized air cathodes for enhanced stability and power generation by microbial fuel cellsen
dc.typeArticleen
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin, 150090, Chinaen
dc.contributor.institutionDepartment of Civil & Environmental Engineering, Penn State University, 231Q Sackett Building, University Park, PA, 16802, United Statesen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA, 70803, United Statesen
kaust.grant.numberKUS-I1-003-13en
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