Membranes and MEAs Based on Sulfonated Poly(ether ketone ketone) and Heteropolyacids for Polymer Electrolyte Fuel Cells.
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| Title: | Membranes and MEAs Based on Sulfonated Poly(ether ketone ketone) and Heteropolyacids for Polymer Electrolyte Fuel Cells. |
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| Authors: | Ramani, Vijay1,2 ramani@iit.edu, Swier, Steven3,4, Shaw, M. T.1,3, Weiss, R. A.1,3, Kunz, H. R.1, Fenton, J. M.1,5 |
| Source: | Journal of The Electrochemical Society. 2008, Vol. 155 Issue 6, pB532-B537. 6p. 6 Black and White Photographs, 10 Graphs. |
| Subjects: | Ketones, Fuel cells, Electrolytes, Polymers, Electrochemistry, Electrodes |
| Abstract: | Organic sulfonated poly(ether ketone ketone) (SPEKK) membranes with different ion-exchange capacities (IECs), and composite membranes prepared by the addition of 20 wt % phosphotungstic acid (PTA) to SPEKK were used to prepare membrane electrode assemblies (MEAs). The proton conductivity of the membranes increased with increasing IEC of the SPEKK, and with the addition of PTA. The proton conductivity attained at 80°C and 75% relative humidity was 20 ± 2 mS/cm. The feasibility of using SPEKK in the cathode layer of the MEAs was investigated.. The electrochemically active surface areas (ECAs) of the SPEKK-based cathodes were lower than that of the Nation-based cathode and decreased further as the operating relative humidity was lowered. These observations were reflected in the single-cell polarization data, which indicated that the MEAs with the SPEKK-based electrodes were outperformed by their Nation-based counterparts. Furthermore, a mismatch in SPEKK IEC between the membrane and cathode resulted in immiscibility at the interface. While the additive stability in the composite membrane was very good, the long-term stability of the membranes was poor when compared to perfluorosulfonic acid membranes such as Nation, with failure occurring by scission along the gasket edges of the MEA after limited operation. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 32597311 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Membranes and MEAs Based on Sulfonated Poly(ether ketone ketone) and Heteropolyacids for Polymer Electrolyte Fuel Cells. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ramani%2C+Vijay%22">Ramani, Vijay</searchLink><relatesTo>1,2</relatesTo><i> ramani@iit.edu</i><br /><searchLink fieldCode="AR" term="%22Swier%2C+Steven%22">Swier, Steven</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Shaw%2C+M%2E+T%2E%22">Shaw, M. T.</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Weiss%2C+R%2E+A%2E%22">Weiss, R. A.</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Kunz%2C+H%2E+R%2E%22">Kunz, H. R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fenton%2C+J%2E+M%2E%22">Fenton, J. M.</searchLink><relatesTo>1,5</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. 2008, Vol. 155 Issue 6, pB532-B537. 6p. 6 Black and White Photographs, 10 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Ketones%22">Ketones</searchLink><br /><searchLink fieldCode="DE" term="%22Fuel+cells%22">Fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolytes%22">Electrolytes</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Electrodes%22">Electrodes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Organic sulfonated poly(ether ketone ketone) (SPEKK) membranes with different ion-exchange capacities (IECs), and composite membranes prepared by the addition of 20 wt % phosphotungstic acid (PTA) to SPEKK were used to prepare membrane electrode assemblies (MEAs). The proton conductivity of the membranes increased with increasing IEC of the SPEKK, and with the addition of PTA. The proton conductivity attained at 80°C and 75% relative humidity was 20 ± 2 mS/cm. The feasibility of using SPEKK in the cathode layer of the MEAs was investigated.. The electrochemically active surface areas (ECAs) of the SPEKK-based cathodes were lower than that of the Nation-based cathode and decreased further as the operating relative humidity was lowered. These observations were reflected in the single-cell polarization data, which indicated that the MEAs with the SPEKK-based electrodes were outperformed by their Nation-based counterparts. Furthermore, a mismatch in SPEKK IEC between the membrane and cathode resulted in immiscibility at the interface. While the additive stability in the composite membrane was very good, the long-term stability of the membranes was poor when compared to perfluorosulfonic acid membranes such as Nation, with failure occurring by scission along the gasket edges of the MEA after limited operation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1149/1.2898171 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: B532 Subjects: – SubjectFull: Ketones Type: general – SubjectFull: Fuel cells Type: general – SubjectFull: Electrolytes Type: general – SubjectFull: Polymers Type: general – SubjectFull: Electrochemistry Type: general – SubjectFull: Electrodes Type: general Titles: – TitleFull: Membranes and MEAs Based on Sulfonated Poly(ether ketone ketone) and Heteropolyacids for Polymer Electrolyte Fuel Cells. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ramani, Vijay – PersonEntity: Name: NameFull: Swier, Steven – PersonEntity: Name: NameFull: Shaw, M. T. – PersonEntity: Name: NameFull: Weiss, R. A. – PersonEntity: Name: NameFull: Kunz, H. R. – PersonEntity: Name: NameFull: Fenton, J. M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: 2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 00134651 Numbering: – Type: volume Value: 155 – Type: issue Value: 6 Titles: – TitleFull: Journal of The Electrochemical Society Type: main |
| ResultId | 1 |
