Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs
Acid-doped poly(2,2′-m-phenylene-5,5′-bibenzimidazole) membranes have been prepared and used to assemble membrane electrode assemblies (MEAs) with various contents of PBI (1–30 wt.%) in the gas diffusion electrode (GDE). The MEAs were tested in the temperature range of 140∘C–200∘C showing that the P...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-01-01
|
| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.4061/2011/261065 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832562543262957568 |
|---|---|
| author | Javier Parrondo Chitturi Venkateswara Rao Sundara L. Ghatty B. Rambabu |
| author_facet | Javier Parrondo Chitturi Venkateswara Rao Sundara L. Ghatty B. Rambabu |
| author_sort | Javier Parrondo |
| collection | DOAJ |
| description | Acid-doped poly(2,2′-m-phenylene-5,5′-bibenzimidazole) membranes have been prepared and used to assemble membrane electrode assemblies (MEAs) with various contents of PBI (1–30 wt.%) in the gas diffusion electrode (GDE). The MEAs were tested in the temperature range of 140∘C–200∘C showing that the PBI content in the electrocatalyst layer influences strongly the electrochemical performance of the fuel cell. The MEAs were assembled using polyphosphoric acid doped PBI membranes having conductivities of 0.1 S cm−1 at 180∘C. The ionic resistance of the cathode decreased from 0.29 to 0.14 Ohm-cm2 (180∘C) when the content of PBI is varied from 1 to 10 wt.%. Similarly, the mass transfer resistance or Warburg impedance increased 2.5 times, reaching values of 6 Ohm-cm2. 5 wt.% PBI-based MEA showed the best performance. The electrochemical impedance measurements were in good agreement with the fuel cell polarization curves obtained, and the optimum performance was obtained when overall resistance was minimal. |
| format | Article |
| id | doaj-art-8d230a6ff16647dc8ca83ee6914c9881 |
| institution | Kabale University |
| issn | 2090-3537 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-8d230a6ff16647dc8ca83ee6914c98812025-02-03T01:22:19ZengWileyInternational Journal of Electrochemistry2090-35372011-01-01201110.4061/2011/261065261065Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCsJavier Parrondo0Chitturi Venkateswara Rao1Sundara L. Ghatty2B. Rambabu3Solid State Ionics and Surface Science Laboratory, Department of Physics, Southern University and A&M College, Baton Rouge, LA 70813, USASolid State Ionics and Surface Science Laboratory, Department of Physics, Southern University and A&M College, Baton Rouge, LA 70813, USASolid State Ionics and Surface Science Laboratory, Department of Physics, Southern University and A&M College, Baton Rouge, LA 70813, USASolid State Ionics and Surface Science Laboratory, Department of Physics, Southern University and A&M College, Baton Rouge, LA 70813, USAAcid-doped poly(2,2′-m-phenylene-5,5′-bibenzimidazole) membranes have been prepared and used to assemble membrane electrode assemblies (MEAs) with various contents of PBI (1–30 wt.%) in the gas diffusion electrode (GDE). The MEAs were tested in the temperature range of 140∘C–200∘C showing that the PBI content in the electrocatalyst layer influences strongly the electrochemical performance of the fuel cell. The MEAs were assembled using polyphosphoric acid doped PBI membranes having conductivities of 0.1 S cm−1 at 180∘C. The ionic resistance of the cathode decreased from 0.29 to 0.14 Ohm-cm2 (180∘C) when the content of PBI is varied from 1 to 10 wt.%. Similarly, the mass transfer resistance or Warburg impedance increased 2.5 times, reaching values of 6 Ohm-cm2. 5 wt.% PBI-based MEA showed the best performance. The electrochemical impedance measurements were in good agreement with the fuel cell polarization curves obtained, and the optimum performance was obtained when overall resistance was minimal.http://dx.doi.org/10.4061/2011/261065 |
| spellingShingle | Javier Parrondo Chitturi Venkateswara Rao Sundara L. Ghatty B. Rambabu Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs International Journal of Electrochemistry |
| title | Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs |
| title_full | Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs |
| title_fullStr | Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs |
| title_full_unstemmed | Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs |
| title_short | Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs |
| title_sort | electrochemical performance measurements of pbi based high temperature pemfcs |
| url | http://dx.doi.org/10.4061/2011/261065 |
| work_keys_str_mv | AT javierparrondo electrochemicalperformancemeasurementsofpbibasedhightemperaturepemfcs AT chitturivenkateswararao electrochemicalperformancemeasurementsofpbibasedhightemperaturepemfcs AT sundaralghatty electrochemicalperformancemeasurementsofpbibasedhightemperaturepemfcs AT brambabu electrochemicalperformancemeasurementsofpbibasedhightemperaturepemfcs |