| Autor: |
Rodgers, Marianne, Agarwal, Rohit, Pearman, Benjamin P., Li, Bo, Slattery, Darlene, Choi, Pyoungho, Mohajeri, Nahid, Bonville, Leonard, and, Kunz, Fenton, James M. |
| Zdroj: |
ECS Transactions; October 2008, Vol. 16 Issue: 2 p1951-1959, 9p |
| Abstrakt: |
Durability studies were carried out on membrane electrode assemblies (MEA)s containing commercial Nafion(r) and perfluorinated ionomer/PTFE composite membranes that include the incorporation of phosphotungstic acid (PTA). Fuel cells were run for 100 hours at 30% relative humidity, 90 and 100 oC, and open circuit voltage. The voltage was monitored during the durability test, as was the condensate water for presence of fluoride ions. Crossover current, electrochemical active areas, and polarization curves were evaluated pre- and post- test. Improved degradation behavior was observed for the perfluorinated ionomer/PTA/PTFE composite membranes compared to the commercial Nafion(r) membranes under both testing conditions. Knowledge of the effect of operating conditions on the properties of a MEA over time provides important degradation information that can be used in the design of long-lasting MEAs. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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