Increasing Fuel Cell Efficiency by Using Ultra-Low Equivalent Weight Ionomers
| Autor: | Matthew Lindell, Michael A. Yandrasits, Mark Schaberg, Michael Kurkowski |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Proton 020209 energy Proton exchange membrane fuel cell 02 engineering and technology Polymer Conductivity Membrane chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering Electrochemistry Side chain Equivalent weight Chemical stability |
| Zdroj: | The Electrochemical Society Interface. 26:49-53 |
| ISSN: | 1944-8783 1064-8208 |
| DOI: | 10.1149/2.f05171if |
| Popis: | Proton exchange membranes based on perfluorosulfonic acid (PFSA) ionomers are the industry standard for proton exchange membrane fuel cells. These ionomers offer remarkable proton conductivity and chemical stability, especially when fully hydrated with water. Performance, however, rapidly decreases as the membranes dry out, thereby requiring external humidification equipment. Because of this, there exists a need for new ionomers that can maintain high proton conductivity at low humidification levels. Perfluoro bissulfonimides have acid strengths similar to those of sulfonic acids and can be used to extend the polymer side chain with an additional protogenic group. These polymers have been designated PerfluoroSulfonImide Acid (PFIA) or PerfluoroIonene Chain Extended (PFICE) ionomers. Compared to PFSAs, these ionomers have improved conductivities under all humidity conditions, however, the benefit of these improvements are most significant under the driest conditions. |
| Databáze: | OpenAIRE |
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