Analysis of alkaline exchange membrane fuel cells performance at different operating conditions using DC and AC methods
| Autor: | Madeleine Odgaard, Tatyana V. Reshetenko, Alexey Serov, Debbie Schlueter |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Partial pressure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention Anode Dielectric spectroscopy chemistry law Electrode Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Polarization (electrochemistry) Platinum Power density |
| Zdroj: | Journal of Power Sources. 375:185-190 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2017.11.030 |
| Popis: | Membrane electrode assemblies (MEAs) for anion exchange membrane fuel cells (AEMFCs) were manufactured from commercial materials: Pt/C catalyst, A201 AEM and AS4 ionomer by using an industrial mass-production digital printing method. The MEA designs selected are close to those recommended by US Department of Energy, including low loading of platinum on the cathode side (0.2 mg cm−2). Polarization curves and electrochemical impedance spectroscopy (EIS) were applied for MEA evaluation in fuel cell conditions with variation of gas humidification and oxygen partial pressure (air vs oxygen). The typical impedance curves recorded at H2/O2 gas configuration consist of high- and medium-frequency arcs responsible for hydrogen oxidation and oxygen reduction, respectively. Operation with air as a cathode feed gas resulted in a decrease in AEMFC performance due to possible CO2 poisoning and mass transfer losses. At the same time, EIS demonstrated formation of a low frequency loop due to diffusion limitations. Despite the low loading of platinum on the cathode (0.2 mg cm−2), a peak power density of ∼330 mW cm−2 was achieved (at 50/50% of RH on anode and cathode), which is substantially higher performance than for AEMFC MEAs tested at similar conditions. |
| Databáze: | OpenAIRE |
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