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| Home > Publications database > Optimization of Single Cell PEM Electrolyzer Design and Operating Conditions |
| Home > Publications database > Optimization of Single Cell PEM Electrolyzer Design and Operating Conditions |
| Poster (Other) | FZJ-2026-00563 |
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2023
Abstract: During the last decade, hydrogen production by water electrolysis has become a significant sector of the world's renewable energy market. It is due to the modularity of electrolysis that allows power-to-gas plants to be built on a megawatt scale.1 Among the other electrolysis units, polymer electrolyte membrane (PEM) electrolyzer fulfils the requirements for fast dynamic response, high current density, ease of implementation, relatively high efficiency, and high hydrogen purity.2,3 Though it is technologically advanced, its commercialization is still at an early stage.Experimental, analytical, and numerical methods are available for identifying the appropriate parameters for a PEM electrolyzer.4,5 As part of this study, we utilized experimental methods, such as current-voltage measurements and electrochemical impedance spectroscopy in order to optimize a custom-built single cell PEM electrolyzer in terms of geometric and parametric operations.Electrochemical testing was carried out on a single cell of 17.64 cm2 active area with carbon fibres as cathode-GDLs, using four commercially available MEAs containing Nafion N115. In Figure 1, we observed that the addition of a Pt-Ti based mesh with carbon fibres on the cathode side has a positive impact on the electrolyzer performance due to the mechanical support it provides. The experiments showed that the cell assembly with the appropriate material combination can have a substantial influence on DC and AC resistances. We have also observed how contaminants affect the cell performance. Regarding the operating conditions, measurements with varying temperature, flow rate, and current density were conducted, to establish the optimal parameters for the performance of the cell.
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