Investigation of Proton Transport in the Catalyst Layer of PEM Fuel Cells by Electrochemical Impedance Spectroscopy
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Bibliographic record
Abstract
The proton conductivity of the catalyst layer is an essential parameter for the design and optimization of PEM fuel cells cathodes. Few methods have been proposed to measure this quantity. In this study we tested two methods based on electrochemical impedance spectroscopy (EIS) measurements performed in H2/N2 and in H2/O2, respectively. The EIS H2/N2 method allows the quantification of the CL proton resistance at equilibrium, and in principle could be used to obtain catalyst layer microstructural information. The EIS H2/O2 method allows the quantification of both ohmic and CL proton resistances under load. According to our results, the EIS H2/N2 method is preferable because it is faster to perform, the data analysis is simpler, and provides the CL resistance at equilibrium.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it