Mathematical Modelling and Experimental Analysis of Thin, Low-Loading Fuel Cell Electrodes
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Bibliographic record
Abstract
Cathode electrode performance quickly degrades at platinum loadings below 0.1 mg/cm 2 . This performance degradation has been attributed to catalyst oxide coverage, local micro-scale gas transport limitations at the catalyst sites, and two-phase flow. OpenFCST, an open-source fuel cell simulation package, is used to develop a membrane electrode assembly (MEA) model, and a catalyst layer micro-structural model, of low loading inkjet printed fuel cells. Simulations of the inkjet printed catalyst layer reconstructions estimate that the effective gas transport in the electrode is of the order of 10 -4 cm 2 /s and it is dominated by Knudsen diffusion. The macro-scale MEA mathematical model is used to estimate cell performance, cell and catalyst layer ohmic resistances, and current, reactant and oxide coverage distributions in the electrode. MEA model cell performance and resistance are in reasonable agreement with experimental data obtained for the electrodes under a variety of oxygen partial pressures. Results show appropriate kinetic, and local transport resistance models, are necessary in order to capture the experimental trends observed at different loadings and at limiting current densities, respectively.
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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