Reduction of Interfacial Gaps and Enhancement of PEM Fuel Cell Performance Via a New CCL|MPL Architecture
Bibliographic record
Abstract
A new enhanced architecture for fuel cell membrane electrode assemblies (MEAs) which incorporates deposition of an MPL layer directly on a catalyst coated membrane (CCM) is demonstrated. This modified MPL helps to reduce interfacial gaps present between the catalyst layer and the conventional MPL-coated gas diffusion layer of the MEAs and reduces water accumulation, which ultimately results in higher power densities (Figure 1). Three types of commercial carbon black with different porosity and hydrophilicity were directly deposited on the low loading cathode catalyst layers (0.1 mgPt cm−2) of membrane electrode assemblies (MEAs) used in H2/O2 fuel cells. Among the carbon materials investigated, Acetylene Black- and Vulcan XC72R-based modified MPLs (mass loadings ~ 0 – 1.0 mg cm−2) lead to higher performance in the high current density regions due to their lower porosity and higher hydrophobicity. Detailed information about this approach, preparation and performance characteristics will be discussed during the meeting. Figure 1
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".