Performance Enhancement of La<sub>0.3</sub>Ca<sub>0.7</sub>Fe<sub>0.7</sub>Cr<sub>0.3</sub>O<sub>3-δ</sub>Air Electrodes by Infiltration Methods
Bibliographic record
Abstract
Our recent studies have shown that La0.3Ca0.7Fe0.7Cr0.3O3-δ (LCFCr) is an extremely promising material for use as an air electrode in reversible solid oxide cells (RSOFCS), due to its excellent activity towards the oxygen reduction and evolution reactions. LCFCr has also been shown to be a very active catalyst for CO2/CO reactions at the fuel electrode, thus making it a good candidate for use in symmetrical RSOFCs. In the present work, GDC and GDC + LCFCr polymeric precursor solutions were infiltrated into a porous LCFCr scaffold to further enhance the performance, producing a high surface area, nanoporous coating on the LCFCr surface. GDC infiltration resulted in a ca. 2-fold decrease in polarization resistance, specifically lowering the high frequency resistance, which is associated with the electrode/electrolyte interface. When the porous LCFCr electrode structure was co-infiltrated with GDC + LCFCr, the resistance of both the high and low frequency processes decreased, which according to our model, indicates that the quality of both the electrode/electrolyte (high frequency) and solid/gas (low frequency) interfaces were improved. Overall, it was shown to be possible to reduce the polarization resistance of the LCFCr air electrode by up to ca. 2.5 times using these infiltration approaches.
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How this classification was reachedexpand
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 | 0.006 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.003 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.004 | 0.001 |
| Research integrity | 0.001 | 0.004 |
| 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 itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
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".