Characterization of La[sub 0.5]Ba[sub 0.5]CoO[sub 3−δ] as a SOFC Cathode Material
Bibliographic record
Abstract
This study reports the physical properties and electrochemical behavior of (LBC), a perovskite material and a potential candidate for the solid oxide fuel cell (SOFC) cathode. LBC was synthesized by a solid-state route, and phase purity was checked by X-ray diffraction measurement. Thermogravimetric analysis of LBC was performed both in air and in argon atmosphere to observe its phase stability. Total conductivity, measured by a four-point dc polarization method, exhibited a pseudometallic-type behavior. Ionic conductivity was determined in air over a temperature range by a dc polarization technique using electron-blocking electrodes. The high total conductivity, combined with a sufficiently high ionic conductivity ( at ), indicates that LBC possesses a certain degree of mixed ionic–electronic conducting nature. The oxygen reduction behavior of porous LBC electrodes on a gadolinium-doped ceria electrolyte was studied in a symmetrical cell configuration by impedance spectroscopy. The tolerance and the high temperature stability of the cell were also investigated. Impedance spectra obtained at zero dc bias conditions consisted of two semicircular arcs, which indicate that the overall oxygen reduction comprises at least two distinct processes. The area specific resistance (ASR) for electrode polarization was determined over a wide range of temperatures . The ASR value at was determined to be , which offers the promise of utilizing LBC as a cathode for low temperature SOFCs.
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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 | 0.001 | 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 | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".