Perovskite Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3–δ </sub>as a Bifunctional Air Electrode for Zinc-Air Batteries
Bibliographic record
Abstract
Perovskite Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3–δ (BSCF) powder was prepared through a sol-gel method and characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis and transmission electron microscopy (TEM). The electrocatalytic properties of BSCF/C composites towards the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) were studied using the rotating disk electrode (RDE) technique in 6 M KOH. The results showed that the synthesized perovskite BSCF exhibits activities for both ORR and OER, especially for OER. Cell tests demonstrated that the synthesized material reaches an ORR activity of 83 mAcm -2 at a potential of 0.9 V and an OER activity of 117 mAcm -2 at a potential of 2.2 V at about the 100 th cycle. With increasing cycle numbers, both OER and ORR activities had noticeable degradation.
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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) | 0.003 | 0.003 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.003 | 0.004 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.004 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.002 | 0.005 |
| Insufficient payload (model declined to judge) | 0.000 | 0.004 |
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".