High Room-Temperature Magnesium Ion Conductivity in Spinel-Type MgYb<sub>2</sub>Se<sub>4</sub> Solid Electrolyte
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Bibliographic record
Abstract
High Resolution Image Download MS PowerPoint Slide We present three magnesium selenide spinels, MgSc 0.4 Y 0.4 Er 0.4 Tm 0.4 Yb 0.4 Se 4, Mg 0.75 Sc 2 Se 3.5 Br 0.5 and MgYb 2 Se 4, as potential solid electrolytes (SE) for magnesium batteries. In particular, the latter spinel exhibits a room-temperature ionic conductivity exceeding 10 –4 S cm –1 and a low Mg 2+ migration barrier of 364 meV. The high ionic mobility is attributed to the low magnesium insertion energy revealed by density functional theory (DFT), which indicates a weak binding interaction between magnesium ions and the host lattice. Furthermore, like the two multicomponent spinels, MgYb 2 Se 4 exhibits lower electronic conductivity compared to previously studied MgB 2 Se 4 spinels (B = Sc, Y, Er, Tm) and a good electrochemical stability, making it a strong candidate for Mg 2+ SE applications.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.001 | 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