Synergetic Effect between Ti and Al on the Cycling Stability of MgNi-Based Metal Hydride Electrodes
Bibliographic record
Abstract
Amorphous MgNi, , and compounds have been prepared by mechanical alloying and evaluated as metal hydride electrodes. The electrode retains 67% of its initial discharge capacity after , compared to 54% for and 34% for MgNi. This confirms the synergetic effect between Ti and Al that improves the cycling stability of the MgNi-based metal hydride electrode. X-ray photoelectron spectroscopy shows the presence of and onto the particles. These two oxides appear to be very efficient at preventing the accumulation of onto the particles upon cycling as suggested by X-ray diffraction analyses and cyclic voltammetry experiments. Moreover, on the basis of the evolution with cycling of the ratio of the hydrogen diffusion coefficient to the particle radius , material appears less sensitive to pulverization. This is in accordance with an increase of the maximal amount of hydrogen absorbed into before a significant decay in capacity occurs. Finally, we have fabricated a electrode with large particles (diameter ) having, under controlled charging conditions, a capacity decay rate as low as that observed for a commercial -type alloy (i.e., ).
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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 | 0.003 | 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 | 0.000 | 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".