Nanostructured polycrystalline Ni<sub>3</sub>S<sub>2</sub> as electrode material for lithium ion batteries
Why this work is in the frame
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Bibliographic record
Abstract
Abstract We report the facile synthesis of nanostructured polycrystalline nickel sulphide (NP-Ni 3 S 2 ) on Ni foil at 750 and 800 °C by employing powder vapor transport technique. X-ray diffraction patterns (XRD) confirms the formation of polycrystalline Ni 3 S 2 phase with rhombohedral structure. Raman spectroscopy and x-ray photo-electron spectroscopy (XPS) further confirms the formation of Ni 3 S 2 phase. Scanning electron microscopy (SEM) reveals the formation of flower shaped nanostructures of NP-Ni 3 S 2 material. As an electrode material of Li + batteries, the initial discharge capacities for NP-Ni 3 S 2 materials deposited at 750 and 800 °C are found to be ∼2649 mAh g −1 and ∼1347 mAh g −1 , respectively with initial capacity loss of ∼1067 mAh g −1 and ∼363 mAh g −1 after first cycle and capacities of ∼931 mAh g −1 and ∼818 mAh g −1 after 30 cycles for a current density of 60 mA g −1 . An excellent capacity retention for NP-Ni 3 S 2 material synthesized at 800 °C is due to its larger surface area and shorter diffusion length for mass and charge transport brought about by the flower-like porous nanostructures showing that the NP-Ni 3 S 2 material synthesized at higher temperatures is more suitable as electrode material for Li + batteries.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| 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