Effects of Electrode Density on the Safety of NCA Positive Electrode for Li-Ion Batteries
Bibliographic record
Abstract
The effect of electrode density on safety was investigated with Li[Ni0.8Co0.15Al0.05]O2 (NCA) electrodes in the presence of 1.0M LiPF6 EC:DEC (1:2 v/v ratio) using accelerating rate calorimetry (ARC). The densities of the electrodes were 1.6 g/cm3, 2.0 g/cm3, and 2.3 g/cm3, respectively. Denser electrodes showed inferior thermal stability compared to porous electrodes. ARC tests with ground electrode powder in the presence of EC:DEC (1:2 v/v) solvent, with and without LiPF6 salt, show that the denser electrode has lower thermal stability because it contains less LiPF6. A charged NCA electrode in 0.7M LiBOB EC:DEC (1:2 v/v) electrolyte shows worse thermal stability than in 1.0M LiPF6 EC:DEC (1:2 v/v) electrolyte. These results may be useful for researchers and engineers interested in designing safe electrodes using NCA positive electrode material.
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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 | 0.000 | 0.001 |
| 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 | 0.001 |
| 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".