Understanding Irreversible Capacity in Li[sub x]Ni[sub 1−y]Fe[sub y]O[sub 2] Cathode Materials
Bibliographic record
Abstract
A study was made of lithium‐ion cell cathode materials. Through a series of experiments including cyclic voltammetry, X‐ray diffractometry, Mössbauer spectroscopy, in situ X‐ray diffractometry, and in situ Mössbauer spectroscopy, it was determined that the phenomenon commonly referred to as "irreversible capacity" in lithium‐ion cell cathode materials is a misnomer. Cells utilizing with 0.05 ≤ y ≤ 0.10 as the cathode active material (vs. a lithium metal anode) have been reversibly cycled between 0.64 ≤ x ≤ 1.00 (100 mAh/g). The recovery of the "irreversible capacity" involved a discharge through a ∼2 V plateau during which it is believed that a surface layer of is present. Also, a new transition has been observed between two O3 phases (belonging to the space group ) during charge beginning at the start of charge and reaching completion by x ≈ 0.82 (50 mAh/g). The cause of this transition as well as the formation of the surface layer during discharge are explained in terms of the mobility of lithium ions in the intercalation host being related to the availability of monovacancy and divacancy hopping paths. © 2000 The Electrochemical Society. All rights reserved.
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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) | 0.000 | 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 | 0.001 | 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".