Ultra-stable aqueous zinc-ion battery enabled by highly reversible Zn2+/Na+ co-intercalation chemistry
Why this work is in the frame
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Bibliographic record
Abstract
Rechargeable aqueous zinc-ion batteries (RAZBs) are a promising prospect among next-generation batteries because of their low cost and high safety, but they still suffer from severe electrochemical irreversibility. Herein, we report an ultra-stable RAZB enabled by reversible Zn2+/Na+ co-intercalation chemistry in the vanadium cathode. The additional de-/intercalation of Na+ besides Zn2+ alleviates the collapse of the vanadium-based cathode during cycling and significantly boosts the kinetics and stability of the full battery. We also find that this co-intercalation chemistry is applicable to a wide range of vanadium materials, all of which exhibit significantly enhanced cycle life and rate performance. In particular, the Zn0.3Na0.43V2O5 cathode that is combined with this co-intercalation mechanism retains over 90% of its capacity after 4,000 cycles with a discharge capacity of 209 mAh g−1 at 1 A g−1. The proposed Zn2+/Na+ co-intercalation chemistry provides the grounds for RAZB to reach the next stage in electrochemical performance.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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 it