Revealing the Electrochemistry in a Voltaic Cell by In Situ Electron Microscopy
Bibliographic record
Abstract
Abstract The Voltaic Pile, invented by Italian physicist Alessandro Volta in 1799, was the first electrochemical energy storage device created by mankind. It consists of alternatively stacked copper (Cu) and zinc (Zn) metal disks separated by brine soaked cloth cardboard as the electrolyte. Although fabricated more than two centuries ago, the electrochemistry of the Voltaic Cell has not been fully understood. Understanding the microscopic working principle of the Voltaic Cell not only has historic meaning but also provides a foundation for modern battery technologies, corrosion science and other electrochemical processes. Herein an in situ microscopic observation of the electrochemical reactions in a Voltaic Cell comprised of a Cu cathode, Zn anode and an ionic liquid‐based electrolyte was reported. During discharge, Zn stripping initiated from pits formation at the surface of the Zn anode, which then propagated along the longitudinal direction of the nanorod. Concurrently Cu nanoparticles were electrodeposited on the Cu cathode. Atomic scale imaging revealed the formation of zinc fluoride (ZnF 2 ) solid electrolyte interphase (SEI) layer of about 2 nm, which grew semicoherently with the Zn anode and dictates the stripping kinetics. Our studies provide not only an in‐depth understanding of the electrochemistry of the Voltaic Cell, but also a generic technique for in situ studies of metal plating/stripping and corrosion at nanometer to atomic resolution.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| 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".