Dynamical theory for the battery's electromotive force
| Autor: | Alicki, Robert, Gelbwaser-Klimovsky, David, Jenkins, Alejandro, von Hauff, Elizabeth |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Chem. Chem. Phys. 23, 9428 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1039/D1CP00196E |
| Popis: | We propose a dynamical theory of how the chemical energy stored in a battery generates the electromotive force (emf). In this picture, the battery's half-cell acts as an engine, cyclically extracting work from its underlying chemical disequilibrium. We show that the double layer at the electrode-electrolyte interface can exhibit a rapid self-oscillation that pumps an electric current, thus accounting for the persistent conversion of chemical energy into electrical work equal to the emf times the separated charge. We suggest a connection between this mechanism and the slow self-oscillations observed in various electrochemical cells, including batteries, as well as the enhancement of the current observed when ultrasound is applied to the half-cell. Finally, we propose more direct experimental tests of the predictions of this dynamical theory. Comment: 11 pages, 5 figures + appendix (2 pages, no figures). v3: some points further clarified in text, references improved, minor typos fixed. To be published in PCCP |
| Databáze: | arXiv |
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