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| Hauptseite > Publikationsdatenbank > An assessment of electroneutrality implementations for accurate electrochemical ion transport models > print |
| Hauptseite > Publikationsdatenbank > An assessment of electroneutrality implementations for accurate electrochemical ion transport models > print |
| 001 | 1034277 | ||
| 005 | 20250203133232.0 | ||
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| 100 | 1 | _ | |a Janotta, Benjamin |0 P:(DE-Juel1)191435 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a An assessment of electroneutrality implementations for accurate electrochemical ion transport models |
| 260 | _ | _ | |a New York, NY [u.a.] |c 2024 |b Elsevier |
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| 520 | _ | _ | |a During the diffusion and migration of ions in electrolytes, the electrodynamic ion-ion interactions prevent charge separation despite different ionic mobilities, ultimately enforcing electroneutrality in the bulk electrolyte. To model ion transport accurately, a method to enforce electroneutrality must be implemented. In this study, four strategies to implement electroneutrality are discussed and evaluated. The ion distributions that result from a transport model with the different electroneutrality implementations are calculated, considering various electrolytes and sets of electrochemical parameters. The meaningfulness and applicability of each implementation are assessed through spatial charge accumulations, transference numbers, and experimental data from the literature. Combining the electrochemical ion transport models with the electroneutrality constraint for all ions is shown to result in an overdetermined system of equations if the driving forces are calculated under neglection of diffusion potentials. The often-reported model simplification of using the electroneutrality constraint to resolve the transport of one specific species explicitly results in non-physically correct mass transport. A practical approach to precisely describe the measured physicochemical ion movements is obtained by equilibrating spatial charges with the ion conduction for every time step in the ion transport model, which is reasonably applicable to multi-ion systems in three-dimensional frameworks. This comprehensive assessment aims to guide readers in selecting an appropriate electroneutrality implementation framework for ion transport models. |
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