Transport of ions in a mixed Na+/K+ ion conducting glass - electrodiffusion profiles and electrochemical interphase formation
2016 | journal article. A publication with affiliation to the University of Göttingen.
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Transport of ions in a mixed Na+/K+ ion conducting glass - electrodiffusion profiles and electrochemical interphase formation
Martin, J.; Mehrwald, S.; Schaefer, M.; Kramer, T.; Jooss, C. & Weitzel, K.-M. (2016)
Electrochimica Acta, 191 pp. 616-623. DOI: https://doi.org/10.1016/j.electacta.2016.01.061
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Details
- Authors
- Martin, Johannes; Mehrwald, Sarah; Schaefer, Martin; Kramer, Thilo; Jooss, Christian; Weitzel, Karl-Michael
- Abstract
- The competition of Na+ ion versus K+ ion transport in a mixed alkali borosilicate glass has been investigated by low energy bombardment induced ion transport employing Cs+ ions as the foreign ion. Electrodiffusion causes the replacement of Na+ and K+ down to about 200 nm below the surface of the glass. Beyond this electrodiffusion front (in the direction of ion transport) K+ ions accumulate to a density above the bulk concentration while Na+ is further depleted towards the backside electrode. At the backside electrode only Na is electrodeposited since the electrical potential does not allow for K electrodeposition. A full simulation of the electrodiffusion profiles reveals the complete concentration dependence of the diffusion coefficients of the Na+ and K+ ions. (C) 2016 Elsevier Ltd. All rights reserved.
- Issue Date
- 2016
- Status
- published
- Publisher
- Pergamon-elsevier Science Ltd
- Journal
- Electrochimica Acta
- ISSN
- 1873-3859; 0013-4686
- Sponsor
- Deutsche Forschungsgemeinschaft (DFG)