Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities
Barium stannate is known as a promising proton-conducting material for clean energy applications. In this work, we elucidate the effect of the interaction of protons and oxygen vacancies with acceptor impurities on proton conduction in acceptor-doped BaSnO<sub>3</sub>. The analysis relie...
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MDPI AG
2022-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/14/4795 |
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| author | Lev Putilov Vladislav Tsidilkovski |
| author_facet | Lev Putilov Vladislav Tsidilkovski |
| author_sort | Lev Putilov |
| collection | DOAJ |
| description | Barium stannate is known as a promising proton-conducting material for clean energy applications. In this work, we elucidate the effect of the interaction of protons and oxygen vacancies with acceptor impurities on proton conduction in acceptor-doped BaSnO<sub>3</sub>. The analysis relies on our theoretical developments in hydration and proton hopping in proton-conducting perovskites. The transport theory, based on the master equation and effective medium approximation, provides the analytical description of hopping conduction considering the effects of disorder and changes in the potential energy landscape for protons caused by acceptor impurities. Using the proposed approach, we establish the dependence of the proton mobility and conductivity on the energies of the acceptor-bound states of ionic defects and external conditions. It is shown that the considered interactions can substantially affect the effective activation energies and prefactors of these transport coefficients. We also demonstrate that the correlation between the ionic radius <i>r</i><sub>A</sub> of an acceptor impurity and the energies of its interaction with ionic defects leads to a non-monotonic dependence of the proton conductivity on <i>r</i><sub>A</sub>. The obtained results are in reasonable agreement with the experimental data on the bulk conductivity of BaSnO<sub>3</sub> doped with different acceptors. |
| first_indexed | 2024-03-09T10:16:51Z |
| format | Article |
| id | doaj.art-e64bf71b1f2e4ded973461fee541c4e5 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:16:51Z |
| publishDate | 2022-07-01 |
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| spelling | doaj.art-e64bf71b1f2e4ded973461fee541c4e52023-12-01T22:22:44ZengMDPI AGMaterials1996-19442022-07-011514479510.3390/ma15144795Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor ImpuritiesLev Putilov0Vladislav Tsidilkovski1Institute of High-Temperature Electrochemistry, 20 Akademicheskaya St., 620990 Ekaterinburg, RussiaInstitute of High-Temperature Electrochemistry, 20 Akademicheskaya St., 620990 Ekaterinburg, RussiaBarium stannate is known as a promising proton-conducting material for clean energy applications. In this work, we elucidate the effect of the interaction of protons and oxygen vacancies with acceptor impurities on proton conduction in acceptor-doped BaSnO<sub>3</sub>. The analysis relies on our theoretical developments in hydration and proton hopping in proton-conducting perovskites. The transport theory, based on the master equation and effective medium approximation, provides the analytical description of hopping conduction considering the effects of disorder and changes in the potential energy landscape for protons caused by acceptor impurities. Using the proposed approach, we establish the dependence of the proton mobility and conductivity on the energies of the acceptor-bound states of ionic defects and external conditions. It is shown that the considered interactions can substantially affect the effective activation energies and prefactors of these transport coefficients. We also demonstrate that the correlation between the ionic radius <i>r</i><sub>A</sub> of an acceptor impurity and the energies of its interaction with ionic defects leads to a non-monotonic dependence of the proton conductivity on <i>r</i><sub>A</sub>. The obtained results are in reasonable agreement with the experimental data on the bulk conductivity of BaSnO<sub>3</sub> doped with different acceptors.https://www.mdpi.com/1996-1944/15/14/4795proton conductionacceptor-doped oxide perovskitesacceptor impuritiestrappingBaSnO<sub>3</sub> |
| spellingShingle | Lev Putilov Vladislav Tsidilkovski Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities Materials proton conduction acceptor-doped oxide perovskites acceptor impurities trapping BaSnO<sub>3</sub> |
| title | Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities |
| title_full | Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities |
| title_fullStr | Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities |
| title_full_unstemmed | Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities |
| title_short | Proton Conduction in Acceptor-Doped BaSnO<sub>3</sub>: The Impact of the Interaction between Ionic Defects and Acceptor Impurities |
| title_sort | proton conduction in acceptor doped basno sub 3 sub the impact of the interaction between ionic defects and acceptor impurities |
| topic | proton conduction acceptor-doped oxide perovskites acceptor impurities trapping BaSnO<sub>3</sub> |
| url | https://www.mdpi.com/1996-1944/15/14/4795 |
| work_keys_str_mv | AT levputilov protonconductioninacceptordopedbasnosub3subtheimpactoftheinteractionbetweenionicdefectsandacceptorimpurities AT vladislavtsidilkovski protonconductioninacceptordopedbasnosub3subtheimpactoftheinteractionbetweenionicdefectsandacceptorimpurities |