Influence of the strontium content on the performance of La1-xSrxMnO3/Bi1.5Er0.5O3 composite electrodes for low temperature Solid Oxide Fuel Cells
| Autor: | Anne-Sophie Mamede, Martin Pajot, Edouard Capoen, Victor Duffort, Rose-Noëlle Vannier |
|---|---|
| Přispěvatelé: | Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, ANR-18-CE05-0001,BIBELOTS,SOFC basse température à base d'oxyde de bismuth(2018), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Catalyse et de Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Ecole Centrale de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ANR-18-CE05-0001,BIBELOTS,BISMUTH BASED LOW TEMPERATURE SOFC(2018) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Oxide Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 7. Clean energy 01 natural sciences Bismuth chemistry.chemical_compound Electrical and Electronic Engineering Physical and Theoretical Chemistry Polarization (electrochemistry) Strontium Low temperature solid oxide fuel cells Renewable Energy Sustainability and the Environment [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Microstructure 0104 chemical sciences chemistry Chemical engineering Low-energy ion scattering Solid oxide fuel cell 0210 nano-technology Stabilized bismuth oxides Lanthanum strontium manganese oxides |
| Zdroj: | Journal of Power Sources Journal of Power Sources, Elsevier, 2020, Journal of Power Sources, 450, pp.227649. ⟨10.1016/j.jpowsour.2019.227649⟩ Journal of Power Sources, 2020, Journal of Power Sources, 450, pp.227649. ⟨10.1016/j.jpowsour.2019.227649⟩ Journal of Power Sources, 2020, Journal of Power Sources, 450, pp.227649 |
| ISSN: | 0378-7753 1873-2755 |
| DOI: | 10.1016/j.jpowsour.2019.227649⟩ |
| Popis: | International audience; The possibility to use bilayer electrolytes based on bismuth oxide conductors should lead to a drastic decrease of solid oxide fuel cell (SOFC) operation temperature and calls for a reevaluation of some of the parameters optimized for high temperature applications. In this work we reinvestigate the promising La1-xSrxMnO3/Bi1.5Er0.5O3 (LSM/ESB) composite electrodes, varying the strontium content from x ~ 0.2, the typical high temperature LSM composition, to evaluate the optimum composition. Increasing the strontium content up to x 1⁄40.4–0.5 leads to a 14% decrease of the activation energy, resulting in a 50% decrease in the polarization resistance of symmetric cells at 500 °C compared to the traditional La0.85Sr0.15MnO3 composition with similar microstructure. The electrode performance is deteriorated by further increase in the strontium content. Based on surface composition, investigated by low energy ion scattering, we show that the SrO surface segregation proposed as the main deterioration mechanism for LSM based HT-SOFC is not an issue below 800 °C. Furthermore, we propose that the increase in performance is related to the decrease of cationic vacancies in LSM observed for high strontium content, which may help the oxygen dissociation and surface transport. |
| Databáze: | OpenAIRE |
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