Szczegóły publikacji
Opis bibliograficzny
A $SmBaCo_{2}O_{5+\delta}$ double perovskite with epitaxially grown $Sm_{0.2}Ce_{0.8}O_{2-\delta}$ nanoparticles as a promising cathode for solid oxide fuel cells / Zhihong Du, Keyun Li, Hailei Zhao, Xu Dong, Yang Zhang, Konrad ŚWIERCZEK // Journal of Materials Chemistry. A ; ISSN 2050-7488. — 2020 — vol. 8 iss. 28, s. 14162–14170. — Bibliogr. s. 14169–14170. — Publikacja dostępna online od: 2020-07-28. — K. Świerczek – dod. afiliacja: AGH Centre of Energy ; K. Li - afiliacja: University of Science and Technology Beijing, China
Autorzy (6)
- Du Zhihong
- Li Keyun
- Zhao Hailei
- Dong Xu
- Zhang Yang
- AGHŚwierczek Konrad
Dane bibliometryczne
| ID BaDAP | 129849 |
|---|---|
| Data dodania do BaDAP | 2020-09-09 |
| Tekst źródłowy | URL |
| DOI | 10.1039/d0ta05602b |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Materials Chemistry, A |
Abstract
Modified by Sm0.2Ce0.8O2-delta(SDC) nanoparticles (NPs), SmBaCo2O5+delta(SBCO) double perovskite oxide is evaluated as a promising cathode material for intermediate temperature solid oxide fuel cells. The SDC NPs are epitaxially grown on the surface of SBCO with (220) planes of SDC aligning smoothly to (020) or (100) planes of SBCO, forming a tight, coherent connection at the interface. The influence of this modification on thermal expansion, oxygen diffusion, electrical conductivity and electrochemical properties is investigated thoroughly in this work. The designed SBCO-SDC cathode material demonstrates a lower thermal expansion coefficient (TEC), similar to 16.4 x 10(-6)K(-1), than that of the unmodified SBCO, similar to 20.9 x 10(-6)K(-1). While SDC coating results in a decreased total electrical conductivity, it facilitates oxygen bulk diffusion and improves the surface exchange reaction kinetics. Coating with SDC NPs can accelerate the rate-determining process of dissociation of the absorbed molecular oxygen, especially at intermediate temperatures. Accordingly, the constructed symmetrical cell with the La0.8Sr0.2Ga0.8Mg0.2O3-delta(LSGM) electrolyte shows lower polarization resistance values, if the SBCO-SDC cathode is utilized. Also, the LSGM electrolyte-supported (300 mu m) full cell is found to deliver a high power density of 800 mW cm(-2)at 800 degrees C. Owing to the strong and coherent interfacial connection, the developed cathode demonstrates a relatively steady electrochemical performance.
