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Article Abstract
Stabilized bismuth oxide material with fluorite structure (δ-BiO) has been studied as a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs) due to its high oxygen ion conductivity in mediate temperature. Especially, the ternary system BiO-ErO-WO is widely concerned for its high ionic conductivity and thermal stability. In this study, regarding its low melting point, the possibility to deposit dense BiO-ErO-WO ((BiO) (ErO) (WO), EWSB) electrolyte by plasma spraying was examined. It was confirmed that the sintered EWSB bulk presents a high ion conductivity of 0.34 S cm at 750 °C and excellent stability that indicates no structure transformation and conductivity degradation after annealing at 600 °C for 1000 h. The phase structure and cross-sectional microstructure of plasma-sprayed EWSB were characterized by XRD and SEM. Results showed that the as-plasma-sprayed EWSB presents a dense microstructure with well bonded lamellae. The XRD showed the formation of EWSB with δ-phase and a trace of β-phase, while the β-phase disappeared after annealing at 750 °C for 10 h. The deposited EWSB electrolyte presented the excellent ionic conductivity of 0.26 S cm at 750 °C which can be directly applied to SOFC at intermediate temperature.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8730755 | PMC |
| http://dx.doi.org/10.1007/s11666-021-01314-8 | DOI Listing |
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