Preparation and Properties of F-Doped PrBa<sub>0.8</sub>Sr<sub>0.2</sub>Co<sub>2</sub>O<sub>5+δ</sub> Perovskite Cathode Materials
F-doped PrBa<sub>0.8</sub>Sr<sub>0.2</sub>Co<sub>2</sub>O<sub>5+δ−x</sub>F<sub>x</sub> (PBSCF<sub>x</sub>, <i>x</i> = 0, 0.025, 0.05, 0.075, 0.1) cathode powder was synthesized by the sol–gel method. X-ray diffractio...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/5/1140 |
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| Summary: | F-doped PrBa<sub>0.8</sub>Sr<sub>0.2</sub>Co<sub>2</sub>O<sub>5+δ−x</sub>F<sub>x</sub> (PBSCF<sub>x</sub>, <i>x</i> = 0, 0.025, 0.05, 0.075, 0.1) cathode powder was synthesized by the sol–gel method. X-ray diffraction results showed that all the samples doped with F exhibited a typical tetragonal perovskite structure without a heterophase. F doping can effectively reduce the thermal expansion coefficient (TEC) of the cathode materials, which decreased from 25.3699 × 10<sup>−6</sup> K<sup>−1</sup> of PBSC to 23.5295 × 10<sup>−6</sup> K<sup>−1</sup> of PBSCF<sub>0.1</sub>. The area-specific resistance (ASR) of PBSCF<sub>0.05</sub> was 0.0207 Ω·cm<sup>2</sup> at 800 °C, with a conductivity of 1637.27 S·cm<sup>−1</sup> and maximum power density of 856.08 mW·cm<sup>−2</sup>. Its performance had slight decay after 100 h at 800 °C. F doping significantly improved the electrochemical performance of this cathode material for solid oxide fuel cells (SOFCs). |
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| ISSN: | 1420-3049 |