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Updated: May 20, 2025

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
Modification of B-site substituted by high-valence Nb in PrBa0.5Sr0.5Co1.5Fe0.5O5+ as a highly active air electrode
Qiming Guo1, Songbo Li1, Shengli An2
1School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology Baotou 014010 China songboli2021@hotmail.com.
Abstract:
Solid oxide fuel cells (SOFCs) are a new type of power generation technology that directly converts chemical energy into electrical energy with advantages, such as low environmental pollution and high conversion efficiency. However, these fuel cells suffer challenges, including high operating temperatures and poor stability. In this paper, PrBa0.5Sr0.5Co1.5- Nb Fe0.5O5+ series materials were prepared via the sol-gel method and applied as cathode material in SOFCs. X-ray diffraction patterns reveal that the addition of Nb to PrBa0.5Sr0.5Co1.5Fe0.5O5+ did not change its crystal structure but increased the cell volume, leading to lattice expansion and improved thermal stability. Electron paramagnetic resonance quantitative analysis was conducted on PrBa0.5Sr0.5Co1.5- Nb Fe0.5O5+ . At 800 °C, the lowest area specific resistance (ASR) at x = 0.04 was 0.0336 Ω cm2, indicating that the addition of Nb significantly improved the oxygen reduction reaction catalytic activity. The power density of the electrolyte-supported single cell increased by 110.6 mW cm-2. Thus, Nb addition enhances the electrochemical performance of PBSCF cathode materials, and PBSCFNb0.04 is a promising cathode material for SOFCs.
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