A dual modification strategy of highly active catalytic cathode for proton-conducting solid oxide fuel cell with Ni-doped PrBaFe1.9Mo0.1O6-δ

• Published in: Journal of power sources Vol. 606; p. 234591
• Main Authors: Yao, Penghui, Zhang, Jian, Qiu, Qianyuan, Zhao, Yicheng, Yu, Fangyong, Li, Yongdan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 30-06-2024
• Subjects: Cobalt-free cathode; Doping; Nanocomposite; Nickle; Proton-conductive fuel cell (PCFC); Cobalt-free cathode; Nanocomposite; Nickle; Proton-conductive fuel cell (PCFC); Doping
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2024.234591

The cathode catalytic activity and stability in a temperature range of 550–700 °C is crucial to the development of proton-conductive solid oxide fuel cells (PCFCs). A facile dual-modification strategy is developed for the design of Ni-doped PrBaFe1.9Mo0.1O6-δ (PBFMN), composed of a major perovskite and a minor NiO phases, as a cobalt-free cathode. The composite cathode PBFMN exhibits high catalytic activity and stability. Computational simulation indicates that the perovskite phase increases the oxygen vacancies and enhances the proton transfer, while nickel oxide nanoparticles improve oxygen adsorption and dissociation. The fuel cell with as-prepared PBFMN reached a peak power density 1.23 W cm−2 at 700 °C. The improved performance of the cell is mainly due to the fast ORR kinetics. This work provides a new insight into the design of cobalt-free cathode for a PCFC.
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•PBFMN cathode exhibits excellent ORR and proton transfer rates.•NiO nanoparticles enhance oxygen adsorption and dissociation.•Power density of 1.23 W cm−2 is measured at 700 °C.•The triple-conductive mechanism of PBFMN is investigated.•The dual effect in both perovskite phase and NiO nanoparticles promotes cathode.