Efficient and controlled nano-catalyst solid-oxide fuel cell electrode infiltration with poly-norepinephrine surface modification

JOURNAL OF POWER SOURCES

卷:485

Article

Ozmen, O.^1,2  Lee, S.^1,3  Hackett, G.¹  Abernathy, H.^1,3  Zondlo, J. W.²  Sabolsky, E. M.^1,2 

[1] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA

[2] West Virginia Univ, Morgantown, WV 26506 USA

[3] Leidos Res Support Team LRST, Morgantown, WV 26507 USA

关键词: Infiltration;    Bio-surfactant;    Nano-catalyst;    SOFC;   

DOI  :  10.1016/j.jpowsour.2020.229232

来源: Elsevier

【 摘 要 】

There is a growing attention to enhance the performance of solid oxide fuel cell (SOFC) electrodes through the incorporation of nano-catalyst materials within the electrodes' active sites. In this study, we report a technique for increased efficiency and microstructural control of the nano-catalyst infiltration process through polymerized norepinephrine (pNE) treatment. Nano-CeO2 catalysts were incorporated within both electrodes of commercial anode-supported SOFCs using a single salt solution step after a coating of pNE within the porous microstructure. The optimization of catalyst loading was performed by varying the cerium nitrate solution concentrations between 0.4 and 2.0 M. The ceria nanoparticles are distributed at the near-electrolyte region in both electrodes, but with microstructural variance due to the precursor molarity and solid loading. The time-dependent polarization resistance (R-p) variation was categorized into three zones by the nano-catalyst loading. Zone I referred to the baseline performance for the low-catalyst loading and fluctuating R-p. However, the cells in Zone II and III showed a continuous time-dependent activation as low as 0.275 Omega cm(2) at 750 degrees C. The results suggest that the nano-CeO2 film reduces coarsening and related degradation of the backbone. In addition, the pNE-assisted dip infiltration enhanced infiltrant deposition efficiency by reducing the number of infiltration steps.

【 授权许可】

Free