Solid oxide fuel cells (SOFC) are the cleanest, most efficient, and cost-effective option for direct conversion to electricity of a wide variety of fuels. While significant progress has been made in anode materials with enhanced tolerance to coking and contaminant poisoning, cathodic polarization still contributes considerably to energy loss, more so at lower operating temperatures. Here we report a synergistic effect of co-doping in a cation-ordered double-perovskite material, PrBa 0.5 Sr 0.5 Co 2-x Fe x O 5+δ, which has created pore channels that dramatically enhance oxygen ion diffusion and surface oxygen exchange while maintaining excellent compatibility and stability under operating conditions. Test cells based on these cathode materials demonstrate peak power densities ∼2.2â€...W cm -2 at 600 C, representing an important step toward commercially viable SOFC technologies.
|Original language||English (US)|
|State||Published - 2013|
Bibliographical noteKAUST Repository Item: Exported on 2021-09-21
Acknowledgements: This research was supported by WCU (World Class University) program (R31-2009-000-20012-0) and Mid-career Researcher Program (2011-0010773) through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology and the New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant (20113020030060) funded by the Korea government Ministry of Knowledge Economy. DFT calculations were performed at the National Energy Research Scientific Computing Center (Contract No. DE-AC02-05CH11231) and KAUST Supercomputing Laboratory.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
ASJC Scopus subject areas