Nanoengineering of cathode layers for solid oxide fuel cells to achieve superior power densities

Katherine Develos-Bagarinao (), Tomohiro Ishiyama, Haruo Kishimoto, Hiroyuki Shimada and Katsuhiko Yamaji
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Katherine Develos-Bagarinao: National Institute of Advanced Industrial Science and Technology (AIST)
Tomohiro Ishiyama: National Institute of Advanced Industrial Science and Technology (AIST)
Haruo Kishimoto: National Institute of Advanced Industrial Science and Technology (AIST)
Hiroyuki Shimada: National Institute of Advanced Industrial Science and Technology (AIST)
Katsuhiko Yamaji: National Institute of Advanced Industrial Science and Technology (AIST)

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: Abstract Solid oxide fuel cells (SOFCs) are power-generating devices with high efficiencies and considered as promising alternatives to mitigate energy and environmental issues associated with fossil fuel technologies. Nanoengineering of electrodes utilized for SOFCs has emerged as a versatile tool for significantly enhancing the electrochemical performance but needs to overcome issues for integration into practical cells suitable for widespread application. Here, we report an innovative concept for high-performance thin-film cathodes comprising nanoporous La0.6Sr0.4CoO3−δ cathodes in conjunction with highly ordered, self-assembled nanocomposite La0.6Sr0.4Co0.2Fe0.8O3−δ (lanthanum strontium cobalt ferrite) and Ce0.9Gd0.1O2−δ (gadolinia-doped ceria) cathode layers prepared using pulsed laser deposition. Integration of the nanoengineered cathode layers into conventional anode-supported cells enabled the achievement of high current densities at 0.7 V reaching ~2.2 and ~4.7 A/cm2 at 650 °C and 700 °C, respectively. This result demonstrates that tuning material properties through an effective nanoengineering approach could significantly boost the electrochemical performance of cathodes for development of next-generation SOFCs with high power output.

Date: 2021
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DOI: 10.1038/s41467-021-24255-w

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