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

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.

SUBMITTER: Develos-Bagarinao K 

PROVIDER: S-EPMC8233395 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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

Develos-Bagarinao Katherine K   Ishiyama Tomohiro T   Kishimoto Haruo H   Shimada Hiroyuki H   Yamaji Katsuhiko K  

Nature communications 20210625 1

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  ...[more]

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