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Enhanced interface reactivity by a nanowrinkled functional layer for intermediate-temperature solid oxide fuel cells

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Abstract

For high-performance intermediate-temperature solid oxide fuel cells (IT-SOFCs), rational design of the interface between the electrode and electrolyte is essential, because interfacial reactivity often dominates the overall performance. In this study, a unique nanowrinkled structure of a Gd0.1Ce0.9O1.95 functional layer is fabricated by electrostatic spray deposition (ESD) between a porous nanostructured electrode and dense electrolyte, for extended and activated reaction sites at the interfaces. Upon the introduction of the nanowrinkled functional layer, the polarization resistance is reduced 3.3-fold, while the peak power density is increased 2.2-fold (0.034 Ω cm2 and 1.19 W cm−2, respectively) at 650 °C, compared to those of the reference sample. The substantial increases in surface area and grain boundary density in the nanowrinkled functional layer reduce both polarization resistance and activation energy, providing a significant performance enhancement. Our results demonstrate the importance of interface engineering with a cost-effective and simple ESD process to fully utilize the nanostructured electrodes for high-performance IT-SOFCs.

Graphical abstract: Enhanced interface reactivity by a nanowrinkled functional layer for intermediate-temperature solid oxide fuel cells

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Publication details

The article was received on 08 May 2019, accepted on 01 Aug 2019 and first published on 02 Aug 2019


Article type: Paper
DOI: 10.1039/C9TA04818A
J. Mater. Chem. A, 2019, Advance Article

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    Enhanced interface reactivity by a nanowrinkled functional layer for intermediate-temperature solid oxide fuel cells

    J. Lee, S. Hwang, M. Ahn, M. Choi, S. Han, D. Byun and W. Lee, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA04818A

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