Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 43, Issue -, Pages 108-115Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2019.08.010
Keywords
Reversible solid oxide electrochemical cell; Double perovskite; Composite electrode; Stability; Reversibility
Funding
- National Key Research & Development Project [2016YFE0126900]
- National Natural Science Foundation of China [51672095]
- Hubei Province [2018AAA057]
- EPSRC Capital for Great Technologies [EP/L017008/1]
- China Scholarship Council [201806160178]
- EPSRC [EP/L017008/1] Funding Source: UKRI
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In this study, we successfully synthesized double perovskite-type oxide NdBa0.5Ca0.5Co1.5Fe0.5O5+delta (NBCCF) using a conventional wet chemical method as the oxygen electrode for reversible solid oxide electrochemical cells (RSOCs). The polarization resistance (R-p) of the composite electrode NBCCF-Gd0.1Ce0.9O2 (GDC) is only 0.079 Omega cm(2) at 800 degrees C under air. The single cell based on NBCCF-GDC electrode displays a peak power density of 0.941 W/cm(2) in fuel cell mode and a low R-p value of 0.134 Omega cm(2). In electrolysis cell mode, the cell displays an outstanding oxygen evolution reaction (OER) activity and shows current density as high as 0.92 A/cm(2) with 50 vol% AH (Absolute Humidity) at 800 degrees C and applied voltage of 1.3 V. Most importantly, the cell exhibits admirable durability of 60 h both in electrolysis mode and fuel cell mode with distinguished reversibility. All these results suggest that NBCCF is a promising candidate electrode for RSOC. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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