Screening of electrode materials and cell concepts for composite ceria plus salt electrolytes
authors Jamale, AP; Marques, FMB
nationality International
journal INTERNATIONAL JOURNAL OF ENERGY RESEARCH
author keywords ceria; composite electrolyte; electrode; intermediate temperature fuel cells; molten carbonates
keywords OXIDE FUEL-CELLS; MOLTEN-CARBONATE; ELECTRICAL-CONDUCTIVITY; CATHODE; STABILITY; NIO; POLARIZATION; PERFORMANCE; IMPROVEMENT; SOLUBILITY
abstract The optimization of the performance of electrodes (oxide-based) for composite electrolytes (Ce0.9Gd0.1O1.95 + (Li0.52Na0.48)(2)CO3) is addressed in this work acting mostly on the electrode chemical nature (eg, LaCoO3, Li0.43NiO2, or LiNiO2), thickness (single and multiple screen-printed layers), and cell layer concept (with/without barrier layers between electrode and electrolyte). The cell performance and stability were analyzed by electrochemical impedance spectroscopy, X-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy. LaCoO3 electrodes deposited on the electrolyte using an intermediate barrier layer showed a promising area specific resistance of 0.22 Omega.cm(2) at 600 degrees C. This optimized cell processing route was adopted as reference to study the endurance performance of distinct electrode materials up to 100 hours in air, at 550 degrees C, where lithiated NiO showed the best stability.
publisher WILEY
issn 0363-907X
year published 2018
volume 42
issue 15
beginning page 4805
ending page 4816
digital object identifier (doi) 10.1002/er.4236
web of science category Energy & Fuels; Nuclear Science & Technology
subject category Energy & Fuels; Nuclear Science & Technology
unique article identifier WOS:000449519500023
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