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