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Screening of electrode materials and cell concepts for composite ceria + salt electrolytes
Author(s) -
Jamale Atul P.,
Marques Fernando M.B.
Publication year - 2018
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4236
Subject(s) - electrolyte , dielectric spectroscopy , electrode , materials science , chemical engineering , scanning electron microscope , oxide , electrochemistry , composite number , layer (electronics) , non blocking i/o , analytical chemistry (journal) , nanotechnology , composite material , chemistry , metallurgy , chromatography , catalysis , engineering , biochemistry
Summary The optimization of the performance of electrodes (oxide‐based) for composite electrolytes (Ce 0.9 Gd 0.1 O 1.95 + (Li 0.52 Na 0.48 ) 2 CO 3 ) is addressed in this work acting mostly on the electrode chemical nature (eg, LaCoO 3 , Li 0.43 NiO 2 , or LiNiO 2 ), 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. LaCoO 3 electrodes deposited on the electrolyte using an intermediate barrier layer showed a promising area specific resistance of 0.22 Ω.cm 2 at 600°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°C, where lithiated NiO showed the best stability.