Screening of electrode materials and cell concepts for composite ceria + salt electrolytes. (15th October 2018)

• Record Type: Journal Article
• Authors: Jamale, Atul P.; Marques, Fernando M.B.
• Is Part Of: International journal of energy research. Volume 42:Number 15(2018)
• Page Start: 4805
• Page End: 4816
• Publication Date: 2018-10-15
• Subjects: ceria -- composite electrolyte -- electrode -- intermediate temperature fuel cells -- molten carbonates; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.4236
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: The optimization of the performance of electrodes (oxide‐based) for composite electrolytes (Ce0.9 Gd0.1 O1.95 + (Li0.52 Na0.48 )2 CO3 ) is addressed in this work acting mostly on the electrode chemical nature (eg, LaCoO3, Li0.43 NiO2, 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 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. Abstract : Multiple electrode materials tested with composite electrolytes Distinct cell configurations and electrode thickness Functional barrier layer between electrode and electrolyte Endurance tests of deposited electrodes