resumo
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.
palavras-chave
OXIDE FUEL-CELLS; MOLTEN-CARBONATE; ELECTRICAL-CONDUCTIVITY; CATHODE; STABILITY; NIO; POLARIZATION; PERFORMANCE; IMPROVEMENT; SOLUBILITY
categoria
Energy & Fuels; Nuclear Science & Technology
autores
Jamale, AP; Marques, FMB
nossos autores
Atul Prabhakar Jamale
Investigador Júnior
Fernando Manuel Bico Marques
Professor CatedráticoProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
Multi-Functional Nanocomposite Materials For Low-Temperature Ceramic Fuel Cells (NANOMFC )
agradecimentos
FEDER; FCT/MEC (PIDDAC), Grant/Award Numbers: FCT UID/CTM/50011/2013, M-ERA.NET2 2016-MOCO3-0009/2016 POCI-01-0145-FEDER-016654-PTDC/CTM-CER/6732/2014 and New-INDIGO/0001/2013