resumo
Continuing previous reviews on mixed-conducting electrodes for intermediate-temperature solid oxide fuel cells (IT SOFCs), this work presents a short overview of novel cathode and anode materials, their electrochemical performance in contact with oxygen anion- and proton-conducting solid electrolytes, and specific features determining possible applications. Priority was given mainly to recent research reports published during the last 2-5 years. Particular emphasis is focused on the relevant methodological aspects, potential limitations and drawbacks, and factors affecting electrode polarization and durability. Typical ranges of the polarization resistances, overpotentials, power densities in the cells with various current collectors, and the electrode materials total conductivity and thermal expansion are compared. The electrode compositions appraised in single-chamber and micro-SOFCs, hydrocarbon- and carbon-fueled cells, high-temperature electrolyzers, and other solid-electrolyte appliances are briefly covered in light of their similarity to the common SOFC materials discussed in the previous parts.
palavras-chave
SINGLE-CHAMBER SOFC; HIGH-TEMPERATURE ELECTROLYSIS; HIGH-POWER-DENSITY; LANTHANUM-GALLATE ELECTROLYTE; YTTRIA-STABILIZED ZIRCONIA; HYDROCARBON-AIR MIXTURES; DIRECT CARBON CONVERSION; DOPED CERIA ELECTROLYTE; OXYGEN-ION CONDUCTORS; SULFUR-TOLERANT ANODE
categoria
Electrochemistry
autores
Tsipis, EV; Kharton, VV
nossos autores
Vladislav Kharton
Investigador Principal CovidadoGrupos