INVESTIGADORES
BAQUE Laura Cecilia
congresos y reuniones científicas
Título:
Characterization of Cathode/Electrolyte Interphases for IT-SOFCs
Autor/es:
LAURA BAQUÉ; K. PADMASREE; A. F. FUENTES; ADRIANA SERQUIS; ANALÍA SOLDATI
Reunión:
Congreso; XIV International Congress of the Mexican Hydrogen Society; 2014
Institución organizadora:
Sociedad Mexicana del Hidrógeno
Resumen:
Solid oxide fuel cells (SOFCs) represent an
efficient and environmental friendly technology for obtaining electrical power
and heat. In recent years, a
considerable research effort has been done in order to decrease their operation
temperature from 800-1000ºC to the 500-800ºC range. However, the main drawback of lowering SOFC
operating temperature is the reduction of cell performance and, hence, each
individual component and their interfaces must be optimized. In this work, we
studied symmetrical cells composed by high performance nanostructured La0.4Sr0.6Co0.8Fe0.2O3
(LSCFO) cathodes deposited by spin coating on Ce0.8Y0.2O2
(CYO) substrates. CYO electrolytes were
synthesized by mechanical milling using two different milling times. Longer
milling time produces electrolytes with smaller grain sizes, narrow size
distribution and higher density. Bulk conductivity values are similar for both
electrolytes, while grain boundary conductivity was slightly higher for the
electrolyte prepared with shorter milling time. All this indicates that longer
milling time does not improve electrolyte conductivity but, instead, it can
have a detrimental effect.