Mixed ionic-electronic YSZ/Ni composite for SOFC anodes with high electrical conductivity
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Journal of the Electrochemical Society
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The preparation of the ZrO2:8 mol % Y2O3/NiO (YSZ/NiO) composites by a modified liquid mixture technique is reported.
Nanometric NiO particles dispersed over the yttria-stabilized zirconia (YSZ) were prepared, resulting in dense sintered specimens
with no solid solution formation between the oxides. Such a feature allowed for the electrical characterization of the composites
in a wide range of relative volume fraction, temperature, and oxygen partial pressure. The main results indicate that the composites
have high electrical conductivity, and the transport properties in these mixed ionic-electronic (MIEC) composites are strongly
dependent on the relative volume fraction of the phases, microstructure, and temperature. These parameters should hence be taken
into consideration for the optimized design of MIEC composites for electrochemical applications. In this context, the composite
was reduced under H2 for the preparation of high-conductivity YSZ/Ni cermets for use as solid oxide fuel cell anode material with
relatively low metal content.
Como referenciar
FONSECA, FABIO C.; FLORIO, DANIEL Z. de; ESPOSITO, VICENZO; TRAVERSA, ENRICO; MUCCILLO, ELIANA N. dos S.; MUCCILLO, REGINALDO. Mixed ionic-electronic YSZ/Ni composite for SOFC anodes with high electrical conductivity. Journal of the Electrochemical Society, v. 153, n. 2, p. A354-A360, 2006. DOI: 10.1149/1.2149312. Disponível em: http://repositorio.ipen.br/handle/123456789/5320. Acesso em: 30 Dec 2025.
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