The thinning strategy
is effective to develop high-performance
solid oxide fuel cells (SOFCs) that can operate at low temperatures.
The inkjet printing, which enables precise thin-film production in
a simple and cost-effective manner, can have an important role in
the implementation of the thin-film SOFC technology. In this study,
a method to manufacture the entire SOFC using a low-cost commercial
inkjet printer is proposed. All the developed ceramic inks exhibited
long-term dispersion stabilities and fluid properties suitable for
inkjet printing. An inkjet-printed submicron-thick yttria-stabilized
zirconia electrolyte maintained a high open-circuit voltage and robust
uniform microstructure during electrochemical performance measurements.
A fully inkjet-printed SOFC with a submicron-thick electrolyte achieved
a high-power output of 730 mW cm–2 at 650 °C
and significantly low degradation rate of 0.0002 V h–1 even in the durability test. These results indicate that inkjet
printing could be successfully introduced to manufacture thin-film-based
SOFC stacks.
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