Abstract
In this study, we have successfully fabricated yttria-stabilized zirconia (YSZ) electrolyte thin films by aerosol-assisted chemical vapor deposition (AACVD) for solid oxide fuel cells (SOFCs) working at an intermediate temperature range under 600◦C. The mix ratio of precursor sources and the deposition temperature of the AACVD process are optimized to obtain target composition and crystal structure of the YSZ film. The optimized AACVD YSZ membrane is incorporated onto Ni-YSZ anodes supported without interlayers for evaluation of SOFC performance. Fully dense 1-μm-thick AACVD YSZ electrolyte successfully produces a stable open circuit voltage (OCV) greater than 1 V at all test temperatures in the range of 450–600◦C. Power output of the test cell is measured as about 600 mW cm−2 at 600◦C. Performance of our cell is compared to that of a reference cell with the same structure but with an 8-μm-thick membrane produced by screen-printing; our cell produces 1.4 to 4 times as much power as the reference cell at all test temperatures. Electrochemical impedance analysis has confirmed that the power enhancement with the thin AACVD YSZ membrane is due to effective reduction of both ohmic and polarization resistances.
Original language | English |
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Pages (from-to) | F484-F490 |
Journal | Journal of the Electrochemical Society |
Volume | 164 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2017 |
Bibliographical note
Funding Information:This work was supported by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20124010203250). This research was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2016R1A6A3A11934424). The Brain Korea 21 Plus program (No. 21A20131712520) and the Korea University Grant are also acknowledged for their partial support.
Publisher Copyright:
© 2017 The Electrochemical Society.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry