A new sol–gel precursor for preparation of La0.56Sr0.42Co0.2Fe0.8O3−δ film
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A new sol–gel route was proposed for the fabrication of micron-thick La0.56Sr0.42Co0.2Fe0.8O3−δ (LSCF) film on a yttria-stabilized zirconia (YSZ) substrate. A sol basis made from metal nitrates, ethylene glycol and adipic acid was modified with sugar and/or acetylacetone (ACAC). The suitable combination of ACAC and sugar guaranteed the formation of continuous film as well as remarkably improved film adhesion to the YSZ substrate. The better coverage of LSCF film on the YSZ substrate was further enhanced with the tuning of a spin speed and deposition repetition. The interfacial resistances are 0.41, 0.19 and 0.10 Ω cm2 at 700, 750 and 800 °C, respectively. These results suggest that the LSCF film should perform well as an interlayer between a YSZ substrate and adjacent porous LSCF layers.
KeywordsLSCF SOFC Sugar ACAC Spin coating Sol–gel
This work was supported by National Metal and Materials Technology Center (MT-B-52-END-07-067-I), the Science and Achievement Scholarship of Thailand (SAST), Thailand, the Nanotechnology Center (NANOTEC), NSTDA, Ministry of Science and Technology, Thailand, through its program of Center of Excellence Network, Center for Alternative Energy Research and Development, Khon Kaen University, Biosensing Technology for Sustainable Development Research Group, Khon Kaen University, the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission, through the Advance Functional Materials Cluster of Khon Kaen University, the Integrated Nanotechnology Research Center, Khon Kaen University.
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