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- Title
DEVELOPMENT OF COBALT-FREE OXIDE (SM<sub>0.5</sub>SR<sub><sub>0.5</sub></sub>FE<sub>0.8</sub>CR0.2O<sub>3-δ</sub>) CATHODE FOR INTERMEDIATETEMPERATURE SOLID OXIDE FUEL CELLS (IT-SOFCS).
- Authors
Susanto, Iwan; Kamal, Dianta Mustofa; Ruswanto, Sidiq; Subarkah, Rahmat; Zainuri, Fuad; Permana, Sulaksana; Soedarsono, Johny Wahyuadi; Subardi, Adi; Fu, Yen-Pei
- Abstract
A cobalt-free perovskite oxide Sm0.5Sr0.5Fe0.8Cr0.2O3-δ (SSFC) has been exploited as a novel cathode for intermediate- temperature solid oxide fuel cells (IT-SOFCs). The cathode model was synthesized with the addition of the chromium element in the B side of the composite metallic oxide system, which was then formed by the solid-state reaction method. The model system was further characterized in detail for getting the properties behavior. The solid- state reaction of the SSFC system was observed through thermal gravimetric analysis. Meanwhile, the structural properties were investigated by x-ray diffraction, and the weight loss was examined by the thermal gravimetric analysis as well. Furthermore, the thermal expansion coefficient was determined by the thermal-mechanical analysis, and the conductivity properties were tested by the thermal conductivity analysis. The result showed that the SSFC cathode demonstrated the crystalline structure based on the design with a perovskite phase. The oxygen content created on the model structure was obtained to be 2.98 after the calcination process. The average thermal expansion coefficient was achieved up to 5.0×10-6 K-1 as the heating given up to 800 °С. Moreover, the conductivity value reached from 2 S∙cm-1 at 400 °С and it increased to be a maximum of 7.5 S∙cm-1 at 700 °С. In addition, the presence of Cr6+ cation valence coordinated with the oxygen anion could lead to generating a large concentration of oxygen vacancies on the cathode surface, facilitating the transport of the O2− anion in the cathode system. Based on these results, the SSFC cathode has good properties as a composite system promising for IT-SOFCs application in the future
- Subjects
SOLID oxide fuel cells; THERMOGRAVIMETRY; CATHODES; METALLIC oxides; METALLIC composites; THERMAL expansion
- Publication
Eastern-European Journal of Enterprise Technologies, 2020, Vol 108, Issue 5, p15
- ISSN
1729-3774
- Publication type
Article
- DOI
10.15587/1729-4061.2020.217282