Development of LSCF cathode perovskites for solid oxide fuel cell
DOI:
https://doi.org/10.24191/mjcet.v5i2.14979Keywords:
Lanthanum Strontium Cobalt Ferrite, Solid Oxide Fuel Cell, Cathode, Mixed Ionic Electronic, ConductivityAbstract
Solid oxide fuel cell (SOFC) is a technology that converts chemical energy to electrical energy which is used to generate powers such as turbines. The cathode in SOFC is developed with the material consisting of lanthanum strontium cobalt ferrite (LSCF) with good mixed ionic electronic conductivity (MIEC) properties. The LSCF pellet is prepared by an annealing temperature in a furnace within the temperature of 600 to 900 ℃. With these temperatures, it is crucial to investigate the annealing temperature effect of the LSCF crystalline structure, morphological studies, and its electrical conductivity. The pellet contains LSCF undergoes X-ray diffraction (XRD) for crystalline structure and electrical impedance spectroscopy (EIS) for electrical performances and conductivity. The crystalline structure tested with XRD shows a similar diffraction peak even with the increasing temperature of annealing. As the annealing temperature gets higher, the main peak becomes smoother. As for the lowest annealing temperature of 600 ℃, the diffraction peaks seem unstable compared to 700 ℃ and above. This suggests that LSCF has a stability of structure at a high operating temperature of SOFC. The electrical impedance of the fabricated LSCF pellet is at the lowest annealing temperature of 600 ℃ with a value of 0.00554 Ω·cm. By the objective to lower the operating temperature of SOFC, the LSCF produces a small impedance and electrical conductivity. Also, the LSCF compound has the best structure stability at a high temperature above 700 ℃.
References
Akbari-Fakhrabadi, A., Sathishkumar, P., Ramam, K., Palma, R., & Mangalaraja, R.V. (2015). Low frequency ultrasound assisted synthesis of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite nanostructures. Powder Technology, 276, 200–203. https://doi.org/10.1016/j.powtec.2015.02.043
Asadi, A.A., Behrouzifar, A., Iravaninia, M., Mohammadi, T., & Pak, A. (2012). Preparation and oxygen permeation of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite-type membranes: Experimental study and mathematical modelling. Industrial & Engineering Chemistry Research, 51, 3069–3080. https://doi.org/10.1021/ie202434k
Choi, J.-J., Qin, W., Liu, M., & Liu, M. (2011). Preparation and characterization of (La0.8Sr0.2)0.95MnO3−δ (LSM) thin films and LSM/LSCF interface for solid oxide fuel cells. Journal of the American Ceramic Society, 94(10), 3340–3345. https://doi.org/10.1111/j.1551-2916.2011.04614.x
Han, G. D., Choi, H. J., Bae, K., Choi, H. R., Jang, D. Y., & Shim, J. H. (2017). Fabrication of lanthanum strontium cobalt ferrite–gadolinium-doped ceria composite cathodes using a low-price inkjet printer. ACS Applied Materials & Interfaces, 9(45), 39347–39356. https://doi.org/10.1021/acsami.7b11462
Lassman, A. M. (2011). Evaluation of Cathode Materials For Low Temperature (500–700 ℃) Solid Oxide Fuel Cells (Issues 196) [Master’s Thesis, University of Connecticut]. https://opencommons.uconn.edu/gs_theses/196
Letilly, M., Joubert, O., & Le Gal La Salle, A. (2012). Characterisation and optimisation of the cathode/electrolyte couple for SOFC LSCF/BIT07. Journal of Power Sources, 212, 161–168. https://doi.org/10.1016/j.jpowsour.2012.03.042
Lubini, M., Chinarro, E., Moreno, B., de Sousa, V. C., Alves, A.K., & Bergmann, C. P. (2016). Electrical properties of La0.6Sr0.4Co1–yFeyO3 (y = 0.2–1.0) fibers obtained by electrospinning. Journal of Physical Chemistry C, 120(1), 64–69. https://doi.org/10.1021/acs.jpcc.5b09696.s001
Marinha, D., Dessemond, L., Cronin, J. S., Wilson, J. R., Barnett, S. A., & Djurado, E. (2011). Microstructural 3D reconstruction and performance evaluation of LSCF cathodes obtained by electrostatic spray deposition. Chemistry of Materials, 23(24), 5340–5348. https://doi.org/ 10.1021/CM2016998
Rembelski, D., Viricelle, J.P., Combemale, L. & Rieu, M. (2012). Characterization and comparison of different cathode materials for SC-SOFC: LSM, BSCF, SSC, and LSCF. Fuel Cells, 12(2), 256–264. https://doi.org/10.1002/fuce.201100064
Singhal, S.C. (2007), Solid Oxide Fuel Cells. The Electrochemical Society Interface, 16(4), 41–44. https://doi.org/10.1149/2.f06074if
Venezia, E., Viviani, M., Presto, S., Kumar, V., Tomov, R.I. (2019). Inkjet printing functionalization of SOFC LSCF cCathodes. Nanomaterials (Basel), 9(4), 654. https://doi.org/10.3390/nano9040654
Xin, X., Zhu, Q., & Liu, Y. (2019). Conductive protective coating with heat oxygen-resistance for solid oxide fuel cell (SOFC) alloy interconnect. Surface Technology, 48, 22–29. 10.16490/j.cnki.issn.1001-3660.2019.01.003
Yu, Y., Ludwig, K. F., Woicik, J. C., Gopalan, S., Pal, U. B., Kaspar, T. C., & Basu, S. N. (2016). Effect of Sr content and strain on Sr surface segregation of La1–xSrxCo0.2Fe0.8O3−δ as cathode material for solid oxide fuel cells. ACS Applied Materials & Interfaces, 8(40), 26704–26711. https://doi.org/10.1021/acsami.6b07118
Downloads
Published
Issue
Section
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
