Preparation,thermal expansion,chemical compatibility,electrical conductivity and polarization of A2−αA′αMO4 (A = Pr,Sm; A′ = Sr; M = Mn,Ni; α = 0.3, 0.6) as a new cathode for SOFC |
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| Affiliation: | 1. Chair of Physical Chemistry, Montanuniversitaet Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria;2. Institute for Electron Microscopy and Nanoanalysis (FELMI), Graz University of Technology & Graz Center for Electron Microscopy (ZFE), Austrian Cooperative Research (ACR), Steyrergasse 17, 8010 Graz, Austria;1. Chair of Physical Chemistry, Montanuniversitaet Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria;2. Institute for Electron Microscopy and Nanoanalysis (FELMI), University of Technology & Graz Centre for Electron Microscopy (ZFE), Steyrergasse 17, 8010 Graz, Austria;1. FEMTO-ST Institute (UMR CNRS 6174), Université de Bourgogne Franche-Comté, UTBM, 2 place Lucien Tharradin, F-25200 Montbéliard, France;2. FR FCLab 3539, 90000 Belfort, France;3. ICB (UMR CNRS 6303), Université de Bourgogne Franche-Comté, UTBM, 90400 Sevenans, France;4. ICMCB-CNRS, 87 Av. du Dr. A. Schweitzer, 33608 Pessac Cedex, France;5. CIRIMAT Université de Toulouse, CNRS, INPT, UPS, ENSIACET, 4 allée E. Monso, 31030 Toulouse, France |
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| Abstract: | A2−αA′αMO4 (A = Pr, Sm, A′ = Sr, M = Ni, Mn) with K2NiF4-type structure were synthesized by solid reaction. Their chemical stability, electrical conductivity and thermal expansion behavior as well as cathodic polarization were investigated in relation to the cathode of SOFC. The results showed that A2−αA′αMO4 exhibited a low reactivity with yttria stabilized zirconia (YSZ) electrolyte. The thermal expansion coefficient (TEC) values were changed with the ionic radius of A. The specific conductivities of the nickelates were higher than those of manganites. While the nickelates showed a lower cathodic polarization in comparison with manganites. |
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