Chemical diffusion in perovskite cathodes of solid oxide fuel cells: the Sr doped LaMn1−xMxO3 (MCo, Fe) systems
Source abstract
Abstract
Abstract This paper reports the results of chemical diffusion coefficient measurements for oxygen in (La,Sr)(Mn,Co)O 3 and (La,Sr)(Mn,Fe)O 3 using a manometric method in the temperature range of 773 to 1023 K. It was observed that the addition of Fe or Co into (La 4 x Sr x ) 1− y MnO 3 results in a substantial increase of the chemical diffusion coefficient. In the range 25–100 mol% of Co or Fe substitution at B-site in (La,Sr)MnO 3 , the chemical diffusion coefficient exhibits much lower activation energy than that in (La,Sr)MnO 3 . The chemical diffusion data in (La,Sr)(Mn,Co)O 3 and (La,Sr)(Mn,Fe)O 3 system determined by the manometric method are generally in agreement with those determined by electrochemical relaxation methods reported in the literature. A comparison of the chemical diffusion data indicates that the oxygen mobility is lowest in (La,Sr)MnO 3 and highest in (La,Sr)CoO 3 .
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
Show source-provided references
1. Badwal · Mater. Forum · 1997 · 21 · 183
2. Matsumoto · J. Electroanal. Chem. · 1980 · 127 · 236010.1149/1.2129415 ↗
3. Tracer diffusion coefficient of oxide ions in LaCoO3 single crystals10.1016/0022-4596(84)90136-1 ↗
4. Oxygen permeation studies of SrCo0.8Fe0.2O3−δ10.1016/0167-2738(94)00296-5 ↗
5. Determination of the chemical diffusion coefficient of SrFeCo0.5Ox by the conductivity relaxation method10.1016/0167-2738(95)00227-8 ↗
6. Oxygen exchange and diffusion coefficient of strontium-doped lanthanum ferrites by electrical conductivity relaxation10.1149/1.1837531 ↗
7. Chemical diffusion coefficient and oxygen exchange of La0.6Sr0.4C00.6Fe0.4O3−δ10.1016/S0167-2738(97)00263-4 ↗
8. S. Guggilla, A. Manthiram. Crystal chemical characterisation of the mixed conductor Sr(Fe,Co)1.5Oy exhibiting unusually high oxygen permeability. J. Electrochem. Soc. 144 (1997) L120–L125.10.1149/1.1837631 ↗
9. J. Nowotny, M. Rekas. J. Am. Ceram. Soc. 81(1998).10.1111/j.1151-2916.1998.tb02297.x ↗
10. T. Bak, J. Nowotny, M. Rekas, C.C. Sorrell, J. Phys. Chem. Solids, in press.
11. I. Yasuda, K. Ogasawara, M. Hishinuma, T. Kawada, M. Dokiya, Solid State Ionics 86–88 (1996) 1197–1201.10.1016/0167-2738(96)00287-1 ↗
12. B.C.H. Steele, S. Carter, Kajda, I. Kontoulis, J.A. Kilner, in: F. Grosz, P. Zeglers, C.C. Singhal, O. Yamamoto (Eds), Proc. 2nd Int. Symp. on SOFC, 1991, pp. 517–525.
13. Carter · Solid State Ionics · 1992 · 53–56 · 59710.1016/0167-2738(92)90435-R ↗
14. J. Wolfenstine, T.R. Armstrong, W.J. Weber, M.A. Bloing-Risser, K.C. Goretta, J.L. Routbord, J. Mater. Res. 11 (1996) 657.10.1557/JMR.1996.0079 ↗
15. van Heuveln · J. Electrochem. Soc. · 1997 · 144 · 12610.1149/1.1837374 ↗
16. Badwal · J. Austral. Ceram. Soc. · 1998 · 34 · 154
17. Betzner · Solid State Ionics · 1992 · 57 · 32710.1016/0167-2738(92)90166-M ↗
18. Price · Z. Physik. Chem., Neue Folge · 1966 · 49 · 25710.1524/zpch.1966.49.3_5.257 ↗
19. O.F. Kononchuk, D.P. Sutija, T. Norby, P. Kofstad, in: S.C. Singhal (Ed.), Proc. 4th Int. Symp. on SOFC, The Electrochemical Society, Pennington, NJ, 1995, pp. 395–403.10.1149/199501.0395PV ↗
20. Lankhorst · J. Electrochem. Soc. · 1997 · 144 · 126110.1149/1.1837580 ↗
21. Adamczyk · J. Phys. Chem. Solids · 1986 · 47 · 1110.1016/0022-3697(86)90171-X ↗