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диффундируют в електролит, чем Zr из электролита в защитный слой. По сравнению с
окислительной средой (воздухом), в восстановительной (водородсодержащей) взаимная
диффузия элементов Ce, Gd и Zr более интенсивная, а глубина их проникновения больше
в 1,5–3 раза.
SUMMARY. The influence of reducing and oxidizing media on mutual diffusion of chemi-
cal elements between (Се, Gd)О 2–d barrier (protective) cathode layer and YSZ electrolyte of a
solid oxide fuel cell during annealing at a temperature of 1400°С was investigated. Using the
energy dispersive X-ray spectroscopy of the annealed specimens it was established that during
annealing in reducing medium, Ce and Gd were diffusing into the electrolyte more intensively
than Zr from the electrolyte into the protective layer. Mutual diffusion of Ce, Gd, and Zr was
more intensive in reducing (hydrogenous) medium and their penetration depth was 1.5–3 times
higher as compared with the oxidizing one (air).

Автори вдячні фонду DAAD (Deutscher Akademischer Austauschdienst) за фі-
нансову підтримку для виконання цієї роботи в Дослідному центрі Юліх (For-
schungszentrum Jűlich) у Німеччині.
1. Ferrite-based perovskites as cathode materials for anode-supported solid oxide fuel cells.
Part I. Variation of composition / A. Mai, V. Haanappel, S. Uhlenbruck, F. Tietz,
D. Stоеver // Solid State Ionics. – 2005. – 176. – P. 1341–1350.
2. Ferrite-based perovskites as cathode materials for anode-supported solid oxide fuel cells.
Part II. Influence of the CGO interlayer / A. Mai, V. Haanappel, F. Tietz, D. Stoever // Solid
State Ionics. – 2006. – 177. – P. 2103–2107.
3. Performance of LSCF cathodes in cell tests / F. Tietz, V. Haanappel, A. Mai, J. Mertens,
D. Stoever // J. Power Sources. – 2006. – 156. – P. 20–22.
4. Zhou X.-D., Scarfino B., and Anderson H. U. Electrical conductivity and stability of Gd-
doped ceria / Y-doped zirconia ceramics and thin films // Solid State Ionics. – 2004. – 175.
– P. 19–22.
5. Mitsuyasu H., Nonaka Y., and Eguchi K. Analysis of solid state reaction at the interface of
yttria-doped ceria/yttria-stabilized zirconia // Solid State Ionics. – 1998. – 113–115.
– P. 279–284.
6. Thermodynamic and kinetic considerations on degradations in solid oxide fuel cell cathodes
/ H. Yokokawa, N. Sakai, T. Horita, K. Yamai, M. E. Brito, H. Kishimoto // J. of Alloys and
Compounds. – 2008. – 452, № 1. – P. 41–47.
7. Kawada T. and Mizusaki J. Current electrolytes and catalyst / Eds. W. Vielstich, A. Lamm,
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– Chichester: J. Wiley and Sons, 2003. – P. 987–1001.
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