This title appears in the Scientific Report :
2000
Please use the identifier:
http://dx.doi.org/10.1016/S0167-2738(00)00477-X in citations.
Total electrical conductivity and defect structure of ZrO2-CeO2-Y2O3-Gd2O3 solid solutions
Total electrical conductivity and defect structure of ZrO2-CeO2-Y2O3-Gd2O3 solid solutions
The use of a bilayer composite YSZ-CGO (yttria-stabilized zirconia-gadolinia-doped ceria) electrolyte for intermediate-temperature solid-oxide fuel cells (SOFCs) is still problematic, due to solid-state reaction and interdiffusion phenomena occurring between YSZ and CGO. To overcome this problem, a...
Saved in:
Personal Name(s): | Tsoga, A. |
---|---|
Naoumidis, A. / Stöver, D. | |
Contributing Institute: |
Institut für Werkstoffe und Verfahren der Energietechnik; IWV |
Published in: | Solid state ionics, 135 (2000) S. 403 - 409 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2000
|
Physical Description: |
403 - 409 |
DOI: |
10.1016/S0167-2738(00)00477-X |
Document Type: |
Journal Article |
Research Program: |
Solid Oxide Fuel Cell Werkstoff- und Bauteilentwicklung für die Hochtemperatur-Brennstoffzelle |
Series Title: |
Solid State Ionics
135 |
Subject (ZB): | |
Publikationsportal JuSER |
The use of a bilayer composite YSZ-CGO (yttria-stabilized zirconia-gadolinia-doped ceria) electrolyte for intermediate-temperature solid-oxide fuel cells (SOFCs) is still problematic, due to solid-state reaction and interdiffusion phenomena occurring between YSZ and CGO. To overcome this problem, a gradation in the microstructure between the single materials is proposed. To optimize the composition of the interlayer with respect to conductivity, different compositions of the system CGO(x)YSZ(1-x) were prepared and characterized in order to study their transport properties. Conductivity was found to reach a minimum for solid solutions where Zr and Ce are present in equimolar quantities. The latter are, however, the most appropriate candidates to be applied as interlayers between the two single materials. Keeping the Ce/Zr atomic ratio approximately equal to one, different solid solutions were prepared and characterized by varying the concentration of the trivalent cations present, in order to clarify their role in the transport properties of the material. For one of the better conducting systems the cell performance of the composite YSZ-interlayer-CGO film electrolyte is simulated and compared to that of the YSZ-CGO film electrolyte. (C) 2000 Elsevier Science B.V. All rights reserved. |