Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-26T11:14:40.738Z Has data issue: false hasContentIssue false
  • English
  • Français

On the steady-state chemical potential profiles in bilayer solid electrolytes

Published online by Cambridge University Press:  05 July 2012

Han-Ill Yoo ,
Tae-Hyun Kwon  and
Taewon Lee
Han-Ill Yoo*
Affiliation:
WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
Tae-Hyun Kwon
Affiliation:
WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
Taewon Lee
Affiliation:
WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

All the existing theories presuppose the continuity of oxygen chemical potential at interfaces between contiguous layers, in calculating steady-state chemical potential profiles across a multilayer composite of mixed conductor oxides that is subjected to an oxygen chemical potential gradient of whatsoever origin, but they have never been tested experimentally. We have observed that this continuity hypothesis appears to break down in yttria-stabilized zirconia/gadolinia-doped ceria bilayer electrolytes under an electric tension in ion-blocking condition (Hebb–Wagner polarization). It is suggested that all the continuity hypothesis-based existing theories to calculate the steady-state chemical potential distributions may not always be true depending on boundary conditions.

Keywords

Bilayer YSZ/GDC electrolytesChemical potential distributionElectronic conductivity
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 15: Focus Issue: Advanced Materials for Fuel Cells , 14 August 2012 , pp. 1969 - 1974
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Choudhury, N.S. and Patterson, J.W.: Steady-state chemical potential profiles in solid electrolytes. J. Electrochem. Soc. 117, 1348 (1970).CrossRefGoogle Scholar
2.Virkar, A.V.: Theoretical analysis of solid oxide fuel cells with two-layer, composite electrolytes: Electrolyte stability. J. Electrochem. Soc. 138, 1481 (1991).CrossRefGoogle Scholar
3.Marques, F.M.B. and Navarro, L.M.: Performance of double layer electrolyte cells Part I: Model behavior. Solid State Ionics 90, 183 (1996).CrossRefGoogle Scholar
4.Yuan, S. and Pal, U.: Analytic solution for charge transport and chemical-potential variation in single-layer and multilayer devices of different mixed-conducting oxides. J. Electrochem. Soc. 143, 3214 (1996).CrossRefGoogle Scholar
5.Wachsman, E.D., Jayaweera, P., Jiang, N., Lowe, D.M., and Pound, B.G.: Stable high conductivity ceria/bismuth oxide bilayered electrolytes. J. Electrochem. Soc. 144, 233 (1997).CrossRefGoogle Scholar
6.Chan, S.H., Chen, J.J., and Khor, K.A.: A simple bilayer electrolyte model for solid oxide fuel cells. Solid State Ionics 158, 29 (2003).CrossRefGoogle Scholar
7.Singh, R. and Jacob, K.T.: Calculation of the oxygen potential profile across solid-state electrochemical cells. J. Appl. Electrochem. 33, 571 (2003).CrossRefGoogle Scholar
8.Jacobsen, T. and Mogensen, M.: The course of oxygen partial pressure and electric potentials across an oxide electrolyte cell. ECS Trans. 13, 259 (2008).CrossRefGoogle Scholar
9.Wagner, C.: On the electromotive force of the cell: Ag|AgI|Ag2S|Pt(+S). Z. Elektrochem. Angew. Phys. Chem. 40, 364 (1934).Google Scholar
10.Kwon, T-H., Lee, T., and Yoo, H-I.: Partial electronic conductivity and electrolytic domain of bilayer electrolyte Zr0.84Y0.16O1.92/Ce 0.9Gd0.1O1.95. Solid State Ionics 195, 25 (2011).CrossRefGoogle Scholar
11.Park, J-H. and Blumenthal, R.N.: Electronic transport in 8 mol percent Y2O3-ZrO2. J. Electrochem. Soc. 136, 2867 (1989).CrossRefGoogle Scholar
12.Park, S-H.: Tailoring of electrolytic domain of ceria-based electrolytes with electron traps. Ph.D. Thesis, Seoul National University, Seoul, Korea, 2008.Google Scholar
13.Lee, K-R., Lee, J-H., and Yoo, H-I.: Reassessment of conventional polarization technique to measure partial electronic conductivity of electrolytes. Solid State Ionics 181, 724 (2010).CrossRefGoogle Scholar
14.Schmalzried, H.: Chemical Kinetics of Solids (VCH, Weinheim, Germany, 1995); pp. 221–222.CrossRefGoogle Scholar
15.Yoo, H-I. and Lee, K-C.: Microstructural changes in a polycrystalline, semiconducting oxide under DC electric fields. J. Electrochem. Soc. 145, 4243 (1998).CrossRefGoogle Scholar
16.Yokokawa, H.: Private discussion.Google Scholar