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

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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.

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Acknowledgment

This work was financially supported partially by the WCU project through National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (R31-2008-000-10075-0) and partially by the Seoul R&D Program (CS070157).

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Authors and Affiliations

  1. WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Korea

    Han-Ill Yoo, Tae-Hyun Kwon & Taewon Lee

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  1. Han-Ill Yoo
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  2. Tae-Hyun Kwon
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  3. Taewon Lee
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Correspondence to Han-Ill Yoo.

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Yoo, HI., Kwon, TH. & Lee, T. On the steady-state chemical potential profiles in bilayer solid electrolytes. Journal of Materials Research 27, 1969–1974 (2012). https://doi.org/10.1557/jmr.2012.201

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