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Application of GDC-YDB bilayer and LSM-YDB cathode for intermediate temperature solid oxide fuel cells

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Abstract

Yttria-doped bismuth (YDB) and gadolinia-doped ceria (GDC) are investigated as a bilayer electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs). LSM-YDB is used as a cathode material in order to improve the poor ionic conduction of LSM and the compatibility with the YDB electrolyte. The performance of the bilayer cell was measured under humidified H2 (3 % H2O) atmosphere and an operating temperature between 500 °C and 650 °C. The polarization resistance and ohmic resistance of the GDC-YDB bilayer cell were 0.189 Ωcm2 and 0.227 Ωcm2 at 650 °C, respectively. The bilayer cell showed 0.527 Wcm−2 in the maximum power density at 650 °C, which is about two times higher than the single-layer cell of 0.21 Wcm−2. The OCV of the bilayer cell was 0.89 V at 650 °C, suggesting that the electronic conduction caused by the reduction of ceria was successfully suppressed by the YDB layer. The introduction of an YDB-GDC bilayer cell with LSM-YDB cathode thus appears to be a promising method for improving the performance of GDC-based SOFCs and reducing operating temperature.

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Acknowledgments

This work was supported by the New & Renewable Energy (No. 20093021030021) and the Human Resources Development (No. 20104010100500) under the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean Ministry of Knowledge Economy.

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Authors and Affiliations

  1. Department of Chemical and Bio-molecular Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Republic of Korea

    Jin Goo Lee, Myung Geun Park & Yong Gun Shul

  2. Department of Chemical Engineering, Gachon University, Seongnam, Gyunggi-do, 461-701, Korea

    Hyon Hee Yoon

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  1. Jin Goo Lee
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  2. Myung Geun Park
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Correspondence to Yong Gun Shul.

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Lee, J.G., Park, M.G., Yoon, H.H. et al. Application of GDC-YDB bilayer and LSM-YDB cathode for intermediate temperature solid oxide fuel cells. J Electroceram 31, 231–237 (2013). https://doi.org/10.1007/s10832-013-9796-x

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  • DOI: https://doi.org/10.1007/s10832-013-9796-x

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