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J. Korean Ceram. Soc. > Volume 52(5); 2015 > Article
Journal of the Korean Ceramic Society 2015;52(5): 304.
doi: https://doi.org/10.4191/kcers.2015.52.5.304
Suppressing Lateral Conduction Loss of Thin-film Cathode by Inserting a Denser Bridging Layer
Jung Hoon Park, Seung Hwan Lee, Hyoungchul Kim, Kyung Joong Yoon, Jong-Ho Lee, Seung Min Han1, Ji-Won Son
High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology
1Graduate School of EEWS, Korea Advanced Institute of Science and Technology
ABSTRACT
To reduce the lateral conduction loss of thin-film-processed cathodes, the microstructure of the thin-film cathode is engineered to contain a denser bridging layer in the middle. By doing so, the characteristic crack-like pores that separate the cathode domains in thin-film-processed cathodes and hamper lateral conduction are better connected and, as a result, the sheet resistance of the cathode is effectively reduced by a factor of 5. This induces suppression of the lateral conduction loss and expansion of the effective current collecting area; the cell performance is improved by more than 30%.
Key words: Solid oxide fuel cell, Thin-film cathode, Pulsed laser deposition, Current collection
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