Suppressing Lateral Conduction Loss of Thin-film Cathode by Inserting a Denser Bridging Layer

  • Park, Jung Hoon ;
  • Lee, Seung Hwan ;
  • Kim, Hyoungchul ;
  • Yoon, Kyung Joong ;
  • Lee, Jong-Ho ;
  • Han, Seung Min ;
  • Son, Ji-Won
  • Received : 2015.07.09
  • Accepted : 2015.08.12
  • Published : 2015.09.30


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%.


Solid oxide fuel cell;Thin-film cathode;Pulsed laser deposition;Current collection


  1. A. Ignatiev, X. Chen, N. Wu, Z. Lu, and L. Smith, "Nanostructured Thin Solid Oxide Fuel Cells with High Power Density," Dalton Trans., [40] 5501-6 (2008).
  2. S. J. Litzelman, J. L. Hertz, W. Jung, and H. L. Tuller, "Opportunities and Challenges in Materials Development for Thin Film Solid Oxide Fuel Cells," Fuel Cells, 8 [5] 294- 302 (2008).
  3. E. D. Wachsman and K. T. Lee, "Lowering the Temperature of Solid Oxide Fuel Cells," Science, 334 [6058] 935-39 (2011).
  4. A. Bieberle-Hutter, D. Beckel, A. Infortuna, U. P. Muecke, J. L. M. Rupp, L. J. Gauckler, S. Rey-Mermet, P. Muralt, N. R. Bieri, N. Hotz, M. J. Stutz, D. Poulikakos, P. Heeb, P. Muller, A. Bernard, R. Gmur, and T. Hocker, "A Micro-solid Oxide Fuel Cell System as Battery Replacement," J. Power Sources, 177 [1] 123-30 (2008).
  5. D. Kennouche, J. Hong, H.-S. Noh, J.-W. Son, and S. A. Barnett, "Three-dimensional Microstructure of High-performance Pulsed-laser Deposited Ni-YSZ SOFC Anodes," Phys. Chem. Chem. Phys., 16 [29] 15249-55 (2014).
  6. C. Peters, A. Weber, and E. Ivers-Tiffee, "Nanoscaled $(La_{0.5}Sr_{0.5})CoO_{3−{\delta}}$ Thin Film Cathodes for SOFC Application at $500^{\circ}C$ < T < $700^{\circ}C$," J. Electrochem. Soc., 155 [7] B730-37 (2008).
  7. H.-S. Noh, J.-W. Son, H. Lee, H.-S. Song, H.-W. Lee, and J.- H. Lee, "Low Temperature Performance Improvement of SOFC with Thin Film Electrolyte and Electrodes Fabricated by Pulsed Laser Deposition," J. Electrochem. Soc., 156 [12] B1484-90 (2009).
  8. P. Plonczak, M. Sogaard, A. Bieberle-Hütter, P. V. Hendriksen, and L. J. Gauckler, "Electrochemical Characterization of $La_{0.58}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-{\delta}}$ Thin Film Electrodes Prepared by Pulsed Laser Deposition," J. Electrochem. Soc., 159 [5] B471-82 (2012).
  9. H.-S. Noh, J.-W. Son, H. Lee, H.-R. Kim, J.-H. Lee, and H.- W. Lee, "Thin Film $(La_{0.7}Sr_{0.3})_{0.95}MnO_{3-d}$ Fabricated by Pulsed Laser Deposition and its Application as Solid Oxide Fuel Cell Cathode for Low Temperature Operation," J. Korean Ceram. Soc., 47 [1] 75-81 (2010).
  10. D.-H. Myung, J. Hong, J. Hwang, J.-H. Lee, H.-W. Lee, B.- K. Kim, S. G. Cho, and J.-W. Son, "Performance of Solid Oxide Fuel Cell with Gradient-structured Thin-film Cathode Composed of Pulsed-laser-deposited Lanthanum Strontium Manganite-Yttria-stabilized Zirconia Composite," J. Korean Ceram. Soc., 48 [6] 487-92 (2011).
  11. H.-S. Noh, H. Lee, H.-I. Ji, H.-W. Lee, J.-H. Lee, and J.-W. Son, "Limitation of Thickness Increment of Lanthanum Strontium Cobaltite Cathode Fabricated by Pulsed Laser Deposition," J. Electrochem. Soc., 158 [1] B1-4 (2011).
  12. H.-S. Noh, J. Hwang, K. Yoon, B.-K. Kim, H.-W. Lee, J.-H. Lee, and J.-W. Son, "Optimization of Current Collection to Reduce the Lateral Conduction Loss of Thin-film-processed Cathodes," J. Power Sources, 230 109-14 (2013).
  13. H. S. Noh, J. W. Son, H. Lee, J. S. Park, H. W. Lee, and J. H. Lee, "Direct Applicability of $La_{0.6}Sr_{0.4}CoO_{3-{\delta}}$ Thin Film Cathode to Yttria Stabilised Zirconia Electrolytes at $T{\leq}650^{\circ}C$," Fuel Cells, 10 [6] 1057-65 (2010).