DOI QR코드

DOI QR Code

Effect of Nickel Addition on Sintering Behavior and Electrical Conductivity of BaCe0.35Zr0.5Y0.15O3-δ

  • An, Hyegsoon (High-temperature Energy Materials Research Center, Korea Institute of Science and Technology) ;
  • Shin, Dongwook (Department of Fuel Cells and Hydrogen Technology, Hanyang University) ;
  • Ji, Ho-Il (High-temperature Energy Materials Research Center, Korea Institute of Science and Technology)
  • Received : 2018.11.12
  • Accepted : 2018.11.16
  • Published : 2019.01.31

Abstract

The effect of different Ni-containing additives on the sintering behavior and electric conductivity of the proton conducting electrolyte $BaCe_{0.35}Zr_{0.5}Y_{0.15}O_{3-{\delta}}$ (BCZY5) was investigated. Ni-doped, NiO-added, and $BaY_2NiO_5$(BYN)-added (all 4 mol%) BCZY5 samples were prepared by the solid state synthesis method and sintered at $1400^{\circ}C$ for 6 h. Among the three samples, the onset of densification was observed at the lowest temperature for NiO-added BCZY5, which is attributed to the formation of an intermediate phase at a low melting temperature. The BYN-added sample, where no consumption of the constitutional elements of the electrolyte was expected during sintering, exhibited the highest electrical conductivity whereas the doped sample had the lowest conductivity. The electrical conductivities at $500^{\circ}C$ under humid argon atmosphere were measured to be 2.0, 4.8, and $6.2mS{\cdot}cm^{-1}$ for Ni-doped and NiO- and BYN-added samples, respectively.

Keywords

Proton conducting electrolyte;Sintering aid;BCZY;Conductivity;PCFC

Acknowledgement

Supported by : National Research Foundation of Korea

References

  1. E. D. Wachsman and K. T. Lee, "Lowering the Temperature of Solid Oxide Fuel Cells," Science, 334 [6058] 935-39 (2011). https://doi.org/10.1126/science.1204090
  2. K. D. Kreuer, "Proton-Conducting Oxides," Annu. Rev. Mater. Res., 33 333-59 (2003). https://doi.org/10.1146/annurev.matsci.33.022802.091825
  3. K. Katahira, Y. Kohchi, T. Shimura, and H. Iwahara, "Protonic Conduction in Zr-substituted $BaCeO_3$," Solid State Ionics, 138 [1-2] 91-8 (2000). https://doi.org/10.1016/S0167-2738(00)00777-3
  4. P. Babilo, T. Uda, and S. M. Haile, "Processing of Yttrium-Doped Barium Zirconate for High Proton Conductivity," J. Mater. Res., 22 [5] 1322-30 (2007). https://doi.org/10.1557/jmr.2007.0163
  5. Z. M. Zhong, "Stability and Conductivity Study of the $BaCe_{0.9-x}Zr_{x}Y_{0.1}O_{2.95}$ Systems," Solid State Ionics, 178 [3-4] 213-20 (2007). https://doi.org/10.1016/j.ssi.2006.12.007
  6. Y. Yamazaki, R. Hernandez-Sanchez, and S. M. Haile, "High Total Proton Conductivity in Large-Grained Yttrium-Doped Barium Zirconate," Chem. Mater., 21 [13] 2755-62 (2009). https://doi.org/10.1021/cm900208w
  7. H. Wang, R. R. Peng, X. F. Wu, J. L. Hu, and C. R. Xia, "Sintering Behavior and Conductivity Study of Yttrium- Doped $BaCeO_3-BaZrO_3$ Solid Solutions Using ZnO Additives," J. Am. Ceram. Soc., 92 [11] 2623-29 (2009). https://doi.org/10.1111/j.1551-2916.2009.03204.x
  8. Y. Liu, Y. M. Guo, R. Ran, and Z. P. Shao, "A Novel Approach for Substantially Improving the Sinterability of $BaZr_{0.4}Ce_{0.4}Y_{0.2}O_{3-{\delta}}$ Electrolyte for Fuel Cells by Impregnating the Green Membrane with Zinc Nitrate as a Sintering Aid," J. Membr. Sci., 437 189-95 (2013). https://doi.org/10.1016/j.memsci.2013.03.002
  9. J. H. Tong, D. Clark, L. Bernau, M. Sanders, and R. O'Hayre, "Solid-State Reactive Sintering Mechanism for Large-Grained Yttrium-Doped Barium Zirconate Proton Conducting Ceramics," J. Mater. Chem., 20 [30] 6333-41 (2010). https://doi.org/10.1039/c0jm00381f
  10. C. C. Duan, R. J. Kee, H. Y. Zhu, C. Karakaya, Y. C. Chen, S. Ricote, A. Jarry, E. J. Crumlin, D. Hook, R. Braun, N. P. Sullivan, and R. O'Hayre, "Highly Durable, Coking and Sulfur Tolerant, Fuel-Flexible Protonic Ceramic Fuel Cells," Nature, 557 217-22 (2018). https://doi.org/10.1038/s41586-018-0082-6
  11. D. Han, K. Shinoda, S. Tsukimoto, H. Takeuchi, C. Hiraiwa, M. Majima, and T. Uda, "Origins of Structural and Electrochemical Influence on Y-doped $BaZrO_3$ Heat-Treated with NiO Additive," J. Mater. Chem. A, 2 [31] 12552-60 (2014). https://doi.org/10.1039/C4TA01689K
  12. H. An, D. Shin, S. M Choi, J. H. Lee, J. W. Son, B. K. Kim, H. J. Je, H. W. Lee, and K. J. Yoon, "$BaCeO_3-BaZrO_3$ Solid Solution (BCZY) as a High Performance Electrolyte of Protonic Ceramic Fuel Cells (PCFCs)," J. Korean Ceram. Soc., 51 [4] 271-77 (2014). https://doi.org/10.4191/kcers.2014.51.4.271
  13. Y. Yoo and N. Lim, "Performance and Stability of Proton Conducting Solid Oxide Fuel Cells based on Yttriumdoped Barium Cerate-Zirconate Thin-Film Electrolyte," J. Power Sources, 229 48-57 (2013). https://doi.org/10.1016/j.jpowsour.2012.11.094
  14. D. Buttrey, J. Sullivan, and A. Rheingold, "Phase Equilibrium Study of the Y-Ba-$NiO_5$ System and Structural Characterization of the New Quasi-One-Dimensional Oxide $Y_2BaNiO_5$," J. Solid State Chem., 88 291-302 (1990). https://doi.org/10.1016/0022-4596(90)90226-N
  15. Y. M. Guo, R. Ran, and Z. P. Shao, "Optimizing the Modification Method of Zinc-Enhanced Sintering of $BaZr_{(0.4)}Ce_{(0.4)}Y_{(0.2)}O_{(3-{\delta})}$-based Electrolytes for Application in an Anode-Supported Protonic Solid Oxide Fuel Cell," Int. J. Hydrogen Energy, 35 [11] 5611-20 (2010). https://doi.org/10.1016/j.ijhydene.2010.03.039
  16. S. Ricote and N. Bonanos, "Enhanced Sintering and Conductivity Study of Cobalt or Nickel Doped Solid Solution of Barium Cerate and Zirconate," Solid State Ionics, 181 [15-16] 694-700 (2010). https://doi.org/10.1016/j.ssi.2010.04.007
  17. N. Nasani, D. Ramasamy, I. Antunes, B. Singh, and D. P. Fagg, "Structural and Electrical Properties of Strontium Substituted $Y_2BaNiO_5$," J Alloys Compd., 620 91-6 (2015). https://doi.org/10.1016/j.jallcom.2014.09.127