DOI QR코드

DOI QR Code

Synthesis of Ni-YSZ cermets for SOFC by glycine nitrate process

Glycine nitrate process에 의한 SOFC용 Ni-YSZ cermets 제조

  • Lee, Tae-Suk (Department of Materials Engineering, Korea Maritime University) ;
  • Ko, Jung-Hoon (Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University) ;
  • Kim, Bok-Hee (Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University)
  • 이태석 (한국해양대학교 재료공학과) ;
  • 고정훈 (전북대학교 수소염료전지 특성화대학원) ;
  • 김복희 (전북대학교 수소염료전지 특성화대학원)
  • Received : 2010.10.21
  • Accepted : 2010.12.10
  • Published : 2010.12.31

Abstract

Ni-YSZ (Yttria Stabilized Zirconia) composite powders for SOFC were fabricated by glycine nitrate process. $ZrO(NO_3)_2{\cdot}2H_2O$, $Y(NO_3)_3{\cdot}6H_2O$, $Ni(NO_3)_2{\cdot}6H_2O$ and glycine were chosen as the starting materials. The structural properties of the sintered Ni-YSZ cermets have been investigated with respect to the volume contents of Ni. A porous microstructure consisting of homogeneously distributed Ni and YSZ phases together with well-connected grains was observed. The sintered Ni-YSZ cermets showed a porous microstructure consists of homogeneously distributed Ni and YSZ phases and the grains were well-connected. It was found that the open porosity is sensitive to the volume content of Ni. The Ni-YSZ cermet containing 35 vol% Ni seems to be suitable for the electrode material of SOFC since it provides sufficient open porosity higher than 30%.

SOFC용 Ni-YSZ(Yttria Stabilized Zirconia) composite powders를 glycine nitrate process를 이용하여 만들었다. $ZrO(NO_3)_2{\cdot}2H_2O$, $Y(NO_3)_3{\cdot}6H_2O$, $Ni(NO_3)_2{\cdot}6H_2O$와 glycine을 출발원료로 하였으며 Ni의 부피비를 변화시켜 각기 그들의 소결 및 환원 특성을 알아보았다. Ni과 YSZ 상들이 상호 연결된 균질하게 분포된 다공성 미세구조를 관찰 할 수 있었으며 Ni의 첨가량에 따라 가공률이 민감하게 변화함을 알 수 있었다. 35 vol% 이상의 Ni를 함유한 Ni-YSZ cermet가 SOFC용 전극재료로 사용되는데 필요한 30% 이상의 공극을 갖는 조성임을 알 수 있었다.

Keywords

References

  1. N.Q. Minh and T. Takahashi, "Science and technology of ceramic fuel cells, Elsevier", New York (1995).
  2. R.M. C. Clemmer and S.F. Corbin, "Influence of porous composite microstructure on the processing and properties of solid oxide fuel cell anodes", Solid State Ionics 166 (2004) 251. https://doi.org/10.1016/j.ssi.2003.12.009
  3. K. Eguchi, Y. Kunisa, K. Adachi, M. Kayano, Kayano, K. Sekizawa and H. Arai, "An effect of anodic reaction on the current-voltage characteristics of solid oxide fuel cells", Chemistry Letters (1995) 963.
  4. S. Primdahl and M. Mogensen, "$(La_{0.75}Sr_{0.25})(Cr_{0.25}Mn_{0.5})O_3/YSZ$ composite anodes for methane oxidation reaction in solid oxide fuel cells", J. Electrochem. Soc. 146 (1999) 2827. https://doi.org/10.1149/1.1392015
  5. Y. Yin, W. Zhu, C. Xia and G. Meng, "Fabrication and performance of impregnated Ni anodes of solid oxide fuel cells", J. Power Sources 132 (2004) 36. https://doi.org/10.1016/j.jpowsour.2004.01.017
  6. N.Q. Minh, "Ceramic fuel cells", J. Am. Ceram. Soc. 76 (1993) 563. https://doi.org/10.1111/j.1151-2916.1993.tb03645.x
  7. D.S. McLachlan, M. Blaszkiewicz and R.E. Newnham, "Electrical resistivity of composites", J. Am. Ceram. Soc. 73 (1990) 2187. https://doi.org/10.1111/j.1151-2916.1990.tb07576.x
  8. G. Matula, T. Jardiel, R. Jimenz and A. Varez, "Microstructure, mechanical and electrical properties of Ni- YSZ anode supported solid oxide fuel cells", Archives of Materials Sci. & Eng. 32 (2008) 21.
  9. S.T. Aruna, M. Muthuraman and K.C. Patil, "Synthesis and properties of Ni-YSZ cermet: anode material for solid oxide fuel cells", Solid State Ionics 111 (1998) 45. https://doi.org/10.1016/S0167-2738(98)00187-8
  10. A.C. Mller, B. Pei, A. Weber and E. Ivers-Tiffe, "Properties of Ni/YSZ cermets depending on their microstructure", HTMC IUPAC (2000) 1.

Cited by

  1. Characterization of Ni-YSZ cermet anode for SOFC prepared by glycine nitrate process vol.21, pp.1, 2011, https://doi.org/10.6111/JKCGCT.2011.21.1.021
  2. ceramics vol.21, pp.2, 2011, https://doi.org/10.6111/JKCGCT.2011.21.2.070