Browse > Article

Redox Behaviors of NiO/YSZ Anode Tube in Anode-Supported Flat Tubular Solid Oxide Fuel Cells  

Song, Rak-Hyun (Advanced Fuel Cell Research Center, Hydrogen and Fuel Cells Research Department, Korea Institute of Energy Research)
Lee, Gil-Yong (Advanced Fuel Cell Research Center, Hydrogen and Fuel Cells Research Department, Korea Institute of Energy Research)
Shin, Dong-Ryul (Advanced Fuel Cell Research Center, Hydrogen and Fuel Cells Research Department, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.17, no.1, 2006 , pp. 82-89 More about this Journal
Abstract
The redox behaviors of anode-supported flat tube for solid oxide fuel cell has been studied. The mass change of the extruded NiO/YSZ anode flat tube during redox cycling was examined by thermogravimetric analysis(TGA). The result of TGA was shown a rapidly mass change in the range of $455\;-\;670^{\circ}C$ and the reoxidation of the NiO/YSZ anode was almost completed at $750^{\circ}C$. The starting temperature of reoxidation and the maximum temperature of oxidation rate decreased with increasing the reoxidation cycle, which is attributed to the increased porosity caused by volume change. Bending strengths of the NiO/YSZ anode after redox cycling were 96 - 80 MPa and the bending strength decreased slightly with increasing the redox cycle. On the other hand, the bending strength of the NiO/YSZ anode with electrolyte showed 130 MPa after first redox cycling but decreased rapidly with increasing the redox cycle. From the results of the bending test and the microstructure observation, we conclude that the crack initiation of the electrolyte-coated NiO/YSZ anode was induced easily at interface of electrolyte/anode tube and propagated cross the electrolyte.
Keywords
Reoxidation; Reduction; Anode-supported flat tube; TGA; mechanical strength; Solid Oxide Fuel Cell;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 K. Z. Fung, J. Chen, C. Tannner and A. A. Virkar, 'Low Temperature Solid Oxide Fuel Cells with Dip-Coated YSZ Electrolytes,' in proceedings of Fourth International Symposium on Solid Oxide Fuel Cells, edited by M.Dokiya, O.Yamamoto, H. Tagawa and S. C. Singhal (The Electrochemical society, Inc. Pennington, NJ), 1995, pp. 1018-1027
2 D. Simwoni, G. Stathis, F. Tietz, R. W. Wteinbrech and A. Naoumidis, 'Oxidation and Resulting Mechanical Properties of Ni/8YSZ Anode Substrate for SOFC,' in Proceedings of Third European Solid Oxide Fuel Cell Forum, edited by P. Stevens (European Fuel Cell Forum, Oberrohrdorf, Switzerland), 1998, pp. 219-228
3 J. Malzbender, E. Wessel and R. W. Steinbrech, 'Reduction and re-oxidation of anodes for Solid Oxide Fuel Cells', Solid State Ionics, accepted for publication (2005) Fuel Cells, vol. IX, 2005, pp. 1244-1256
4 N. M. Sammes and Y. Du, 'The Mechanical Properties of Tubular Solid Oxide Fuel Cells', J. Mater. Sci., vol. 38, 2003, pp. 4811-4816   DOI   ScienceOn
5 N. Q. Minh and T. Takahashi, 'Science and Technology of Ceramic Fuel Cells', Elsevier, Amsterdam, 1995, pp. 165-191
6 Rak-Hyun Song, Dong-Ryul Shin, EungYoung Kim, Harumi Yokokawa, 'Fuel ElectrodeSupported Tubular Solid Oxide Fuel Cell and Method of Manufacturing The Same,' U.S. Patent 6,436,565 B1, Aug. 20, 2002
7 D. Waldbillig, A. Wood and D. Ivey, 'Enhancing the Redox Tolerance of Anode supported Solid Oxide Fuel Cells by Microstructural Modification', in: S. C. Singhal, J. Mizusaki(Eds.), The Electrochemical Society Proceedings Series, Proc. Solid Oxide Fuel Cells, vol. IX, 2005, pp. 1244-1256
8 송락현, 신동열, 김응용, Harumi Yokokawa, '연료극 지지체식 원통형 고체산화물 연료전지 및 그 제소 방법,' 한국특허 등록 제 0344936호, 2002년 7월 3일
9 J. H. Kim and R. H Song, 'Characteristics of Anode-supported Flat Tubular Solid Oxide Fuel Cell', J. Korean Electrochem. Soc., vol. 7, No. 2, 2004, pp. 94-99   DOI
10 K. S. Lee, D. W. Seo, J.H. Yu and S. K Woo, 'A Study on the Improvement of Strength in NiO- YSZ Porous Anode Material for Solid Oxide Fuel Cell'. J. Kor. Ceram. Soc., vol. 40, No. 3, 2003, pp. 241-248   DOI
11 J. Malzbender, E. Wessel, R. W. Steinbrech, 'Reduction and Re-oxidation of Anodes for Solid Oxide Fuel Cells,' Solid State Ionics, vol. 176, 2005, pp. 2201-2203   DOI   ScienceOn
12 S. C. Singhal and K. Kendall, 'High Temperature Solid Oxide Fuel Cells' Elsevier, Kidlington, 2003, pp. 173-180
13 R. H. Song, E. Y. Kim, D. R. Shin and H. Yokokawa, 'Fabrication and Characteristics of Anode-Supported Tube for Solid Oxide Fuel Cell,' Proc. 6th Intern. Sym. Solid Oxide Fuel Cells, The Electrochemical Society, October 17-22, 1999, pp. 845-850
14 S. P. Jiang and S. H. Chan, 'A review of anode materials development in solid oxide fuel cells', J. Mater. Sci. 39 4405-4439, 2004   DOI   ScienceOn