Fabrication of Dense La0.7Ca0.3Cr0.97O3−δ Interconnect Membrane on Novel SOFC Composite Support by Co-firing

doi:10.3724/SP.J.1077.2012.11727

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (9): 911-916.DOI: 10.3724/SP.J.1077.2012.11727

• Research Paper • Previous Articles Next Articles

Fabrication of Dense La_0.7Ca_0.3Cr_0.97O₃_−δ Interconnect Membrane on Novel SOFC Composite Support by Co-firing

WANG Song-Lin^1,2, FENG Yi², WANG Dong-Sheng¹, MENG Guang-Yao³

(1. Department of Mechanical Engineering, Tongling University, Tongling 244061, China; 2. Department of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; 3. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China)

Received:2011-11-20 Revised:2012-01-17 Published:2012-09-20 Online:2012-08-28
About author:WANG Song-Lin.

Abstract

Abstract: Developing cost-effective methods to prepare dense ceramic interconnect membrane for tubular solid oxide fuel cell (SOFC) stacks is currently considered as a major technical obstacle. In order to improve the co-firing compatibility of SOFC support with both LaCrO₃-based interconnects and Ni-based anodes, double-phase composite NiO/La_0.7Ca_0.3Cr_0.97O₃_−δ(LCC97) was designed and then examined as novel SOFC support. Sintering character, microstructure, porosity, electrical conductivity and thermal expansion coefficient of the NiO/LCC97 composites were investigated in detail as a function of NiO content (5wt%, 25wt%, 50wt% and 75wt%). Results indicate that the interconnect material LCC97has desirable chemical and sintering compatibility with NiO. The NiO/LCC97 composite with weight ratio of 1:1 has excellent overall performance which can sufficiently meet the requirements for tubular SOFC support. By using a simple and cost-effective drop-coating/co-firing process, dense LCC97 interconnect thin membrane is successfully prepared on the novel NiO/LCC97(1:1) composite support. This work provides a simple technical solution for dense LaCrO₃-based interconnect fabrication for tubular SOFC stacks.

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Key words:

lanthanum chromite, interconnect, co-firing, SOFC

CLC Number:

TM911

WANG Song-Lin, FENG Yi, WANG Dong-Sheng, MENG Guang-Yao. Fabrication of Dense La_0.7Ca_0.3Cr_0.97O₃_−δ Interconnect Membrane on Novel SOFC Composite Support by Co-firing[J]. Journal of Inorganic Materials, 2012, 27(9): 911-916.

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Fabrication of Dense La_0.7Ca_0.3Cr_0.97O₃_−δ Interconnect Membrane on Novel SOFC Composite Support by Co-firing

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