新型复合支撑体共烧制备致密La0.7Ca0.3Cr0.97O3−δ连接体薄膜

doi:10.3724/SP.J.1077.2012.11727

无机材料学报 ›› 2012, Vol. 27 ›› Issue (9): 911-916.DOI: 10.3724/SP.J.1077.2012.11727

新型复合支撑体共烧制备致密La_0.7Ca_0.3Cr_0.97O_3−δ连接体薄膜

王松林^1,2, 凤仪², 王东生¹, 孟广耀³

(1. 铜陵学院机械工程系, 铜陵 244061; 2. 合肥工业大学材料科学与工程学院, 合肥230009; 3. 中国科学技术大学材料科学与工程系, 合肥 230026)

收稿日期:2011-11-20 修回日期:2012-01-17 出版日期:2012-09-20 网络出版日期:2012-08-28
作者简介:王松林(1973-), 男, 博士, 讲师. E-mail: wsl-hf@126.com

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.

摘要/Abstract

摘要： 为了解决固体氧化物燃料电池(SOFC)陶瓷连接材料的低成本制备难题, 设计了与LaCrO3基连接材料和Ni基阳极均具有良好烧结匹配性能的新型复合材料NiO/ La0.7Ca0.3Cr0.97O3−δ (LCC97)作为管式SOFC的支撑体. 详细研究了NiO含量(5wt%、25wt%、50wt%、75wt%)对复合支撑体的烧结性能、微观组织、孔隙率、电导性能、热膨胀系数等的影响, 结果表明: LCC97与NiO具有优良的烧结和化学匹配性能, NiO/LCC97(1:1, wt%)具有最优的综合性能. 以其为支撑体, 采用浆料浸渍法制备LCC97湿膜, 1400℃空气条件下共烧, 获得了致密LCC97连接材料薄膜.

null

关键词: 铬酸镧, 连接材料, 共烧, 固体氧化物燃料电池

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.

Key words:

lanthanum chromite, interconnect, co-firing, SOFC

中图分类号:

TM911

王松林, 凤仪, 王东生, 孟广耀. 新型复合支撑体共烧制备致密La_0.7Ca_0.3Cr_0.97O_3−δ连接体薄膜[J]. 无机材料学报, 2012, 27(9): 911-916.

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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新型复合支撑体共烧制备致密La_0.7Ca_0.3Cr_0.97O_3−δ连接体薄膜

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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新型复合支撑体共烧制备致密La0.7Ca0.3Cr0.97O3−δ连接体薄膜

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新型复合支撑体共烧制备致密La_0.7Ca_0.3Cr_0.97O_3−δ连接体薄膜

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