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/La0.7Ca0.3Cr0.97O3δ(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.
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/La0.7Ca0.3Cr0.97O3-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 LCC97 has 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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第9期911-916,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(21171131)
安徽省自然科学基金(1208085QE84)~~
