Microstructure and Electrical Conductivity of Atmospheric Plasma Sprayed LSM-YSZ Composite Cathode Coating
Yttria stabilized zirconia and lanthanum strontium manganate (YSZ/LSM) have been employed to fabricate the composite cathode functional layer for solid oxide fuel cells (SOFCs). In the present study, the YSZ/LSM composite coating was deposited by atmospheric plasma spray (APS). The electrical conductivity of the composite coating was measured by the means of Direct Current (DC) measurement in a temperature range of 500-900 ℃. The electrical conductivity of YSZ- 50％LSM coating changed from 2.17 S/cm to 3.60 S/cm along the direction parallel to the coating surface at the temperature range. For the same specimen, the electrical conductivity in the perpendicular direction is less than one-tenth of that in the parallel direction. The anisotropy of the electrical conductivity is attributed to the phases of different properties in the composite coating and the APS coating structure characteristics. The activation energy of the composite coating at both directions was calculated. The results showed that the electrical conduction of the composite was strongly influenced by the YSZ content.
C. Zhang W.-Y. Li H. Liao C. Coddet C.-J. Li C.-X. Li
LERMPS, Université de Technologie de Belfort-Montbéliard, Site de Sévenans, Belfort, France;State Ke LERMPS, Université de Technologie de Belfort-Montbéliard, Site de Sévenans, Belfort, France State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian, Shaanxi
国际会议
北京
英文
2007-05-14（万方平台首次上网日期，不代表论文的发表时间）