Electrophretic Deposition of LDC/LSGM/LDC Tri-layers on NiO-YSZ for Anode-supported SOFC

Abstract

  The SOFC cell composed of an LSGM solid electrolyte and LDC buffer layers was fabricated. The formation of the LDC/LSGM/LDC tri-layer on the NiO-YSZ substrate was performed by a sequential electrophoretic deposition (EPD) technique. The performance of the cells was evaluated at temperatures between 500 and 800 ℃ using H₂ and air as the fuel and oxidant, respectively. The cell's open circuit voltage (OCV) of about 0.8V is lower than 1.1V which is the theoretical OCV of the LSGM electrolyte. This suggests that the dense LDC layer may work as the electrolyte in place of the LSGM. It is considered that the microstructure of the LDC buffer layer should be controlled to improve the cell performance.