CHENG Liang ¹ ,LUO Linghong ¹ ,SHI Jijun ¹ ,WANG Chengcheng ¹,HUANG Zuzhi ¹ ,ALFRED TOK²

(1.Jingdezhen Ceramic Institute, Jingdezhen 333001; 2. School of Material Science and Engineering, Nanyang Technology

University, Singapore)

Abstract: Fabrication of planar anode -supported electrolyte layers has been developed by aqueous tape casting and co -sintering processes for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Graphite and PVP powders were used as pore former and a surfactant, respectively. At pH > 9.6, the high-quality green tapes of both the anode and electrolyte layers were prepared by adding 0.8wt% of the dispersant (PAA). The addition of PVP could prevent carbon powder separating from the matrix and promote homogeneous distribution of carbon powder in the anode slurries. The sintering shrinkage match between the anode and the electrolyte could be achieved by adjusting mass ratio of the fine YSZ to coarse YSZ in the NiO/YSZ anode. The flat and large-size anode-supported electrolyte structure has been successfully fabricated with the anode layer being 0.5~1.0 mm thick above 30vol% porosity, ~15um thickness and above 98% relative density for the electrolyte layer.

Keywords: aqueous tape casting, co-firing, anode layer, electrolyte layer