Anode supported planar solid oxide fuel cells with the large size of 30 cm x 30 cm via tape-casting and co-sintering technique

In this work, the NiO-8YSZ/BYSZ half-cells for planar ASCs with the large size of 30 cm x 30 cm are prepared by optimizing both the sintering characteristics and the sintering temperature. The shrinkage rates, open porosities and flexural strength of the half cells are investigated systematically. The large size half-cells which are prepared by the tape-casting, co-sintering and two-step sintering method show the optimal comprehensive performances with the sintering temperature being 1350 degrees C. The NiO+8YSZ/8YSZ/LSM+8YSZ anode-supported single cells are obtained at the sintering temperature of 1050 degrees C. The maximum measurement power at output voltage of 0.8 V of the two cells and 1.6 V of the stack can reach 32.6 W, 34.7 W and 67.3 W, respectively. The two-cells stack is successively discharged under constant current of 5 A for 316 h with the degradation rate of 1.58% kh(-1) and 30 A for 1161 h with no degradation at the temperature of 750 degrees C. The large size ASCs show the good mechanical strength and an acceptable degradation. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.