Anode Supported Tubular Cell Fabrication and Large Scale Cell Development

摘要

The use of an anode supported design for solid oxide fuel cells(SOFCs) allows the thickness of the electrolyte layer to be reduced to below 20μm, reducing the ohmic losses in the electrolyte layer and allowing the operation at the intermediate temperature range of 700 ～ 800°C. The cells were composed of multiple layers (8YSZ electrolyte, Ni/8YSZ anode, and LaSrMn cathode) and electrolyte buffer layers(LSM perovskite), placed on between electrolyte and cathode layers. The anode was extruded or pressed (cold isostatic pressing) and fired to 1250°C followed by vacuum infiltration of the electrolyte slurry and firing at 1450°C. The cathode layer was fired at 1200°C. Engineering problems with manufacturing of anode tubes, sealing cells and in the hot furnace and current collection and measurement were solved. Manufacturing processes were made to improve the performance of the cells. Based on these results, we are continuing further studies of the large scale cell component design and manufacturing for higher efficiency, long term durability of the cells, and finally for the large scale SOFC stack technology.