Fabrication and characterization of anode support low-temperature solid oxide fuel cell based on the samaria-doped ceria electrolyte

摘要

In this paper anode support was fabricated by tape casting method using SDC-50 wt.% NiO slurry, then printed the Ce_(0.8)Sm_(0.2)O_(1.9) (SDC) electrolyte on the green piece which is cut out from the dried slurry piece. After at 90 ℃ drying for 14 h and co-sintered at 1350 ℃ for 10 h, get the φ70 mm anode support and electrolyte planar bilayer. Based on the observation of photos and scanning electron microscopy (SEM) indicated that bilayer owns the flat anode support substrate, and the highly dense, crack free electrolyte film which is 12 nm in thickness. Small disks which were cut out from the φ70 mm bilayer structure electro-chemically were examined in a single button-cell mode incorporating a SDC-60 wt.% La_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_3 composite cathode. The single cell was tested at 450 ℃~600 ℃, an open-circuit voltage (OCV) of 0.94 V and the maximum power density of 797 mV cm~(-2) achieved with dry hydrogen as fuel gas and air as oxidant gas at 600 ℃.