Different ceria-based materials Gd0.1Ce0.9O2-δ and Sm0.075Nd0.075Ce0.8O2-δ for ceria-bismuth bilayer electrolyte high performance low temperature solid oxide fuel cells

Two types of ceria-bismuth bilayer films Gd0.1Ce0.9O2-delta vertical bar Er0.4Bi1.6O3 (GDC vertical bar ESB) and Sm0.075Nd0.075Ce0.85O2-delta vertical bar ESB (SNDC vertical bar ESB) assembled with ESB-La0.74Bi0.1Sr0.16MnO3-delta (ESB-LBSM) cathode are evaluated based on anode supported single cells, in order to compare and investigate the influence of different ceria-based materials GDC and SNDC with different ionic conductivity on the performance of the ceria-bismuth bilayer electrolyte films for high performance low temperature solid oxide fuel cells (HPLT-SOFCs). The single cell with GDC vertical bar ESB bilayer film outputs the maximum power density (MPD) of 895 mW cm(-2) with interfacial polarization resistance (Rp) of 0.079 Omega cm(2) at 650 degrees C. When SNDC is used, which has a much higher ionic conductivity with respect to GDC, the cell with SNDC vertical bar ESB bilayer film achieves the MPD of 930 mW cm(-2) and the Rp of 0.035 Omega cm(2) at the same conditions which shows better electrochemical performance. Furthermore, the SNDC vertical bar ESB bilayer film cell shows higher power output in the entire operation temperature range compared with GDC vertical bar ESB-based cell and has the MPD of 271 mW cm(-2) at 500 degrees C which demonstrate the superiority of SNDC vertical bar ESB bilayer structure cell in LT-SOFC operations. (C) 2015 Elsevier B.V. All rights reserved.