High-performance anode-supported solid oxide fuel cells with co-fired Sm_(0.2)Ce_(0.8)O_(2-δ)/ La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.2)O_(3-δ)/Sm_(0.2)Ce_(0.8)O_(2-δ) sandwiched electrolyte

摘要

In this study, intermediate-temperature solid oxide fuel cells (IT-SOFCs) with a nine-layer structure are constructed via a simple method based on the cost-effective tape castingscreen printing-co-firing process with the structure composed of a NiO-based four-layer anode, a Sm0.2Ce0.8O2-$(SDC)/La0.8Sr0.2Ga0.8Mg0.2O3_$ (LSGM)/SDC tri-layer electrolyte, and an La0.6Sr0.4Co0.2Fe0.8O3-$ (LSCF)-based bi-layer cathode. The resultant SDC (4.14 mu m)/LSGM (1.47 mu m)/SDC (4.14 mu m) tri-layer electrolyte exhibits good continuity and a highly dense structure. The Ro and Rp values of the single cell are observed to be 0.15 and 0.08 U cm2 at 800 degrees C, respectively, and the MPD of the cell is 1.08 Wcm-2. The high MPD of the cell appears to be associate with the significantly lower area-specific resistance and the reasonably high OCV. Compared to those with a similar electrolyte thickness reported in prior studies, the nine-layer anode-supported IT-SOFC with a tri-layer electrolyte developed by the study demonstrates superior cell properties. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.