Functionally Graded Bismuth Oxide/Zirconia Bilayer Electrolytes for High-Performance Intermediate-Temperature Solid Oxide Fuel Cells (IT-SOFCs)

Dong Woo Joh; Jeong Hwa Park; Doyeub Kim; Eric D Wachsman; Kang Taek Lee

doi:10.1021/acsami.6b16660

Functionally Graded Bismuth Oxide/Zirconia Bilayer Electrolytes for High-Performance Intermediate-Temperature Solid Oxide Fuel Cells (IT-SOFCs)

ACS Appl Mater Interfaces. 2017 Mar 15;9(10):8443-8449. doi: 10.1021/acsami.6b16660. Epub 2017 Mar 6.

Authors

Dong Woo Joh¹, Jeong Hwa Park¹, Doyeub Kim¹, Eric D Wachsman², Kang Taek Lee¹

Affiliations

¹ Department of Energy Systems Engineering, DGIST , Daegu 42988, Korea.
² University of Maryland Energy Research Center, University of Maryland , College Park, Maryland 20742, United States.

PMID: 28248479
DOI: 10.1021/acsami.6b16660

Abstract

A functionally graded Bi_1.6Er_0.4O₃ (ESB)/Y_0.16Zr_0.84O_1.92 (YSZ) bilayer electrolyte is successfully developed via a cost-effective screen printing process using nanoscale ESB powders on the tape-cast NiO-YSZ anode support. Because of the highly enhanced oxygen incorporation process at the cathode/electrolyte interface, a novel bilayer solid oxide fuel cell (SOFC) yields extremely high power density of ∼2.1 W cm^-2 at 700 °C, which is a 2.4 times increase compared to that of the YSZ single electrolyte SOFC.

Keywords: bilayers; electrolytes; high performance; solid oxide fuel cells; stabilized bismuth oxides.