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

• DOI: 10.1021/acsami.6b16660
• Publication Date: 2017-03-01T17:13:48Z
• Authors: Dong Woo Joh; Jeong Hwa Park; Doyeub Kim; Eric D. Wachsman; Kang Taek Lee
• Keywords: Cathodes; 670; Interfaces; High Performance; electrolytes; 02 engineering and technology; 7. Clean energy; Stabilized Bismuth Oxides; Solid Oxide Fuel Cells (SOFC); Electrolytes; Degradation; stabilized bismuth oxides; Perovskites; Conductivity; solid oxide fuel cells; Technologies; 540; 3. Good health; Surfaces; Conductors; Bilayers; Oxygen Reduction; Doped Ceria; 0210 nano-technology; high performance; bilayers

A functionally graded Bi1.6Er0.4O3 (ESB)/Y0.16Zr0.84O1.92 (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.