Electrochemical Properties of YSZ/GDC Bi-Layer Produced by One-Side Dip Coating Method for the Intermediate Temperature Solid Oxide Fuel Cell

Thursday, 27 July 2017
Grand Ballroom East (The Diplomat Beach Resort)
S. Kim (Departmant of Energy Engineering, Hanyang University), I. Jang, C. Kim (Department of Energy Engineering, Hanyang University), H. Yoon (Hanyang University), and U. Paik (Department of Energy Engineering,Hanyang University)
The Gadolinium Doped Ceria (GDC) diffusion barrier layer was formed on the Yttrium Stabilized Zirconia (YSZ) electrolyte to apply La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode system for lowering the operating temperature of Solid Oxide Fuel Cell. In this study, YSZ and GDC layers were coated by one-side dip coating method which possibly coat one-side of anode substrate. Cu(NO3)2 was infiltrated into pre-sintered substrate of anode and electrolyte as a sintering aid for lowering the co-firing temperature which was enough to produce dense electrolyte layer. LSCF-GDC cathode was coated on the GDC layer by screen printing method. The cells were operated at 600℃ and 650℃. The microstructures of the surface and cross-section were observed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). The ohmic and polarization resistance were measured by the Electrochemical Impedance Spectroscopy (EIS).