Ultra-thin (less than 200 nm) yttria-stabilized zirconia (YSZ) blocking layers are employed at the anode side of a 1-μm-thick gadolinia-doped ceria (GDC) thin-film electrolyte by pulsed laser deposition. Their effects on a GDC thin-film electrolyte solid-oxide fuel cell (TF-SOFC) are presented. Without blocking layers, the open cell voltage (OCV) of the GDC TF-SOFC is about 0.6 V. By inserting the blocking layer, the OCV increases to over 1 V. As a result, the maximum power density of the TF-SOFC increases from 377 mW cm -2 to over 1 W cm -2 at 600°C. The present study demonstrates the possibility of obtaining the critical performance at a low temperature regime using thin-film GDC electrolytes.
Bibliographical noteFunding Information:
This work was supported by the Institutional Research Project of the Korea Institute of Science and Technology (KIST) and the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Korea (2011-0031579).
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering