Figure 6 OCV and peak power density of GDC/YSZ thin-film fuel cell (cell 3) versus dwell time at 450 °C. Conclusions

In this study, we implemented and suggested a promising feasibility of a thin-film low-temperature SOFC using a bilayered electrolyte configuration on the AAO platform. GDC has suffered from its chemical instability and the resulting electronic leakage under a reduction environment. In a thin-film configuration for securing a decent oxygen ion conductivity even at low temperatures (as an LT-SOFC), oxygen permeation through the GDC film became problematic as well. This paper reports that an insertion of a very thin ALD YSZ layer between the anode Pt and the GDC electrolyte significantly improved the electrochemical performance of a cell. At 450°C, a thin-film fuel Idasanutlin mw cell with 850-nm-thick GDC electrolyte showed an OCV of approximately 0.3 V and a power density of approximately 0.01 mW/cm2. On the other hand, a thin-film fuel cell with a bilayered electrolyte consisting of

a 40-nm-thick click here YSZ and a 420-nm-thick GDC reached an OCV of approximately 1.07 V and a power density of approximately 35 mW/cm2. From these results, it was confirmed that the YSZ layer successfully acted as a protective layer. The cell performance is expected to further improve through the microstructural optimization of electrode interfaces and adjustment of chemical compositions of each film. While the fully functional YSZ layer presented here is already very thin (40 nm), there are good chances of reducing the thickness even further considering RVX-208 that a theoretical approach predicted an YSZ-to-GDC thickness ratio of 0.01% would suffice to guarantee electron blockage [30]. Authors’ information SJ and IC are students in

the Graduate School of Convergence Science and Technology, Seoul National University. YHL, JP, and JYP are graduate students in the School of Mechanical and Aerospace Engineering, Seoul National University. MHL is a professor in the School of Engineering at the University of California, Merced. SWC is a professor in the School of Mechanical and Aerospace Engineering, Seoul National University. Acknowledgments This work was supported by the Global Frontier R&D Program in the Center for Multiscale Energy System Stattic clinical trial funded by the National Research Foundation under the Ministry of Education, Science and Technology, Korea (2011–0031569). References 1. O’Hayre R, Cha SW, Colella W, Prinz FB: Fuel Cell Fundamentals. John Wiley & Sons, New York; 2006. 2. Yamamoto O, Taeda Y, Kanno R, Noda M: Perovskite-type oxides as oxygen electrodes for high temperature oxide fuel cells. Solid State Ion 1987, 22:241.CrossRef 3. Lee C, Bae J: Oxidation-resistant thin film coating on ferritic stainless steel by sputtering for solid oxide fuel cells. Thin Solid Films 2008, 516:6432.CrossRef 4.