Post-Annealing of Thin-Film Yttria Stabilized Zirconia Electrolytes for Anode-Supported Low-Temperature Solid Oxide Fuel Cells
- Authors
- Bae, Jiwoong; Chang, Ikwhang; Kang, Sungmin; Hong, Soonwook; Cha, Suk Won; Kim, Young Beom
- Issue Date
- Dec-2014
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Solid Oxide Fuel Cell; Post-Annealing Process; Sputter; Ceramic Electrolyte; Yttria-Stabilized Zirconia
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.12, pp.9294 - 9299
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 14
- Number
- 12
- Start Page
- 9294
- End Page
- 9299
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158436
- DOI
- 10.1166/jnn.2014.10121
- ISSN
- 1533-4880
- Abstract
- The effects of a post-annealing treatment on the performance of low-temperature solid oxide fuel cells (LT-SOFCs) were investigated. Nickel oxide-samarium doped ceria (NiO-SDC) anodes and yttria stabilized zirconia (YSZ) electrolytes were deposited on anodized aluminum oxide (AAO) membranes by RF sputtering and DC reactive sputtering, respectively. The half-cell of YSZ/NiO-SDC was then heat-treated at 600 degrees C for 10 h, and a porous platinum (Pt) cathode was deposited on the annealed YSZ/NiO-SDC structure by DC magnetron sputtering. Electrochemical impedance spectroscopy (EIS) analysis revealed a significant decrease in the ohmic resistance and a slight increase in the cathodic impedance. Such a result may be attributed to the increased grain size and enhanced crystallinity of the YSZ electrolyte after the heat treatment. The maximum power density observed for the heat-treated cell was 35 mW/cm(2) at 450 degrees C, more than three times higher than the 10 mW/cm2 value obtained for the as-deposited cell.
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