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Detailed Program
Paper Number : FU-P01
Time Frame : 12:00~13:30
Presentation Date : Thursday, 27, November
Session Name : Fuel cells and Batteries
Session Chair 1# : -
Session Chair 2# : -
Er0.4Bi1.6O3 Electrolyte for Intermediate-Temperature Solid Oxide Fuel Cell
Ms. Jina Jeung
Chungnam National University
A Solid Oxide Fuel Cell (SOFC) is eco-friendly device which converts fossil fuels to electrical energy. SOFC consists of nonporous metal oxide electrolyte which allows ionic conductivity, cathode, and anode. When the supply of air and fuel to the electrodes of the unit cell, the reduction reaction of oxygen produce oxygen ions, oxygen ions moves to the anode through the electrolyte and the oxygen ions react with hydrogen, which supplied anode, produce water. In this case, the cathode generates electrons and the anode consumed the electrons, so when the two electrodes are connected to each other, the electricity flow. This is the reason for the how can dramatically lower emission of CO2 and NO2. Also SOFC has simple structure and the less worry about loss of supplements or corrosion problems of electrolytes has been promising a future energy system. SOFC operates at high temperature of about 800 ~ 1000¢®É has high power conversion efficiency of the conventional fuel cell. High-temperature solid oxide fuel cells often used as the electrolyte Yittria stabilized zirconia (YSZ) mainly, and SOFC to be used as the electrolyte YSZ is operated near the 1000¢®É. To withstand at the high temperature like 1000¢®É, a production price is rise because of the using expensive high temperature resistant material and components. As a result practical application has been delayed. Therefore, it is required the development of Intermediate Temperature-SOFC (IT-SOFC). Trivalent cation doped ceria and bismuth oxide is effective as a material for IT-SOFC because it has high ionic conductivity at intermediate temperature range (500~700¢®É), so we choose the trivalent cation for Erbium oxide (Er2O3). Erbia stabilized bismuth oxide (Er0.4Bi1.6O3, ESB) has been reported to have high ionic conductivity than the YSZ in the range of intermediate temperature. In this experiment, we make ESB 2inch target for Radio frequency-sputtering (RF-sputtering), using bismuth oxide (Bi2O3) and erbium oxide (Er2O3). By using RF-sputtering system, ESB is deposited on substrate at room temperature and annealed at various temperatures. After that, we confirmed physical characteristics through X-ray diffraction (XRD) and Scanning electron microscope (SEM), and the electrical properties through I-V curves were investigated.
Acknowledgements :