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Electrical property characterization of electrolyte materials in solid oxide fule cells by AC impedance spectroscopy |
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| รหัสดีโอไอ | |
| Title | Electrical property characterization of electrolyte materials in solid oxide fule cells by AC impedance spectroscopy |
| Creator | Areerak Khamnoi |
| Contributor | Supatra Jinawath, Sumittra Charojrochkul |
| Publisher | Chulalongkorn University |
| Publication Year | 2548 |
| Keyword | Fuel cells, Solid oxide fuel cells, Impedance spectroscopy, Electrolytes |
| Abstract | Yttria-stabilized zirconia (YSZ) is an important solid electrolyte used in solid oxide fuel cells (SOFCs) due to its good electrical (0.1 siemens/cm at 1000 ํC) and mechanical properties. The electrical property of 3, 8 and 10 mol% Y[subscript 2]O[subscript 3]-doped ZrO[subscript 2] were measured using AC-impedance spectroscopy, in the temperature range of 275-600 ํC and over the frequency range of 0.05-10[superscript7] Hz. From the impedance spectra, the bulk and grain boundary resistances of YSZ pellets from various suppliers (MEL, TOSOH, and DAIICHI) were significantly influenced by the containing impurities and the sintering conditions. The impurities in the starting power were analyzed using x-ray fluorescence technique (XRF), while the microstructure was investigated using scanning electron microscope (SEM). The correlation between the electrical conductivity and sintering temperature from various electrolyte materials was developed. As a result, the AC-impedance spectroscopy technique in combination with microstructural investigation can be used to study the electrical property of YSZ effectively. |
| ISBN | 9741418477 |
| URL Website | cuir.car.chula.ac.th |
