Measurements and study for a single cell of solid oxide fuel cell by using Sm0.5Sr0.5CoO3-δ-based electrode materials
| Autor: | Fan-Hao Jhong, 鐘凡皓 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 Solid state reaction and sol-gel method have been introduced to prepare the electrode and electrolyte materials for solid oxide fuel cell in this study. Sm, Sr and Co based perovskite electrode materials (Sm0.5Sr0.5Co0.8M0.2O3-δ，M=Fe、Cr) and Sm doped ceria (Sm0.2Ce0.8O1.9，SDC) with fluorite lattice structure had successfully synthesized. First of all, the sintering process was held at 1500℃ to sinter the bulk electrolyte, and screen printing technique was involved in order to print the electrode material onto the surface of bulk electrolyte to be the electrode parts of a single cell. Afterward, co-firing procedure was performed at 1000℃ for 2 hours to integrate the electrode materials with electrolyte layer. The coherency of the interface between electrodes and electrolyte was observed via scanning electron microscopy. The measurements of power density were using four probe technique. Mounted the single cell unit in a dual chamber holder and filled hydrogen and ambient air to the surface of anode and cathode within the temperature range from 500~700℃, respectively. Meanwhile, measurements of open circuit voltage, current densities and impedance spectroscopy were executed simultaneously. In this study, SDC supported single cell unit had maximum open circuit voltage 0.80878V at 600℃. This single cell could generate maximum power density 102.2 W/cm2, Ohmic resistance 0.2Ω-cm2 and polarization resistance 2.465Ω-cm2 at 700℃. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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