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| 題名: | Electrical properties of La0.85Sr0.15Ga0.8Mg0.2O3-delta samples prepared by one- or three-stage solid-state calcination process |
| 作者: | Wu, YC (Wu, Yu-Chuan)
Chen, SW (Chen, Shau-Wei) |
| 貢獻者: | 化材系 |
| 關鍵詞: | Solid oxide fuel cell
La1-xSrxGa1-yMgyO3-delta (LSGM)
Electrolyte
Calcination
Solid-state reaction
Impedance |
| 日期: | 2017-11 |
| 上傳時間: | 2018-01-11 11:17:25 (UTC+8) |
| 摘要: | La0.85Sr0.15Ga0.8Mg0.2O3-delta (LSGM1520) samples are prepared by one- or three-stage solid-state calcination process. The influence of calcination and sintering parameters on the densification, grain size, phase structure, conductivity, and activation energy of LSGM1520 electrolyte samples are investigated and the most suitable process method is identified. The results show that the three-stage calcination procedure is effective in preparing higher purity LSGM1520 powders than those obtained with the traditional one-stage calcination procedure. Conductivities of the A2 and C4 electrolyte samples at 800 degrees C are 0.18 and 0.17 S cm(-1), respectively. The A2 and C4 of LSGM1520 electrolyte samples are from the one stage and three-stage calcination procedures, respectively. The open-circuit voltage and maximum power density values of cells prepared using A2 and C4 as electrolytes at 800 degrees C are 1.01 V and 370 mW cm(-2), and 0.97 V and 367 mW cm(-2), respectively. Hence, the A2 electrolyte sample, prepared though a simpler process than the C4 electrolyte, displays good cell performance. Although the A2 sample contains a very small amount of secondary phase, its conductivity and cell performance are not significantly reduced at temperatures above 700 degrees C, as expected. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
| 關聯: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 卷: 42 期: 44 頁碼: 27284-27297 |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 期刊論文
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