釹摻雜鑭鍶鈷鐵氧化物陰極材料應用於質子傳導型固態氧化物燃料電池

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姓名

黃意鈞(Yi-Jun Huang) 查詢紙本館藏

畢業系所

材料科學與工程研究所

論文名稱

釹摻雜鑭鍶鈷鐵氧化物陰極材料應用於質子傳導型固態氧化物燃料電池
(Neodymium doped LaxSr1-xCoyFe1-yO3-δ oxides as the cathode material for proton-conducting solid oxide fuel cells)

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至系統瀏覽論文 (2027-1-20以後開放)

摘要(中)

本研究藉由化學溶液合成法成功製備出釹摻雜鑭鍶鈷鐵氧化物之陰極粉末並作為質子傳輸型固態氧化物燃料電池之陰極材料。利用含釹元素之陰極材料其優異之氧表面交換速率以及高氧離子傳導率之特性，促進了陰極氧還原反應進行，藉此有效地降低電池之電化學阻抗並提升電化學性能。
釹摻雜鑭鍶鈷鐵氧化物陰極之電池於800 ℃之操作溫度下，具有最高之峰值功率密度407.61 mW/cm2，相較於純鑭鍶鈷鐵氧化物陰極之電池約成長6.4 %，且釹摻雜鑭鍶鈷鐵氧化物陰極電池具有最低之歐姆阻抗2.4245 Ω•cm²與極化阻抗0.0654 Ω•cm²，依據本研究結果可得知透過釹摻雜於鑭鍶鈷鐵氧化物，確實改善氧離子傳導速率且有助於電化學性能的提升，但以釹完全置換鑭之電池由於導電率之降低，使氧還原反應進行趨緩，因此導致歐姆阻抗與極化阻抗上升。

摘要(英)

This study successfully synthesized neodymium-doped lanthanum strontium cobalt ferrite oxides cathode powder by chemical solution synthesis method as a cathode material for proton-conducting solid oxide fuel cells. The neodymium-based materials had the characteristics of excellent oxygen surface exchange rate and high oxygen ion conductivity. Therefore, oxygen ions could be transported faster so that it was benefit to promote the oxygen reduction reaction proceeds in the cathode. When the oxygen reduction reaction increases, the electrochemical impedance would decrease. As stated above, the reduction of electrochemical impedance would improve the electrochemical performance of cell effectively.
The neodymium-doped lanthanum strontium cobalt ferrite oxides cell had the highest peak power density of 407.61 mW/cm2 at 800 ℃. Compared to the lanthanum strontium cobalt ferrite oxides cell, the neodymium-doped lanthanum strontium cobalt ferrite oxides had growth by 6.4 %. Meanwhile, the cell had the lowest ohmic impedance (2.4245 Ω•cm²) and polarization impedance (0.0654 Ω•cm²). According to the results of this study, it could be known that the doping of neodymium into lanthanum strontium cobalt ferrite oxides improved the oxygen ion conductivity and it contributed to the improvement of electrochemical performance. However, the lanthanum was replaced completely by neodymium in the perovskite structure and it resulted in poor performance. The neodymium strontium cobalt ferrite oxides cell had higher resistance because it had poor conductivity.

關鍵字(中)

★ 釹
★ 鑭鍶鈷鐵氧化物
★ 陰極
★ 固態氧化物燃料電池

關鍵字(英)

論文目次

目錄

摘要 I
Abstract II
致謝 IV
目錄 V
圖目錄 VII
表目錄 IX
第一章、緒論 1
1.1前言 1
1.2研究背景 4
第二章、文獻回顧 10
2.1固態氧化物燃料電池之工作原理 10
2.2固態氧化物燃料電池結構 13
2.3電池結構設計 20
2.4電化學交流阻抗頻譜 22
2.5電化學分析 23
第三章、實驗方法與步驟 26
3.1實驗參數設計 26
3.2實驗原料 28
3.3儀器 29
3.4實驗流程 31
3.5材料分析 37
3.5.1全電池I-V性能量測 37
3.5.2 X光粉末繞射儀 39
3.5.3掃描式電子顯微鏡 39
3.5.4恆電位阻抗分析儀 40
第四章、實驗結果與討論 42
4.1 XRD分析 43
4.2單電池 I-V 性能測量與分析 46
4.3單電池之EIS測量與分析 49
4.4微結構分析 55
第五章、結論 57
第六章、參考文獻 58

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指導教授

李勝偉(Sheng-Wei Lee)

審核日期

2022-1-25

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