以鈣鈦礦(Perovskite)結構之材料製作固態氧化物燃料電池(SOFC)

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研究生：	許夢舫 Meng-Fang Hsu
論文名稱：	以鈣鈦礦(Perovskite)結構之材料製作固態氧化物燃料電池(SOFC)
指導教授：	吳振名 Jenn-Ming Wu
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 材料科學工程學系 Materials Science and Engineering
論文出版年：	2005
畢業學年度：	93
語文別：	中文
論文頁數：	111
中文關鍵詞：	中溫固態氧化物燃料電池、鈣鈦礦結構、鎵酸鑭
外文關鍵詞：	IT-SOFC, perovskite, lanthanum gallate
相關次數：	點閱：3 下載：0
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為發展中溫固態氧化物燃料電池(IT-SOFCs)本實驗以LaGaO3基材系列固態氧化物為電解質，此氧化物在中低溫度範圍內(600~800℃)具有穩定且高的氧離子傳導特性，因此本實驗選用在鑭鎵氧化物裡參雜Sr及Mg (LSGMg) 作為電池的電解質材料，所搭配的陽極為與電解質結構相同的鑭鎵氧化物中添加Sr與Mn(LSGMn)，陰極為常見的鑭鍶鈷氧化物(LSC)，希望藉由此三種材料的搭配能達到最佳的單電池結構。
我們已從電解質、陽極、陰極的燒結行為，可得到其個別的最佳燒結條件，電解質LSGMg在1450℃下燒結4小時，相對密度可達96%，陽極LSGMn，Mn含量的增加可提升導電度，且最佳燒結溫度為1400℃，陰極LSC之最佳燒結溫度為1200℃，且於800℃下的導電度為1711S/cm，與文獻上相近；亦能夠用等效電路模擬阻抗的分析圖，區分材料本身、晶粒界面及電解質與電極界面所貢獻的阻抗。電池結構則以電解質為支撐，厚度約為1mm，陽極與陰極以網印方法分別網印於電解質上，且能成功地量測到電池的I-V特徵曲線，工作溫度800℃下可得到最高的功率密度為366mW/cm2，未來目標則朝降低電解質厚度及提高陽極導電率方向改進以提升電池的性能。

摘要.................................................... Ⅰ
誌謝.................................................... Ⅱ
目錄.................................................... Ⅲ
表目錄 ................................................. Ⅵ
圖目錄 ................................................. Ⅶ
第一章    緒論 ...........................................1
  1-1  前言 ..............................................1
  1-2  研究動機 ..........................................2
第二章 文獻回顧 ......................................... 4
  2-1  燃料電池之簡介 ................................... 4
　2-2  燃料電池之極化 ................................... 5
  2-3  燃料電池之種類 ................................... 7
　2-4  固態氧化物燃料電池(SOFC) ......................... 8
　  2-4-1  SOFC之原理 ................................... 8
　  2-4-2  SOFC之結構設計 ............................... 9
    2-4-3  SOFC之優點及應用 .............................11
　2-5  SOFC之材料選擇 ...................................11
    2-5-1  電解質材料 ...................................11
    2-5-2  陰極材料 .....................................16
    2-5-3  陽極材料 .....................................17
　  2-6  SOFC之製作方式 .................................18
第三章  實驗程序 ........................................27
　3-1  粉末準備 .........................................27
  3-2  固態反應法製備粉末 ...............................27
  3-3  乾壓法製備試片 ...................................28
  3-4  網印法製備陽極、陰極 .............................29
  3-5  特性分析 .........................................29
    3-5-1  XRD繞射分析 ..................................29
    3-5-2  相對密度與開放孔隙度量測 .....................29
    3-5-3  尺寸收縮量測 .................................31
    3-5-4  導電度量測 ...................................31
    3-5-5  阻抗分析與模擬 ...............................32
    3-5-6  SEM微觀結構分析 ..............................33
    3-5-7  X-ray微區定性分析 ............................33
    3-5-8  電池I-V特徵曲線量測 ..........................33
第四章  結果與討論 ......................................39
  4-1  電解質 ...........................................39
    4-1-1  X光結晶繞射分析 ..............................39
    4-1-2  燒結行為(相對密度、開放孔隙度、尺寸收縮) .....39
    4-1-3  微觀結構 .....................................40
  4-2  陰極 .............................................41
    4-2-1  X光結晶繞射分析 ..............................41
    4-2-2  燒結行為(相對密度、開放孔隙度、尺寸收縮) .....41
    4-2-3  導電率 .......................................41
    4-2-4  網印後之微觀結構 .............................42
  4-3  陽極 .............................................42
    4-3-1  X光結晶繞射分析 ..............................42
    4-3-2  燒結行為(相對密度、開放孔隙度、尺寸收縮) .....42
    4-3-3  導電率 .......................................43
    4-3-4  網印後之微觀結構 .............................44
  4-4  添加pore former (starch)對陽極的影響..............44
    4-4-1  燒結行為(相對密度、開放孔隙度、尺寸收縮) .....44
    4-4-2  導電率 .......................................45
    4-4-3  網印後之微觀結構 .............................45
  4-5  阻抗分析 .........................................46
  4-6  單電池結構 .......................................49
    4-6-1  電極與電解質界面之微區X光定性分析(EDS) .......49
    4-6-2  電池導電率 ...................................50
    4-6-3  電池I-V、I-P特徵曲線 .........................50
      4-6-3-1  LSC/LSGMg/LSGMn ..........................50
      4-6-3-2  LSC/LSGMg/LSGMn+starch ...................52
  4-7  降低陽極燒結溫度對電池特性之影響 .................53
    4-7-1  電極與電解質界面之微區X光定性分析(EDS) .......53
    4-7-2  電池I-V、I-P特徵曲線 .........................53
      4-7-2-1  LSC/LSGMg/LSGMn-1300 .....................53
      4-7-2-2  Pt/LSC/LSGMg/LSGMn43-1300/Pt .............54
第五章  結論 ............................................55
參考資料 ................................................57

                                

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