淡江大學機構典藏:Item 987654321/76130
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62797/95867 (66%)
造访人次 : 3731331      在线人数 : 656
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/76130


    题名: (R,M)2(Zr,Ti)2O7- d 作為SOFC電解質材料的研究開發
    其它题名: Research and development of SOFC electrolyte materials, (R,M)2(Zr,Ti)2O7-d
    作者: 高惠春
    贡献者: 淡江大學化學學系
    关键词: 氧離子導體;固態氧化物燃料電池;螢石;焦綠石;鈦酸鈣礦;oxide ion conductors;SOFC;fluorite;pyrochlore;perovskite
    日期: 2011-01
    上传时间: 2012-05-02 09:51:06 (UTC+8)
    摘要: 本計畫主要的研究目標是開發有較高氧離子導電度且適合於應用在中溫 (IT, 400700 C) 固態氧化物燃料電池 (IT-SOFC) 中作為電解質的材料。傳統的SOFC的操作溫度是8001000 C,對組裝材料有很高的要求,使得材料的研究變成SOFC技術進入市場的主要挑戰。降低SOFC的操作溫度需要高導電度的氧離子導體,它們是有pyrochlore 結構的(R,M)2(Zr,Ti)2O7-、螢石結構的CeO2和Bi2O3、以及perovskite 結構的 (R,M)BO3-,其中R是稀土元素,M是1價或2價的金屬元素,B可能為24價的過渡金屬或是主族元素。以上材料中的元素若含有混合原子價時,其電子導電度會上升,使其不利於作為燃料電池電解質。如何穩定這些元素的原子價將是本研究的重要方向。基本上會以摻雜的方式去穩定Ce4+、Ti4+、Bi3+或其他元素的原子價。在Ce 和Ti中,要穩定較高的原子價,即4價;在Bi中,卻要穩定較低的原子價,即3價,所以,作法上會有差異。
    In this project, development of high oxide ion conductors for the advanced intermediate temperature (IT, 400700 C) solid oxide fuel cell (IT-SOFC) application is the major goal. The high operating temperature (HT, 8001000 C) of the conventional SOFC technology puts very high demands on the materials and technology, which is the reason why the material R&D still poses a major challenge for further development of the SOFC technology into the market. In order to lower the operating temperature, the electrolyte should have higher oxide ion conductivity. Possible candidates are (R,M)2(Zr,Ti)2O7- with pyrochlore structure, CeO2 and Bi2O3 with fluorite structure, and (R,M)BO3- with perovskite structure, where R is a rare earth element, M is a 1+ or 2+ metallic element and B is an element with 24 valence state transition metal or main group element. If the materials have mixed valence cations existing, electronic conductivity would be increased and become improper electrolytes used in the fuel cell. How to stabilize the preferred valence state is an important direction of this research. Doping is one way. However, the higher valence state (4+) of Ce and Ti should be preserved; on the other hand, the lower valence state (3+) should be stabilized for Bi. Different solutions should be adopted.
    显示于类别:[化學學系暨研究所] 研究報告

    文件中的档案:

    没有与此文件相关的档案.

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈