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2006 Fiscal Year Final Research Report Summary

Hierarchical tunnel design for rapid transport of ion in solid state materials

Research Project

Project/Area Number 17360464
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Energy engineering
Research InstitutionKyoto University

Principal Investigator

YAO Takeshi  Kyoto University, Graduate School of Energy Science, PROFESSOR, エネルギー科学研究科, 教授 (50115953)

Co-Investigator(Kenkyū-buntansha) HIBINO Mitsuhiro  Kyoto University, Graduate School of Energy Science, ASSOCIATE PROFESSOR, エネルギー科学研究科, 助教授 (20270910)
Project Period (FY) 2005 – 2006
KeywordsSolid state electrochemistry / Ionic conductivity / Lithium ion battery / Vanadium cobalt oxide / Intercalation / Fuel cell / Mixed conductor / X-ray absorption fine structure
Research Abstract

1. We established the solid state method for synthesis of vanadium cobalt oxide, CoV_3O_8, which has tunnels for one dimensional ionic transport. It was examined as electrode material for lithium ion battery. The electrochemical reaction of CoV_3O_8 with lithium was found to proceed as follows. First lithium intercalated in CoV_3O_8. Second an amorphous substance was generated. Finally a crystalline substance, whose XRD peaks can be indexed on the basis of a face centered cubic cell, was generated. On the other hand, charge can be done. Therefore, discharge-charge cycles were possible. In particular, high coulombic efficiency near unity in the second cycle or later was observed. Measurement and analysis of open circuit potentials at various lithium insertion levels indicated that such reversible discharge-charge was due to lithium insertion in the amorphous substance and extraction out of that.
2. Hexagonal tungsten trioxide (h-WO_3), which has tunnels in its structure, is a metastable … More phase of WO_3. The tunnel accommodates various kinds of ions and provides them transport path. Amorphous peroxopolytungstic acid (PPTA), which is one of solid state acids, is a significant precursor of hexagonal tungsten trioxide. We analyzed structure of this material using X-ray absorption measurements. As a result, we acquired knowledge concerning correlation of polyhedral variation with temperatures of thermal treatment. For instance, corner shared polyhedra became dominant, compared to edge shared ones with increase in temperature. The polymerization of the polyhedra and change in coordination number of W-O were clarified. Furthermore, the evolution of structural change from PPTA to h-WO_3 was observed.
3. Ba_2In_2O_5 is known to have oxygen vacancy in high concentration, which allows oxide ionic conduction. We synthesized various Ba_2In_2O_5-derivative oxides and studied their properties. BaIn_<1-x>M_xO_<3-δ> (M = Fe and Co) was found to be a good electronic and oxide ionic conductor. A single chamber fuel cells using high oxide ionic conductor BaLaInO_<5.5> were constructed. The relationship between fuel supply conditions and performance of the cell was studied in detail. Less

  • Research Products

    (15 results)

All 2006 2005

All Journal Article (15 results)

  • [Journal Article] Single Chamber Solid Oxide Fuel Cell Using BaLaIn_2O_<5.5> Electrolyte2006

    • Author(s)
      Mitsuhiro Hibino, Dai Michiba, Kenichi Kanatani, Hiroaki Suzuki, Takeshi Yao
    • Journal Title

      Advances in Science and Technology 45

      Pages: 1875-1878

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electric Property of Mixed Conductor BaIn_<1-x>Co_xO_<3-δ>2006

    • Author(s)
      Teruaki Kobayashi, Yasuaki Senoo, Mitsuhiro Hibino, Takeshi Tao
    • Journal Title

      Solid State Ionics 177・19-25

      Pages: 1743-1746

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 欠陥ペロブスカイト型電解質を用いた一室式燃料電池の開発2006

    • Author(s)
      日比野光宏, 八尾健
    • Journal Title

      化学フロンティア17「新エネルギー最前線-環境調和型エネルギシステムの構築を目指して-」、化学同人 17

      Pages: 49-54

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 低次元構造型エネルギー材料の構造解析2006

    • Author(s)
      日比野光宏, 八尾健
    • Journal Title

      化学フロンティア17「新エネルギー最前線-環境調和型エネルギシステムの構築を目指して-」、化学同人 17

      Pages: 176-182

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electric Property of Mixed Conductor BaIn_<1-x>Co_xO_<3-δ>2006

    • Author(s)
      Teruaki Kobayashi, Yasuaki Senoo, Mitsuhiro Hibino, Takeshi Yao
    • Journal Title

      Solid State Ionics 177(19-25)

      Pages: 1743-1746

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 欠陥ペロブスカイト型電解質を用いた一室式燃料電池の開発2006

    • Author(s)
      日比野光宏, 八尾健
    • Journal Title

      化学フロンティア17 「新エネルギー最前線-環境調和型エネルギシステムの構築を目指して-」(化学同人) 17巻

      Pages: 49-54

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 低次元構造型エネルギー材料の構造解析2006

    • Author(s)
      日比野光宏, 八尾健
    • Journal Title

      化学フロンティア17 「新エネルギー最前線-環境調和型エネルギシステムの構築を目指して-」(化学同人) 17巻

      Pages: 176-182

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Lithium Insertion and Extraction of Cobalt Vanadium Oxide CoV_3O_82005

    • Author(s)
      Mitsuhiro Hibino, Naoshi Ozawa, Takashi Murakami, Masayuki Nakamura, Takeshi Yao
    • Journal Title

      Electrochemical and solid state letters 8・10

      Pages: A500-503

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electrical conductivity of Ba_<1-x>La_xSc_<1-y>Zr_yO_<3-δ> with defective perovskite structure2005

    • Author(s)
      Teruaki Kobayashi, Hidenobu Watanabe, Mitsuhiro Hibino, Takeshi Yao
    • Journal Title

      Solid State Ionics 176・31-34

      Pages: 2439-2443

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Single Chamber Solid Oxide Fuel Cell using BaLaIn_2O_<5.5> Solid Electrolyte2005

    • Author(s)
      Seiichi Asahara, Dai Michiba, Mitsuhiro Hibino, Takeshi Yao
    • Journal Title

      Electrochemical and solid state letters 8・9

      Pages: A449-451

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Improvement of Cycle Life of Spinel Type of Lithium Manganese Oxide by Addition of Other Spinel Compounds During Synthesis2005

    • Author(s)
      Mitsuhiro Hibino, Masayuki Nakamura, Yuji Kamitaka, Naoshi Ozawa, Takeshi Yao
    • Journal Title

      Solid State Ionics 177・26-32

      Pages: 2653-2656

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Lithium Insertion and Extraction of Cobalt Vanadium Oxide CoV_3O_82005

    • Author(s)
      Mitsuhiro Hibino, Naoshi Ozawa, Takashi Murakami, Masayuki Nakamura, Takeshi Yao
    • Journal Title

      Electrochemical and solid state letters 8(10)

      Pages: A500-503

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electrical conductivity of Ba_<1-x>La_xSc_<1-y>Zr_yO_<3-δ> with defective perovskite structure2005

    • Author(s)
      Teruaki Kobayashi Hidenobu Watanabe, Mitsuhiro Hibino, Takeshi Yao
    • Journal Title

      Solid State Ionics 176(31-34)

      Pages: 2439-2443

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Single Chamber Solid Oxide Fuel Cell using BaLaIn_2O<5.5> Solid Electrolyte2005

    • Author(s)
      Seiichi Asahara, Dai Michiba, Mitsuhiro Hibino, Takeshi Yao
    • Journal Title

      Electrochemical and solid state letters 8(9)

      Pages: A449-451

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Improvement of Cycle Life of Spinel Type of Lithium Manganese Oxide by Addition of Other Spinel Compounds During Synthesis2005

    • Author(s)
      Mitsuhiro Hibino, Masayuki Nakamura, Yuji Kamitaka, Naoshi Ozawa, Takeshi Yao
    • Journal Title

      Solid State Ionics 177(26-32)

      Pages: 2653-2656

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2008-05-27  

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