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2005 Fiscal Year Final Research Report Summary

Novel anode material for Li ion secondary battery by wet deposition process.

Research Project

Project/Area Number 15205024
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials/Devices
Research InstitutionWaseda University

Principal Investigator

OSAKA Tetsuya  Waseda University, Faculty of Science and Engineering, Professor, 理工学術院, 教授 (20097249)

Co-Investigator(Kenkyū-buntansha) MOMMA Toshiyuki  Waseda University, Faculty of Science and Engineering, Assistant professor, 理工学術院, 助教授 (10277840)
Project Period (FY) 2003 – 2005
KeywordsLi secondary batteries / Formation and control of nano-structured materials / Clusters ・ particles / Nano materials / Electrochemistry
Research Abstract

From our studies on the high energy density Ni38-Sn62 alloy anodes for Li ion batteries until March 2004, we have clarified that the solid phase reaction of Ni_3Sn_4 phase in the electrode and Li shows good reversibility, therefore enabling its high energy density which exceeds that of conventional anode materials. This year, we have focused on the evaluation of a long term charge - discharge cycling of the electrode, and the accompanying changes in its electrode property.
As a result, we have clarified that the electroplated Ni_<38>Sn_<62> alloy thin film shows good anode property that realizes more than 150 cycles with a high capacity of 500 mA/g. Regarding the changes in the crystal structures of the electrode, it has been indicated that with the repeated cycling of the alloy thin film and Li, the periodicity of the crystal becomes lower. Particularly, we have shown that after repeated cycling, some unreacted low crystalline LiSn alloy phases starts to be detected after discharge. Fr … More om the observations on the surface morphology changes, the occlusions of the pores observed after the initial cycles in our previous studies were confirmed. To investigate the reasons for the good cyclability obtained regardless of such changes in the structure and morphology, we measured the diffusion coefficient of Li in the electrode. No large changes were seen for the first 3 cycles, and the value was indicated to be approximately 6.43 x 10^<-10> cm^2 s^<-1>. Even after 10 cycling, the increase of the value was only to 8.04 x 10^<-10> cm^2 s^<-1>, and it was shown that the appropriate diffiusivity of Li in the solid is maintained with cycling. Studies on the annealing of the electrode have shown that the grain boundary of the electrode may be accounting as the diffusion pathways for Li.
We believe that our studies that have been conducted with scope on the use of alloy anode materials in long-term use will make important contributions to the indications for the establishment of design manuals for Sn-based anode materials. Less

  • Research Products

    (8 results)

All 2005 2003

All Journal Article (8 results)

  • [Journal Article] Changes of electro-deposited Sn-Ni alloy thin film for lithium ion battery anodes during charge discharge cyling2005

    • Author(s)
      H.Mukaibo, T.Momma, T.Osaka
    • Journal Title

      Journal of Power Sources 146

      Pages: 457-463

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Structural and Morphological Modifications of a Nanosized 62 Atom Percent Sn-Ni Thin Film Anode during Reaction with Lithium2005

    • Author(s)
      H.Mukaibo, T.Momma, M.MohamediほしT.Osaka
    • Journal Title

      Journal of The Electrochemical Society 152

      Pages: A560-A565

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Changes of electro-deposited Sn-Ni alloy thin film for lithium ion battery anodes during charge discharge cycling2005

    • Author(s)
      H.Mukaibo, T.Momma, T.Osaka
    • Journal Title

      Journal of Power Sources vol.146

      Pages: 457-463

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Structural and Morphological Modifications of a Nanosized 62 Atom Percent Sn-Ni Thin Film Anode during Reaction with Lithium2005

    • Author(s)
      H.Mukaibo, T.Momma, M.Mohamedi, T.Osaka
    • Journal Title

      Journal of The Electrochemical Society vol.152

      Pages: A560-A565

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electrodeposited Sn-Ni alloy film as a high capacity anode material for lithium-ion secondary batteries2003

    • Author(s)
      H.Mukaibo, T.Sumi, T.Yokoshima, T.Momma, T.Osaka
    • Journal Title

      Electrochemical and Solid State Letters 6

      Pages: A218-A220

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] PEO-LiBF_4錯体およびポリスチレンからなる相互連続複合体電解質のリチウム二次電池電解質としての評価2003

    • Author(s)
      T.Momma, H.Ito, H.Nara, H.Mukaibo, T.Passerini, T.Osaka
    • Journal Title

      Electrochemistry 71

      Pages: 1182-1186

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electrodeposited Sn-Ni alloy film as a high capacity anode material for lithium-ion secondary batteries2003

    • Author(s)
      H.Mukaibo, T.Sumi, T.Yokoshima, T.Momma, T.Osaka
    • Journal Title

      Electrochemical and Solid State Letters vol.6

      Pages: A218-A220

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characteristics of Interpenetrated Polymer Network System Made of Polyethylene Oxide - LiBF4 Complex and Polystyrene as the Electrolyte for Lithium Secondary Battery2003

    • Author(s)
      T.Momma, H.Ito, H.Nara, H.Mukaibo, T.Passerini, T.Osaka
    • Journal Title

      Electrochemistry vol.71

      Pages: 1182-1186

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

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Published: 2007-12-13  

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