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High Pressure Synthesis of Novel Hydrides with High Hydrogen Content for Fuel Cell Vehicle

Research Project

Project/Area Number 14350364
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

OKADA Masuo  Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (80133049)

Co-Investigator(Kenkyū-buntansha) TAKAMURA Hitoshi  Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (30250715)
KAMEGAWA Atsunori  Tohoku University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (90292242)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 2004: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 2003: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2002: ¥9,500,000 (Direct Cost: ¥9,500,000)
KeywordsHydrogen storage / New hydrides / high pressure synthesis / Fuel cell / New Mg-Re hydrides / New Mg-Cu compound / New Mg-Ni compound / 高圧合成法 / 水素化物 / 水素 / アルカリ土類金属 / 水素吸蔵合金 / 水素エネルギー / プロチウム
Research Abstract

The purpose of this study is to explore new hydrides of the Mg-RE systems (RE= La, Ce, Pr, Nd) and Mg-TM systems (TM= Ti, Vr, V, Mn, Fe, Co, Ni, Cu, Zn) using the cubic anvil-type apparatus, for the usage for the future fuel cell vehicle.
For MgH_2 -x ml% LaH_3, the new hydride was obtained in the range of 25<=x<= 33. The hydrogen content of the new hydride with x=25 was found to be 4.1mass%H, which is corresponding to Mg_3LaH_9, by means of fusion extraction analysis. The crystal structure of newly found hydrides of Mg_3LaH_9, was a primitive tetragonal with a lattice parameter of a=0.8193nm, c=0.5028 nm. The hydrides showed an endothermic peak at around 620K, which decreases with increasing La content.
Mg-Ce-H and Mg-Pr-H systems were also explored. Mg_3CeH_9 and Mg_3PrH_9 with a primitive tetragonal structure were synthesized as new compounds under 5GPa. The crystal structures of newly found hydrides of Mg_3CeH_9 and Mg_3PrH_9, was a primitive tetragonal with a lattice parameter of a=0.8118nm, c=0.4979 nm, and of a=0.8118nm, c=0.4979nm, respectively. The hydrogen contents of these hydrides were 3.7 and 3.9mass%, respectively.
In Mg-Ni system, Mg_4-Ni compound belonging to space group F-43m was synthesized as a new compound under 6 GPa, which decomposed to the Mg and Mg_2Ni phases at 545 K as exothermic reaction. In Mg-Cu system, two new compounds such as the MgCu compound which has CsCl-type structure and Mg_<51>Cu_<20> compound belonging to space group Immm, were synthesized at 1073 K for 8 h under 6 GPa. The MgCu compound decomposed to the Mg_2Cu and MgCu_2 phases at 500 K and Mg_<51>Cu_<20> compound did to the Mg and Mg_2Cu phases at 430 K, respectively

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (13 results)

All 2004 2003 Other

All Journal Article (10 results) Publications (3 results)

  • [Journal Article] The Electronic Structure of MgY2H6+d High-Pressure Hydride2004

    • Author(s)
      H.Takamura, Y.Goto, A.Kamegawa, M.Okada
    • Journal Title

      Materials Transaction 44

      Pages: 583-588

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High Pressure Synthesis of Novel Compounds in Mg-TM Systems (TM=Ti~Zn)2004

    • Author(s)
      H.Watanabe, Y.Goto, H.Kakuta, A.Kamegawa, H.Takamura, M.Okada
    • Journal Title

      Materials Transaction 45

      Pages: 1350-1354

    • NAID

      10012906483

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] The Electronic Structure of MgY_2H_<6+d> High-Pressure Hydride2004

    • Author(s)
      H.Takamura, Y.Goto, A.Kamegawa, M.Okada
    • Journal Title

      Materials Transaction vol.44

      Pages: 583-588

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High Pressure Synthesis of Novel Compounds in Mg-TM Systems (TM=Ti〜Zn)2004

    • Author(s)
      H.Watanabe, Y.Goto, H.Kakuta, A.Kamegawa, H.Takamura, M.Okada
    • Journal Title

      Materials Transaction vol.45

      Pages: 1350-1354

    • NAID

      10012906483

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High Pressure Synthesis of Novel Compounds in Mg-TM Systems (TM=Ti~Zn)2004

    • Author(s)
      H.Watanabe, Y.Goto, H.Kakuta, A.Kamegawa, _H.Takamura, M.Okada
    • Journal Title

      Materials Transaction 45・4

      Pages: 1350-1354

    • NAID

      10012906483

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Synthesis and Crystal Structure of New Hydrides in Mg-RE Systems under High-pressure (RE=La,Ce,Pr)2004

    • Author(s)
      Y.Goto, H.Kakuta, A.Kamegawa, H.Takamura, M.Okada
    • Journal Title

      Materials Science Forum 475-479

      Pages: 2521-2526

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of Synthesis Pressure on Hydride Phases in Mg-M Systems (M=Mn,Y)2003

    • Author(s)
      Y.Goto, H.Kakuta, A.Kamegawa, H.Takamura, M.Okada
    • Journal Title

      Science and Technology of Advanced Materials 4

      Pages: 333-338

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High-Pressure Synthesis of Novel Hydrides in Mg-RE Systems and Their Hydrogen Content (RE=Y,La)2003

    • Author(s)
      H.Takamura, Y.Goto, A.Kamegawa, M.Okada
    • Journal Title

      Materials Science Forum 419-422

      Pages: 983-988

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Synthesis Pressure on Hydride Phases in Mg-M Systems (M=Mn, Y)2003

    • Author(s)
      Y.Goto, H.Kakuta, A.Kamegawa, H.Takamura, M.Okada
    • Journal Title

      Science and Technology of Advanced Materials vol.4

      Pages: 333-338

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High-Pressure Synthesis of Novel Hydrides in Mg-RE Systems and Their Hydrogen Content (RE=Y, La)2003

    • Author(s)
      H.Takamura, Y.Goto, A.Kamegawa, M.Okada
    • Journal Title

      Materials Science Forum vols.419-422

      Pages: 983-988

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Hitoshi Takamura: "The Electronic Structure of MgY_2H_<6+δ> High-Pressure Hydride"Materials Transactions. 44・4. 583-588 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Takamura: "High-Pressure Synthesis of Novel Hydrides in Mg-RE Systems and Their Hydrogen Content (RE=Y, La)"Materials Science Forum. 419-422. 983-988 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Takamura: "Crystal Structure Of Novel Hydrides In A Mg-Ni-H System Prepared Under An Ultra High Pressure"Journal of Alloys and Compounds. 330-332. 157-161 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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