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高プロトン伝導性ガラスの開発とその燃料電池への応用

Research Project

Project/Area Number 05F05417
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Inorganic materials/Physical properties
Research InstitutionNagoya Institute of Technology

Principal Investigator

野上 正行  Nagoya Institute of Technology, 大学院・工学研究科, 教授

Co-Investigator(Kenkyū-buntansha) UMA Thanganathan  名古屋工業大学, 大学院・工学研究科, 外国人特別研究員
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2007: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Keywords燃料電池 / 電解質 / ゾルゲル / ガラス / プロトン / 伝導体
Research Abstract

燃料電池の電解質膜として有用な高プロトン伝導性電解質膜を作製するために、ガラスとヘテロポリ酸(PMAやPWA)とのハイブリッド化膜の作製と電解質に応用するのに必要な特性について検討した。ゾル・ゲル法を用いてPO(OCH_3)_3、Si(OC_2H_5)_4、PMAおよびPWAを混合した後、加水分解して均質な溶液にした。乾燥して0.1〜0.3mmの厚さのゲルにして、空気中で600℃にまで加熱することで、P_2O_5-SiO_2-PMA/PWAハイブリッド膜とした。作製した試料の窒素ガス吸着法によって求めた細孔径は2〜6nm、比表面積は400〜700m^2/gと高い多孔質なものであった。電導度は30℃から90℃の範囲で10^<-2>〜10^<-0>S/cmと高い値を示した。室温での伝導度は0.1S/cmとナフィオンに匹敵する高い値のものを得ることができた。作製した膜を電解質にし、白金/カーボン-ナフィオン-ヘテロポリリン酸を電極・触媒にして燃料電池を組み立て、その電池特性を測定したと。結果として、水素・酸素を燃料として送り、30℃で相対湿度30%の条件下で特性を測定したところ、運転時間の増加とともに出力が上昇し、約5時間後に、出力と電流密度がそれぞれ、50mW/cm^2と150mA/cm^2になることがわかった。その後、時間が経過してもそれ程変化することがなかった。燃料電池特性は、ガラス電解質の厚みや、その表面での電極や触媒との接触状態が燃料電池特性に大きく影響して変わることも明らかになった。ガラスの細孔サイズ、細孔表面積および容積を制御することでガラスのプロトン電導度を更に上昇させることができる。また、電解質膜のヤング率を下げることで、電極および触媒との接触を良くし、接触抵抗を抑制できることも分かってきた。これらを合わせて燃料電池特性の最適化を行うことで、現在、単セルで100mW/cm^2を越える出力を得ることも可能との見込みが得られており、ナフィオン製燃料電池に替わるオールセラミックス製燃料電池の実現も可能である見通しを得ることができた。

Report

(3 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (21 results)

All 2007 2006 2005

All Journal Article (21 results) (of which Peer Reviewed: 9 results)

  • [Journal Article] Synthesis and Characterization of Glasses as an Electrolyte for Low-Temperature H_2/O_2 Fuel Cells2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      J.Electrochem.Soc. 154

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The performance of low temperature H_2/O_2 fuel cells based on heteropolyacid glass membranes2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      J.New Mat.Electrochem.Systems 10

      Pages: 75-80

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization and Performance Improvement of H_2/O_2 Fuel Cells Based on Glass Membranes2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      J.Electrochem.Soc. 154

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel glass membfane for low temperature H_2/O_2 fuel cell electrolytes2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      Fuel Cells 7

      Pages: 279-284

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heteropolyacid in glass electrolytes for the development of H_2/O_2 fuel cells2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      Electrochim.Acta 52

      Pages: 6895-6900

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural and Transport Properties of Mixed Phosphotungstic Acid/Phosphomolybdic Acid/SiO_2 Glass Membranes for H_2/O_2 Fuel Cells2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      Chem.Mater. 19

      Pages: 3604-3610

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication and performance of Pt/C electrodes for low temperature H_2/O_2 fuel cell2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      J.Membr.Sci. 302

      Pages: 102-108

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of new glass composite membranes and their properties for low temperature H_2/O_2 fuel cells2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      Chem.Phys.Chem. 8

      Pages: 2227-2234

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Novel glass electrolytes for fuel cells operating at low temperature2007

    • Author(s)
      T. Uma, M. Nogami
    • Journal Title

      ECS Transactions 11

      Pages: 117-121

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis and Characterization of Glasses as an Electrolyte for Low-Temperature H_2/O_2 Fuel Cells2007

    • Author(s)
      T.Uma
    • Journal Title

      J. Electrochem. Soc. 154

    • Related Report
      2006 Annual Research Report
  • [Journal Article] The performance of low temperature H2/O2 fuel cells based on heteropolyacid glass membranes2007

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      J.New Mat.Electrochem.Systems 10

      Pages: 75-80

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Structural and proton conductivity study of P_2O_5-TiO_2-SiO_2 glasses2006

    • Author(s)
      T.Uma, S.Izuhara, M.Nogami
    • Journal Title

      J.European Ceram.Soc. 26

      Pages: 2365-2372

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Characterization and electrochemical properties of P_2O_5-ZrO_2-SiO_2 glasses as proton conducting electrolyte2006

    • Author(s)
      T.Uma, A.Nakao, M.Nogami
    • Journal Title

      Mater.Res.Bull. 41

      Pages: 817-824

    • Related Report
      2006 Annual Research Report
  • [Journal Article] On the development of proton conducting P_2O_5-ZrO_2-SiO_2 glasses for fuel cell electrolytes.2006

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      Mater.Chem.Phys. 98

      Pages: 382-388

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Development of H_2/O_2 fuel cell based on proton conducting P_2O_5-SiO_2-PMA glasses as electrolyte.2006

    • Author(s)
      T.Uma, T.Nogami
    • Journal Title

      Adv.Mater.Res. 11-12

      Pages: 149-152

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Low-temperature operation of H_2/O_2 fuel cells using proton-conducting glasses containing heteropolyacid2006

    • Author(s)
      T.Uma, K.Hattori, M.Nogami
    • Journal Title

      Ionics 12

      Pages: 167-173

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Synthesis and characterization of P_2O_5-SiO_2-X (X=phosphotungstic acid) glasses as electrolyte for low temperature H_2/O_2 fuel cell application2006

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      J.Membr.Sci. 280

      Pages: 744-751

    • Related Report
      2006 Annual Research Report
  • [Journal Article] High performance of H_2/O_2 fuel cells using Pt/C electrodes and P_2O_5-SiO_2-PMA glasses as electrolyte in low temperature2006

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      J.Ceram.Soc.Japan 114

      Pages: 748-753

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Characterization and electrochemical properties of P_2O_5-ZrO_2-SiO_2 glasses as proton conducting electrolyte2006

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      Mater.Res.Bull. 41

      Pages: 817-824

    • Related Report
      2006 Annual Research Report 2005 Annual Research Report
  • [Journal Article] Preparation of sol-gel method P_2O_5-Al_2O_3-SiO_2 glasses and their characterization2005

    • Author(s)
      T.Uma, K.Hattori, M.Nogami
    • Journal Title

      Ionics 11

      Pages: 202-207

    • Related Report
      2006 Annual Research Report 2005 Annual Research Report
  • [Journal Article] Preparation of sol-gel method P_2O_5-Al_2O_3-SiO_2 glasses and their characterization2005

    • Author(s)
      T.Uma, M.Nogami
    • Journal Title

      J.Non-Cryst.Solids 351

      Pages: 3325-33

    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2024-03-26  

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