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Development of the Photoelectrolysis Cell for Energy Storage Using Silicon Electrode

Research Project

Project/Area Number 59840010
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 物理化学一般
Research InstitutionOsaka University

Principal Investigator

TSUBOMURA Hiroshi  Faculty of Engineering Science, Osaka University, 基礎工学部, 教授 (20029367)

Co-Investigator(Kenkyū-buntansha) 吉村 求  三菱電機株式会社, 中央研究所, 主事
平田 郁之  三菱電機株式会社, 中央研究所, 主幹
NAKATO Yoshihiro  Faculty of Engineering Science, Osaka University, 基礎工学部, 助教授 (70029502)
INOUE Yoshiro  Faculty of Engineering Science, Osaka University, 基礎工学部, 助手 (30093371)
ITO Ryuzo  Faculty of Engineering Science, Osaka University, 基礎工学部, 教授 (10025869)
HIRATA Ikuyuki  Central Research Laboratory, Mitsubishi. Electric Corp.
YOSHIMURA Motomu  Central Research Laboratory, Mitsubishi Electric Corp.
Project Period (FY) 1984 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1986: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1985: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1984: ¥4,800,000 (Direct Cost: ¥4,800,000)
KeywordsChemical conversion of solar energy / Semiconductor electrode / Photoelectrchemistry / p-n Junction / Silicon / Energy conversion efficiensy / Photoelectrochemical cell / 最適設計 / 太陽エネルギー / シリコン電極 / 薄膜被覆電極 / 流通型電解槽 / 電極配置
Research Abstract

The decomposition of hydrogen iodide into hydrogen and iodine by use of a photoelectrochemical cell, equipped with a metal-coated p-n junction silicon electrode and a platinum counterelectrode, has been studied for the purpose of the conversion of solar energy into chemical energy. The <P^+> -n Si photoanode was remarkably stabilized by coating with a very thin (1-nm thick) platinum, tungsten or molybdenum layer having good light trasparency. The photocurrent showed no decay for more than 5000 h and the conversion efficiency exceeded 8 %. For the case of cells in which hydrogen is evolved on the <n^+> -p Si photocathode, a very high conversion efficiency of 10.8 % was obtained by using a new-type electrode having an n-type amorphous Si/p-type crystalline Si heterojunction structure. This value is the highest so far reported as to the direct solar-to chemical conversion.
The main factors controlling the conversion efficiency of a photoelectrochemical cell are: (1) ohmic resistance, (2) absortion of light by electrolyte, and (3) nonuniformity of current density on an electrode. It has been found that subdivision of a large electrode into smaller ones makes the current density distribution uniform and the ohmic resistance small. Taking account of these effects, the optimal geometry of a module has been determined, and the method of design of photoelectrochemical cells composed of these modules has been given.

Report

(2 results)
  • 1986 Final Research Report Summary
  • 1985 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Y.Nakato: Bull.Chem.Soc.Jpn.57. 355-360 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y.Nakato: J.Phys.Chem.88. 4218-4222 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y.Nakato: J.Electrochem.Soc.132. 330-334 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] H.Tsubomura: Can.J.Chem.63. 1759-1762 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y.Nakato: J.Electrochem.Soc.133. 900-904 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y.Nakato: J.Electrochem.Soc.134. 353-358 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K.Ueda: Chem.Letters.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] M.Matsumura: Sol.Energy Mater.13. 57-64 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K.Ueda: Solar Energy Mater.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 伊藤龍象: 化学工学論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 伊藤龍象: 化学工学論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Nakato: "p-n Junction Silicon Electrode Coated with Noble Metal for Efficient Solar Photoelectrolysis of Hydrogen Iodide" Bull. Chem. Soc. Jpn.57. 355-360 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Nakato: "Hydrogen Evolution and Iodine Reduction on an Illuminated n-p Junction Silicon Electrode and Its Application to Efficient Solar Photoelectrolysis of Hydrogen Iodide" J. Phys. Chem.88. 4218-4222 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Nakato: "ESCA and Photoelectrochemical Studies of p-n Junction Silicon Electrodes Protected by Platinum Deposition for Use in Solar Energy Conversion" J. Electrochem. Soc.132. 330-334 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] H. Tsubomura: "Metal Oxide Coated p-n Junction Silicon Electrodes for Photoelectrochemical Solar Energy Conversion" Can. J. Chem.63. 1759-1762 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Nakato: "Tungsten- or Molybdenum-Coated p-n Junction Silicon Electrodes for Efficient and Stable Photoelectrochemical Solar Enery Conversion" J. Electrochem. Soc.133. 900-904 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Nakato: "Decomposition Potentials of Crystalline Silicon as Related to the Photocurrent Stability of p-n Junction Silicon Semiconductor Electrodes" J. Electrochem. Soc.134. 353-358 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Ueda: "Efficient Solar to Chemical Conversion With an n-Type Amorphous Silicon/p-Type Crystalline Silicon Heterojunction Electrode" Chem. Letters.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] M. Matsumura: "Photoelectrochemical Hydrogen Evolution Using Amorphous Silicon Electrodes Having p-i-n or p-i-n-p-i-n Junctions" Sol. Energy Mater.13. 57-64 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Ueda: "Efficient and Stable Solar to Chemical Conversion with an <n^+> -p Junction Crystalline Silicon Electrode Having a Textured Surface" Solar Energy Mater.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] R. Ito: "Evaluation of Characteristics in the Energy Conversion System Using the Semiconductor Photochemical Electrode" Kagaku Kogaku Ronbunshu.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] R. Ito: "Design of the Energy Conversion System Using the Semiconductor Photochemical Electrode" Kagaku Kogaku Ronbunshu.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] J.Electrochem.Soc.132-02. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] Can.J.Chem.60-07. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] Sol.Energy Mater.13-01. (1986)

    • Related Report
      1985 Annual Research Report
  • [Publications] J.Electrochem.Soc.133-06. (1986)

    • Related Report
      1985 Annual Research Report
  • [Publications] J.Electrochem.Soc.133-06. (1986)J.Electrochem.Soc.

    • Related Report
      1985 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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