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Development of fabrication process of a-Si by liquid quenching for mass production

Research Project

Project/Area Number 18H01760
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26060:Metals production and resources production-related
Research InstitutionTohoku University

Principal Investigator

OKADA JUNPEI  東北大学, 金属材料研究所, 准教授 (90373282)

Co-Investigator(Kenkyū-buntansha) 和田 武  東北大学, 金属材料研究所, 准教授 (10431602)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
KeywordsアモルファスSi / 液体急冷 / 多孔質 / アモルファス / シリコン / 過冷却液体 / アモルファスシリコン / リチウムイオン電池 / 液体急冷法 / ガスアトマイズ / アトマイズ
Outline of Final Research Achievements

Amorphous Si, which is widely used as a base material for solar cells, is currently available in thin film form made by chemical vapor deposition. If amorphous Si can be obtained in large quantities by liquid quenching, like many other amorphous metals, the range of applications is expected to further expand. However, despite many previous attempts, it has not been possible to obtain bulk amorphous Si directly from liquid Si. In this study, we succeeded in producing amorphous Si by liquid quenching using the single-roll method.

Academic Significance and Societal Importance of the Research Achievements

アモルファスシリコン(a-Si)は、リチウムイオン電池(Lithium-ion batteries: LIB)の容量を現在の2倍以上に増大でき、さらに全固体LIBの負極としても優れた特性を示す。そのため、a-Siを工業的に大量生産する手法の開発が急がれている。本研究では、汎用的な液体急冷法を用いたa-Siの作製法の開発に成功した。これにより、気相成長法よりも効率よくa-Siを作製することが可能になる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (4 results)

All 2020 2019

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 1 results)

  • [Journal Article] Phase relation between supercooled liquid and amorphous silicon2020

    • Author(s)
      J.T. Okada P.H.-L. Sit R. Ishikawa T. Ishikawa J. Chen K.S. Nakayama K. Maeda Y. Yokoyama Y. Watanabe P.-F. Paradis Y. Watanabe S. Nanao Y. Ikuhara K. Kimura S. Uda
    • Journal Title

      Applied Physics Letters

      Volume: 116 Issue: 9 Pages: 093705-093705

    • DOI

      10.1063/1.5129059

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Patent(Industrial Property Rights)] リチウムイオン二次電池用の負極合剤、およびリチウムイオン二次電池2020

    • Inventor(s)
      中山幸仁、岡田純平
    • Industrial Property Rights Holder
      中山幸仁、岡田純平
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 多孔質アモルファスシリコン、多孔質アモルファスシリコンの製造方法および二次電池2019

    • Inventor(s)
      岡田純平、中山幸仁、和田武
    • Industrial Property Rights Holder
      岡田純平、中山幸仁、和田武
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Acquisition Date
      2020
    • Related Report
      2020 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 多孔質アモルファスシリコン、多孔質アモルファスシリコンの製造方法および二次電池2019

    • Inventor(s)
      岡田純平、中山幸仁、和田武
    • Industrial Property Rights Holder
      岡田純平、中山幸仁、和田武
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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