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Research of lithium-6 isotope enrichment technology by electrodialysis under special voltage profile

Research Project

Project/Area Number 19H02639
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 31010:Nuclear engineering-related
Research InstitutionHirosaki University

Principal Investigator

Sasaki Kazuya  弘前大学, 理工学研究科, 教授 (70631810)

Co-Investigator(Kenkyū-buntansha) 向井 啓祐  京都大学, エネルギー理工学研究所, 助教 (70807700)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Keywordsリチウム / 同位体濃縮 / 電気透析 / 核融合 / 増殖材料 / 核融合炉 / 原理
Outline of Research at the Start

核融合炉実現の最大の課題は、燃料となる三重水素の製造に不可欠なリチウム同位体(6Li)濃縮技術の開発である。研究代表者は、電気透析技術に基づく新たな6Li濃縮原理を考案し、1段の濃縮工程での濃縮比率1.11を達成した。これは提唱されている電気透析での理論的最大濃縮比率(1.08)を上回り、従来提唱されていた原理とは異なる機構で濃縮が生じていることを示唆する。推定している機構によれば、1段の工程だけで極めて高濃度に濃縮できる可能性もある。本研究では高い濃縮比率を実現した原理を解明する。更に、濃縮方法や条件を最適化し、より高い濃縮率を達成する。実用化装置の開発に向け、濃縮速度の向上方法も検討する。

Outline of Final Research Achievements

In the lithium isotope enrichment by electrodialysis applying a special voltage profile that achieved high isotope enrichment in our past research, we studied to clarify the mechanism of obtaining a large isotope enrichment.
It was found that isotope enrichment occurs in two processes, surface adsorption-dissociation and ion migration in the electrolyte, and the contribution rate of the latter increases at lower temperatures. We investigated the temperature dependence of the migration rate of 6Li and 7Li and clarified that there is a difference in the activation energy of migration. From this result, it was found that the lower the temperature, the higher the isotope enrichment rate. Furthermore, as a result of investigating the time course of the isotope enrichment rate by making a prototype scale device, it was confirmed that the isotope ratio gradually decreased toward the natural isotope ratio with the passage of time.

Academic Significance and Societal Importance of the Research Achievements

質量数6のリチウム同位体(6Li)を90%以上に濃縮するための技術を開発するための有望な技術の一つであるリチウムイオン伝導性固体電解質を隔膜とする電気透析技術を高度化し、あるいはカスケード化することで実用化するために必要な、基礎的知見を獲得した。本技術は、21世紀中ごろに実用化が望まれている核融合炉発電における最大の課題の一つである6Li同位体濃縮率を高めたリチウムを提供するといった社会的意義がある。また、電気透析時の同位体による挙動の違いを解明するという点で学術的意義がある。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (24 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (19 results) (of which Int'l Joint Research: 11 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 2 results)

  • [Journal Article] Energy balance of lithium recovery by electrodialysis using La0.57Li0.29TiO3 electrolyte2021

    • Author(s)
      Kazuya Sasaki, Ryosuke Hiraka, Hiroto Takahashi and Kiyoto Shin-mura
    • Journal Title

      Fusion Engineering and Design

      Volume: 170 Pages: 112500-112500

    • DOI

      10.1016/j.fusengdes.2021.112500

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Temperature dependence of isotope separation coefficient by electrodialysis using lithium ion conductor La0.57Li0.29TiO32021

    • Author(s)
      Kiyoto Shin-mura, Ryoya Tokuyoshi, Sogo Shinohara, Yuma Hachinohe and Kazuya Sasaki
    • Journal Title

      Fusion Engineering and Design

      Volume: 171 Pages: 112577-112577

    • DOI

      10.1016/j.fusengdes.2021.112577

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] La0.57Li0.29TiO3電解質隔膜を用いる電気透析リチウム回収の特性2022

    • Author(s)
      丹羽栄貴,新村潔人,本多駿資,田副博文,佐々木一哉
    • Organizer
      2022年電気化学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] La0.57Li0.29TiO3電解質隔膜を用いる電気透析リチウム回収におけるリチウム源溶液中共存イオンの影響2022

    • Author(s)
      進藤裕太,新村潔人,徳吉諒哉,福坂岳,丹羽栄貴,佐々木一哉
    • Organizer
      2022年電気化学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] La0.57Li0.29TiO3電解質隔膜を用いる電気透析6Li同位体濃縮の温度依存性2022

    • Author(s)
      徳吉諒哉,新村潔人,進藤裕太,福坂岳,丹羽栄貴,佐々木一哉
    • Organizer
      2022年電気化学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] La0.57Li0.29TiO3電解質隔膜を用いた2電源3電極方式電気化学ポンピング法によるリチウム回収性能の印加電圧依存性2022

    • Author(s)
      丹羽栄貴,新村潔人,田副博文,佐々木一哉
    • Organizer
      2022年電気化学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Recovery rate depending on the type of lithium source solution during lithium recovery by electrodialysis2022

    • Author(s)
      Yuta Shindo, Kiyoto Shin-mura, Ryoya Tokuyoshi, Kazuya Sasaki
    • Organizer
      32nd symposium on fusion technology (SOFT-32)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Applied Voltage of Two-Power Three-Electrode Electrodialysis using Lithium-Ion Electrolyte La0.57Li0.29TiO32021

    • Author(s)
      Kiyoto Shin-mura, Ryoya Tokuyoshi, Yuta Shindo, Taiyo Fukui, Kazuya Sasaki
    • Organizer
      72nd Annual Meeting of the International Society of Electrochemistry (ISE-72)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of Lithium Recovery from Lithium Chloride Aqueous Solution by Electrodialysis using Lithium-Ion Solid Electrolyte Li0.29La0.57TiO3 and Investigation of the Effect of Sodium-Ion2021

    • Author(s)
      Yuta Shindo, Kiyoto Shin-mura, Ryoya Tokuyoshi, Taiyo Fukui, Kazuya Sasaki
    • Organizer
      72nd Annual Meeting of the International Society of Electrochemistry (ISE-72)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of element distribution changes in solid lithium electrolyte generated by electrodialysis using rf-GD-OES2021

    • Author(s)
      Kazuya Sasaki, Keisuke Mukai, Kiyoto Shin-mura, Hiroto Takahashi, Ryoya Tokuyoshi, Ikuma Takahashi, Ryuta Kasada
    • Organizer
      The 12th International Symposium of Advanced Energy Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of applied voltage on isotope separation factor by electrodialysis using lithium ion conductive electrolyte La0.57Li0.29TiO32020

    • Author(s)
      Kiyoto Shin-mura, Ryoya Tokuyoshi, Kazuya Sasaki
    • Organizer
      PRiME 2020 (The Electrochemical Society)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of electrode overpotential in secondary solution on lithium recovery rate for electrodialysis with two power supplies and three electrodes2020

    • Author(s)
      Kiyoto Shin-mura, Ryoya Tokuyoshi, Kazuya Sasaki
    • Organizer
      PRiME 2020 (The Electrochemical Society)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Temperature dependence of isotope separation coefficient by electrodialysis using lithium ion conductor La0.57Li0.29TiO32020

    • Author(s)
      Kiyoto Shin-mura, Ryoya Tokuyoshi, Sogo Shinohara, Yuma Hachinohe, Kazuya Sasaki
    • Organizer
      31th symposium on fusion technology (SOFT-31)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Elucidation of change in element density distribution in solid lithium electrolyte during electrodialysis by rf-GD-OES analysis2020

    • Author(s)
      Kazuya Sasaki, Kiyoto Shin-mura, Rio Takemura, Hiroto Takahashi, Keisuke Mukai, Ryuta Kasada, Tsuyoshi Hoshino
    • Organizer
      The 11th International Symposium of Advanced Energy Science
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electrochemical impedance time variation of electrodialysis using lithium ion electrolyte La0.57Li0.29TiO32020

    • Author(s)
      Kiyoto Shin-mura, Sogo Shinohara, Yuma Hachinohe, Kazuya Sasaki
    • Organizer
      71st Annual Meeting of the International Society of Electrochemistry (ISE-71)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of secondary solution concentration on litium electrodialysis using litium ion electrolyte Li0.29La0.57TiO32020

    • Author(s)
      Hiroto Takahashi, Kiyoto Shin-mura, Ryosuke Hiraka, Ryoya Tokuyoshi, Kazuya Sasaki
    • Organizer
      71st Annual Meeting of the International Society of Electrochemistry (ISE-71)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] EPMA-SXES分析による高機能性トリチウム増殖材料用のLi系酸化物の化学的安定性解明手法の検討2019

    • Author(s)
      佐々木一哉、新村潔人、向井啓祐、笠田竜太、星野毅
    • Organizer
      ZE共同利用・共同研究_H31年度成果報告会
    • Related Report
      2019 Annual Research Report
  • [Presentation] リチウムイオン伝導体La0.57Li0.29TiO3の二端子電気透析時のインピーダンスの変化2019

    • Author(s)
      篠原 爽吾, 八戸 悠真, 佐々木 一哉
    • Organizer
      第39回電子材料研究討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 三極式電気透析によるリチウム回収のエネルギー効率2019

    • Author(s)
      新村 潔人, 井岡 聖一郎, 佐々木 一哉
    • Organizer
      第39回電子材料研究討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] リチウムイオン電解質La0.59Li0.29TiO3を用いた三極式電気透析デバイスの二次側溶液濃度の影響2019

    • Author(s)
      新村 潔人, 井岡 聖一郎, 佐々木 一哉
    • Organizer
      第39回電子材料研究討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of valence electron structure of Li metal/oxides by soft X-ray emission spectroscopy2019

    • Author(s)
      Keisuke Mukai, Ryuta Kasada, Kazuya Sasaki, Satoshi Konishi
    • Organizer
      20th International Workshop on Ceramic Breeder Blanket Interactions (CBBI-20)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] リチウム同位体濃縮装置および多段式リチウム同位体濃縮装置、ならびにリチウム同位体濃縮方法2022

    • Inventor(s)
      佐々木一哉、新村潔人
    • Industrial Property Rights Holder
      弘前大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] リチウム同位体濃縮装置および多段式リチウム同位体濃縮装置、ならびにリチウム同位体濃縮方法2022

    • Inventor(s)
      佐々木一哉、新村潔人
    • Industrial Property Rights Holder
      弘前大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-061400
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] リチウム同位体濃縮装置および多段式リチウム同位体濃縮装置、ならびにリチウム同位体濃縮方法2021

    • Inventor(s)
      佐々木一哉、新村潔人
    • Industrial Property Rights Holder
      弘前大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report
    • Overseas

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Published: 2019-04-18   Modified: 2024-01-30  

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