Study on H- conductive materials for the development of novel ionics devices
| Project/Area Number |
15H05497
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic industrial materials
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| Research Institution | Institute for Molecular Science |
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Principal Investigator |
Kobayashi Genki 分子科学研究所, 協奏分子システム研究センター, 特任准教授 (30609847)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
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| Keywords | ヒドリドイオン導電体 / 超イオン導電体 / 固体イオニクス / 酸水素化物 / ヒドリドインターカレーション / 電気化学デバイス / インターカレーション / エネルギー貯蔵・変換 / 固体化学 / イオン伝導体 / ヒドリドイオン伝導体 / ヒドリド導電体 |
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| Outline of Final Research Achievements |
Pure H- conduction was realized in the La2-x-ySrx+yLiH1-x+yO3-y system (LSLHO). The all-solid-state Ti/LSLHO/TiH2 cell exhibited a discharge reaction with hydrogen storage/desorption on the electrodes. The present success confirms not only the capability of LSLHO to act as a solid hydride electrolyte, but also the possibility of developing electrochemical solid devices based on H－ conduction.
We established the simple synthesis method at ambient pressure (AP) for LSLHO. An AP sample with low H- concentration exhibited a crystal structure and a conductivity similar to those observed for the HP sample. In contrast, Sr2LiH3O synthesized at AP has super lattice that is formed by ordering of H-/vacancies and H/O in the axial and apical anion sites, respectively. The H- conductivity of AP sample of Sr2LiH3O jumped around 648 K with disordering them, and showed high conductivity over 1 mS/cm.
We synthesized a H- super ionic conductor Ba2LiH3O possessing a conductivity over 10 mS/cm at 588 K
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、ヒドリドイオン導電性の固体電解質として機能するLSLHOを開発し、それを用いた電気化学デバイス開発の可能性を示した。これは、固体イオニクスと電気化学の新たな研究対象であり、学術的意義は大きい。さらに、その後の物質開発を進展させ、中温域で超イオン導電性を示すBa2LiHO3の開発にも成功した。
将来的にヒドリドとプロトンの間の水素の電荷自由度を活用する電気化学反応を構築することができれば、エネルギー貯蔵・変換、物質変換に応用できる可能性があり、持続可能社会の実現に資する要素技術になり得る。
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Report
(4 results)
Research Products
(80 results)
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[Journal Article] Pure H- conduction in oxyhydrides2016
Author(s)
Genki Kobayashi, Yoyo Hinuma, Shinji Matsuoka, Akihiro Watanabe, Muhammad Iqbal, Masaaki Hirayama, Masao Yonemura, Takashi Kamiyama, Isao Tanaka, Ryoji Kanno
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Journal Title
Science
Volume: 351
Issue: 6279
Pages: 1314-1317
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Hydride Ion Conduction in Oxyhydrides2017
Author(s)
Genki Kobayashi
Organizer
2017 Hydrogen Metal Systems Gordon Research Conference, Making the Hydrogen Economy Work - New Developments and Recent Applications
Place of Presentation
Easton, MA, USA
Year and Date
2017-07-16
Related Report
Int'l Joint Research / Invited
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[Presentation] Synthesis of new H- conductor Ba2LiH3O2017
Author(s)
A. Watanabe, Genki Kobayashi, Y. Imai, M. Yonemura, K. Suzuki, M. Hirayama, R. Kanno
Organizer
21th International Conference on Solid State Ionics
Place of Presentation
Padua, Italy
Year and Date
2017-06-18
Related Report
Int'l Joint Research
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[Presentation] ヒドリドイオン導電体の開発2017
Author(s)
小林玄器
Organizer
2016年度量子ビームサイエンスフェスタ
Place of Presentation
つくば国際会議場, 茨城県, つくば市
Year and Date
2017-03-14
Related Report
Invited
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[Presentation] Hydride Ion Conduction in Oxyhydrides2017
Author(s)
Genki Kobayashi, Akihiro Watanabe, Naoki Matsui, Yuki Iwasaki, Yumiko Imai, Akiko Kubota, Masao Yonemura, Kota Suzuki, Masaaki Hirayama, Ryoji Kanno
Organizer
The 6th Toyota RIKEN International Workshop (New Trends in Solid State Chemistry: from Oxides to Mixed Anion Compounds)
Related Report
Int'l Joint Research
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[Presentation] Synthesis and H- Conductivity of Ba2LiH3-2xO1+x2016
Author(s)
G. Kobayashi, A. Watanabe, K. Suzuki, M. Hirayama, M. Yonemura, and R. Kanno
Organizer
PACIFIC RIM MEETING ON ELECTROCHEMICAL AND SOLID-STATE SCIENCE (PRiME 2016)
Place of Presentation
Hawaii, USA
Year and Date
2016-10-02
Related Report
Int'l Joint Research
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[Presentation] ヒドリドイオン導電体の開発2016
Author(s)
小林玄器
Organizer
新世代研究所 第1回界面ナノ科学研究会
Place of Presentation
湯沢グランドホテル, 新潟県, 湯沢町
Year and Date
2016-07-04
Related Report
Invited
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[Presentation] Synthesis and H- Conductivity of Ba2LiH3O2015
Author(s)
A. Watanabe, G. Kobayashi, K. Suzuki, M. Hirayama and R. Kanno
Organizer
The Fourth International Education Forum on Environment and Energy Science
Place of Presentation
Hawaii, USA
Year and Date
2015-12-07
Related Report
Int'l Joint Research
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[Presentation] 新規酸水素化物の合成とH-導電特性2015
Author(s)
小林 玄器, 日沼 洋陽, 渡邉 明尋, Iqbal Muhammad, 平山 雅章, 米村 雅雄, 田中 功, 菅野了次
Organizer
第56回電池討論会
Place of Presentation
ウインクあいち, 愛知県 名古屋市
Year and Date
2015-11-12
Related Report
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[Presentation] ヒドリド導電性酸水素化物の合成2015
Author(s)
小林玄器, 今井弓子, 日沼洋陽, 渡邉明尋, Muhammad IQBAL, 平山雅章, 田中功, 菅野了次
Organizer
粉体粉末冶金協会平成27年度春季大会
Place of Presentation
早稲田大学, 東京都
Year and Date
2015-05-27
Related Report
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