Development of mixed-anion hydride materials with ionics propeties

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K14755
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Institute of Physical and Chemical Research (2023); Institute for Molecular Science (2022)
• Principal Investigator: Takeiri Fumitaka 国立研究開発法人理化学研究所, 開拓研究本部, 研究員 (20824080)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: ヒドリド / 複合アニオン / メカノケミストリー / 高圧合成

Outline of Final Research Achievements

A room-temperature working hydride electrolyte has been successfully developed by compositional optimization of lanthanum hydride LaH3 based on mixed-anion. We have also discovered several new materials by focusing on sulfide ions, which have been limited in their mixed-anion with hydride. We also succeeded in high-pressure synthesis of hydride compounds containing GaO4 polyanions and found that their crystal structures adopt anti-perovskite structures. We have also developed hydride materials by mechanochemical methods, and in addition to their average structure, we have analyzed their local structures in a joint research project, and obtained findings that suggest a correlation with their functions.

Free Research Field

無機固体化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、近年発展の著しいヒドリド化合物の探索範囲を、従来の水素化物または酸水素化物から大幅に拡張し、実際に幾つかの新物質の発見に成功し、またイオニクスに代表される機能性を見出した。代表的な成果である、室温で作動するヒドリド電解質の開発は、将来的なヒドリド電気化学デバイスの開発という観点から重要なマイルストーンとなる。