Exploring a new solid-state ionics in hydrides containing hydride complexes with high hydrogen coordination

2018 Fiscal Year Final Research Report

• Project/Area Number: 17K19168
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials chemistry, Energy-related chemistry, and related fields
• Research Institution: Tohoku University
• Principal Investigator: Takagi Shigeyuki 東北大学, 金属材料研究所, 准教授 (50409455)
• Research Collaborator: ORIMO Shin-ichi ; IKESHOJI Tamio ; SATO Toyoto
• Project Period (FY): 2017-06-30 – 2019-03-31
• Keywords: 水素化物 / 遷移金属錯体水素化物 / 固体イオニクス

Outline of Final Research Achievements

While rotating polyanions have been acknowledged as significantly promoting cation transport in solid matter, the high temperature required to activate rotation has been a practical drawback. In this study, we proposed transition-metal hydride complexes with high hydrogen coordination as a new class of rotatable polyanions. By means of a combined theoretical and experimental approach, we succeeded in capturing the emergence of "pseudorotation" that is expected to lead to a development of new solid-state ionics.

Free Research Field

計算材料科学

Academic Significance and Societal Importance of the Research Achievements

これまでイオン伝導体として全く認識されていなかった遷移金属錯体水素化物において、新たな固体イオニクスの獲得にも繋がる重要な知見を得た。本研究成果は水素化物関連分野の発展のみならず、全固体二次電池関連の広範な学問分野における新たな研究領域開拓に貢献できるものと期待される。