Construction of innovative proton conductors by precise structural control of inorganic-organic hybrid crystals

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05232
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Tokai University
• Principal Investigator: Ito Takeru 東海大学, 理学部, 教授 (50376935)
• Co-Investigator(Kenkyū-buntansha): 小口 真一 東海大学, 理学部, 准教授 (90580499)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 無機－有機ハイブリッド / ポリ酸 / 界面活性剤 / イオン液体 / 結晶 / プロトン伝導性

Outline of Final Research Achievements

Polyoxometalate inorganic cluster anions were hybridized with cationic surfactants and ionic-liquids to obtain several inorganic-organic hybrid crystals. The composition and structure of the hybrid crystals can be precisely controlled by changing the organic cations and crystallization conditions. Proton, magnesium, and calcium ions were successfully introduced into the hybrid crystals. These hybrid crystals were conductive at 298 to 573 K, which could possibly applicable to new solid electrolytes for fuel-cell and post lithium-ion batteries.

Free Research Field

材料化学（クラスター分子を用いた無機－有機ハイブリッド材料の創製と機能発現）

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた無機－有機ハイブリッド結晶は、いずれも世界的に唯一無二の化合物であり、学術的意義は非常に高い。良好なプロトン伝導性を発現するハイブリッド結晶も得られており、現行の燃料電池の性能向上、次世代型燃料電池の創出に貢献できると期待される。熱安定性の向上など更なる性能向上がなされれば実装化なども視野に入ってくるので、環境負荷低減型の社会の実現へ向けて社会的波及効果も大きいといえる。