Mixed Electrolytes Composed of Ionic Liquids and Various Solvents for Next Generation Batteries

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13815
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Device related chemistry
• Research Institution: Yokohama National University
• Principal Investigator: DOKKO KAORU 横浜国立大学, 大学院工学研究院, 教授 (70438117)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 電池 / イオン液体 / 溶媒和イオン液体 / 電解質溶液

Outline of Final Research Achievements

Solvate ionic liquids consisting of tetraglyme (G4) and Li salts were mixed with various solvents. In the solvate ionic liquids, G4 and Li cation form 1:1 complex cation [Li(G4)]. Hydrophobic ionic liquids, which have long alkyl chains in cation structure, were used as solvents to dissolve the solvate ionic liquids. The solvate structure of [Li(G4)] was kept in the mixed electrolyte owing to the weak interaction between solvate ionic liquid and hydrophobic ionic liquids. The water absorption of the electrolyte was suppressed by the addition of the hydrophobic ionic liquids. The mixed electrolytes composed of solvate ionic liquids and hydrophobic ionic liquids were applied to Li-air batteries. Li-air battery with mixed electrolyte can be operated under the humidified condition of 28% RH (relative humidity).

Free Research Field

電気化学