in-situ observation of restructuing dynamics of ionic liquids on electrodes

2016 Fiscal Year Final Research Report

• Project/Area Number: 25810044
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Functional solid state chemistry
• Research Institution: Nagoya Institute of Technology (2015-2016); Hokkaido University (2013-2014)
• Principal Investigator: Motobayashi Kenta 名古屋工業大学, 工学(系)研究科(研究院), 助教 (60609600)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 表面界面科学 / イオン液体 / 電気化学 / 表面増強赤外分光法

Outline of Final Research Achievements

Structures and dynamics of ionic liquid/electrode interfaces, where electrochemical reactions occur, have been investigated by using surface-enhanced infrared absorption spectroscopy. As a result, "hysteresis behavior" was found, which means that the exchange between cations and anions at the first ionic layer on the electrode surface occurs at different electrode potential depending on the direction of the potential scan. This behavior is affected by the size of constituent ions of the ionic liquid. A kind of resistive interaction between ions for exchange of ions results in the formation of ionic layer on the surface which can interfare electrochemical reactions.
We also investigated the dissolvation states of water and Li+ and their effect on the interfacial structures.

Free Research Field

表面界面科学