Structure and Dynamics at Ionic Liquid/Electrode Interfaces

Tuesday, 26 May 2015: 15:00
PDR 7 (Hilton Chicago)
D. Parr IV, J. Chrestenson, K. Malik, M. Molter, C. Zibart, B. Egan, and L. M. Haverhals (Bradley University)
Ionic liquids (ILs) are potentially ‘game changing’ electrolytes for energy conversion applications such as capacitors[i],[ii], batteries[iii],[iv], fuel cells[v],[vi], and solar cells.[vii],[viii]  Significant progress has been made towards utilizing these remarkably adaptable materials for specific applications however, much work remains to generate technologically and economically relevant devices and processes.[ix]  Characterizations of interfaces between IL-based electrolyte/electrode systems are crucial to continued development for these enterprises.  In specific, detailed descriptions and understanding of structure and dynamics at electrolyte/electrode interfaces are necessary to realize engineered progress because device efficiencies are often largely determined by processes that occur at the interface.[x],[xi]  Our presentation will focus on initial efforts to employ spectroscopic techniques that characterize interfacial structure and dynamics between ionic liquid media and electrode surfaces during simultaneous electrochemical perturbation.  In specific, we will present surface enhanced infrared absorption (SEIRA) spectroscopy data for ILs composed of imidazolium-based cations with bis(trifluoromethylsulfonyl)imide anions at nanostructured noble metal electrodes (i.e, Au).

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