Z. Li, K.C. Ng, S. Anderson, M. Jaugstetter, M. Salmeron, M.C. Martin, H.A. Bechtel, S.N. Gilbert Corder
Hunter College of the City University of New York,
United States
Keywords: synchrotron infrared nanospectroscopy, ionic liquids, electric double layers
Summary:
Ionic liquids (ILs) possess several advantages as electrolytes for electric double layer capacitors (EDLCs), most remarkably their wide electrochemical window that can significantly enhance the energy density of EDLCs. The implementation of ILs in EDLCs is contingent upon understanding the behaviors of IL EDLs, a knowledge gap that still exists. Here, we used synchrotron infrared nanospectroscopy to investigate IL EDLs in graphene-capped liquid cells, shedding light on the interfacial dynamics of IL EDLs through their vibrational responses. The insights of this work can benefit the development of supercapacitors based on IL electrolytes.