Song Li is a Ph.D. candidate at Vanderbilt University and a member of The Fluid Interface Reactions, Structures and Transport (FIRST) Energy Frontier Research Center. Her current research interests include structural organization and interfacial behaviors of room-temperature ionic liquids(RTILs) and their applications in supercapacitors. Guang Feng received his Ph.D. degree in 2010 from Clemson University. He joined Vanderbilt University and (FIRST) Center as a postdoctoral research associate. His current research is focused on the capacitive electrical energy storage and the application of RTILs. Peter T. Cummings received his Ph.D. degree in 1980 from University of Melbourne, Australia. He is the John R. Hall Professor of Chemical Engineering at Vanderbilt University and was the Principal Scientist of the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory. His research interests include molecular-level modeling, electrical energy storage, and the development of new materials used in medicine, electronics.