Nanoconfinement of Ionic Liquid into Porous Carbon Electrodes

Planar electrochemical double-layer capacitors (supercapacitors) are strategic elements for the realization of miniaturized autonomous devices requiring energy storage and conversion capabilities. In particular, supercapacitors fabricated with nanoporous carbon electrodes ionic liquids as electrolytes very promising a wide range applications. The understanding control interactions liquid porous interface is both practically fundamentally interesting, because effects surface confinement on structural functional properties liquid. role morphology in has attracted huge interest many disciplines. Here we report direct experimental evidence solid-like structuring confined 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([Bmim][NTf2]), which extends several tens nanometers from thin films. These structures coexist amount its bulk phase. presence phase occurring at affects organization electrified based planar supercapacitors. Our results suggest structured domains not only upper film but also into matrix.