Charge Transport and Dynamics of 2D-Confined Polymerized Ionic Liquid Blends

The impact of geometrical confinement on ion transport and dynamics in molecular and polymerized is investigated by broadband dielectric spectroscopy. The monomers of ammonium based ionic liquids are filled into unidirectional silica nanopores with mean diameters of 7 nm and studied by Raman spectroscopy in situ to monitor the progress of monomer conversion. Ionic conductivity is also probed at different degrees of polymerization and compared to bulk blends of molecular and polymerized ionic liquids. In agreement with similar systems recently published, it is found that the ionic conductivity in polymerized ionic liquids in nanopores is enhanced compared to their bulk counterparts. The results are discussed within the current theoretical frameworks for describing dynamics and transport in confined polymers.