1 research outputs found
Revealing the Charge Transport Mechanism in Polymerized Ionic Liquids: Insight from High Pressure Conductivity Studies
Polymerized ionic liquids (polyILs),
composed mostly of organic
ions covalently bonded to the polymer backbone and free counterions,
are considered as ideal electrolytes for various electrochemical devices,
including fuel cells, supercapacitors, and batteries. Despite large
structural diversity of these systems, all of them reveal a universal
but poorly understood feature: a charge transport faster than the
segmental dynamics. To address this issue, we studied three novel
polymer electrolyte membranes for fuel cells as well as four single-ion
conductors, including highly conductive siloxane-based polyIL. Our
ambient and high pressure studies revealed fundamental differences
in the conducting properties of the examined systems. We demonstrate
that the proposed methodology is a powerful tool to identify the charge
transport mechanism in polyILs in general and thereby contribute to
unraveling the microscopic nature of the decoupling phenomenon in
these materials