(684a) Time Resolved Ion Dynamics in Carbon Supercapacitor Electrodes Using In Situ Infrared Spectroscopy

Ion transport in energy storage devices (e.g., batteries, supercapacitors) is the fundamental process that dictates charge/discharge rates. However, there are few experimental techniques that can measure molecular level ion transport in response to an input voltage. In this study, we apply a novel in situ infrared spectroscopy measurement technique to investigate ion transport in carbon electrodes of electrochemical double layer supercapacitors. Ion transport properties of porous nano-sized carbide derived carbons (CDC) were compared to non-porous carbon onions for both pure ionic liquid electrolytes and mixtures of propylene carbonate and ionic liquid.