Symmetric effect on electrical double-layer characteristics and molecular assembly interplay in imidazolium-based Ionic liquid electrolytes in supercapacitor models.

Studies on the ion-layer formation of imidazolium-based ionic liquids have extensively explored how to improve in-depth knowledge of electrical double-layer (EDL) properties. In this computational study, 1-alkyl-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Cmim][NTf]), namely, [Cmim][NTf] and [Cmim][NTf], inside a simulated supercapacitor were investigated to expose an symmetric alkyl chain effect. Molecular dynamic simulations of a supercapacitor model with graphite electrodes were conducted.

Direct Measurement of the Differential Capacitance of Deep Eutectic Solvents on Platinum and Glassy Carbon Electrodes.

Differential capacitance is a crucial parameter that connects the experimental observation of electrical double-layer behavior with theoretical models. However, the current number of reported differential capacitance values for deep eutectic solvents remains limited, making it challenging to verify or refute existing models. In this study, we systematically investigate the differential capacitance in deep eutectic solvents using chronoamperometry.

Direct Measurement of the Differential Capacitance of Solvent-Free and Dilute Ionic Liquids.

Differential capacitance is a key quantity in the understanding of electrical double-layer charging of electrolytes. However, experimental observations of ionic liquid systems are controversial, inconsistent, and often unable of confirming or refuting existing theories as well as highlighting discrepancies between the measurement techniques. We study the differential capacitance in both pure and dilute ionic liquids at room temperature.

Near-Wall Molecular Ordering of Dilute Ionic Liquids.

The interfacial behavior of ionic liquids promises tunable lubrication as well as playing an integral role in ion diffusion for electron transfer. Diluting the ionic liquids optimizes bulk parameters, such as electric conductivity, and one would expect dilution to disrupt the near-wall molecular ordering. We study this ordering in the ionic liquids [Emim][NTf], [Emim][DCA], and [Cmpyr][NTf], diluted in the solvent dimethyl sulfoxide.