Deep Eutectic Solvent Transference Number Test Apparatus

Researcher: Sara Jorgenson
Advisor: Dr. Jesse Wainright
Location: Case Western Reserve University
Description: The objective of this project is to obtain the transference numbers of ions in deep eutectic solvents (DESs). A novel Hittorf cell design (front) divides the DES into four sections so that changes in concentration can be observed in each section using UV-Vis Spectroscopy. The redox active species (RAS) is pumped (left) through the carbon felt electrodes to negate mass transfer overpotentials, and it is kept separate from the DES using Nafion membranes so that charge can be passed through the DES while isolating the DES species from the RAS. This research will provide insight into the electrochemical properties of DES-based electrolytes and will quantify the transference numbers of common DESs which have not yet been determined.

Deep Eutectic Solvent Electrochemical Impedance Spectroscopy

Researcher: William Dean
Advisor: Dr. Burcu Gurkan
Location: Case Western Reserve University
Description: Deep Eutectic solvents (DES) are a new class of solvents that have many potential applications replacing traditional aqueous and organic solvents. One way to probe the interfacial interactions of a DES, ethaline, is using electrochemical impedance spectroscopy (EIS). EIS works by measuring the response of an electrochemical system to an applied potential over a set frequency range. Using EIS differential capacitances are determined, giving insight into the macroscopic charge buildup at electrode surfaces.