The bold lines (solid and dash-dotted) correspond to the values predicted by Equation , where α is ~0.92 for Vpulse = 2.5 V and Vreq = 1.5 V based on the separation of the main reduction and oxidation features in the CV in Figure . We use εDMSO = 46.7 to obtain λD and show the curve for both a diffusion coefficient of cobalt in DMSO of 5*10 -10 m 2 /s, based on measurements of CoCl2 in water and scaled with the viscosity η of DMSO (ηwater : ηDMSO = 1:2, with D ∝ 1/ η using Walden's rule), and for D = 7*10 - 11 m 2 /s, found in literature . The difference between those values is expected to be due to the solvation of cobalt ions with either water or DMSO. As our experiments are carried out under ambient conditions, and the DMSO is hygroscopic, the actual diffusion coefficient is expected to be in between these values depending on the cobalt solvation .