@article{64,
  author = {David Bozym and Betül Uralcan and David Limmer and Michael Pope and Nicholas Szamreta and Pablo Debenedetti and Ilhan Aksay},
  title = {Anomalous capacitance maximum of the glassy carbon-ionic liquid interface through dilution with organic solvents},
  abstract = {<p>We use electrochemical impedance spectroscopy to measure the effect of diluting a hydrophobic room temperature ionic liquid with miscible organic solvents on the differential capacitance of the glassy carbon–electrolyte interface. We show that the minimum differential capacitance increases with dilution and reaches a maximum value at ionic liquid contents near 5–10 mol% (i.e., ∼1 M). We provide evidence that mixtures with 1,2-dichloroethane, a low-dielectric constant solvent, yield the largest gains in capacitance near the open circuit potential when compared against two traditional solvents, acetonitrile and propylene carbonate. To provide a fundamental basis for these observations, we use a coarse-grained model to relate structural variations at the double layer to the occurrence of the maximum. Our results reveal the potential for the enhancement of double-layer capacitance through dilution.</p>
},
  year = {2015},
  journal = {The journal of physical chemistry letters},
  volume = {6},
  number = {13},
  pages = {2644-2648},
  publisher = {American Chemical Society},
  url = {https://doi.org/10.1021/acs.jpclett.5b00899},
}