  Temperature dependence of the capacitance of the electrical double layer
(EDL) in concentrated electrolytes/ionic liquids has been under debates for
decades. To rationalise the capacitance vs temperature dependence, we run
molecular dynamics simulations of the EDL at variable temperatures. We show
that the dependence is related to the smearing of the EDL multilayer structure
with increasing temperature. The results are in agreement with the recent
experimental data. To explain the results, we propose a phenomenological ionic
bilayer model.
