Measured (symbols)
and simulated (line) CAPMIX cycle in the cell
voltage-exchanged charge per gram of electrode space. Latin numbers
refer to the four different steps of a CAPMIX cycle, as numbered in
the main text. The exchanged charge is the integral of the current
(Iext) through the external load in the
charge and discharge steps, its zero value corresponding to the initial
state. Characteristics of prototype cell: two parallel plate, Norit
S30 carbon (BET area: 1650 m2/g) electrodes; geometric
area of electrodes A = 1.5 × 1.5 cm2; electrode nominal thickness Le = 100
μm; distance between electrodes δ = 1 mm; external loads Rext,fresh = 25Ω and Rext,saline = 5Ω. D = DmA = DNaCl. Free parameters
of the simulation: CSt,vol = 0.06GF/m3; pmi = 0.3; pmA = 0.4; Le = 85 μm.