
326 Electrochemically Enabled Sustainability
EDLCs tend to store relatively larger charges. The total charge (q) stored in
the double-layer capacitor is proportional to its potential (V) with its capaci-
tance (C) as proportionality constant; that is qαV or q = C × V. Accordingly,
V = q/C. The charge and discharge reactions on the activated carbon anode
and its potential can be expressed as follows:
eC//H VV);
node dis
charge
discharge
++ −
+− −+
(
sccharged-anodeanode anode
= /
(8.2)
In Equation 8.2, C
s
represents the carbon atoms at the electrode surface, //
represents the double layer where charges are accumulated on either si