
160 Fuel Cells
of the solvent as related to the hydration of the ions and its inuence on the
structure of the double layer.
Example 5.1
Using the Stern model, calculate the total capacitance of the double layer
on an electrode with an applied potential of 0.1 V for a dilute electrolyte
with a charge concentration of (i) 10
–4
mol/L solution and (ii) 10
–2
mol/L.
Consider a single electron transfer reaction and dielectric constant of the
media to be 10 and the separation between charges to be 10 Å.
Answer
The total capacitance of the double layer from the Stern model is given
by Equation 5.4
C
CC
=+
−
11
1
H
,
G
where C
H
and C
G
are given by Equations ...