Question

Construction and working of electrochemical double layer capacitor

Answer 1

. Construction
The EDLC consists of two electrodes that are im-
mersed in an electrolyte with a separator between them.
The electrode consists of a current collector in contact
with the active material. In EDLCs, the energy stor-
age arises mainly from the separation of electronic and
ionic charges at the interface between high-area electrode
material and the electrolyte solution. In the EDLC,
this charge separation distance, d, is reduced to the
Helmholtz double-layer dD thickness, which is defined as
half the diameter of the adsorbed solvated ions at the
electrode/solution interface [6].
A pilot supercapacitor has been made using commer-
cially available activated carbon (AC) material, compos-
ite RuO2 + AC and natural copper sulfide minerals as
the active electrode material. Inactive part is watered
by araldite mass. The connection of the mineral with
current supplier is achieved with conducting silver glue.
A supercapacitor prototype was made according to the
sketch in Fig. 2. Nafion◦R Membrane N 115 (5 nm thick)
(Ion Power, Inc.) played the role of separator, and it was
soaked with a chosen electrolyte.