Supercapacitor Fabrication
The MXene doped ion-conducting polymer electrolyte layer (having maximum
conductivity) placed between two designed r-GO symmetric electrodes, and
the device’s performance was determined using an electrochemical
workstation analyzer (CH640D). Active electrodes based on non- porous
carbon (area 1x1cm2) graphite sheets is used as a
current collector. These carbon electrodes were then finally dried in
the vacuum oven overnight at 80oC. As an active
electrode material for 1 cm2 area of current
collector, we used generally 1 mg of paste of nonporous carbon.
Result and Discussion
Conductivity Measurement
To determine the bulk electrical conductivity of the polymer electrolyte
sheets, complex impedance spectroscopy was performed. To perform
experiment, we have sandwitched polymer electrolyte films in between two
stainless steel electrodes and then sample holder was connected to EIS
measurement (CH640D) in between frequencies 100Hz to 1mHz.
To evaluate ionic conductivity values, we have used equation (1):
\(\sigma=G\frac{l}{A}\) (1)
where \(\sigma\) is the specific conductivity, G is conductance i.e.,
G=1/Rb where Rb is the bulk resistance,l is the thickness of the film and A is the area of the
polymer film covered by electrodes.