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.