Electrochemical measurements
The electrochemical measurements of the fabricated MXene/AAC //activated
carbon asymmetric supercapacitor were implemented in 7 M KOH aqueous
electrolyte in a three-electrode cell at room temperature. The power
density (P ) and energy density (E ) of the asymmetric
supercapacitors were calculated according to the following
equation10, 11:Cm = (I△t )/ (M△V ) (3)E = (Cm△V 2)/ 2
(4)
P = E/△t (5)
Where Cm is the specific capacitance of MXene/AAC
//activated carbon asymmetric supercapacitor (F g-1)
and M is the total mass of active materials on both electrodes,I is the discharge current (A), △t is the discharge time
(s), △V is the potential window during the discharge process
except the ohmic drop (V). P is the power density and E is
the energy density of the asymmetric supercapacitors.