Figure 4.

Electrical and electrochemical measurements of fabricated TTO hybrid structure electrode. a) Cyclic voltammetry curves of the oxidized Ta₄C₃T _x MXene electrode and b) TTO hybrid structure electrode at different scan rates in PVA/H₃PO₄ solid electrolyte after 10 000 cycles of the two‐electrode experiment. c) The galvanostatic charge/discharge (GCD) curves of the oxidized Ta₄C₃T _x MXene electrode and d) the TTO hybrid structure electrode. e) Specific capacitance for both electrodes and volumetric capacitance of TTO hybrid structure electrode at different scan rates and f) different specific currents. g) The Nyquist plot of the oxidized Ta₄C₃T _x MXene electrode and TTO hybrid structure electrode. The inset shows the electrical equivalent circuit. h) CV curve of the TTO hybrid structure electrode at 100 mV s⁻¹. The pink and blue areas show the direct contributions of the capacitive and diffusion mechanisms respectively. i) Capacity contribution from capacitive and diffusion‐controlled kinetic processes at different scan rates for the TTO hybrid structure electrodes.