Figure 3. The optical and electrochemical properties of the transparent supercapacitors based on the transparent and stretchable electrodes with one layer of CNT sheet on the PDMS substrate.

(a) A photograph of such a supercapacitor wrapped outside along a glass tube. (b) A photograph of a bended transparent supercapacitor based on the transparent electrodes with one layer CNT sheet. (c) Transmittance spectra of one layer CNT sheet on PDMS substrate and its derived supercapacitors with different assembled configurations. (d) Cyclic voltammetry curves of the supercapacitors at a scan rate of 0.1 V s⁻¹. (e) The galvanostatic charging-discharging curves of the supercapacitors at a constant current density of 0.25 A g⁻¹ for the parallel assembly and 0.23 A g⁻¹ for the cross assembly. (f) Dependence of specific capacitance of devices on the discharging current density for both types of devices. (g) Ragone plots of the both types of supercapacitors.