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Zhang et al. Soft Sci. 2026, 6, 16 Page 13 of 17
Figure 5. Electrochemical characteristics of the flexible supercapacitor based on the C-3 electrode: (A) CV curves at various applied
voltages for optimization of the voltage window; (B) CV curves at different scan rates; (C) GCD curves at different current densities; (D)
Coulombic efficiency and cycling performance; (E) Nyquist plots and fitting curves before and after 8,000 GCD cycles; (F) Ragone plot.
CV: Cyclic voltammetry; GCD: galvanostatic charge-discharge.
Figure 6. Practical applications of the flexible supercapacitor based on the C-3 electrode: (A) Bending fatigue test; (B) corresponding GCD
curves under different bending cycles; (C) GCD curves under different bending angles; (D) powering a multifunctional timer; (E) powering
a baby’s toy. GCD: Galvanostatic charge-discharge.
including powering a multifunctional timer and a baby’s toy. The discharge process and detailed operating
time are provided in the Supplementary Video. The supercapacitors reported here show strong potential for
use in flexible electronics, such as power supplies for gas sensors or energy storage units for
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nanogenerators .
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