Fig. 3.

Healing performance of supercapacitors based on hydrogel electrolyte. a, b Galvanostatic charge/discharge (GCD) curves of supercapacitor devices healed by irradiation with 808 nm infrared light for 10 min (a) and heating at 80 ^oC for 60 min (b) for different broken/healed cycles. The numbers 1, 5, 10, 15, and 20 correspond to the number of cycles. c Specific capacitance retention of supercapacitor devices by broken/healed for various cycles. d Comparison of the healing efficiency and cycling number of our supercapacitors with previously reported results. e, f Specific capacitance retention of a healed supercapacitor under different bending angles (e) and after 5000 bending cycles to an angle of 120° (f). g Digital photographs of four supercapacitors connected in series to power a light-emitting diode (LED) with one device being performed for cut/healed operation