Figure 8.

Wearable triboelectric nanogenerators based on nanosheets

(i) Optical images and output as the function of voltage responses to the repeated bending/relaxation of the triboelectric nanogenerator that was attached onto the (a, b) index finger, (c, d) knuckle, and (e, f) wrist, respectively (Lim et al., 2017a).

(ii) Output voltage of stretchable triboelectric nanogenerator with the size of 1 cm × 2.5 cm. (a) Output VOC of stretchable triboelectric nanogenerator at various forces under a fixed 10 Hz frequency. (b) Output VOC of stretchable triboelectric nanogenerator at distinct frequencies under a fixed force of 10 N. (c) Voltage and current output under various load resistances related to stretchable triboelectric nanogenerator. (d) Output power density under different resistances of the external loads (Lan et al., 2019).