Recent Progress in Triboelectric Nanogenerators as a Renewable and Sustainable Power Source

Figure 13

(a) Schematic showing the structure of hybrid energy cell [68]. (b) Schematic illustration of the bridge rectification circuit. (c) Output voltage of the Si solar cell. (d) Rectified output voltage of the TENG. (e) Output voltage of the hybrid solar cell and TENG. (f) The hybrid energy cell charging and discharging curves of a Li-ion battery. (g) A Li-ion battery of a cell phone charged by the hybrid energy cell.