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. 2023 Sep 26;16(19):6405. doi: 10.3390/ma16196405

Figure 4.

Figure 4

(a) TCO-HG composed of rotational triboelectric nanogenerator (TENG) and piezoelectric nanogenerator (PENG)/TENG hybrid generator; (b) open-circuit voltage and (c) closed-circuit current output of the TCO-HG with the rectifier circuit; reprinted from [80] with permission from research. (d) Schematic diagram of the TPENG structure; the voltage (e) and transferred charge (f) for the TPENG with point contact and without point contact under certain pressure by COMSOL software package (https://cn.comsol.com/); reprinted from [81] with permission from Elsevier. (g) The schematic illustration of S-TEHG; (h) rectified voltage and (i) current output; reprinted from [82] with permission from Elsevier. (j) Schematic illustration of the local view of the HEHD, which mainly consists of TENGs and EMGs as well as the commercial SCs; (k) the corresponding relationship between the VOC, ISC, and wind speed of the TENG 1; (l) dependence of the VOC and ISC of the EMG 1 on the wind speed; reprinted from [83] with permission from Elsevier.