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Sensors 2020, 20, 506 11 of 14 Sensors 2020, 20, x FOR PEER REVIEW 11 of 14 the output performance of the generator starts from reducing the power consumption of the rectifier bridge and ensures the phase synchronization of the integrated TENG output, which reduces the bridge and ensures the phase synchronization of the integrated TENG output, which reduces the internal resistance of the friction layer. internal resistance of the friction layer. 3.6. Charge and Discharge Test 3.6. Charge and Discharge Test Different number of cellulose based nano-generators is used to supply power to the 47 μF capacitor, Different number of cellulose based nano-generators is used to supply power to the 47 μF and the charge and discharge performance in 1000 s was tested. The first 500 s is used for power capacitor, and the charge and discharge performance in 1000 s was tested. The first 500 s is used for supply, and the power-down characteristics are observed after 500 s to facilitate the design of the power supply, and the power-down characteristics are observed after 500 s to facilitate the design of subsequent energy storage circuit. Figure 9a,b,c are based on the Cel, Cel + PVDF + BaTiO3 friction the subsequent energy storage circuit. Figure 9 a,b,c are based on the Cel, Cel + PVDF + BaTiO3 friction layer, assembled single, two, four TENG charge and discharge patterns. It can be seen that the charging layer, assembled single, two, four TENG charge and discharge patterns. It can be seen that the charging peak of a single Cel-based friction layer generator in the 500 s reaches 1.965 V, and the power is reduced peak of a single Cel-based friction layer generator in the 500 s reaches 1.965 V, and the power is reduced to 1.672 V, and the power failure rate is 14.91%. The charging peak value of the Cel + PVDF + BaTiO3 to 1.672 V, and the power failure rate is 14.91%. The charging peak value of the Cel + PVDF + BaTiO3 friction layer generator reaches 3.114 V, and the power is reduced to 2.628 V, and the power failure friction layer generator reaches 3.114 V, and the power is reduced to 2.628 V, and the power failure rate rate is 15.61%. The charging peak of two Cel-based friction layer generators reaches 2.554 V, and the is 15.61%. The charging peak of two Cel-based friction layer generators reaches 2.554 V, and the power power is reduced to 2.177 V, and the power-down rate is 14.76%. The charging peak value of the Cel + is reduced to 2.177 V, and the power-down rate is 14.76%. The charging peak value of the Cel + PVDF PVDF + BaTiO3 friction layer generator reaches 3.840 V, and the power is reduced to 3.254 V, and the + BaTiO3 friction layer generator reaches 3.840 V, and the power is reduced to 3.254 V, and the power power failure rate is 15.26%. The charging peak of four Cel-based friction layer generators reaches failure rate is 15.26%. The charging peak of four Cel-based friction layer generators reaches 1.291 V, and 1.291 V, and the power is reduced to 1.098 V, and the power-down rate is 14.69 %. The charging peak the power is reduced to 1.098 V, and the power-down rate is 14.69 %. The charging peak value of the value of the Cel + PVDF + BaTiO3 friction layer generator reaches 1.903 V, and the power is reduced Cel + PVDF + BaTiO3 friction layer generator reaches 1.903 V, and the power is reduced to 1.612 V, and to 1.612 V, and the power failure rate is 15.18%. According to the test results, compared with the the power failure rate is 15.18%. According to the test results, compared with the single TENG charge single TENG charge and discharge, the two TENG charging rates and peaks are improved at the same and discharge, the two TENG charging rates and peaks are improved at the same time. The charging time.ThechargingpeaksbasedontheCel,Cel+PVDF+BaTiO frictionlayerincreasesto129.96% peaks based on the Cel, Cel + PVDF + BaTiO3 friction layer i3ncreases to 129.96% and 123.33%, and 123.33%, respectively. Four TENG charging rates and peak values are significantly reduced by respectively. Four TENG charging rates and peak values are significantly reduced by 49.46% and 49.46% and 50.45%, respectively. This corresponds to the open circuit output voltage after assembly 50.45%, respectively. This corresponds to the open circuit output voltage after assembly in the in the previous test. In addition, for TENG consisting of the same friction layer, the power-down previous test. In addition, for TENG consisting of the same friction layer, the power-down rate of rate of TENG after twice and four times charge is basically the same. Among them, the combined TENG after twice and four times charge is basically the same. Among them, the combined power- power-down rate has decreased, indicating the stability of multiple combined TENG. The offset rate down rate has decreased, indicating the stability of multiple combined TENG. The offset rate also also ensures subsequent powering of the MCS-52 microcontroller, which in turn drives the SFM-27 ensures subsequent powering of the MCS-52 microcontroller, which in turn drives the SFM-27 buzzer baulzazremr alnadrmilluanmdinilaltuems tihneat1e6s0t2heLC16D0.2 LCD. FiFgiguurere99..Charging and discharrgiinggppeerfroformrmanancecetetsetsotfodfidffieffrenretntunmubmerbseorsf forficftriiocntiolanyelarsy:e(ras):s(ian)gslein, (gbl)e, (btw) tow(oc)(fco)ufro.ur. 4. Conclusions 4. Conclusions In summary, this paper proposes an environmentally-friendly triboelectric- piezoelectric In summary, this paper proposes an environmentally-friendly triboelectric- piezoelectric nano- nano-generator based on degradable cellulose, which utilizes cellulose that can be extracted from many generator based on degradable cellulose, which utilizes cellulose that can be extracted from many natural vegetation sources and organisms. By utilizing the characteristics of cellulose-IL dissolution natural vegetation sources and organisms. By utilizing the characteristics of cellulose-IL dissolution regeneration, regenerated cellulose film is obtained as a friction and piezo-layer. Then, it is assembled regeneration, regenerated cellulose film is obtained as a friction and piezo-layer. Then, it is assembled with a PTFE film to form TENG that generates electricity by extrusion friction, and tested for electrical with a PTFE film to form TENG that generates electricity by extrusion friction, and tested for electrical oouutptpuuttpproroppeerrtiteiess..Therresulltsshow that the peak value of open circuit outputtvollttageeiinccrreeaasseessbbyy 2.25.4544titmimeesstoto2200.1.1555V,,aannddththeeppeeaakkvaallueoffshortcircuitoutput currentincreasesby5..480ttiimeesstoto 6.60.0101μμAA. .AAftfeterrtwtwooaassseembblileiess,,ttheopen--ciircuitoutput voltage is increasedtoamaxiimumvvaalulueebbyy 1.321 times, and the short-circuit output current peak is increased to a maximum value by 1.161 times. After four assemblies, the open circuit output voltage and short circuit output current are greatlyPDF Image | Green Triboelectric Nano-Generator Composite of Degradable Cellulose, Piezoelectric Polymers of PVDF PA6
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