Design And Experimental Research Of High Performance Output Triboelectric Nanogenerator

With the proposal of carbon peaking and carbon neutrality goals,vigorously developing new energy is the best approach to achieve this.Up to now,the technologies related to the development of new energy include electromagnetic,piezoelectric and triboelectric nanogenerators,etc.However,it is difficult to harvest environmental energy efficiently because of its low frequency,disorder,wide distribution and other high entropy features.Triboelectric nanogenerator has attracted wide attention because of its excellent energy harvesting and output characteristics in low-grade environmental energy.To solve the common bottleneck problem of limited output performance of triboelectric generators in the process of natural environment energy harvesting,two kinds of high-performance output triboelectric generators for different application scenarios are proposed in this paper based on the charge clamping strategy and the principle of phase coupling.Firstly,the related theories of mechanism about charge accumulation,storage and transfer of high performance output triboelectric nanogenerator based on Maxwell equations and node method is analyzed and deduced.The circuit,motion structure and other parameters of charge clamping triboelectric nanogenerator and the action law of different phase and groups of the direct current triboelectric nanogenerator with constant output on the output characteristics are revealed to form the design theory and method of high performance output triboelectric nanogenerator.Secondly,combined with the above theoretical methods,by analyzing the motion characteristics of the mechanical structure of triboelectric nanogenerator and the output waveform characteristics of the power-generation unit,the coupling relationship between the motion structure unit and the power-generation unit is determined.The mechanical and electrode structure parameters of nanogenerators are determined by the finite element simulation analysis,and the charge clamping triboelectric nanogenerator with greatly improved output performance and the direct current triboelectric nanogenerator with constant output by the phase coupling principle are developed.Finally,the matching relationship between parameters and output performance of triboelectric nanogenerator is explored.The stability of waveform output is systematically studied,and the commercial temperature and humidity sensor is successfully powered,which realized the stable and efficient output of the generator.The experimental results show that the integrated device based on charge clamping strategy can achieve the output of 1300 V,110 ?A,1.01 ?C and 25.96 m W,and drive about500 LEDs and commercial hygrometers under the simulated wind environment within 5m/s.In addition,in terms of the direct current triboelectric nanogenerator with constant output,as the number of phases and groups increase,the crest factor of current decreases,and the charging efficiency of the capacitor increases significantly.Among them,the crest factor of 3P5 G prototype is 1.08,which realizes almost constant direct current output.Compared with the 1P3 G prototype,the capacitor charging efficiency has increased by three times,and 3P5 G prototype can continuously supply power for small sensors.A novel method for efficient energy harvesting in natural environment is proposed in this paper,which will have important reference significance for promoting the application and development of triboelectric nanogenerators.