Design Of A Novel DC Triboelectric Nanogenerator And Its Application In Electrospinnin

With the development of scientific progress,the information age has gradually entered our life,which means that the demand for energy will gradually increase,leading to an endless stream of energy problems.The main energy problem is the depletion of fossil fuels.On the other hand,the burning of fossil energy will cause irreversible harm to the earth’s environment.In order to avoid these problems and match the development of the information age,it is essential to find a new form of energy.Compared with the burning of fossil energy,mechanical energy in daily life has many advantages,such as wide distribution and diversified forms.Triboelectric nanogenerator（TENG）is a kind of device for collecting mechanical energy in environment and daily life.It mainly uses the redistribution of electron cloud and the principle of electrostatic induction to convert the collected mechanical energy into electric energy.However,the signal output characteristic of most traditional triboelectric nanogenerator is AC pulse signal.Due to the characteristic of AC output,the device cannot achieve functions in some fields.The AC output makes the TENG require a rectifier to obtain the direct current（DC）output,taking away its portability advantage and reducing its energy efficiency.Secondly,the pulse output produces a high crest factor,and the pulse output pattern leads to the output instability.Therefore,in this case,DC triboelectric nanogenerator（DC-TENG）with efficient and constant DC output and low crest factor is preferred.In order to solve the problem of low current density and complex management circuit,the DC-TENG based on friction effect comes into being.Here,we prepared two kinds of DC-TENG.Firstly,a new working mode of DC-TENG is designed here,which is composed of two rollers,one rubber skin and two metal electrodes.In the process of rotation,the relative sliding between the roller and the rubber belt causes the accumulation of positive and negative charges on the roller,so that the corona discharge between the roller and the electrode makes the electrons always flow in the same direction in the external circuit.Dc output is realized.The DC output up to 8 k V voltage and 5μA current can be obtained at3000 rpm,which is several times or even tens of times higher than the output of other DC triboelectric nanogenerator.By adjusting different speeds to obtain different amounts of power to drive different electronic devices.Using the high voltage DC characteristics of the DC-TENG,the device can be used as a high voltage power source for electrospinning to prepare different nanofibers.The DC-TENG can be used as a direct current power source,successfully lighting up about 4,000 diodes,as well as charging capacitors to store energy and lighting up hygrometers.This work proposes a new type of DC triboelectric nanogenerator,which successfully realizes DC output and collects mechanical energy in the environment to convert it into electric energy.All the above experiments can prove that DC-TENG can provide practical applications in the field of high voltage electrostatic,energy supply and so on.Secondly,a sliding DC triboelectric nanogenerator based on silicon wafer is prepared by using a new physical phenomenon,the friction volt effect.Study on the introduction of two-dimensional layered material WS₂ into DC triboelectric nanogenerator.By comparing the signal output under vertical contact separation and sliding friction,it was found that DC output was generated under sliding friction due to friction volt effect.In this paper,the structure and working mode of two kinds of DC triboelectric nanogenerator are presented,and the output principle of the two kinds of triboelectric nanogenerator is expounded,which provides a new idea for the development and exploration of DC triboelectric nanogenerator.