Triboelectric Nanogenerators And Their Applications

With the gradual aggravation of energy crisis and environmental problems,as well as the power supply demand of smart electronic devices with portable and miniaturized development goals in the future.Human beings need a new energy technology that can realize continuous power supply,is not limited by volume,and is clean and pollution-free.Nanogenerator(NG)is a brand-new miniature energy conversion device,which can continuously collect various discrete mechanical energy in the environment,and convert the energy into electric energy to drive electronic equipment,thus realizing efficient energy conversion triggered by low-frequency machinery.More importantly,the nanogenerator has low cost,easily available raw materials,and will not damage the environment in the working process,so it is an environment-friendly device that can be applied on a large scale.Therefore,the appearance of nano-generator has attracted the attention of researchers.In this study,based on the triboelectric nanogenerator(TENG),starting from theoretical analysis and taking practical application as the ultimate goal,a series of works have been carried out,as follows:1.In order to deepen the understanding of TENGs core physics,based on the original theoretical analysis,TENGs physical model is analyzed and the equivalent circuit is built,and the actual physical significance of power generation process is expounded.2.To solve the problems of impedance mismatch between TENG and electronic devices and low energy transfer efficiency,the power management circuit design of TENG is optimized,and the existing power management mechanism of TENG is perfected through series switch structure,DC buck conversion circuit and autonomous switch design,and the energy transfer is maximized.3.Considering the problem of dust hazard in blackboard teaching mode,using the high-voltage performance of TENG,the application of electrostatic dust removal was launched,and the principle of TENG was applied to teaching blackboard eraser,which effectively suppressed the flying of chalk dust and improved the teaching environment for teachers and students.4.Aiming at the problem of energy shortage and sustainable power supply of electronic devices,the energy storage application of TENG was explored,and a high-performance flexible battery was made by ourselves,which verified the feasibility of the power supply mode of “TENG-lithium battery-electronic devices”,and had certain reference value for alleviating the energy crisis.5.Finally,TENG is applied to self-powered motion sensing,and an intelligent insole based on TENG is prepared,which can effectively recognize human gait signals and has potential applications in sports training,medical care monitoring,clinical gait analysis and rehabilitation evaluation.