New Mode And Improvement Of Porousstructural Triboelectric Nanogenerator

With the arrival of the fourth industrial revolution based on the Internet of Things,wireless sensor networks and artificial intelligence,there is a huge demand for massive,distributed,miniature wireless power.Mechanical energy is the most widely distributed form of energy,and nanogenerators to meet these needs have great prospects.And with its clean,environmentally friendly,flexible and easy to integrate characteristics for many scholars to study.Triboelectric nanogenerator is a generator which combines the principle of triboelectric and electrostatic induction.Its theoretical basis is derived from the displacement current in Maxwell’s equations.It can convert the weak mechanical energy widely distributed in human society into electrical energy.It has the advantages of simple structure,simple manufacture,clean and so on,and has a very broad research prospect.At present,there are four operating modes of triboelectric nanogenerator,namely,vertical contact-separation mode,relative sliding mode,single electrode mode,and independent tribolayer mode.The four modes have a common structure,namely the separation of the triboelectric layer,which makes the working conditions of the triboelectric nanogenerator greatly constrained.In this paper,we propose a new working mode,which is derived from the vertical contact-separation mode,but the friction layer is not separated,so that the working range of the friction nanogeros is wider.By preparing a porous structure PDMS,we use the friction of the hole wall to form a single vertical contact-separation mode generator.A porous structure generator is integrated with many small generators.At the same time,we propose two improvement methods to increase the surface charge density and then increase the output of the generator.In the process of preparation of porous structure,metal particles adhesion on the hole wall surface,the vertical contact-in this tiny holes separation mode generator through introduction of the metal particles of low electronegativity,conducive to the PDMS emitting electronegative materials of hole wall in the friction process,the gain and improve friction charge production,which in turn improve the output performance.At the same time,after immersing the magnetic metal particles,the magnetic field is applied to adjust the orientation of the magnetic metal particles,so that the highly electronegative PDMS material and the low electronegative metal particles in the hole are distributed in different directions,which reduces the mutual offset of the friction charges caused by the disordered distribution,improves the net friction charge production,and then improves the output performance.This work proposes a new working mode of triboelectric nanogenerator,which has the advantages of simple structure,integrated friction layer and wide working range.On the basis of the above,the improvement scheme is proposed.According to the principle of increasing the surface charge density,the output performance of the generator is further improved by the immersion of metal particles and the external orientation.At the same time,the improvement scheme of external magnetic field adopted by us has the advantages of simple operation and low cost.