Preparation And Research Of Triboelectric Generator Based On Nanaofiber Microstructure

With the rapid development of wearable electronic products,triboelectric generator has become a research hotspot because they can convert external mechanical energy into electrical energy for electronic products.Among them,how to prepare high-performance generators with better portability,flexibility,and wearability has become the main research direction of people.Based on this,we prepared triboelectric nanogenerator（TENG）with different structures through two experimental schemes.Option 1:The thin copper wires are evenly arranged at a certain interval on the surface of the double-conducting copper foil tape and independently designed to form a receiving device with a concave-convex structure.Take one of the receiving devices to spin polyurethane（PU）nanofibers on its surface,and take another receiving device to spin on the surface of polyvinylidene fluoride（Si₃N₄ doped PVDF）nanofibers doped with silicon nitride electret particles to obtain two types of nano-fiber membranes with a wave structure,assembled into a high-performance wave electret triboelectric nano-generator（HW-TENG）,then Characterize its appearance and test its performance.The results show that the surface nanofibers of HW-TENG closely adhere to the support material to form a concave-convex microwave-like structure.The electrical output performance of HW-TENG made of Si₃N₄doped waveform structure is about 3 times higher than that of ordinary planar membrane generators.One reason is that the nanofibers are doped with Si₃N₄ nano-electret particles to increase the surface charge of the nanofibers;the other is that the unique structure of the nanofiber membrane increases the effective contact area between the nanofiber layers.In addition,a series of application tests were carried out of HW-TENG.The results show that HW-TENG has the sensitive performance of converting mechanical energy into electrical signals and then feeding back.The output signal of multiple cycle tests maintains stable cycle stability,and the range of collected mechanical force values is wide.Finally,light the LED bulb,indicating that it has a large application potential in the conversion of electromechanical into low-consumption electronic products for energy supply.Option 2,Two kinds of PU nanofiber core-spun yarn and Si3N4 doped PVDF nanofiber core-spun yarn were prepared by using conjugated electrospinning technology with copper wire as the core yarn material,and a doped Si₃N₄ electret particle with an double-layer fabric triboelectric generator with knot structure was designed and constructed.The upper layer of the fabric is woven from Si₃N₄ doped PVDF nanofiber core yarn,which is negatively charged,and the lower layer is woven from PU nanofiber core yarn,which is positively charged.The open circuit voltage（Voc）,short circuit current（Isc）,sensitivity,washability and cycle performance of TENG prepared in this state in different states were further studied.When the external mechanical force acts,the two fabric layers are in contact friction to convert the external mechanical energy into electrical energy.The peak values of Voc and Isc are optimally 71 V and 0.7μA,and the instantaneous output electrical energy reaches 56μW.In addition,after the test generator passed 150,000 cycles,its electrical output performance was almost unchanged,which shows that the output performance will not be affected.This generator shows excellent electrical output performance,sensitivity,can collect external mechanical forces under different conditions,and has good wearability,knitability,washability,and cycle application performance.Because of its simple production method,low price,high applicability,and wide collection range,it has great application prospects in the application of power supply equipment for low-consumption electronic products.In addition,the generators are used to connect rectifiers,commercial capacitors,and LED bulbs to further study their actual application performance.This study significantly improves the output performance of TENG and greatly promotes the application performance of TENG in self-powered wearable textiles.Among them,option two is more practical wearable than option one.