Design And Application Of The Triboelectric Nanogenerator With Coplanar Electrode

With the further development of science and technology,the energy crisis is getting worse.The triboelectric nanogenerator(TENG)has advantages of simple structure,low cost,and good performance.It can collect energy around the environment and convert it into electrical energy.It has important application prospects in the fields of portable power generation devices and self-powered sensors.The contact area and the difference in electronegativity are important factors that affect the output of the TENG.This article innovatively proposes a triboelectric nanogenerator with coplanar electrodes(C-TENG),and improves the output performance by increasing the contact area through the microtexture of surface.The main content and innovative results are as follows:(1)A triboelectric nanogenerator with coplanar electrodes(C-TENG)has been designed.The C-TENG was prepared with Ecoflex00-30 silicone rubber as the friction layer and Ecoflex00-30@CNT@CB as the conductive layer.The C-TENG can work in folding-separation mode by folding itself.It can also work in contact-separation mode when the C-TENG contacts with other objects.The working principles of the two modes were analyzed based on the principles of triboelectric charging and electrostatic induction,respectively.The electrical performance of the C-TENG was simulated by COMSOL software.Through the simulation,we found that the potential between the two plates changed positively with the separation distance,and results of the simulation were consistent with the theoretical analysis.(2)The performance tests of C-TENG under two working modes were conducted,respectively.When the C-TENG worked in folding-separation mode,its output voltage and output current reached to 197 V and 10.4μA,respectively.With the increasing of external frequency,its output voltage and output current also increased,but amount of charge transferred in one cycle was almost unchanged.When the C-TENG worked in contact-separation mode with other objects,the output voltage and output current reached to 186 V and 18.2μA,respectively.The output voltage and output current increased with the increasing of the size of the basic unit,but the surface charge density of the C-TENG was almost unchanged.When the external load was 10 MΩ,its peak surface power density can reach to 0.704?8)~2.The C-TENG can directly light up dozens of LED lights under different deformation such as stretching,folding and twisting,and it has a wide application prospect in some occasions requiring deformation.(3)The microtexture of the sandpaper surface was transferred to the surface of the friction layer by hot stamping method.Based on this friction layer,the C-TENGs with microtexture have been prepared.Through comparison,it was found that the microtexture of the sandpaper surface was successfully transferred to the surface of the friction layer.The output performance of C-TENG prepared by sandpaper with 5000#reached to the highest,which output voltage and output current reached to 589 V and 56.9μA,respectively.The output performance of the C-TENG was stable after 60 minutes of continuous working.Based on the C-TENG,a self-powered gesture sensor was prepared,which can be used to detect different gestures.A self-powered motion sensor was also prepared,which can detect different motion states of the human body including walking,racing and running.These results show that the C-TENG can be widely used in portable and wearable devices.