Research On Preparation And Electrical Performance Of Tribo Nanogenerator Based On Modified Polyimide Film

Energy is an essential material for human life.Fossil energy is mainly used now,such as oil,natural gas,coal and so on.However,due to environmental pollution,high cost,and shortage of energy materials,various factors have restricted the greater development of fossil energy.So scientists began to seek a green,environmentally friendly,miniaturized and pollution-free energy source.With the research of scientists,Wang Zhonglin’s team invented the friction nanogenerator,which is gradually solving the above problems.At present,the commonly used materials for triboelectric nanogenerators（TENG）are generally commercial materials,and there is great room for improvement in performance,and it is necessary to conduct further research on them.This subject mainly consists of two works.First,a novel method is proposed to improve the output performance of TENG by introducing an electron trap into the friction layer.For this purpose,amino-modified reduced graphene oxide（FRGO）embedded in the friction layer is used as an electron catcher.Firstly,the performance of triboelectric nanogenerator based on amino-modified reduced graphene oxide（FRGO）modified polyimide（PI）film was studied,using different ratios of p-phenylenediamine（PPDA）to modify graphene oxide,And then reduced with ascorbic acid（LAA）to prepare amino-modified reduced graphene oxide（FRGO）,using FTRI,SEM,TEM,XRD,XPS,etc.For the best.The proportion of FRGO was characterized.Then,FRGO/PI films with different contents（0.05%,0.1%,0.5%,1%）were prepared,which was used as the negative electrode friction layer to prepare vertical contact separation type TENG to test its electrical properties.At the same time,FIRI was used for PI/FRGO film characterized,using 6514 electrometer to characterize the voltage,charge,and current of the TENG prepared by the thin film at different frequencies of 1-5 Hz.The experimental results show that when the frequency is 5Hz,PPDA:RGO=1:1,and the amount of FRGO added is 0.1%,the output performance is maximum,the voltage is 58V,the charge is 33n C,and the current is 12μA,which is about TENG made of pure PI film.2 times the output performance.When the load is 10MΩ,the maximum power density is 3.5 W/m²,which is 7 times the maximum power density of TENG made of pure PI film.After that,the output performance of FRGO/Ba Ti O₃ modified PI film as TENG was further studied.First,the reduced graphene oxide modified by p-phenylenediamine was mixed with barium titanate modified by the silane coupling agent to prepare composite nanoparticles,and the amino-modified reduced graphene oxide was prepared,accounting for0.05%,0.1%,0.5%,1%nanocomposite fillers,and the FRGO/Ba Ti O₃ composite particles at the optimal ratio are characterized by FTRI,TEM,XPS analysis,etc.At the same time,nanocomposite films with 5%,10%,15%,and 20%added were prepared.TENG was prepared in the same way as above,and Cu was used as a positive friction layer to prepare contact separation TENG,and its output electrical performance was tested,using 6514electrostatic The meter has characterized its electrical performance at different frequencies of 1-5 Hz.The experimental results show that:when adding FRGO composite nanoparticles with a proportion of 0.1%and adding 10%in the film,the prepared TENG has the best output performance,with a voltage of 78V,a charge of 42n C,and a current of 15μA,which is about The output performance of TENG made of pure PI film is three times that of the maximum power density of 4.9 W/m² when the load is 10MΩ,which is 10 times the maximum power density of TENG made of pure PI film.Studies have shown that:The amino-modified reduced graphene oxide nanoparticles are embedded in the polyimide film as electron traps,using Maxwell’s displacement current principle and the miniature capacitor model,which can significantly increase the charge density and storage capacity of the film,and improve the frictional nanopower generation Machine performance.The performance of nano generators.Combining Ba Ti O₃ and FRGO to prepare FRGO/Ba Ti O₃ composite nanoparticles,exerting their synergy,can further improve the performance of the friction nanogenerator based on the PI composite film.