Study On Aligned Carbon Nanotubes Based Fluidic Nanogenerators

With the depletion of traditional fossil energy,developing a new generation of green energy conversion and storage technology has become the key to alleviate this problem.In addition,the rapid development of mobile electronic products has led to a growing demand for sustainable and convenient power supply equipment.Nanogenerators can collect the underutilized mechanical energy in the environment and the human body and convert it into electrical energy to power electronic devices,which has succeeded in attracting attention.Based on the curving electric generation effect of carbon nanotube arrays in electrolyte solution,this work designed and prepared a fluidic nanogenerator based on carbon nanotube arrays,studied its electric generation performance and mechanism,and applied it to energy conversion and utilization,pressure sensing and motion sensing.The main contents are as follows:1.Fabrication of fluidic nanogenerators based on carbon nanotube arrays.Carbon nanotube arrays were prepared by chemical vapor deposition(CVD)method,and the carbon nanotube arrays were treated by the thermal annealing process to remove impurities and improve crystallinity.At the same time,the mechanical properties of carbon nanotube arrays were enhanced through electrostatic spinning technology.This type of carbon nanotube arrays composite electrospun membrane can be served as fluidic nanogenerators.2.Fabrication of fluidic nanogenerators performance testing device and characterization of electric generation performance of fluidic nanogenerators based on carbon nanotube arrays.The fluidic nanogenerators performance testing device mentioned in this article is fabricated by the laser cutting technique.We connected the fluidic nanogenerator(carbon nanotube arrays composite electrospun membrane)with electrode and placed it into the fluidic nanogenerators performance testing device,the energy conversion process can be realized by pushing the pushrod of the test device which is directly connected with the nanogenerator.The test device can measure various electric generation performance of the fluidic nanogenerator,the maximum open-circuit voltage was 130 mV,the maximum shortcircuit current was 5 ?A and the cycle deformation times was 1000,etc.3.Mechanism of generating electricity by curving carbon nanotube arrays.The mechanism of generating electricity by curving carbon nanotube arrays was demonstrated by combining the experimental design and theoretical simulation results,which showed that the overlapped electric double layer(EDL)in the intertube of the carbon nanotube arrays in the electrolyte solution was the main reason for electric generation.4.Applications of fluidic nanogenerators based on carbon nanotube arrays.This fluidic nanogenerator can be used in energy conversion and utilization,motion sensing and pressure sensing:(1)it can convert mechanical energy into electrical energy and light up LED lights to realize energy conversion and utilization;(2)it can monitor changes in pressure applied to the nanogenerator to realize pressure sensing;(3)it can monitor the movement of toy frogs and cocks to realize motion sensing.In general,the fluidic nanogenerator based on carbon nanotube arrays can efficiently and continuously obtain mechanical energy from the environment or human body and convert it into electrical energy,which is of great significance for energy conversion and utilization,self-powered sensing and alleviating the current energy crisis and environmental pollution.