Flexible Hybrid Triboelectric Nanogenerator Based On Common Electrode

With the developing progress of economy and science and technology,the demand for energy in the development of human society is also increasing.From obtaining energy in the period of the primitive man for wood fire to the large-scale use of coal and oil after the first industry,the relationship between human and energy is becoming closer,while it is also tenser at the same time.According to the estimates of energy scientists,less than 2 trillion barrels of oil have not been exploited on the planet,which is less than 95 years of human use.As energy security is closely related to economic security and political security,survival of the human life will be threatened if traditional energy is exhausted.Facing the current situation of the depletion of traditional fossil energy,researchers around the world start to search for alternatives to traditional fossil energy and build new energy system to provide protection for the long-term survival of mankind on the earth.At present,wind energy,solar energy,thermal energy and nuclear energy in nature have been paid attention to by researchers and successfully applied to people’s daily life,gradually forming a multi-dimensional energy structure.In addition,electronic technology is also promoting the development of mankind,more and more small wearable electronic devices come into people’s life,playing an irreplaceable role in various fields.However,most of the power supply mode of electronic equipment is traditional chemical batteries.Because of the limited life of chemical batteries,they need to be replaced or charged frequently,which brings many limitations to users.At the same time,heavy metals in chemical batteries are easy to cause environmental pollution and endanger human health.Therefore,it is a challenging task to find an environment-friendly device that can collect micro-energy in nature.In 2012,Zhonglin Wang from Georgia Institute of Technology first proposed triboelectric nanogenerator based on the principle of coupling between contact electrification and electrostatic induction.Depending on the difference in the energy attracted by the two contact materials to the charge,the contact interface produces equal amount of different frictional charges when the materials contact.Due to the principle of electrostatic induction,the induced charges are formed at the back electrodes,and the potential difference between the two materials is formed.The electrons are driven by the potential and flow between the electrodes to form a current by the external circuit.With the development of research on triboelectric nanogenerator,there are four basic modes of triboelectric nanogenerator: vertical contactseparation mode,sliding mode,single-electrode mode and freestanding-triboelectric mode.Triboelectric nanogenerator has become a very promising functional equipment because of wide selection of materials,simple preparation process,high output performance and good biocompatibility.At the same time,because of its high sensitivity and small size,it can be used as a self-powered sensor and has a wide application prospect in health monitoring and biomedical fields.Aiming at the application requirement of power supply and human mechanical energy acquisition for wearable devices as motion attitude monitoring and motion sensing,the mathematical model of triboelectric nanogenerator is deduced based on Maxwell current theory.A flexible arched triboelectric nanogenerator based on common electrode based on common electrode structure is fabricated by using room temperature vulcanized silicone rubber,epoxy resin and flexible electrodes.Firstly,the material properties were tested,and the effect of surface structure on the performance of triboelectric nanogenerator was discussed.In order to demonstrate the electrical performance of triboelectric nanogenerator,the output current,output voltage and capacitance charging curve of the generator were tested with Keithley 6514 digital source meter.Finally,the application of the triboelectric nanogenerator is discussed.It can light up the light-emitting diodes and it can be used for attitude recognition and motion sensing when placed at the joint and foot of the human body.Through experimental analysis and discussion,it is proved that the flexible arched triboelectric nanogenerator based on common electrode based on common electrode structure has the advantages of high output performance,good reliability and excellent biological function,which can be wide applied in the field of human motion energy collection,wearable electronic equipment power supply and motion monitoring and sensing.