Energy Harvesting Of Triboelectric Nanogenerator In Wind Energy And Mechanical Energy Of Human Motion

With the rapid development of global industry,the demand of human society for energy is increasing.With limited fossil energy reserves and considering the protection of the global environment,it is imperative to develop clean and renewable energy.Wind power generation has become an important part of the new energy field.However,the traditional electromagnetic generator based on the law of electromagnetic induction has complicated manufacturing process,large volume and weight,and high cost,and the later maintenance is also difficult.The triboelectric nanogenerator based on the principles of triboelectricity and electrostatic induction provides a new model,which is simple in form,durable,low cost and diverse in structure,and provides a novel solution for distributed environmental energy collection.However,the current structure of triboelectric wind turbines is mostly based on sliding friction,which will cause the wear of device materials and affect its long-term working stability,which becomes an urgent problem to be solved.In this thesis,a new type of rotating mode triboelectric nanogenerator(MA-TENG)was designed and manufactured.Through the introduction of permanent magnets,the sliding friction of the rotating mode is converted into the contact separation mode,which reduces the risk of loss of the material surface due to frequent friction.The MATENG can effectively collect wind energy and efficiently convert it into electrical energy.Under the condition that the number of parallel working subunits was 4 and the wind speed was 14.5 m/s,it had the most excellent electrical signal output.The maximum values of current,voltage,and instantaneous power reached 164 μA,183 V and 8.5 mW,respectively.By analyzing the relationship between the peak number of electrical signal output per second and wind speed of the MA-TENG,it is believed that it can also be used as a self-generating sensor for real-time wind speed monitoring.What’s more worth mentioning is that MA-TENG has excellent working stability,and its electrical signal can still maintain stable output after a long time of operation.In the thesis,a triboelectric nanogenerator(HMC-TENG)for human body mechanical energy collection(HMC-TENG)was designed.The HMC-TENG was embedded in the insole through the structural design of the elastic body,which can effectively convert the mechanical energy of the human body into electrical energy.When the thickness of the PTFE film was 0.05 mm and the mass doping ratio of silicon dioxide in the silicone rubber was 15%,the device had the most excellent electrical signal output.In addition,the experimental exploration showed that the HMC-TENG can be used as a pressure sensor within a certain pressure range,which is expected to be used to monitor the force state of the foot when the human body is walking to monitor and correct the walking posture.