| In today’s society with information high-speed developed, the business models and technology with the feature of move, real-time and intelligence are subtly driving. And then new challenges are presented on the global energy system, mobile energy with the supply model of mobile, all-weather, high efficiency will define a new chapter to energy demand. Many types of mobile and distributed generation technologies are rising in the modern world, and one of them is the nanogenerator(NG) based on piezoelectricity,pyroelectricity, triboelectricity and electrostatic induction. It can collect the energy from the environment, and then drive the wireless mobile electronic device by the energy conversion to achieve energy supply. For the reason of the NG having potential applications in the field of self-powered system and needing further discussion, in this paper, the flexible NGs based PDMS composite films were studied, the main contents of this paper can be summarized as follows:1 PDMS@GPs composite film was synthesized, the output current, voltage and power of this film based TENG are systematically investigated and comparative analyzed under different conditions. We find that in fact, the NG both acts as an energy storage and output device. A larger capacitance value of the NG can achieve higher charge density on the polymer surface. It is demonstrated that GPs with sizes of 20-40 nm and 3.0% mass mixed into the PDMS can reduce 34.68% of the effective thickness of the dielectric film and increase the surface charges by 111.27% on the dielectric film.The output power of the TENG with the composite PDMS film is 3.7 W/m2, which is2.6 times as much as that of the pure PDMS film. With the advantages of high output power, good stability, biocompatibility, good durability and integrability, the NG has wide application prospects in the fields of flexible sensors and biological devices.2 Based on the Zn O aggregates with the size of 500 nm which was synthesized by hydro-thermal method and PDMS, the PDMS@Zn O composite film was synthesized by the method of Doctor Blade Technique, then the nest-like porous PDMS thin films with surface and inner patterned were obtained by hydrochloric acid etching. And combined the PET based graphene transparent electrode, the flexible and transparent TENG was fabricated. We find that the best mass doping of Zn O is 25% after theanalysis and comparison of NG based on PDMS composite films with different Zn O mass doped. The maximum current of the FT-TENG is 7.8 μA(1.95 μA/cm2), the maximum voltage reaches 271 V, the maximum output power can reach 0.39 m W, the maximum surface charge density can reach 9.8 n C(2.45 n C/cm2), and the mechanism of enhanced electrical properties were analyzed and summarized. By increasing the surface roughness of the composite film to increase the friction, but also by direct reduction of the effective thickness of the dielectric layer to increase the capacitance of the device,thereby increasing the surface charge density of the film, then to enhance the output power.3 The FT-TENG based on nest-like porous PDMS film and graphene electrode was applied to the speed-weight sensor, this sensor can be used to determine both the speed and the weight of the driving object, the peak output current can characterize weight, and spacing between the peaks can indirectly characterize the speed, while the electric energy generated by the sensor can be stored in the electric energy storage device to drive the sensor’s circuit system. Therefore, the speed and weight of the moving objects can be measured respectively and simultaneously, there is a wide range of applications in electronic traffic speed measurement and weight measurement. |
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