(B) TENG network collects wave energy and drives water body temperature measurement. (C) Rectified short-circuit current output from three TENG networks. (D) Three TENG networks. For 11.2 micro-capacitance Charging performance.
The ocean accounts for about 71% of the total area of the earth, which contains extremely rich energy. The ocean energy mainly exists in five forms: wave energy, tidal energy, sea current energy, salt difference energy, temperature difference energy, etc. Among them, The world's total reserves are estimated to reach 2 billion kilowatts or more as a clean and pollution-free energy potential, large-scale development and utilization of wave energy or have a significant impact on the world's energy consumption patterns.Existing based on electromagnetic generators However, it is also facing the problems of complex structure, low reliability and high power generation cost. After decades of research, there is still a lack of technology for large-scale commercial development. Chinese Academy of Sciences , And Triboelectric Nanogenerator (TENG) technology proposed by Wang Zhonglin, director of Beijing Institute of Nano Energy and Systems, Chinese Academy of Sciences, provides a new technological path for the development and utilization of wave energy.Friction nanogenerators based on Maxwell's displacement current principle, Coalescing with electrification and electrostatics induces the efficient conversion of irregular, low-frequency mechanical motion into electrical energy without the need of Miscellaneous institutions, with a variety of material selection, low cost, flexible device structure, etc. The use of TENG network to collect large areas of the wave energy, the irregular low-frequency wave motion efficiently into electricity, will likely become a very promising Waves can collect and utilize programs.
Recently, the research team led by Wang Zhonglin successfully achieved the wave energy collection by coupling friction nano-generator network for the first time and greatly enhanced the working efficiency of TENG in real wave environment through the coupling of units in the mesh-type TENG network. Based on UV-modified silica particles doped with micro-particles, a high-performance TENG cell was constructed to achieve a large increase of charge amount, a sensitive response to micro mechanical disturbance and a good durability. Under low frequency sinusoidal excitation, the peak power of a single TENG cell Up to 1.28 milliwatts with an average power of 0.3 milliwatts.On the basis of cell optimization, a 4 × 4 array of 16 spherical TENG cells was constructed and the rectified single output charge amounted to 2.14 microseconds, and at low frequency excitation The output peak power of 5.93 milliwatts and the average power of 2.04 milliwatts.Through the real wave environment experiments to clarify the important role of network connection to improve the performance of TENG unit, propose three kinds of unit connection strategy and construct the corresponding network, among them the flexible connection structure shows Out of the better effect, the charge output of the flexible connection network can be compared to that of the unconnected decentralized cells The connection is more than 10 times.Finally, the TENG network is used to supply power to the thermometer driven by water wave, and the temperature of the water body is successfully collected to prove its potential application in the field of marine monitoring equipment power supply.The research shows that the friction nano-generator network can be used as a wave A new and effective technical solution that can be collected and put forward an efficient network connection strategy that will be available to extend to larger unit systems to form TENG modules and large networks that provide viable for large-scale ocean wave collection path.
Relevant achievements are published on ACS Nano by the title of Coupled Triboelectric Nanogenerator Networks for Efficient Water Wave Energy Harvesting.