In recent years, the marine eco-environment sensor has gradually developed toward the direction of miniaturization and intelligence, which poses a great challenge to the entire sensor system in terms of energy supply, materials, and communications. Domestic and foreign researchers have conducted research on new energy technologies for marine eco-environment sensors, such as solar energy, wind energy, temperature difference energy, and wave energy. Compared to solar energy, wind energy and temperature difference energy, waves contain enormous energy and have greater time and space applicability. However, since the wave motion is a multi-directional reciprocating motion, the characteristics of its randomness of motion cause the captured energy flow to be unstable, and it is difficult to design appropriate energy conversion devices at all levels of a wave energy power generation device. The research, development and development of a new, simple and sustainable wave energy harvesting system has gradually become the focus of attention in the scientific and technological community.
Recently, Zhu Guang's research team of the Beijing Institute of Nano Energy and Systems, Chinese Academy of Sciences proposed a flexible random wave friction nanogenerator based on solid/liquid interface frictional electrification and two-dimensional array electrode integration to efficiently collect and convert wave energy and use The wireless sensor circuit is driven to transmit wireless signals at regular intervals. The work uses the integrated structure of the two-dimensional array electrode rectifier chip to convert the random wave mechanical energy collected from the two-dimensional and multi-directional motions into electrical energy output, and can efficiently collect and convert the wave mechanical energy under various random wave conditions. Its structural advantages are mainly reflected in the following: under the same kind of random wave conditions, the output of flexible friction nano-generators increases with the number of arrays of two-dimensional array electrodes; friction nano-generators with higher number of arrays in a variety of random waves Higher power output can be obtained under all conditions. Under the laboratory conditions, a flexible 2D array integrated friction nano-generator with an effective area of ​​10cm*7cm drives the wireless signal transmission circuit board to transmit wireless signals and can achieve a 53-second time-launched wireless signal, basically meeting the large scope of marine monitoring. , near real-time, all-weather monitoring of energy demand. The flexible friction nanogenerator proposed in this study collects wave energy to drive ocean wireless sensor signal transmission, which has the advantages of light weight, low cost, environmental protection, energy saving, and easy maintenance. It also provides power supply for network nodes that realize long-term no-surveillance in the ocean and The realization of the ocean remote self-powered wireless sensor network system provides a new energy supply solution, which has important research and practical application value. The relevant research results were published on the recent ACS Nano (DOI: 10.1021/acsnano.7b08716).
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