In recent years, marine eco-environment sensors have gradually developed in the direction of miniaturization and intelligence, which poses great challenges to the energy supply, materials and communication of the entire sensor system. Research on new energy technologies for marine eco-environment sensors such as solar energy, wind energy, temperature difference energy and wave energy have been carried out at home and abroad. Compared to solar energy, wind energy and temperature difference energy, waves have enormous energy and have a greater range of time and space. However, since the motion of the waves is a multi-directional reciprocating motion, the random nature of the motion causes the captured energy flow to be unstable, and it is difficult to design various energy conversion devices of the wave power generation device. The development and development of a new, simple and sustainable wave energy harvesting system has gradually become the focus of the scientific and technological community.
Recently, the Zhu Guang 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 power generation, which efficiently collects converted wave energy and uses it. The wireless sensor circuit is driven to periodically transmit a wireless signal. The work utilizes the two-dimensional array electrode rectifier chip integrated structure design to collect and convert the random wave mechanical energy of two-dimensional multi-directional motion into electric energy output, and can efficiently collect and convert the wave mechanical energy under various random wave conditions. The structural advantages are mainly reflected in the same random wave condition, the power output of the flexible friction nano-generator increases with the number of arrays of two-dimensional array electrodes; the friction nano-generator with higher array number is in a variety of random waves. Higher power output can be obtained under conditions. Under laboratory conditions, a flexible two-dimensional array integrated friction nanogenerator with an effective area of ​​10cm*7cm drives the wireless signal transmitting circuit board to transmit wireless signals, which can realize a wireless signal at a time of 53 seconds, which basically meets the wide range of ocean monitoring. Nearly real-time, all-weather monitoring of energy needs. The flexible friction nano-generator proposed by the research 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 is a power supply problem for the long-term unsupervised network nodes. The realization of the marine remote self-powered wireless sensor network system provides a new energy supply solution with important research and practical application value. Related research results were published on the recent ACS Nano (DOI: 10.1021/acsnano.7b08716).
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