New progress has been made in the research on the combination of mechanical energy collection and cathodic protection in transportation systems

Recently, the Institute of Oceanography, Chinese Academy of Sciences has made new progress in the research of the combination of friction nanopower generation devices and corrosion protection. The sponge device studied by the team of researcher Wang Xiutong of the institute can adapt to high-intensity impacts in land and water transportation and collect mechanical energy to apply to the corrosion protection of metals in the marine environment, and the relevant results were published in the international academic journal Advanced Functional Materials. 

Friction nanogenerators are based on the coupling of triboelectric and electrostatic induction technology, which can extract energy from various environmental mechanical energy movements. Based on this, the application of friction nanopower generation devices as self-powered power supply to cathodic protection is a green and effective corrosion protection technical means, which provides a solution to reduce the serious corrosion problem of marine environment.  

Polydimethylsiloxane sponge has the characteristics of network interconnection, large cavity wall size ratio, and suitable for contact separation. In order to further improve the triboelectric output of sponge, the research team adopted the electrostatic self-assembly method of polydopamine-anchored MXene particles, and the polymer formed had the triple effect of high electronegativity, high adhesion and long shelf life, and had extremely high pressure resistance and elastic recovery performance, which was suitable for mechanical energy collection in environments with large impact force and irregular environment.

It is understood that the developed sponge structure material has good elasticity and high recovery ability, wide frequency response range, high sensitivity, and can be applied to energy capture in land and marine transportation systems. Based on the characteristics of the sponge output that can reflect the wave strike force and can visually judge the wave level, an application for monitoring wave impact was developed. At the same time, the sponge collecting mechanical energy as an independent self-powered power source, the corrosion rate is significantly reduced after cathodic protection of the metal material, and the metal material is well protected.

Application of sponge generator in land and water transportation system Photo courtesy of the research group

The research was supported by the National Key R&D Program, the Shandong Provincial Key R&D Program, and the High-tech Ship Research Project of the Ministry of Industry and Information Technology. (Source: China Science News, Liao Yang, Wang Min)

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