Screening nanogenerator based on the screening effect of water layer

Electrostatics was considered to be a negative effect a long time ago, people never used frictional electrification to collect kinetic energy and convert it into electrical energy until the invention of the triboelectric nanogenerator (TENG). Generally speaking, triboelectrification is susceptible to humidity, but this influence mechanism has not yet been fully figured out. In fact, clarifying the physics will be conducive to the design of new devices. In this work, we sort out the influencing mechanisms of humidity on TENG, and differentiate them by their characteristic time. Based on this analysis and the traditional non-contact nanogenerator structure, a screening nanogenerator is designed utilizing the screening effect of water layer. The effects of screening boards in different locations on the system are studied. Surprisingly, the outside screening board can also influence system. Therefore, an outside screening sensor is designed for detecting the charge state of matter and monitoring water levels. This work builds a new mode for further understanding about interaction principle of humidity and surface charge, and presents a different strategy to design humidity-resistant TENG. Meanwhile, the research frontier of many-body charge interaction based on non-Landau system is raised, hoping to inspire more scholars.