Liquid-solid contact triboelectric nanogenerator based on tubular structure for energy harvesting and self-powered sensing

The problem of energy supply for distributed sensors in the Internet of Things is becoming more and more prominent, and the trend of miniaturization of sensors makes the micro mechanical energy widely existing in the environment a possible energy source. [1]–[2] The triboelectric nanogenerator (TENG) based on the coupling effect of triboelectric and electrostatic induction can convert mechanical energy into electrical energy, which provides a new idea for micro energy collection and conversion.[3] The traditional hydro power generation technology is very mature, but due to the working principle and structure limitation, it is difficult to collect micro water energy and blue ocean energy. TENG has advantages in low frequency and wide frequency vibration energy, and has high adaptability to working environment and energy form. TENG is considered as a potential micro water energy collection technology and ideal scheme. In this paper, a liquid-solid triboelectric nanogenerator (LS-TENG) with tubular structure is designed to realize the direct extraction and collection of liquid-solid friction charge without electrostatic induction effect.