Self‐Layered Triboelectric Nanogenerator for Ultrahigh Electricity Supply

Capturing low‐density ambient mechanical energy to power devices is a sustainable development pathway. In which, triboelectric nanogenerator (TENG) with a stacked design has garnered wide attention for its remarkable enhancement in output. However, the traditional layer‐by‐layer method generally results in complex fabrication and low output density. Herein, a novel self‐layered method is proposed for efficiently constructing high output stacked TENG based on sliding mode. With the stacked thin steel sheets serving as the stator, an insertable rotor consisting of long fibers in the radial direction can be easily inserted into the stator during the rotating process. This achieves a self‐layered effect, greatly simplifying the fabrication and improving the output. Finally, a highly integrated TENG comprising 200 units is fabricated within a height of 16.05 cm, and the volume charge density reaches 49.39 ± 1.73 mC m −3 , which is 4 times of the previous record. The high power enables 10 commercial LEDs in 90 W power or 46 wireless agricultural sensors to work continuously. Besides, the TENG of 40 units can continuously power 8 wireless agricultural sensors at 6 m s −1 wind speed. Overall, this work overcomes the limitations of traditional designs, and provides a novel approach toward large‐scale energy applications in sustainable agriculture.