Energy Regulation Enabled Liquid–Solid Triboelectric Nanogenerator for High Pulsed Direct‐Current Output and Low Impedance

ABSTRACT With the increasing global demand for clean and renewable energy, liquid–solid triboelectric nanogenerators (LS‐TENGs) have emerged as promising candidates for efficient high‐entropy energy harvesting. However, their practical application in directly powering electrical devices is limited by high impedance, low current, and alternating output characteristics of LS‐TENGs. To address these limitations, we propose a novel energy management liquid–solid triboelectric nanogenerator (EMLS‐TENG) employing an external energy storage capacitor and a mechanical switch to construct an energy regulation mechanism, enabling high‐amplitude pulsed direct current output and ultra‐low impedance. Compared to conventional LS‐TENGs, the EMLS‐TENG achieves a 7500‐fold increase in output current and a 79‐fold increase in output power. The effects of key parameters, including the selection of triboelectric materials, electronic components, switch distance, and switch size on the output performance of the EMLS‐TENG was systematically investigated. Through an integrated design, the EMLS‐TENG achieves a record‐setting power density of 1135 W/m 3 at the impedance of 0.5 MΩ and a current density of 1120 mA/m 2 . Furthermore, the EMLS‐TENG successfully powered six commercial 15 W light tubes and supplied energy to various commercial sensors. This work provides a leap forward in improving the performance of LS‐TENGs and accelerating their commercial implementation.