Portable self-charging power unit with integrated flexible supercapacitor and triboelectric nanogenerator

In recent years, with the rapid growth of intelligent electronic devices, there is a growing need for portable and sustainable energy sources. Self-charging power storage devices, owing to their green and environmentally friendly nature, simple structure, low cost, and maintenance-free characteristics, have emerged as the most promising solution. To this work, we perform an integrated self-charging motive power unit with silver nanowires (AgNW) doped silicon rubber based triboelectric nanogenerator (TENG) and carbon cloth (CC) based solid-state supercapacitor. The assembled NiMn-LDH@CC//PVA-KOH//Fe ₂O ₃ @CC asymmetric supercapacitor (ASC), exhibits good capacity and stability as an energy storage component. In terms of the TENG, it effectively captures the energy from human body movements by single electrode structure, and demonstrates remarkable stability even during continuous operation for 2000 s. By integrating the self-charging energy storage device with the combined capabilities of the ASC and the TENG, this technology offers a one-stop solution for energy harvesting and storage. Therefore, this novel integrated self-charging power unit holds good promise to offer a practical and reliable power supply option for electronic systems.