Triboelectric polymer with excellent enhanced electrical output performance over a wide temperature range

Due to thermionic emission of triboelectric charge and degradation of mechanical stability of polymer tribo -materials (PTMs), PTMs based TENG (PTM-TENG) cannot maintain efficient electrical output and operate stably at high temperatures. Herein, a series of fatty acid doped PVDF-HFP (PH-FA) PTMs are fabricated. The intro-duction of FA lubricants dramatically increases the beta-phase relative fraction, dielectric constant and surface charge potential of PTMs. Therefore, the PH-SA (stearic acid) based TENG shows improved electrical output over a wide temperature range, extraordinary stability, and durability. Particularly, the VT/VRoom, IT/IRoom and QT/ QRoom of PH-SA at 100 degrees C are separately up to 231.10%, 251.46% and 234.01%, the output efficiency of PH-SA is still higher than 100% at 120 degrees C. This study not only provides pioneering reference for the development of advanced PTM-TENG with enhanced output performance over a wide temperature range, but also greatly pro-motes the application of PTM-TENG devices in harsh environments.

Automated summary

By introducing fatty acid lubricants, the electrical performance and stability of PH-SA based TENG have been improved, enabling it to maintain high-efficiency electrical output at high temperatures. This study provides an important reference for the development of high-performance PTM-TENG and greatly promotes the application of PTM-TENG devices in harsh environments.