High‐Performance and Durable Rotational Triboelectric Nanogenerator Leveraging Soft‐Contact Coplanar Charge Pumping Strategy
Shaobo Lv, Hongyun Li, Yiyuan Xie, Binbin Zhang, Bochao Liu, Jin Yang, Hengyu Guo, Zhengbao Yang, Zhiming Lin
Abstract
Abstract The triboelectric nanogenerator (TENG) represents a burgeoning approach for harvesting ambient mechanical energy. However, practical applications suffer from the issues of insufficient charge density and material abrasion. Here, a rotational TENG that attains exceptional output performance and durability in mechanical energy harvesting and couples an ingenious coplanar charge pump by soft contact with a suspended electrostatic induction mode is presented. Thanks to the continuous and synchronous charge injection from the central charge pumping unit, the charge density can be up to 74.62 µC m −2 , resulting in an outstanding peak power density of 20.72 W m −2 . Moreover, the utilization of yielding polyester fur in the charge pumping unit as a tribo‐layer for soft contact decreases the material abrasion and then enhances durability and robustness. And the experimental results show that the TENG can maintain 99.2% electrical output after 100 000 operating cycles. With the optimized design, the prototype can continuously drive four commercial lamps rated 12 W in series. Furthermore, a wireless powering system is demonstrated to power the electronics, demonstrating an extensive application of the TENG. Given the compelling characteristics, this work is expected to provide a sound strategy for improving TENGs’ output and durability in the field of self‐powered sensor systems.