Preparation and Characterization of Amide-Containing Polyimide Films with Enhanced Tribopositivity for Triboelectric Nanogenerators to Harvest Energy at Elevated Temperatures

• Published in: Nanoenergy Advances 2024-09, Vol.4 (3), p.284-299
• Main Authors: Pan, Zhen, Yuan, Shunqi, Zhang, Yan, Ren, Xi, He, Zhibin, Wang, Zhenzhong, Han, Shujun, Qi, Yuexin, Yu, Haifeng, Liu, Jingang
• Format: Article
• Language: English
• Subjects: amide; high temperature; polyimide; thermal properties; triboelectric nanogenerators
• ISSN: 2673-706X; 2673-706X
• DOI: 10.3390/nanoenergyadv4030017

As triboelectric nanogenerator (TENG) technology continue to evolve, its application in harsh environments has increasingly captivated the interest of researchers. However, the current research on heat-resistant triboelectric materials remains predominantly focused on the development of tribo-negative materials, with scant attention given to their equally crucial tribo-positive counterparts. In this study, the tribo-positive polyimide (PI) material with enhanced tribo-positivity is developed by integrating amide groups with electron-donating effects into the molecular chain. Furthermore, the TENG devices based on this series of tribo-positive PI materials have demonstrated an open-circuit voltage (VOC) of 242 V, a short-circuit current (ISC) of 8.13 μA, and a transferred charge (QSC) of 117 nC. Notably, these devices also demonstrate the capability to efficiently generate electricity even under elevated temperature conditions. This work not only proposes a potential molecular design strategy for developing high-performance tribo-positive PI materials applicable in TENGs, but also markedly propels the advancement of robust energy-harvesting devices engineered for operation at elevated temperatures.