Wear- and High-Temperature-Resistant IGNs/ Fe3O4/PI Composites for Triboelectric Nanogenerator

The high wear and temperature resistance of electrode materials are the key issues to extend the application of triboelectric nanogenerators (TENG). The synergistic effect of Fe 3 O 4 and ionic liquid-modified graphene (IGNs) were used to enhance the wear resistance, heat resistance, and mechanical properties of polyimide (PI). Then, the output performance of the PI-based TENG in contact–separation mode was tested. The results show that the tensile strength and thermal decomposition temperature of the IGNs/Fe 3 O 4 /PI composites (2F2G) d increased by 57 MPa and 23°C, respectively, due to the synergistic effect of IGNs and Fe 3 O 4 . In addition, the friction coefficient and wear rate of the 2F2G decreased by 21% and 14%, respectively. The open-circuit voltage, short-circuit current, and peak power density of the 2F2G-based TENG were 65 V, 2.48 μA, and 1.34 W/m 2 at 1 Hz, respectively. Owing to the high wear and temperature resistance of the 2F2G, the 2F2G-based TENG has a broad application prospect in the fields of wear- or high-temperature-resistant energy harvesting and self-powered sensors. Graphical Abstract