Abstract
Durable self-powering electronic devices need high-performance triboelectric nanogenerators (TENGs) with shape memory capabilities. A novel porous shape memory polymer nanocomposite that includes polyethylene foam (PEF) with switching molecules and graphitic carbon nitride nanosheets is designed to create a robust, high-performance TENG. This nanocomposite shows outstanding thermal-actuated shape recovery capabilities by heating at 70 °C. Although the TENG initially excels in output performance (1840 V voltage, 79.66 mW.cm‐2 power density), prolonged harsh conditions cause nanocomposite deformation and performance decline. However, heating the nanocomposite to 70 °C fully restores the TENG’s original performance. Besides, the COMSOL Multiphysics simulation of TENG aligns with the experimental results. Furthermore, two TENG application scenarios are demonstrated: self-charging humidity sensing (where TENG’s output performance is humidity-sensitive and decreases as humidity rises) and powering electronic devices (where TENG turns on commercial LEDs, powers a smartwatch, and charges capacitors). Therefore, this TENG may open new possibilities for future self-powered electrical devices and sensors.
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