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Thermal-Triggered 'On–Off' Switchable Triboelectric Nanogenerator Based on Two-Way Shape Memory Polymer

机译：Thermal-Triggered 'On–Off' Switchable Triboelectric Nanogenerator Based on Two-Way Shape Memory Polymer

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摘要

Developing multifunctional triboelectric nanogenerators (TENGs) withspecial intelligence is of great significance for next-generation self-poweredelectronic devices. However, the relevant work on the intelligent TENGs,especially those spontaneously responsive to external stimuli, is rarelyreported. Herein, an intelligent TENG with thermal-triggered switchablefunctionality and high triboelectric outputs is developed by designing amovable triboelectric layer, which is driven by a two-way shape memorypolyurethane. The resultant TENG device can be spontaneously switchedon/off in response to the environmental temperature change, i.e., switchingon at 0 ℃ and off at 60 ℃. At the “on” state, the developed TENG exhibitsexcellent triboelectric performance with a maximum output power densityof 5.15 W m~(?2) at a pressure of 30 kPa due to the unique advantages ofmicro-/nanofiber triboelectric surfaces. Furthermore, the great potentialof the switchable TENG in intelligent wearable electronic applicationsis demonstrated, which can serve as not only the sensing element formonitoring human movement and physical condition in a cold environmentbut also the thermal-driven switch for turning on/off the heating functionon demand. The intelligent “on–off” switchable TENG combined withexcellent triboelectric performance may provide new opportunities for futureself-powered wearable electronics.

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