Introduction of Triboelectric Positive Bioplastic for Powering Portable Electronics and Self-Powered Gait Sensor
ACS APPLIED ENERGY MATERIALS(2019)
摘要
Triboelectric nanogenerators (TENGs) are in the center of alternative energy scavenger technologies because of numerous possible applications in remote energy harvesting and self-powered sensing. Although there exists a large number of triboelectric negative polymers, the choice of triboelectric positive polymers is indeed limited. Here we report for the first time the use of thermoplastic starch (TPS) as a triboelectric positive material for designing TENGs. Our bioplastic-based highly durable TENG (b-TENG) can generate open-circuit peak-to-peak output voltage of similar to 560 V with output current density of similar to 120 mA m(-2) and instantaneous output power density of 17 W m(-2). We demonstrate b-TENG as a portable power source by powering more than 100 commercial blue LEDs, LED strips, and seven segment LCD screens. Additionally, the b-TENG can be used as a self-powered pedometer for step counter, a speedometer for human walking and running, and a human gait analysis sensor to assess physical activity breeding its futuristic biomedical applications for healthcare purposes. The introduction of eco-friendly bioplastic TPS as a triboelectric positive component has great potential for biomedical applications because of the abundance, biodegradability, low cost, and ease in fabrication process.
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关键词
TENG,bioplastic,thermoplastic starch,gait sensor,pedometer
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