High-performance energy harvesting device and self-powered wide-range pressure sensor with microstructure and porous synergy

The saturation phenomenon of TENG at large pressures heavily limits its applications in the field of pressure detection, and the development of wide-range pressure detection devices based on TENG is a considerable challenge. In this paper, a double-layer dielectric layer with a synergistic microstructure and porous structure was prepared, and the CCM-TENG was constructed to realize high output performance and wide range pressure detection. In terms of output performance, owing to the increased effective contact area of the microstructure and porous structure and the introduction of bamboo charcoal and BC/MXene fillers, CCM-TENG shows a superior output performance. A power density of 6.2 W/m 2 is achieved with optimal impedance matching, and at 30*40 mm it is capable of lighting more than 600 LEDs and driving small electronic devices. In terms of pressure detection, the design of the microstructure allows the CCM-TENG to respond well to very small pressures (pulses), while the design of the porous structure allows the CCM-TENG to measure larger pressures (1000 kPa) and achieve fast response/recovery times (14/10 ms@11 Hz). CCM-TENG’s ability to detect a wide range of pressures and comprehensive motion assessments has been validated by human pulse monitoring and motion monitoring. This shows the great potential of wide pressure sensors based on CCM-TENG in the field of wearable sensors.