Siloxene/PVDF Composite Nanofibrous Membrane for High‐Performance Triboelectric Nanogenerator and Self‐Powered Static and Dynamic Pressure Sensing Applications

Abstract

Polymer nanofibers are widely adopted in energy harvesting and pressure sensing applications owing to the large contact area and inherent compressibility. Herein, a high-performance triboelectric nanogenerator (TENG) based on 2D siloxene-polyvinylidene fluoride (S-PVDF) composite nanofibrous membrane is newly evaluated. Through proper ratio optimization and facile electrospinning, the fabricated membrane shows significant improvement in dielectric property, electronegativity, and compressibility. The TENG comprising S-PVDF membrane and Nylon 6/6 can deliver an excellent power density of 13.25 W m −2 (f ≈ 5 Hz) and easily operates low-power electronics and Internet of things (IoTs). In addition, the excellent compressibility of membrane extends its applicability to self-powered simultaneous detection of dynamic and static pressure, which is investigated by developing a hybrid pressure sensor (HPS) through effective integration of TENG and a capacitive pressure sensor. The HPS shows an excellent dynamic (12.062 V kPa −1 at (<3 kPa) and 2.58 V kPa −1 at (3-25 kPa)) and static (25.07 mV kPa −1 at (<3 kPa) and 5.96 mV kPa −1 at (3-25 kPa)) pressure sensitivities, respectively. Furthermore, a 2 × 2 HPS array tested and analyzed for multiple users using artificial intelligence significantly improves the accuracy (98%). Remarkable energy harvesting performance and greater accuracy of the HPS manifests better preferences for future self-powered IoT and smart tactile-based user authentication systems.

Nanogenerators‐Based Self‐Powered Sensors

“…With the new era of the IoT, combining AI and 5G technology increases sharply from human's neuromorphic analysis to external physical signal monitoring and provides a real‐time update of human functional analysis. [ 159 ] The application of AI‐based sensory systems for complex nerve systems is also increasing to accelerate the performance of nerve function. Tactile afferent nerve systems are crucial for increasing human performance in hepatic exploration, tender touching, proprioception, and object manipulation.…”

Bioinspired Multifunctional E‐skin for Robot Dynamic Tactile Real‐Time Feedback Systems Using Triboelectric Sensors and Electrochromic Devices

“…TENG pressure sensor exhibited high sensitivity in low-pressure range and low sensitivity in high-pressure range. [54][55][56][57][58][59][60][61][62] This was attributed to the obvious dependence of the output voltage on the contact area of the friction layer, thus resulting in a non-linear relationship between the force applied to the sensor and the output voltage. The sensitivity of the TES was defined as S = ∆V/∆P, where ∆V and ∆P represented the relative change in voltage and the relative change in applied pressure, respectively.…”

Green-in-green biohybrids as transient biotriboelectric nanogenerators

“… 1 , 2 , 3 The self-powered system can convert all kinds of ambient energy into electrical energy to maintain the operation of the device. 4 , 5 , 6 , 7 The technology mainly depends on the special coupling effects that include triboelectric effect, 8 , 9 , 10 piezoelectric effect, 11 , 12 , 13 electromagnetic effect, 14 , 15 , 16 thermoelectric effect 17 , 18 , 19 and pyroelectric effect, 20 , 21 , 22 , 23 and so forth. He et al.…”