Enhanced Output of On‐Body Direct‐Current Power Textiles by Efficient Energy Management for Sustainable Working of Mobile Electronics

Abstract

Triboelectric power textile (TPT) that can harvest widespread but always neglected human biomechanical energy is considered a promising and reliable energy source for wearable electronics. However, the alternating current and high impedance of triboelectric nanogenerators as well as the meager electrical output caused by the properties of the textile itself greatly restrict its practical applications. Here, an autonomous power textile with practical application value, which consists of a high‐output direct‐current TPT (DC‐TPT) and a miniaturized energy management module (EMM), is achieved for continuous operation of wearable and mobile electronics. The home‐preparable multiarray DC‐TPT can harvest transferred charge of 5.5 µC per cycle with nine repeating units. Moreover, it is found that incorrect sewing positions of the polytetrafluoroethylene (PTFE) yarn change the working mechanism with a decreased DC output. The EMM with energy conversion efficiency of 82.6% can reduce the impedance of DC‐TPT from 200 to 1.6 MΩ. With its powerful assistance, the watch can work continuously for 172 s just by manually sliding the DC‐TPT 1.6 s on an arm, and wireless signals can be transmitted to 281 m away after sliding for 2 min. Various widely used electronics can also be easily and continuously driven.

Achieving Continuous Self‐Powered Energy Conversion‐Storage‐Supply Integrated System Based on Carbon Felt

“…In the process of charging the supercapacitors by C-TENG, the extremely high peak-to-peak voltage can be converted into a safe and reasonable voltage by the power management circuit, and the specific conversion process is shown in Figure S18, Supporting Information. [36,37] AC from C-TENG is converted into DC through the management circuit, part of which is supplied to the external load, and the excess is stored by the CSSC in parallel. When the C-TENG stops working, the electric energy stored in the CSSC can be supplied to the external load continually, thus realizing the uninterrupted operation of the external load throughout the whole process.…”

Emerging Self‐Powered Autonomous Sensing Triboelectric Fibers toward Future Wearable Human‐Computer Interaction Devices

“…To further increase the electrical output, Cheng et al increased the number of units and designed a power management module to match the DC output (Figure 10d). [90] The alternating current and high impedance of frictional electric nanogenerators greatly limit their practical application. In this paper, an energy textile consists of a high output DC triboelectric power textile (DC-TPT) and a miniaturized energy management module (EMM).…”

Physical Cue‐Based Strategies on Peripheral Nerve Regeneration

“…[ 177–179 ] Taking advantage of periodic press and release of top and bottom plates of TENG‐based device, it can yield potential by converting passive human biomechanical energy into electricity. [ 180,181 ] Therefore, electrical signals generated by such technology have the synchronous adjustment capability with autogenous physiological states, which presented a promising foreground to eliminate neural stimulus‐inertia caused by conventional ES with fixed frequency and intensity. Jin et al proposed a fully implantable tribo/piezoelectrical hybrid nanogenerator and implanted it into thorax subcutaneous tissue to provide a physiologically self‐regulated electrical signal for long‐segment PNI (15 mm defect) (Figures 7c,d).…”