In this study, we fabricated a flexible TENG completely out of NFs, and these NFs were produced through electrospinning. The natural polysaccharide CS was electrospun using the PVA additive, and its tribopositivity was observed as an increasing trend. The PVDF negative friction layer with high crystallinity and dielectric properties was enhanced by doping with a TiO₂/MWCNT (TC) mixed composite.

Technology Overview
A high-performance triboelectric energy harvester was fabricated using multifunctional nanofibers. An in-depth discussion was conducted on the surface charge enhancement and trapping ability of PDPV microbeads. In-situ interlocked NFM offers superhydrophobicity and Anti-delamination for long-life, highly efficient TENG. The high-output energy of TENG was stored and applied to portable electronic devices. PTC_y NFM electricfield-induced photocatalytic performance and ultraviolet protection efficiency investigated.

Applications & Benefits
The maximum peak-to-peak open circuit voltage, short circuit current, and power density obtained in this study were 305 V, 11.5 μA, and 124.3 mW m⁻², respectively. In addition, we investigated the self-cleaning ability of TC-doped NFMs against RhB dye. The photocatalytic efficiency of TC improved by 95% by inducing spatial electric-field. The PTC10-PDPV was enhanced and given the additional features of UV resistance, antibacterial property, and hydrophobicity to meet the requirements of smart garments. The advantages of Ag-NP-surface-functionalized SBS NFMs are their biocompatibility, antibacterial effect, and low resistance change even after 60,000 cycles, indicating that they are promising flexible electrodes for our F-TENG.

Abstract：
Wearable triboelectric nanogenerators (TENGs) with high electrical performance have recently prompted great expectations. However, charge diffusion and recombination affect the electric field strength, resulting in a weak electrostatic potential in the displacement region. Current research on film-type dielectric interlayers indicates that charge trapping can prevent charge recombination, although surface charge air breakdown has not been addressed, and becomes a crucial demand in wearable energy applications. In the present study, the surface charge density of poly(vinylidene fluoride) (PVDF) nanofibers is greatly improved by co-electrospraying PDMS-PVDF (PDPV) charge-trapping microbeads; this new approach prolongs the lifetime of surface charges. In particular, the PDPV beads prevent charge recombination, and the interlocking mechanism enhances the tensile property of the PVDF nanofibers. These result in a two-fold increase in the open-circuit voltage and peak power density to 305 V and 124.3 mW m⁻², respectively. The device is successfully employed in portable electronic gadgets. Ag-nanoparticle-grafted styrene-butadiene-styrene (SBS) fiber is used as an electrode because it has favorable stretchability with low resistance and is antibacterial. The addition of TiO₂/multiwalled carbon nanotube to PVDF nanofiber membrane shows excellent electricfield-induced photocatalyst and ultraviolet protection. Our surface-enhanced fully fiber-based TENG is a promising energy harvester for flexible smart garments applications. 

Surface-enhanced fully nanofiber-based self-cleanable ultraviolet resistive triboelectric energy harvester for wearable smart garments
Author：Manikandan Venkatesan, Jayashree Chandrasekar, Fang-Cheng Liang, Wei-Chun Lin, Wei-Cheng Chen, Chia-Jung Cho, Yi-Ting Chen, Wen-Ya Lee, Chaochin Su, Ye Zhou, Ying-Chih Lai, Chi-Ching Kuo
Year：2023
Source publication：Nano Energy  Volume 113, August 2023
Subfield Highest percentage：99%  Electrical and Electronic Engineering  # 6 / 797

https://www.sciencedirect.com/science/article/pii/S2211285523003932