Wearable Triboelectric Nanogenerators Based on Polyamide Composites Doped with 2D Graphitic Carbon Nitride

Abstract

Triboelectric nanogenerators (TENGs) have attracted many researchers’ attention with their remarkable potential despite the fact that the practical implementation requires further improvement in their electric performance. In this work, a novel graphene phase two-dimension material, graphitic carbon nitride (g-C3N4), was employed for the development of a TENG material with enhanced features. An electrospun nanofibrous PA66 membrane doped with g-C3N4 was fabricated as a multifunctional TENG for harvesting different kinds of mechanical energy and detecting human motions. By utilizing the innovative 2D material in PA66 solution for electrospinning, the as-made TENG showed a two times enhancement in electrical performance as compared to the control device, and also had the advantages of lightweight, softness, high porosity, and rugged interface properties. The assembled TENG with 4 cm2 could light up 40 light-emitting diodes by gentle hand clapping and power electronic watches or calculators with charging capacitors. At a given impact force of 40 N and 3 Hz, the as-made TENG can generate an open-circuit voltage of 80 V, short current of ±3 µA, charge transfer of 50 nC, and a maximum power density of 45 mW/m2 at a load resistance of 500 MΩ. The UV light sensitivity of TENG was also improved via g-C3N4 doping, showing that charge transfer is very sensitive with a two times enhancement with dopant. For the demonstration of applications, the g-C3N4 doped TENG was fabricated into an energy flag to scavenge wind energy and sensor devices for detecting human motions.

Free‐Standing Electrode and Fixed Surface Tiny Electrode Implemented Triboelectric Nanogenerator with High Instantaneous Current

“…These fluctuations have also been observed in previous work and can generally be attributed to some environmental factors. [50,51] Additionally, Figure 4c demonstrates the respective variation curves of transfer charges, which are found to be invariant with working frequencies for all four types, consistent with earlier studies. [37] Interestingly, the transfer charge of FFI-TENG (surface treated), following the removal of surface charges, attains a level comparable to that of CS-TENG.…”

2D Material‐Based Wearable Energy Harvesting Textiles: A Review

“…[ 33,119,120 ] The use of 2D materials in the fabrication of textile‐based wearable TENGs has resulted in considerable improvements in mechanical and electrical performance. [ 121–126 ] These findings demonstrate that 2D materials are absolutely fascinating candidates for mechanical energy harvesting applications in wearable textiles.…”

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

“…However, this rapid fossil energy consumption has a major consequence of fossil energy depletion, resulting in environmental pollution due to incomplete burning. [1] Thus, energy sources that are clean, renewable, and environment-friendly, such as wind energy, [2][3][4][5][6] solar energy, [7][8][9] and wave energy, [10][11][12] have become immensely popular. In 2012, Wang presented the triboelectric DOI: 10.1002/admt.202301588 nanogenerator (TENG) based on the coupling of electrostatic induction and triboelectrification.…”