Ultrathin, Rollable, Paper-Based Triboelectric Nanogenerator for Acoustic Energy Harvesting and Self-Powered Sound Recording

Abstract

A 125 μm thickness, rollable, paper-based triboelectric nanogenerator (TENG) has been developed for harvesting sound wave energy, which is capable of delivering a maximum power density of 121 mW/m(2) and 968 W/m(3) under a sound pressure of 117 dBSPL. The TENG is designed in the contact-separation mode using membranes that have rationally designed holes at one side. The TENG can be implemented onto a commercial cell phone for acoustic energy harvesting from human talking; the electricity generated can be used to charge a capacitor at a rate of 0.144 V/s. Additionally, owing to the superior advantages of a broad working bandwidth, thin structure, and flexibility, a self-powered microphone for sound recording with rolled structure is demonstrated for all-sound recording without an angular dependence. The concept and design presented in this work can be extensively applied to a variety of other circumstances for either energy-harvesting or sensing purposes, for example, wearable and flexible electronics, military surveillance, jet engine noise reduction, low-cost implantable human ear, and wireless technology applications.

Fabric electrodes coated with polypyrrole nanorods for flexible supercapacitor application prepared via a reactive self-degraded template

“…As a result, it is of great importance to develop energy storage devices on textiles that can be directly used in the garment industry. In recent years, some flexible energy harvesting devices have been developing very fast [8][9][10][11]. Cotton fabric, one of the most universal textiles, is made up of natural cotton fibers, which is of a hierarchical structure with high porosity, large surface area and hydrophilic functional groups [12].…”

Honeycomb-like three electrodes based triboelectric generator for harvesting energy in full space and as a self-powered vibration alertor

“…Since the first nanogenerator was reported in 2006 [3], it has been developed very rapidly. Up to now, various nanogenerators [4][5][6][7][8] and selfpowered wireless sensing prototype devices [9][10][11][12] have been achieved by collecting energy from environment. Among various nanogenerators, triboelectric nanogenerator (TENG) based on triboelectric effect and electrostatic induction is more attractive due to its higher energy conversion efficiency in comparison with that of the nanogenerators based on piezoelectric effect or pyroelectric effect [13][14][15][16].…”

Improved performance of asymmetric fiber-based micro-supercapacitors using carbon nanoparticles for flexible energy storage

“…[4][5][6][7][8][9][10][11][12][13] The first solid-state fiber-based micro-supercapacitor (micro-SC) with ZnO nanowires electrodes was developed by Prof. Wang and his co-workers in 2011. 13 With the great advances in triboelectric nanogenerators, [14][15][16][17][18] Prof. Zhou and his co-workers combined a triboelectric generator and a supercapacitor together to form a self-powered energy module, demonstrating the great potential of fiber-shaped supercapacitors as efficient energy storage devices for self-powered electronic systems. 19 To date, various types of fibers such as carbon fibers, metal fibers, single-walled or multi-walled carbon nanotube fibers, and polymer fibers 13,[19][20][21][22][23][24][25][26][27][28][29][30][31] have been attempted to fabricate high-performance fiber-based micro-SCs.…”