Constructing high-efficiency stretchable-breathable triboelectric fabric for biomechanical energy harvesting and intelligent sensing. (April 2023)

• Record Type: Journal Article
• Authors: Xu, Yunlong; Bai, Zhiqing; Xu, Guangbiao
• Is Part Of: Nano energy. Volume 108(2023)
• Publication Date: 2023-04
• Subjects: Triboelectric fabric -- Breathability and stretchability -- Dual modulation -- Power supply -- Self-powered sensor; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2023.108224
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Triboelectric fabrics have attracted significant attention in wearable power supplies and self-powered sensors. Simultaneously endowing triboelectric fabrics with excellent electrical properties, good stretchability and breathability remain a challenging issue. In this work, a highly-efficient stretchable-breathable triboelectric fabric is developed by using a porous composite prepared from polyethyleneimine/silica-coated titanium dioxide (PEI/SiO2 @TiO2 ) modulated carboxymethyl cellulose/waterborne polyurethane as the tribomaterial and polyethyleneimine/carbon nanotubes conductive nanomaterial as the electrode. By systematically manipulating the mass ratio of SiO2 @TiO2 NPs, PEI and well-dispersed PEI/SiO2 @TiO2, the electrical performance of the optimized triboelectric fabrics can be improved by 111% compared with the unoptimized one, and it can deliver a power density of 1.62 W m −2, higher than most other reported stretchable-breathable triboelectric fabrics. The output improvement can be ascribed to the synergistic effect of the enhanced internal polarization of the well-dispersed PEI/SiO2 @TiO2 and the double charge transfer mechanism originating from amino groups. More importantly, the triboelectric fabrics exhibit a good elongation of 245% and a high air permeability of 105.1 mm s −1, which is greatly favorable to the wearable comfort of users. Furthermore, the fabric exhibits good durability and stability in electrical performance during continuous dynamic deformation and long-term use, and it can be widely used for body energy harvesting, remote system control and physiological monitoring. This work provides a practical and feasible idea for constructing high-efficiency stretchable-breathable triboelectric fabric and achieves the all-in-one fabrication of triboelectric fabric with promising electrical performance, comfort performance and mechanical properties. Graphical Abstract: Graphical abstract ga1 Highlights: A high-performance stretchable-breathable triboelectric fabric is proposed. The fabric was optimized by regulating the internal polarization and double charge transfer. The electric performance is higher than most current breathable-stretchable triboelectric fabrics. Unifying promising electrical performance and good stretchability-breathability in a single electronic fabric. Triboelectric fabrics can be used for biomechanical energy harvesting, remote system control and physiological monitoring.