Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

Abstract

In this study, we report on the rational design and facile preparation of a cotton-reduced graphene oxide-silver nanoparticle (cotton-RGO-AgNP) hybrid fiber as an electrode for the building of a flexible fiber-shaped supercapacitor (FSSC). It was adequately characterized and found to possess a well-defined core−shell structure with cotton yarn as a core and a porous RGO-AgNP coating as a shell. Thanks to the unique morphological features and low electrical resistance (only 2.3 Ω·cm−1), it displayed attractive supercapacitive properties. When evaluated in a three-electrode setup, this FSSC electrode delivered the highest linear and volumetric specific capacitance of up to ca. 12.09 mF·cm−1 and ca. 9.67 F·cm−3 with a satisfactory rate capability as well as a decent cycling stability. On the other hand, an individual parallel symmetric FSSC cell constructed by this composite fiber fulfilled the largest linear and volumetric specific capacitance of ca. 1.67 mF·cm−1 and ca. 0.67 F·cm−3 and offered the maximum energy density, as high as ca. 93.1 μWh·cm−3, which outperformed a great number of graphene- and textile yarn-based FSSCs. Impressively, bending deformation brought about quite a limited effect on its electrochemical behaviors and almost no capacitance degradation took place during the consecutive charge/discharge test for over 10,000 cycles. Consequently, these remarkable performances suggest that the currently developed cotton-RGO-AgNP fiber has considerable application potential in flexible, portable and wearable electronics.

Fundamentals and Scientific Challenges in Structural Design of Cathode Materials for Zinc‐Ion Hybrid Supercapacitors

“…[ 286 ] Considering SCs as an example, fiber‐shaped SCs (FSSCs) are predominantly fascinating and promising compared to ordinary massive or flat SCs. [ 287 ] Owing to their invincible flexibility, high accessibility to today's textile industry, and downsized device dimensions and weights. [ 288 ] On the other hand, FSSCs have small specific capacitances and energy densities.…”

Anti-microbial and methylene blue dye adsorption properties of cotton fabrics modified with TiO2, Fe, Ag-doped TiO2, and graphene oxide nanomaterials

“…The increase in the peak intensity of GO-Cot compared with pure cotton may be attributed to the overlapping of the peaks originating from the sample constituents. 102 However, the decrease in the peak intensities of the cotton coated by titanium oxide might be because the coating material can stop the X-ray beam from spreading through the surface of cotton directly. 103 The XRD results also show the absence of any diffraction peaks characterizing the rutile and/or anatase TiO 2 phases on the TiO 2 -coated cotton fabrics, which could be attributed to the low content of TiO 2 or the presence of TiO 2 in an amorphous state on the fabrics.…”

Facile Construction of Three-Dimensional Architectures of a Nanostructured Polypyrrole on Carbon Nanotube Fibers and Their Effect on Supercapacitor Performance

“…With the growing demand for personal and portable electronics, flexible and wearable supercapacitors have attracted more and more attention. − Fiber-shaped supercapacitors (FSSCs), which can be woven into flexible powering textiles, are particularly promising for portable and wearable electronic devices. Recently, various fiber electrodes have been developed to fabricate FSSCs, including carbon nanotube fibers (CNTFs), metal wires, polymer fibers, and cotton thread-based supercapacitors. − …”