Stretchable, Porous, and Conductive Energy Textiles

TLDR

Lightweight, flexible, wearable electronics are increasingly sought after, yet integrated energy storage devices for such platforms remain underdeveloped. The study presents wearable power devices built on everyday textiles. The authors used a simple dipping‑and‑drying method with single‑walled carbon nanotube ink to produce textiles with conductivity of 125 S cm⁻¹ and sheet resistance below 1 Ω sq⁻¹. The resulting conductive textiles show excellent flexibility, stretchability, strong adhesion, an areal capacitance up to 0.48 F cm⁻², and a 24‑fold increase when pseudocapacitor materials are loaded, providing new design opportunities for wearable electronics and energy storage.

Abstract

Recently there is strong interest in lightweight, flexible, and wearable electronics to meet the technological demands of modern society. Integrated energy storage devices of this type are a key area that is still significantly underdeveloped. Here, we describe wearable power devices using everyday textiles as the platform. With an extremely simple "dipping and drying" process using single-walled carbon nanotube (SWNT) ink, we produced highly conductive textiles with conductivity of 125 S cm−1 and sheet resistance less than 1 Ω/sq. Such conductive textiles show outstanding flexibility and stretchability and demonstrate strong adhesion between the SWNTs and the textiles of interest. Supercapacitors made from these conductive textiles show high areal capacitance, up to 0.48F/cm2, and high specific energy. We demonstrate the loading of pseudocapacitor materials into these conductive textiles that leads to a 24-fold increase of the areal capacitance of the device. These highly conductive textiles can provide new design opportunities for wearable electronics and energy storage applications.