Fiber/Yarn-Based Flexible Supercapacitor

Abstract

This chapter reviews the fiber/yarn-based flexible supercapacitors (SCs) by using a special categorization method based on the intrinsic characteristic of fiber/yarn: electrical conductivity. According to the classification, it discusses the advantages and disadvantages in the fabrication of various intrinsic conductive and nonconductive fibers/yarns to one-dimensional (1D) SCs along with their resultant prototypes. The chapter summarizes the current state of integrated wearable systems based on flexible fiber/yarn SCs and other 1D device with an emphasis on design and fabrication. It presents the future development and key technical challenges of fiber/yarn-based flexible SCs. Carbolic fiber/yarn-based SC, metallic fiber/yarn-based SC, and hybrid conductive fiber/yarn-based SC are some of the intrinsic conductive fibers/yarns. Supercapacitors with intrinsic nonconductive fiber/yarn are fiber/yarn modified by carbon materials, and fiber/yarn modified by metallic materials. A number of fiber/yarn-based SC prototypes are used to fabricate large-scale electronic textiles when acting as high-performance energy storage devices.