Continuous carbon nanofiber bundles with tunable pore structures and functions for weavable fibrous supercapacitors

Abstract

Fiber supercapacitors weavable into smart textiles have attracted great attention. The key to fabricating such energy storage devices is to develop flexible fiber-like electrodes with tunable functionalities and low production cost. Here, we present an efficient strategy for the roll-to-roll mass production of carbonaceous nanofiber yarns with tunable pore structures and functions. Our protocol combines a modified electrospinning technique with a pyrolysis procedure, thereby using economic polymers as precursors. The as obtained fiber supercapacitors exhibit a remarkably high length-specific capacitance and excellent rate capability, demonstrating their great potential as smart textiles with energy storage functions.