Spinning Solid and Hollow Polymer‐Free Carbon Nanotube Fibers

Abstract

Polymer-free carbon nanotube fibers are spun from aqueous dispersions using a flocculation-based process that was developed. It produces hollow fibers, folded ribbon fibers, and solid fibers (see Figure). The fibers spun from single-walled nanotubes exhibit relatively high electrical conductivities (∼140 S cm–1 at room temperature) and electrochemical capacitances (∼100 F g–1) after annealing. Fiber supercapacitors are made from the spun fibers.