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Keywords:

  • electric double-layer capacitor;
  • coaxial;
  • fiber;
  • flexible;
  • stretchable
Thumbnail image of graphical abstract

A coaxial electric double-layer capacitor fiber is developed from the aligned carbon nanotube fiber and sheet, which functions as two electrodes with a polymer gel sandwiched between them. The unique coaxial structure enables a rapid transportation of ions between the two electrodes with a high electrochemical performance. These energy storage fibers are also flexible and stretchable, and can be woven into and widely used for electronic textiles.