Carboxylic multiwalled carbon nanotube aerogel-based macroscale fiber as a highly porous current collector

Yaqin Wang, Congrui Bai, He Shi, Yingying Xu, Xiaoming Wang, Zhaoyang Fan, Huan Jiao

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Carbon nanotube yarn is a potential substance for the fabrication of fiber-shaped energy storage devices owing to its lightweight, stiffness, and excellent electrical properties. However, it has a compact structure with a limited pore volume, leading to insufficient active material loading and inadequate gel electrolyte penetration. These seriously restrict its application in fiber-shaped energy storage devices made entirely of solid-state components. Herein, glycerol-functionalized polyacrylonitrile nanofibers (GPN) are electro-spun and collected on Ti wire. And they are chosen as hydrophilic support to load carboxylic multiwalled carbon nanotubes (CMWCNTs) via dip-coating. After oxidation, a 3D rolled O-CMWCNTs@GPN/Ti aerogel fiber-shaped structure with macroscopic thickness and excellent stability in water is fabricated. The O-CMWCNTs@GPN/Ti structure has a high length-specific capacitance value of 15.2 mF cm−1 itself. It also can be used as a current collector to load pseudocapacitive materials to improve capacity. With polyaniline (PANI) electrodeposited in this structure, the as-prepared hybrid aerogel electrode PANI@O-CMWCNTs@GPN/Ti displays a high specific capacitance of 52.6 mF cm−1 in a fiber-shaped supercapacitor device. All features suggest that O-CMWCNTs@GPN/Ti aerogel is an excellent candidate for flexible fiber-shaped energy storage devices.

Original languageEnglish (US)
Article number101505
JournalComposites Communications
Volume38
DOIs
StatePublished - Feb 2023
Externally publishedYes

Keywords

  • Carboxylic multiwalled CNTs aerogel
  • Current collector
  • Electrospinning
  • Fiber-shaped supercapacitor

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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