Waterproof, Ultrahigh Areal-Capacitance, Wearable Supercapacitor Fabrics

Yu Yang, Qiyao Huang, Liyong Niu, Dongrui Wang, Casey Yan, Yiyi She, Zijian Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

201 Citations (Scopus)

Abstract

KGaA, Weinheim High-performance supercapacitors (SCs) are promising energy storage devices to meet the pressing demand for future wearable applications. Because the surface area of a human body is limited to 2 m2, the key challenge in this field is how to realize a high areal capacitance for SCs, while achieving rapid charging, good capacitive retention, flexibility, and waterproofing. To address this challenge, low-cost materials are used including multiwall carbon nanotube (MWCNT), reduced graphene oxide (RGO), and metallic textiles to fabricate composite fabric electrodes, in which MWCNT and RGO are alternatively vacuum-filtrated directly onto Ni-coated cotton fabrics. The composite fabric electrodes display typical electrical double layer capacitor behavior, and reach an ultrahigh areal capacitance up to 6.2 F cm−2at a high areal current density of 20 mA cm−2. All-solid-state fabric-type SC devices made with the composite fabric electrodes and water-repellent treatment can reach record-breaking performance of 2.7 F cm−2at 20 mA cm−2at the first charge–discharge cycle, 3.2 F cm−2after 10 000 charge–discharge cycles, zero capacitive decay after 10 000 bending tests, and 10 h continuous underwater operation. The SC devices are easy to assemble into tandem structures and integrate into garments by simple sewing.
Original languageEnglish
Article number1606679
JournalAdvanced Materials
Volume29
Issue number19
DOIs
Publication statusPublished - 17 May 2017

Keywords

  • electronic textiles
  • energy storage
  • polymer-assisted metal deposition
  • supercapacitor
  • wearable electronics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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