High-performance fiber-shaped supercapacitors using carbon fiber thread (CFT)@polyanilne and functionalized CFT electrodes for wearable/stretchable electronics

Huanyu Jin, Li Min Zhou, Chee Leung Mak, Haitao Huang, Wing Man Tang, Helen Lai Wa Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

112 Citations (Scopus)

Abstract

Fiber-shaped supercapacitor (FSC) is a promising energy storage device for wearable/stretchable electronics by virtue of its unique features such as high flexibility, knittability, small-size and lightweight. However, the energy density of most FSC devices is limited by the relatively low operating voltage. Herein, we develop a solid-state asymmetric fiber-shaped supercapacitor made of carbon fiber thread@polyaniline and functionalized carbon fiber thread electrodes with high operating voltage (1.6V). The as-prepared device shows a volumetric energy density up to 2mWhcm-3which is higher than/compatible to most reported FSCs. The maximum power density of the device is 11Wcm-3, which is comparable to typical commercial supercapacitors. Other than good rate capability, long cycle life and high volumetric capacitance, the proposed device has excellent flexibility. It can be embedded in a glove using a traditional weaving technology without degrading its capacitive performance at various bending conditions. To demonstrate the potential of our supercapacitor for stretchable electronics, we incorporate the device into a conventional elastic thread to form a stretchable supercapacitor. The capacitance of the stretchable device is well maintained even after stretching up to 100%, demonstrating its excellent stretchability. These promising results demonstrate the proposed supercapacitor has great potential as an efficient storage device for flexible and wearable electronics applications.
Original languageEnglish
Pages (from-to)662-670
Number of pages9
JournalNano Energy
Volume11
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Asymmetric fiber-shaped supercapacitor
  • Functionalized carbon fiber thread
  • Wearable/stretchable electronics

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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