A polyacrylamide hydrogel electrolyte enabled intrinsically 1000% stretchable and 50% compressible supercapacitor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Yan HUANG
  • Ming Zhong
  • Fukuan Shi
  • Xiaoying Liu
  • Yang Huang
  • Haoqing Hou
  • Xuming Xie

Detail(s)

Original languageEnglish
Journal / PublicationAngewandte Chemie - International Edition
Publication statusPublished - 19 Jun 2017

Abstract

Stretchability and compressibility of supercapacitors is an essential element of modern electronics, such as flexible, wearable devices. Widely used polyvinyl alcohol-based electrolytes are neither very stretchable nor compressible, which fundamentally limits the realization of supercapacitors with high stretchability and compressibility. A new electrolyte that is intrinsically super-stretchable and compressible is presented. Vinyl hybrid silica nanoparticle cross-linkers were introduced into polyacrylamide hydrogel backbones to promote dynamic cross-linking of the polymer networks. These cross-linkers serve as stress buffers to dissipate energy when strain is applied, providing a solution to the intrinsically low stretchability and compressibility shortcomings of conventional supercapacitors. The newly developed supercapacitor and electrolyte can be stretched up to an unprecedented 1000 % strain with enhanced performance, and compressed to 50 % strain with good retention of the initial performance.

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