Electromechanical Properties of Polymer Electrolyte‐Based Stretchable Supercapacitors

Abstract

Aligned carbon nanotube (CNT) forests filled with a dehydrated polymer electrolyte are used to fabricate flexible solid state supercapacitors (SSCs) for multifunctional structural‐electronic applications. Local stiffness measurements on the composite electrodes determined through nano­indentation showed an 80% increase over the neat solid polymer electrolyte matrix. Electrochemical properties are monitored as a function of average tensile strain in the SSCs. Galvanostatic charge‐discharge tests with in situ microtensile testing on SSCs are used to show a 10% increase in the specific capacitance through the elastic region of the composite. The increase in capacitance is partly attributed to the enhanced double layer interaction that results from the partial alignment of the polymer electrolyte chains at the electrode‐electrolyte interface. When soaked in 1 m sulfuric acid, the specific capacitance of the CNT‐polymer electrolyte reached approximately 72 F g–1 at 60 °C.

Document Details

Document Type
Pub Defense Publication
Publication Date
Sep 17, 2013
Source ID
10.1002/aenm.201300844

Entities

People

  • Amelia H. C. Hart
  • Arava Leela Mohana Reddy
  • Daniel P Cole
  • Mark L. Bundy
  • Myung Gwan Hahm
  • Pulickel Ajayan
  • Robert Vajtai
  • Ryan Mccotter
  • Shashi P. Karna

Organizations

  • Rice University
  • United States Army Research Laboratory
  • United States Department of Defense

Tags

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Materials Science and Engineering.
  • Nanocomposite Materials Science

Technology Areas

  • Microelectronics