Issue 40, 2015

Multifunctional high strength and high energy epoxy composite structural supercapacitors with wet-dry operational stability

Abstract

We demonstrate the fabrication of multifunctional structural supercapacitors that maintain energy storage capability under both mechanical stresses and water immersion. This is based on the infiltration of bisphenol A ionic liquid epoxy resin electrolytes infiltrated into nanoporous silicon interfaces that play the dual role of charge storage and mechanical reinforcement of the energy storage composite material. These structural composites maintain full energy storage capability (5–8 W h kg−1) under tensile stresses over 1 MPa, with nearly 100% energy retention after 4000 cycles. We observe this mechanical and charge storage performance to be preserved through extreme water immersion conditions in contrast to conventional polymer-based solid-state electrolytes that spontaneously lose mechanical integrity under water immersion conditions. As structural energy storage is required to simultaneously maintain mechanical integrity, store charge, and operate in unpackaged environments exposed to humidity and wet-dry conditions, we demonstrate the first device architecture capable of all these conditions while demonstrating energy capability near current packaged commercial supercapacitor devices.

Graphical abstract: Multifunctional high strength and high energy epoxy composite structural supercapacitors with wet-dry operational stability

Supplementary files

Article information

Article type
Communication
Submitted
30 Jul 2015
Accepted
11 Sep 2015
First published
14 Sep 2015
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2015,3, 20097-20102

Multifunctional high strength and high energy epoxy composite structural supercapacitors with wet-dry operational stability

A. S. Westover, B. Baer, B. H. Bello, H. Sun, L. Oakes, L. M. Bellan and C. L. Pint, J. Mater. Chem. A, 2015, 3, 20097 DOI: 10.1039/C5TA05922D

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