Energy storage in structural composites by introducing CNT fiber/polymer electrolyte interleaves

Scientific Reports
Evgeny SenokosJuan J Vilatela

Abstract

This work presents a method to produce structural composites capable of energy storage. They are produced by integrating thin sandwich structures of CNT fiber veils and an ionic liquid-based polymer electrolyte between carbon fiber plies, followed by infusion and curing of an epoxy resin. The resulting structure behaves simultaneously as an electric double-layer capacitor and a structural composite, with flexural modulus of 60 GPa and flexural strength of 153 MPa, combined with 88 mF/g of specific capacitance and the highest power (30 W/kg) and energy (37.5 mWh/kg) densities reported so far for structural supercapacitors. In-situ electrochemical measurements during 4-point bending show that electrochemical performance is retained up to fracture, with minor changes in equivalent series resistance for interleaves under compressive stress. En route to improving interlaminar properties we produce grid-shaped interleaves that enable mechanical interconnection of plies by the stiff epoxy. Synchrotron 3D X-ray tomography analysis of the resulting hierarchical structure confirms the formation of interlaminar epoxy joints. The manuscript discusses encapsulation role of epoxy, demonstrated by charge-discharge measurements of composites i...Continue Reading

Citations

Feb 12, 2019·Chemical Society Reviews·Abolhassan NooriMir F Mousavi
Dec 7, 2018·Scientific Reports·Nitin MuralidharanCary L Pint
Mar 7, 2021·Polymers·I Jénnifer GómezNuria Alegret
Apr 3, 2021·Environmental Science and Pollution Research International·Moses Ebiowei YiboweiOludaisi Adekomaya
Nov 14, 2018·Nano Letters·Chuanzhe MengCary L Pint
Aug 29, 2019·ACS Omega·Shanmugasundaram KamalakannanMajdi Hochlaf

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