Suppressed self-discharge of an aqueous supercapacitor using Earth-abundant materials

Title: Suppressed self-discharge of an aqueous supercapacitor using Earth-abundant materials
Creator: Devese, Samuel; Nann, Thomas
Relation: Journal of Electroanalytical Chemistry Vol. 871, no. 114307
Publisher Link: http://dx.doi.org/10.1016/j.jelechem.2020.114307
Publisher: Elsevier
Resource Type: journal article
Date: 2020
Description: Supercapacitors (aka electrostatic double-layer capacitors−EDLCs) offer excellent power storage capacity and kinetics, but suffer under rapid self-discharge. We introduced a zeolite framework into the active capacitor electrode, with the goal to tailor the free desorption energy and thus the self-discharge rate of supercapacitors. Low-cost carbonaceous materials and benchtop production methods were used to create supercapacitor electrodes with a measured specific capacitance of 17.25 F g¯¹, a coulombic efficiency of 100%, and charge retention of over 25% over 24 h determined by galvanostatic charge/discharge curve measurements. This charge retention was an enhancement of ~350% compared with electrodes without zeolite coating.
Subject: electrostatic double-layer capacitor; supercapacitor; ultracapacitor; nanostructures; zeolites; carbon; electrochemistry
Identifier: http://hdl.handle.net/1959.13/1439255
Identifier: uon:40870
Identifier: ISSN:1572-6657
Language: eng
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