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

Source: [Suppressed self-discharge of an aqueous supercapacitor using Earth-abundant materials](<https://www.sota2.com/research/paper/68fa3c1e1e209131ce8d80d2>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T00:57:48.824Z

Authors: Samuel Devese, Thomas Nann

Published: 2020-06-03T00:16:19.000Z

## Abstract

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 hours determined by galvanostatic charge/discharge curve measurements. This charge retention was an enhancement of $\\sim$350% compared with electrodes without zeolite coating.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2006.01989>)

[PDF](<https://arxiv.org/pdf/2006.01989.pdf>)