Ion-liquid based supercapacitors with inner gate diode-like separators

Document Type

Article

Publication Date

6-1-2019

Abstract

In order to minimize unintentional discharge, supercapacitors are interfaced with a membrane that separates the anode from the cathode—this membrane is called the separator. We focus here on separators, which are structured as electronic diode-like. We call an electrically structured separator “the gate”. Through experiments, it was demonstrated that ionic liquid-filled supercapacitors, which were interfaced with gated separators exhibited a substantial capacitance (C) increase and reduction in the equivalent series resistance (ESR) compared to cells with ordinary separators. These two attributes help to increase the energy, which is stored in a cell, since for a given cell’s voltage, the dissipated energy on the cell, UR = V2/4(ESR) and the stored energy, UC = CV2/2, would increase. These were indeed ionic diodes since the order of the diode layout mattered—the diode-like structures exhibited maximum capacitance when their p-side faced the auxiliary electrode.

Identifier

85089850251 (Scopus)

Publication Title

Chemengineering

External Full Text Location

https://doi.org/10.3390/chemengineering3020039

e-ISSN

23057084

First Page

1

Last Page

9

Issue

2

Volume

3

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