The inside-out supercapacitor: induced charge storage in reduced graphene oxide

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Iontronic circuits are built using components which are analogous to those used in electronic circuits, however they involve the movement of ions in an electrolyte rather than electrons in a metal or semiconductor. Developments in these circuits’ performance have led to applications in biological sensing, interfacing and drug delivery. While transistors, diodes and elementary logic circuits have been demonstrated for ionic circuits if more complex circuits are to be realized, the precident set by electrical circuits suggests that a component which is analogous to an electrical capacitor is required. Herein, an ionic supercapacitor is reported, our experiments show that charge may be stored in a conductive porous reduced graphene oxide film that is contacted by two isolated aqueous solutions and that this concept extends to an arbitrary polarizable sample. Parametric studies indicate that the conductivity and porosity of this film play important roles in the resultant device’s performance. This ionic capacitor has a specific capacitance of 8.6 F cm3 at 1 mV s1 and demonstrates the ability to filter and smooth signals in an electrolyte at a variety of low frequencies. The device has the same interfaces as a supercapacitor but their arrangement is changed, hence the name inside-out supercapacitor.
Original languageEnglish
Pages (from-to)32185-32191
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume18
DOIs
Publication statusPublished - 2016

Cite this

@article{e73437c267dd4cc8a04f067979b6c96e,
title = "The inside-out supercapacitor: induced charge storage in reduced graphene oxide",
abstract = "Iontronic circuits are built using components which are analogous to those used in electronic circuits, however they involve the movement of ions in an electrolyte rather than electrons in a metal or semiconductor. Developments in these circuits’ performance have led to applications in biological sensing, interfacing and drug delivery. While transistors, diodes and elementary logic circuits have been demonstrated for ionic circuits if more complex circuits are to be realized, the precident set by electrical circuits suggests that a component which is analogous to an electrical capacitor is required. Herein, an ionic supercapacitor is reported, our experiments show that charge may be stored in a conductive porous reduced graphene oxide film that is contacted by two isolated aqueous solutions and that this concept extends to an arbitrary polarizable sample. Parametric studies indicate that the conductivity and porosity of this film play important roles in the resultant device’s performance. This ionic capacitor has a specific capacitance of 8.6 F cm3 at 1 mV s1 and demonstrates the ability to filter and smooth signals in an electrolyte at a variety of low frequencies. The device has the same interfaces as a supercapacitor but their arrangement is changed, hence the name inside-out supercapacitor.",
author = "Sam Martin and Abozar Akbari and {Chakraborty Banerjee}, Parama and Adrian Neild and Mainak Majumder",
year = "2016",
doi = "10.1039/c6cp06463a",
language = "English",
volume = "18",
pages = "32185--32191",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "The Royal Society of Chemistry",

}

The inside-out supercapacitor : induced charge storage in reduced graphene oxide. / Martin, Sam; Akbari, Abozar; Chakraborty Banerjee, Parama; Neild, Adrian; Majumder, Mainak.

In: Physical Chemistry Chemical Physics, Vol. 18, 2016, p. 32185-32191.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The inside-out supercapacitor

T2 - induced charge storage in reduced graphene oxide

AU - Martin, Sam

AU - Akbari, Abozar

AU - Chakraborty Banerjee, Parama

AU - Neild, Adrian

AU - Majumder, Mainak

PY - 2016

Y1 - 2016

N2 - Iontronic circuits are built using components which are analogous to those used in electronic circuits, however they involve the movement of ions in an electrolyte rather than electrons in a metal or semiconductor. Developments in these circuits’ performance have led to applications in biological sensing, interfacing and drug delivery. While transistors, diodes and elementary logic circuits have been demonstrated for ionic circuits if more complex circuits are to be realized, the precident set by electrical circuits suggests that a component which is analogous to an electrical capacitor is required. Herein, an ionic supercapacitor is reported, our experiments show that charge may be stored in a conductive porous reduced graphene oxide film that is contacted by two isolated aqueous solutions and that this concept extends to an arbitrary polarizable sample. Parametric studies indicate that the conductivity and porosity of this film play important roles in the resultant device’s performance. This ionic capacitor has a specific capacitance of 8.6 F cm3 at 1 mV s1 and demonstrates the ability to filter and smooth signals in an electrolyte at a variety of low frequencies. The device has the same interfaces as a supercapacitor but their arrangement is changed, hence the name inside-out supercapacitor.

AB - Iontronic circuits are built using components which are analogous to those used in electronic circuits, however they involve the movement of ions in an electrolyte rather than electrons in a metal or semiconductor. Developments in these circuits’ performance have led to applications in biological sensing, interfacing and drug delivery. While transistors, diodes and elementary logic circuits have been demonstrated for ionic circuits if more complex circuits are to be realized, the precident set by electrical circuits suggests that a component which is analogous to an electrical capacitor is required. Herein, an ionic supercapacitor is reported, our experiments show that charge may be stored in a conductive porous reduced graphene oxide film that is contacted by two isolated aqueous solutions and that this concept extends to an arbitrary polarizable sample. Parametric studies indicate that the conductivity and porosity of this film play important roles in the resultant device’s performance. This ionic capacitor has a specific capacitance of 8.6 F cm3 at 1 mV s1 and demonstrates the ability to filter and smooth signals in an electrolyte at a variety of low frequencies. The device has the same interfaces as a supercapacitor but their arrangement is changed, hence the name inside-out supercapacitor.

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