High-performance supercapacitors based on poly(ionic liquid)-modified graphene electrodes

Tae Young Kim; Hyun Wook Lee; Meryl Stoller; Daniel R. Dreyer; Christopher W. Bielawski; Rodney S. Ruoff; Kwang S. Suh

doi:10.1021/nn101968p

High-performance supercapacitors based on poly(ionic liquid)-modified graphene electrodes

Tae Young Kim, Hyun Wook Lee, Meryl Stoller, Daniel R. Dreyer, Christopher W. Bielawski, Rodney S. Ruoff, Kwang S. Suh

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

620 Citations (Scopus)

Abstract

We report a high-performance supercapacitor incorporating a poly(ionic liquid)-modified reduced graphene oxide (PIL:RG-O) electrode and an ionic liquid (IL) electrolyte (specifically, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide or EMIM-NTf₂). PIL:RG-O provides enhanced compatibility with the IL electrolyte, thereby increasing the effective electrode surface area accessible to electrolyte ions. The supercapacitor assembled with PIL:RG-O electrode and EMIM-NTf₂ electrolyte showed a stable electrochemical response up to 3.5 V operating voltage and was capable of yielding a maximum energy density of 6.5 W · h/kg with a power density of 2.4 kW/kg. These results demonstrate the potential of the PIL:RG-O material as an electrode in high-performance supercapacitors.

Original language	English
Pages (from-to)	436-442
Number of pages	7
Journal	ACS nano
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/nn101968p
Publication status	Published - 2011 Jan 25

Keywords

Electrical double layers
Graphene
Ionic liquids
Supercapacitors
Thermal reduction
Ultracapacitors

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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title = "High-performance supercapacitors based on poly(ionic liquid)-modified graphene electrodes",

abstract = "We report a high-performance supercapacitor incorporating a poly(ionic liquid)-modified reduced graphene oxide (PIL:RG-O) electrode and an ionic liquid (IL) electrolyte (specifically, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide or EMIM-NTf2). PIL:RG-O provides enhanced compatibility with the IL electrolyte, thereby increasing the effective electrode surface area accessible to electrolyte ions. The supercapacitor assembled with PIL:RG-O electrode and EMIM-NTf2 electrolyte showed a stable electrochemical response up to 3.5 V operating voltage and was capable of yielding a maximum energy density of 6.5 W · h/kg with a power density of 2.4 kW/kg. These results demonstrate the potential of the PIL:RG-O material as an electrode in high-performance supercapacitors.",

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AU - Kim, Tae Young

AU - Lee, Hyun Wook

AU - Stoller, Meryl

AU - Dreyer, Daniel R.

AU - Bielawski, Christopher W.

AU - Ruoff, Rodney S.

AU - Suh, Kwang S.

PY - 2011/1/25

Y1 - 2011/1/25

N2 - We report a high-performance supercapacitor incorporating a poly(ionic liquid)-modified reduced graphene oxide (PIL:RG-O) electrode and an ionic liquid (IL) electrolyte (specifically, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide or EMIM-NTf2). PIL:RG-O provides enhanced compatibility with the IL electrolyte, thereby increasing the effective electrode surface area accessible to electrolyte ions. The supercapacitor assembled with PIL:RG-O electrode and EMIM-NTf2 electrolyte showed a stable electrochemical response up to 3.5 V operating voltage and was capable of yielding a maximum energy density of 6.5 W · h/kg with a power density of 2.4 kW/kg. These results demonstrate the potential of the PIL:RG-O material as an electrode in high-performance supercapacitors.

AB - We report a high-performance supercapacitor incorporating a poly(ionic liquid)-modified reduced graphene oxide (PIL:RG-O) electrode and an ionic liquid (IL) electrolyte (specifically, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide or EMIM-NTf2). PIL:RG-O provides enhanced compatibility with the IL electrolyte, thereby increasing the effective electrode surface area accessible to electrolyte ions. The supercapacitor assembled with PIL:RG-O electrode and EMIM-NTf2 electrolyte showed a stable electrochemical response up to 3.5 V operating voltage and was capable of yielding a maximum energy density of 6.5 W · h/kg with a power density of 2.4 kW/kg. These results demonstrate the potential of the PIL:RG-O material as an electrode in high-performance supercapacitors.

KW - Electrical double layers

KW - Graphene

KW - Ionic liquids

KW - Supercapacitors

KW - Thermal reduction

KW - Ultracapacitors

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High-performance supercapacitors based on poly(ionic liquid)-modified graphene electrodes

Abstract

Keywords

ASJC Scopus subject areas

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