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-NTf(2)). 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-NTf(2) 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.
authors.affiliation: Department of Materials Science and Engineering, Korea University, 5-1 Anam-dong Seongbuk-gu, Seoul 136-713, South Korea.
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Kim
authors.forename: Hyun Wook
authors.initials: HW
authors.lastname: Lee
authors.forename: Meryl
authors.initials: M
authors.lastname: Stoller
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Dreyer
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Bielawski
authors.forename: Rodney S
authors.initials: RS
authors.lastname: Ruoff
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Suh
mesh_terms: D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D010087:Oxides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D013449:Sulfonamides / Q000737:chemistry; D013696:Temperature
chemical_list: C500270:1-ethyl-3-methyl-imidizolium bis((trifluoromethyl)sulfonyl)amide; D006834:Hydrazines; D007093:Imidazoles; D052578:Ionic Liquids; D010087:Oxides; D011108:Polymers; D013449:Sulfonamides; D006108:Graphite