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Functionalized Agarose Self-Healing Ionogels Suitable for Supercapacitors

Title
Functionalized Agarose Self-Healing Ionogels Suitable for Supercapacitors
Authors
Trivedi, TJ[Trivedi, Tushar J.]Bhattacharjya, D[Bhattacharjya, Dhrubajyoti]Yu, JS[Yu, Jong-Sung]Kumar, A[Kumar, Arvind]
DGIST Authors
Bhattacharjya, D[Bhattacharjya, Dhrubajyoti]; Yu, JS[Yu, Jong-Sung]
Issue Date
2015-10-12
Citation
ChemSusChem, 8(19), 3294-3303
Type
Article
Article Type
Article
Keywords
1-Butyl-3-Methylimidazolium1-Butyl-3-Methylimidazolium ChlorideAcetylationActivated CarbonCapacitorsCarbohydratesCarbonCharge-Discharge CycleChemistryElectric CapacitanceElectrochemistryElectrolytesElectrolytic CapacitorsFunctionalizationFunctionalizationsGelGelsHydrogen Bonding NetworkHydrogen BondsImidazole DerivativeImidazolesIonic LiquidIonic LiquidsLiquid Electrolyte SystemsLiquidsMechanical ProcessesMechanicsMethanolRheological MeasurementsSelf-Healing PropertiesSepharoseSolid ElectrolytesSolsSpecific Capacitance
ISSN
1864-5631
Abstract
Agarose has been functionalized (acetylated/carbanilated) in an ionic liquid (IL) medium of 1-butyl-3-methylimidazolium acetate at ambient conditions. The acetylated agarose showed a highly hydrophobic nature, whereas the carbanilated agarose could be dissolved in water as well as in the IL medium. Thermoreversible ionogels were obtained by cooling the IL sols of carbanilated agarose at room temperature. The ionogel prepared from a protic-aprotic mixed-IL system (1-butyl-3-methylimidazolium chloride and N-(2-hydroxyethyl)ammonium formate) demonstrated a superior self-healing property, as confirmed from rheological measurements. The superior self-healing property of such an ionogel has been attributed to the unique inter-intra hydrogen-bonding network of functional groups inserted in the agarose. The ionogel was tested as a flexible solid electrolyte for an activated-carbon-based supercapacitor cell. The measured specific capacitance was found to be comparable with that of a liquid electrolyte system at room temperature and was maintained for up to 1000 charge-discharge cycles. Such novel functionalized-biopolymer self-healing ionogels with flexibility and good conductivity are desirable for energy-storage devices and electronic skins with superior lifespans and robustness. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
http://hdl.handle.net/20.500.11750/2834
DOI
10.1002/cssc.201500648
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Yu, Jong Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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Collection:
ETC1. Journal Articles


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