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Functionalized Agarose Self-Healing Ionogels Suitable for Supercapacitors
- Functionalized Agarose Self-Healing Ionogels Suitable for Supercapacitors
- Trivedi, Tushar J.; Bhattacharjya, Dhrubajyoti; Yu, Jong-Sung; Kumar, Arvind
- DGIST Authors
- Yu, Jong-Sung
- Issue Date
- ChemSusChem, 8(19), 3294-3303
- Article Type
- 1-Butyl-3-Methylimidazolium; 1-Butyl-3-Methylimidazolium Chloride; Acetylation; Activated Carbon; Capacitors; Carbohydrates; Carbon; Charge-Discharge Cycle; Chemistry; Electric Capacitance; Electrochemistry; Electrolytes; Electrolytic Capacitors; Functionalization; Functionalizations; Gel; Gels; Hydrogen Bonding Network; Hydrogen Bonds; Imidazole Derivative; Imidazoles; Ionic Liquid; Ionic Liquids; Liquid Electrolyte Systems; Liquids; Mechanical Processes; Mechanics; Methanol; Rheological Measurements; Self-Healing Properties; Sepharose; Solid Electrolytes; Sols; Specific Capacitance
- 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.
- Wiley-VCH Verlag
- Related Researcher
Light, Salts and Water Research Group
Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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