Preparation And Properties Of Task-special Ionic Liquids/Ionic Liquid Hybrids And Their Application In Supercapacitor

Ionic liquid （ILs） are a new class of green material with unique physical-chemicalproperties, which have widespread potential for practical applications for many areas.How to synthesize some task-special ILs （TSILs） and research their physicochemicalproperties is an important basis on whether ILs can continue to develop. In this paper,we focus on the preparation、physicochemical properties and photoluminescenceproperites of TSILs/IL hybrids and their application in Supercapacitor. The maincontents are as follows:（1） Two new amino acid ionic liquids （AAILs）1-butyl-3-methylimidazoliumglutamine （[Bmim][Glu]） and1-butyl-3-methylimi-dazolium aspartate （[Bmim][Asp]）was prepared by a neutralization method. The density, surface tension and electricalconductivity of these two AAILs were determined at different temperatures. By specificempirical or semiempirical methods, the physicochemical properties like standard molarentropy, the lattice energy, enthalpy of vaporization, thermal expansion coefficients andso on were estimated or predicted. We further discussed the differences between thsestwo AAILs, which provided a valuable reference for the further development ofAAILs.（2） A new mixed IL-based electrolyte was synthesized from the hydrophobic ionicliquid1-ethyl-3-methylimidazolium hexafluorophosphate （[Emim][PF₆]） and organicelectrolyte—spiro cyclic quaternary ammonium salt （[（C4H8）2NBF4]） by adjustingdifferent molar ratio. This may provide a promising method for the application of IL insupercapacitors.（3） A fluorescent carbon nanoparticle ionic liquid hybrids （CNPIL） wassynthesized by a facile one-step microwave method from Glucose. This CNPIL exhibitsexcellent dispersibility in organic or aqueous solvents, high conductivity and strongphotoluminescence （PL） and excellent up conversion PL. The PL of CNPIL is pH dependent and can be controlled by adjusting the water content of reaction solution.（4） The CNPIL was synthesized from the [Emim][PF₆] and fructose by a facileone-step microwave synthetic method. Combining the CNPIL with activated carbonobtained a novel CNPIL/AC electrode. Since adding the high electrical conductivity、large charge-storage and excellent dissolvability of CNPIL, the CNPIL/AC electrodehas obviously improved wettability, less insulating binder and more conductivesubstance, which can improve supercapacitor performance significantly. This mayprovide a promising technique for the fabrication of high-performance supercapacitors.