High temperature supercapacitors using water-in-salt electrolytes: stability above 100 °C
Lewis W. Le Fevre, Andinet Ejigu, R. Todd, Andrew J. Forsyth, Robert A. W. Dryfe
Abstract
The high temperature performance of water-in-salt electrolytes was investigated using a carbon-based electrode with commercial cell components. Supercapacitors using 21 m Li bis(trifluoromethylsulphonyl)imide (TFSI) and 21 m LiTFSI + 7 m Li trifluoromethanesulphonyl electrolytes are shown to operate at a voltage of 2 V at 100 °C and 120 °C, respectively, with gravimetric capacitances exceeding 100 F g-1.
Topics & Concepts
ElectrolyteSupercapacitorSalt (chemistry)Chemical engineeringElectrodeMaterials scienceCarbon fibersChemistryInorganic chemistryElectrochemistryComposite materialOrganic chemistryPhysical chemistryEngineeringComposite numberSupercapacitor Materials and FabricationAdvanced battery technologies researchAdvanced Battery Materials and Technologies