A hybrid superconcentrated electrolyte enables 2.5 V carbon-based supercapacitors
Weijian Wang, Wenjun Deng, Xusheng Wang, Yibo Li, Zhuqing Zhou, Zongxiang Hu, Mianqi Xue, Rui Li
Abstract
A hybrid solvent in salt electrolyte was developed by hybridizing aqueous and organic solvents in concentrated lithium bis(fluorosulfonyl)imide (LiFSI) salts, such an electrolyte provides an unprecedented electrochemical window of 5.35 V, which is even comparable to traditional organic electrolytes, and enables a super-stable carbon-based symmetric supercapacitor with a long life of 10 000 cycles at an operating voltage of 2.5 V.
Topics & Concepts
SupercapacitorElectrolyteElectrochemistryCarbon fibersMaterials scienceChemical engineeringElectrochemical windowNanotechnologyElectrodeChemistryIonic conductivityComposite numberComposite materialPhysical chemistryEngineeringSupercapacitor Materials and FabricationAdvanced battery technologies researchAdvancements in Battery Materials