A CORRELATION OF SOLVENT’S MOLE FRACTION TO THE SALT-REDUCED DIFFUSIVITIES OF ORGANICSOLVENTS

Supercapacitors' energy storage capabilities depend on the physical and chemical properties of the electrodes and electrolytes used. The mixing of salt with organic solvents has been adapted to formulate an electrolyte to optimize the electrochemical performances of energy-storing devices. Here, using a combination of two neutron scattering spectrometers and a molecular dynamics simulation, we have investigated the influence of lithium bis(trifluoromethylsulfonyl)amine (LiTFSI) salt on the diffusion of five different organic solvents (acetonitrile, tetrahydrofuran, methanol, dimethyl sulfoxide, and propylene carbonate). A universal reduction in the solvent diffusivity by half and its correlation with solvent mole fraction will be presented.