Physico-Chemical Properties of LiFSI Solutions I. LiFSI with Valeronitrile, Dichloromethane, 1,2-Dichloroethane, and 1,2-Dichlorobenzene

  1. Johannes Neuhaus
  2. Erik von Harbou
  3. Hans Hasse

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Description: Lithium bis(fluorosulfonyl)imide (LiFSI) is a novel electrolyte for lithium-ion batteries. Valeronitrile (VN) is a good solvent for LiFSI, and dichloromethane (DCM), 1,2-dichloroethane (DCE), and 1,2-dichlorobenzene (DCB), are interesting antisolvents for crystallization. Physico-chemical data for the design of LiFSI production processes, in which these components are used, is lacking. Therefore, the solubility of LiFSI in VN, as well as in binary solvent mixtures VN + (DCM, DCE, DCB) was measured at temperatures between 278 and 343 K and concentrations of LiFSI up to 0.52 mol mol(-1). Furthermore, vapor-liquid equilibria of the systems VN-DCE (at 200 mbar) and VN-DCB (at 200, 300, and 450 mbar) were studied. Also, the density and shear viscosity of solutions of LiFSI in VN were measured at temperatures between 293 and 333 K and concentrations of LiFSI up to 0.5 mol mol(-1).

License: CC-By Attribution 4.0 International


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