| 摘要 |
Lithium hexafluorophosphate (LiPF 6) solutions obtained by treating non-aqueous halide containing LiPF 6 solution with at least one calcium hydride or calcium metal as additive, is claimed, where the LiPF 6 is dissolved in at least one solvent consisting of organic nitriles or organic carbonates. Independent claims are included for: (1) producing corrosion resistant LiPF 6 solution and removing halides, preferably fluoride ions, comprising neutralizing the LiPF 6 solution and the calcium hydride or calcium metal and then separating insoluble components, where the LiPF 6 is dissolved into at least one solvent consisting of organic nitrites or carbonates; (2) Use of calcium hydride or calcium metal as an additive for the production of non-corrosive LiPF 6-solution; and (3) reducing the corrosivity of the solution in electrochemical storage devices, comprising subjecting the solutions to neutralization and the removing solids, where the neutralization is preformed with the addition of calcium hydride or calcium metal to LiPF 6-solution in the solvent consisting of organic nitriles or carbonates and then separating the solids by filtration (preferred), sedimentation, centrifuging or flotation to remove the additive and/or other substances present as a solid, preferably to remove excess of calcium fluoride, calcium hydride or calcium metal. |
