| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing lithium difluorophosphate efficiently and easily without using a solvent.SOLUTION: There is provided a method for producing lithium difluorophosphate by reacting lithium hexafluorophosphate, a chloride ans water without using a solvent. Specifically, the method comprises: (1) a step of mixing lithium hexafluorophosphate and a chloride and a step of reacting the resulting mixture with water without using a solvent; or (2) a step of preparing a hydrate by bringing a chloride into contact with water and a step of reacting the hydrate with lithium hexafluorophosphate without using a solvent. It is preferable that the chloride is selected from the group consisting of an alkali metal salt, an alkaline earth metal and aluminum chloride, the molar ratio between lithium hexafluorophosphate and water is 1:1.0 to 1:4.0 and the molar ratio between lithium hexafluorophosphate and the chloride is 1:3.6 to 1:4.4. |
