Method for producing fluorine-containing lithium compound
A technology of lithium compounds and fluorides, applied in the electrolyte of lithium batteries and lithium-ion batteries, easy to prepare LiMFx, and able to solve problems such as by-product HCl
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Embodiment 1
[0065] Under a nitrogen atmosphere, 28.69 mg (1.106 mmol) of LiF and 34.23 mg (1.105 mmol) of red phosphorus were mixed using an agate mortar. The resulting mixture was placed in a stainless steel pressure vessel with a capacity of 21 ml, the vessel was evacuated to a high vacuum, the atmosphere thereof was replaced by Ar, and the vessel was evacuated again to remove oxygen in the atmosphere.
[0066] Then, after emptying the pressure vessel again, fill it with F 2 Gas to 4atm (0.4MPa) and seal. The temperature was raised to 300°C and maintained at this temperature for 10.5 hours. Then, the pressure vessel was allowed to stand until it reached room temperature, and unreacted F was removed under reduced pressure. 2 , and replaced with Ar, after that, filled with F again 2 Gas up to 4atm, similarly heated and maintained. This operation was repeated four times, and then the container was opened in an Ar atmosphere to obtain 100.86 mg of LiPF 6 (Yield 96.08%).
Embodiment 2~5
[0068] React in the same manner as in Example 1, the difference is, use the material shown in Table 1 instead of red phosphorus (the molar number of the amount of material used is the same as the red phosphorus in Example 1), the reaction conditions The changes are shown in Table 1, and then the reaction products shown in Table 1 are obtained, and the yields are shown in Table 1.
[0069]
[0070] In any of Examples 1 to 5, the obtained reaction products were identified by X-ray diffraction, and it was confirmed that the products were the respective desired products, and there were no peaks based on other compounds.
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