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

Inactive Publication Date: 2007-03-14
SANTOKU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is also proposed that in F 2 In the presence of LiCl and PCl 5 The method of reaction (for example, see patent document 12), but still there is the problem of by-product HCl, although this method adopts the easily removed F 2 (instead of HF)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

A method for simply producing an LiMFx which is free from impurities such as HF and other by-products that adversely affect battery performance is disclosed. The method for producing a fluorine-containing lithium compound which can be represented by a certain general formula is characterized in that LiF is brought into contact with an element M (M is an element selected from the group consisting of B, P, As, Sb, Bi, V, Nb, and Ta) and / or a fluoride of the element M in the presence of fluorine gas.

Description

technical field [0001] The present invention relates to a kind of method for preparing the lithium compound containing fluorine, described lithium compound containing fluorine is represented by formula LiMF x (M represents an element selected from B, P, As, Sb, Bi, V, Nb and Ta, and x represents a number from 4 to 6), specifically, the present invention relates to an easy-to-prepare LiMF x method, the LiMF x Almost no impurities such as HF or other by-products that adversely affect battery performance. [0002] Prepared according to the present invention by the formula LiMF x The compound shown, is a very useful electrolyte, especially for lithium batteries and lithium-ion batteries. Background technique [0003] In recent years, due to the rapid spread of digital portable electronic devices such as cellular phones, portable information terminals, or notebook personal computers, the demand for energy storage devices such as lithium ion batteries ha...

Claims

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Application Information

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IPC IPC(8): C01B25/455C01G28/00C01G35/00C01G29/00C01D15/00C01G30/00C01G31/04C01G33/00C01G35/02
CPCC01D15/005C01G31/04C01G33/00C01G30/006C01G29/00C01P2006/80C01G35/02C01B25/455C01D15/04C01G28/00
Inventor 高岛正之米泽晋入江年雄竹原雅裕
Owner SANTOKU CORP
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