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A kind of synthesis and purification method of lithium bisoxalate borate

A technology of lithium bis-oxalate borate and a synthesis method is applied in the field of synthesis and purification of lithium bis-oxalate borate, which can solve the problems of difficult industrialized production, long time consumption and the like, and achieve the effects of low cost, convenient operation and control, and few by-products.

Active Publication Date: 2016-08-24
BLUE OCEAN & BLACK STONE TECH CO LTD BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Further, the present invention also solves the technical problems that the existing method for purifying lithium bisoxalate borate takes a long time and is not easy for industrial production, and provides a method for purifying lithium bisoxalate borate

Method used

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  • A kind of synthesis and purification method of lithium bisoxalate borate
  • A kind of synthesis and purification method of lithium bisoxalate borate
  • A kind of synthesis and purification method of lithium bisoxalate borate

Examples

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Embodiment 1

[0027] Example 1 ： A method for synthesizing lithium bisoxalate borate, comprising the following steps: dispersing 63.04g of oxalic acid, 11.97g of lithium hydroxide and 30.92g of boric acid in 300mL of xylene, adding 200g of zirconium beads, fully ball milling and mixing for 3 h at normal temperature and pressure . After the reaction, the solution was filtered with suction, and the obtained solid mixture was placed in a vacuum drying oven, and the temperature was gradually raised to 120° C. for 8 h to obtain 53.4 g of a crude product.

[0028] Further, for the purification method of lithium bisoxalate borate, dissolve the above-mentioned crude product in 500mL acetone to saturation, filter to remove insoluble matter and zirconium beads; At this time, a large number of crystals were precipitated in the bottle; the solution after atmospheric distillation was suction-filtered, and the crystals were washed with cyclohexane for 3 times, and the crystals were dried in a vacuum ...

Embodiment 2

[0029] Example 2 ： A method for synthesizing lithium bisoxalate borate, comprising the following steps: dispersing 31.52g of oxalic acid, 5.99g of lithium hydroxide and 15.46g of boric acid in 150mL of benzene, adding 150g of zirconium beads, and fully ball milling and mixing for 5 hours at normal temperature and pressure. After the reaction, the solution was filtered with suction, the obtained solid mixture was placed in a vacuum drying oven, the temperature was raised to 120°C step by step, and after drying for 12 hours, 27.8 g of crude product was obtained.

[0030] Further, for the above method of purifying lithium bisoxalate borate, the crude product was dissolved in 250mL of acetonitrile to saturation, and the insolubles and zirconium beads were removed by filtration; then benzene was added to the saturated solution until precipitation occurred, and the acetonitrile was distilled off under reduced pressure. A large number of crystals were precipitated in the bottle; t...

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Abstract

The present invention provides a method of synthesis and purification of lithium biscosimate. It is based on lithium -source compounds, boron compounds and oxalic acid compounds as the main raw materials.Lithium boric acid coarse products; and through the coordination of soluble crystallization method and thermal crystalline method, effectively purify the coarse products, and make high -purity bisotramel acid borate.The invention has the advantages of high synthesis yield, high product purity, high process, simple operation control, and low cost. It can be produced in large -scale production and is suitable for industrialization.

Description

technical field [0001] The invention belongs to the technical field of lithium ions, especially lithium borate batteries, and in particular relates to a method for synthesizing and purifying lithium bisoxalate borate. Background technique [0002] Lithium-ion batteries are particularly suitable for use in electronic devices due to their high energy density and power density. Lithium-ion batteries are generally divided into non-rechargeable lithium primary batteries containing a small amount of lithium metal anode and rechargeable lead-acid batteries. These two types of battery packs contain liquid or gel conductive particle electrolytes, and their conductive salts include LiPF6, LiBF4, methyllithium, imidelithium, or lithium borates (such as lithium bisoxalate borate LiBOB), etc. These conductive Salts are all present in dissolved form. [0003] The electrolyte is an important part of the lithium battery, its performance directly affects the capacity of the battery, and de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02
CPCC07F5/022
Inventor 李强郭大京杜夕彦罗贺斌
Owner BLUE OCEAN & BLACK STONE TECH CO LTD BEIJING
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