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Method for preparing LiAlCl4/Socl2 electrolyte for lithium cell

A technology of electrolyte and lithium battery, which is applied in the field of preparation of LiAlCl4/SOCl2 electrolyte for lithium batteries, can solve the problems of reduced safety performance, accident-prone, content reduction, etc., and achieve good electrical performance and safety performance, and safe production and operation , the effect of stable concentration

Inactive Publication Date: 2004-06-30
CNNC JIANZHONG NUCLEAR FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since LiAlCl 4 / SOCl 2 The solution is heated to reflux at high temperature, which is easy to make SOCl 2 Decompose, volatilize, generate other substances, change the concentration of the electrolyte of the finished product, increase impurities, SOCl 2 The content is reduced; the lithium battery perfused and produced with it has reduced electrical performance and safety performance, and often fails to meet the qualified requirements
Moreover, the production operation of high-temperature heating and reflow is extremely unsafe, which is harmful to workers and the environment, and is prone to accidents.

Method used

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Embodiment Construction

[0010] Below in conjunction with embodiment the present invention is further described. However, the present invention should not be construed as being limited in any way by the following specific examples.

[0011] A specific embodiment of the present invention is a lithium battery LiAlCl 4 / SOCl 2 The preparation method of electrolyte comprises LiAlCl 4 Soluble in SOCl 2 Preparation of LiAlCl 4 / SOCl 2 The dissolution step of the solution, and then the LiAlCl 4 / SOCl 2 The moisture content of the solution is reduced to the water removal step below 100PPM, etc., and the water removal step is: in a closed dry environment, to LiAlCl 4 / SOCl 2 Add the reaction amount of metal Li into the solution, and stir until the solution has no gas generation. After sealing, the finished electrolyte solution is ready for use.

[0012] Stirring in the water removal step is carried out using a magnetic stirrer, and the magnetic stirring bar of the magnetic stirrer is placed in LiAlCl...

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Abstract

The steps for water removal are as follows. Under enclosed and dry environment, with metal Li in reacting weight being added to, LiAlCl4 / SOCl2 solution is agitated till no gas is generated in the solution. Advantages are: safe and convenient operation, stable density of electrolyte, and little impurity. Lithium battery with the said electrolyte being filled possesses good electrical property and safety performance.

Description

Technical field [0001] The present invention relates to a kind of preparation method of electrolyte solution for lithium battery, especially relates to a kind of LiAlCl for lithium battery 4 / SOCl 2 Electrolyte preparation method. Background technique [0002] LiAlCl for existing lithium batteries 4 / SOCl 2 The preparation method of the electrolyte is to use LiAlCl 4 (Lithium chloride aluminum salt) dissolved in SOCl according to the specified concentration 2 (Thionyl chloride) to produce LiAlCl 4 / SOCl 2 (lithium-thionyl chloride) solution, and then use heating and reflux to remove water, so that the water content of the solution is reduced to below 100PPM to obtain a finished product. Since LiAlCl 4 / SOCl 2 The solution is heated to reflux at high temperature, which is easy to make SOCl 2 Decompose, volatilize, generate other substances, change the concentration of the electrolyte of the finished product, increase impurities, SOCl 2 The content is reduced; the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0563H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 汪以道刘宇靖
Owner CNNC JIANZHONG NUCLEAR FUEL