Lithium battery electrolyte production process Lithium - Ion Battery Equipment

Lithium battery electrolyte production process -Lithium - Ion Battery Equipment

1. Preparation of solvent:
Cyclic or chain esters such as EC, DEC, PC, DMC, etc. The earliest method for preparing EC was to use ethylene glycol and phosgene reaction, but this process flow factory has been eliminated due to low yield, high cost and serious pollution. The transesterification method is used to prepare EC, the reaction speed is improved, and the yield is also improved.

2, purification:
Regarding the organic raw materials used, the purification treatment has reached the standard for the use of lithium-ion battery electrolytes. Here, the items to be tested include purity, water content, and main content.

3, LiPF6:
At present, there are four important preparation methods, namely gas-solid phase method, hydrogen fluoride solvent method, organic solvent method and ion exchange method. The gas-solid phase method has high purity, but the cost of raw materials is high, the process is too many, and continuous production is difficult. The hydrogen fluoride solvent method has a fast reaction speed and high efficiency, but the presence of HF has high requirements on the corrosion resistance of the reaction vessel. The organic solvent method prevents the occurrence of HF, and the operation is relatively safe, but PF5 still needs to be prepared and has strong corrosiveness. The ion exchange method avoids the disadvantage of using PF6 as a raw material, but the used lithium alkoxide and ammonia will react, and the raw material is expensive, making it difficult to realize industrial production.(Lithium - Ion Battery Equipment)

4. Due to the sensitivity of the electrolyte, the packaging barrels must also undergo pretreatment, water washing, argon replacement and other processes to ensure that they are dry and free of impurities.
It is important to introduce the industrial production method of lithium-ion battery electrolyte, as well as the synthesis method of some raw materials. Control is strictly required.

Based on the rapid rise of the lithium-ion battery industry, the market demand for lithium-ion battery electrolyte continues to expand, and the traditional electrolyte production process cannot meet the existing development needs.



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