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What is the price trend of 18650 lithium battery 3.7 v? What is its preparation process?
18650 lithium battery 3.7 v price trend
As a lithium-ion battery electrolyte, lithium hexafluorophosphate battery is mainly used in lithium-ion power batteries, lithium-ion energy storage batteries and other daily batteries. It is also an irreplaceable lithium-ion battery electrolyte in the near to medium term. 18650 lithium battery 3.7 v has moderate ion migration number, moderate dissociation constant, good antioxidant performance and good aluminum foil passivation ability in commonly used organic solvents, and can be matched with various positive and negative electrode materials, thus becoming a commercial product Lithium salt is the main electrolyte used in lithium-ion batteries.
As the most important component of lithium battery electrolyte, the price of lithium hexafluorophosphate has continued to rise recently. According to monitoring, on March 22, the quotation price of lithium hexafluorophosphate was between 90,000 and 150,000 yuan/ton. Although the average price was the same as the previous day, the high price increased by 15,000 yuan/ton from the previous day. Compared with the average price on March 19, in just a few days, the quotation of lithium hexafluorophosphate has increased by 5,000 yuan/ton.
Preparation process and application of lithium hexafluorophosphate
Lithium hexafluorophosphate is very unstable, decomposes at around 60°C, and is easily deliquescent. Generally, potassium hexafluorophosphate products are prepared in non-aqueous solvents such as anhydrous hydrogen fluoride and low alkyl ethers. Moreover, if lithium hexafluorophosphate is developed in the direction of lithium-ion batteries and power batteries, the requirements for its purity, stability, and consistency are very high. At the same time, the production process of lithium hexafluorophosphate involves harsh working conditions such as low temperature, strong corrosion, and no water and dust, making the process extremely difficult.
The preparation methods of lithium hexafluorophosphate mainly include gas-solid reaction method, organic solvent method and hydrogen fluoride solvent method. At present, the mainstream preparation method of lithium hexafluorophosphate at home and abroad is the hydrogen fluoride solvent method, which accounts for more than 80% of all industrial production methods. Large enterprises such as Japan Morita Chemical, Jinniu Chemical, Duofuo Chemical, and Jiangsu Jiujiujiu all adopt this method. This method realizes industrialized production.
Lithium batteries are the heart of new energy vehicles. The key materials of lithium batteries, such as positive and negative electrode materials, separators, and electrolytes, each profoundly affect the development of lithium battery technology. As the most basic material for electrolyte production, lithium hexafluorophosphate is easily overlooked. However, its particle size distribution and impurity content restrict the development of lithium batteries, especially the impurity content, such as sodium, potassium, iron and other metal elements, as well as sulfate and nitrate radicals. etc. are required to be less than one part per 100,000, which forces the industry to invest more in the optimization of the production process of lithium hexafluorophosphate and its raw material purification technology. Judging from the success of Polyfluorocarbon in recent years, its technical reserves for lithium extraction from salt lakes, lithium carbonate and hydrofluoric acid purification are the key to its growing strength.
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