Appalled ! The battery electrolyte actually has at least 7 components

Appalled ! The battery electrolyte actually has at least 7 components

The main components of lithium-ion battery electrolyte and precautions for use

Summary

Lithium battery electrolyte is generally composed of lithium salt and organic solvent. The electrolyte plays a role in conducting ions between the positive and negative electrodes of lithium batteries, which is the guarantee for lithium-ion batteries to obtain the advantages of high voltage and high specific energy. Advanced electrolyte technology enhances the efficiency of electric car batteries. The electrolyte is generally prepared from high-purity organic solvents, electrolyte lithium salts, necessary additives and other raw materials under certain conditions and in certain proportions.

There are seven important components of lithium-ion battery electrolyte:

Ethylene carbonate: Molecular formula: C3H4O3, transparent colorless liquid (>35℃), crystalline solid at room temperature, and a good solvent for polyacrylonitrile and polyvinyl chloride.

Propylene carbonate, colorless and odorless, or light yellow transparent liquid, soluble in water and carbon tetrachloride, miscible with ether, acetone, benzene, etc. This product should be stored in a cool, ventilated, dry place, away from fire sources, and should be stored and transported in accordance with general regulations for low-toxic chemicals.

Diethyl carbonate, colorless liquid, slightly odorous; vapor pressure 1.33kPa/23.8℃; flash point 25℃ (flammable liquid can volatilize into vapor and escape into the air.

Dimethyl carbonate is a non-toxic, environmentally friendly and widely used chemical raw material; it also has a high evaporation temperature and a fast evaporation rate.

Methyl ethyl carbonate, a colorless and transparent liquid, is a high-tech, high value-added chemical product that has emerged in recent years. An excellent solvent for lithium-ion battery electrolytes. This product should be stored in a cool, ventilated, dry place, and should be stored and transported according to the regulations on flammable chemicals.

Lithium hexafluorophosphate, white crystal or powder, is deliquescent and decomposes when exposed to air or heated. Lithium hexafluorophosphate decomposes rapidly due to the use of water vapor in the air when exposed to air or heated, releasing PF5 and causing white smoke.

Extreme temperatures can degrade the quality of battery electrolyte
Extreme temperatures can degrade the quality of battery electrolyte

Precautions when using lithium battery electrolyte

The electrolyte barrel is protected by argon gas and has a certain pressure. Do not disassemble the gas phase valve head and liquid phase valve head during use, and do not press the protruding head of the quick-open joint at will to avoid leakage or other dangers. Be sure to wear protective goggles when taking over, and be sure to use special quick-open connectors when using.

It is recommended to use up the qualified lithium-ion battery electrolyte at one time. The unopened electrolyte can easily deteriorate due to lack of atmosphere protection and other reasons. Customers are requested to pay attention to timely filling of argon gas for protection during use to prevent discoloration of the electrolyte. It is not recommended to use glassware to hold the electrolyte. The important component of glass is silicon oxide. Silicon oxide reacts with hydrofluoric acid to form silicon tetrafluoride, a corrosive and volatile gas. This gas is toxic and can cause harm to humans.

Electrolyte containers and pipe materials that can be used on site include: stainless steel, plastic PP/PE, tetrafluoroethylene, etc.

This product is harmful to the human body and has mild irritation and anesthetic uses. Avoid direct body contact during use.

Lithium-ion battery electrolyte has gradually replaced imported products since entering the market in 2002. The product quality of lithium-ion battery electrolyte is also constantly improving and improving. Its market development prospects are still very broad. Although the ionic conductivity of solid electrolytes at this stage cannot match that of carbonate liquid electrolytes, solid electrolytes are still one of the mainstream research and development directions for future lithium-ion battery electrolytes. Electrolyte advancements catalyze breakthroughs in energy technology.

Proper maintenance ensures the longevity of battery electrolyte
Proper maintenance ensures the longevity of battery electrolyte

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