Batteries can be seen everywhere in our daily lives, but most people don't know what ingredients the battery electrolyte contains. Next, Hisun Company will introduce to you what ingredients the battery electrolyte contains.

1. Ethylene carbonate: Molecular formula: C3H4O3

Clear colorless liquid (>35°C), crystalline solid at room temperature. Boiling point: 248 ℃/760mmHg,243-244 ℃/740mmHg; Flash point: 160 ℃; Density: 1.3218; Refractive index: 1.4158(50 ℃); Melting point: 35-38 ℃; This product is a good solvent for polyacrylonitrile and polyvinyl chloride. It can be used as a spinning liquid on the textile; it can also be used directly as a solvent for removing acid gases and an additive for concrete; it can be used as a pharmaceutical component and raw material in medicine; it can also be used as a stabilizer for plastic foaming agent and synthetic lubricating oil; in the battery industry, it can be used as an excellent solvent for lithium battery electrolyte

2. Propylene carbonate molecular formula: C4H6O3

Colorless odorless, or light yellow transparent liquid, soluble in water and carbon tetrachloride, miscible with ether, acetone, benzene, etc. It is an excellent polar solvent. This product is mainly used for polymer operation, gas separation process and electrochemistry. In particular, it is used to absorb carbon dioxide from natural gas and synthetic ammonia raw materials in petrochemical plants, and can also be used as plasticizer, spinning solvent, olefin and aromatic hydrocarbon extractant, etc.

Toxicological data: No poisoning was found in animal experiments by oral administration or skin contact. Rat oral LD50 = 2,9000 mg/kg.

This product should be stored in a cool, ventilated, dry place, away from fire, according to the general provisions of low toxic chemicals storage and transportation.

3. Diethyl carbonate Molecular formula: C5H10O3

Colorless liquid with slight smell; Vapor pressure 1.33kPa/23.8 ℃; Flash point 25 ℃ (combustible liquid can volatilize into vapor and run into the air. As the temperature rises, the volatilization is accelerated. When the mixture of volatile vapor and air contact with the fire source can flash sparks, this short-term combustion process is called flash, and the lowest temperature at which flash occurs is called flash point. The lower the flash point, the greater the risk of fire.); Melting point -43 ℃; Boiling point 125.8 ℃; Solubility: insoluble in water, miscible in most organic solvents such as alcohols, ketones, esters, etc. Density: relative density (water = 1)1.0; Relative density (air = 1)4.07; Stability: stability; Hazard mark 7 (flammable liquid); Main uses: used as solvent and used in organic synthesis

4. Dimethyl carbonate: C3H6O3

(dimethyl carbonate,DMC), is a non-toxic, environmentally friendly performance, a wide range of uses of chemical raw materials, it is an important organic synthesis intermediates, molecular structure containing carbonyl, methyl and methoxy functional groups, with a variety of reactive properties, in the production of safe use, convenient, less pollution, easy to transport and so on. Dimethyl carbonate is a promising "green" chemical product due to its low toxicity,

DMC has excellent solubility, its melting, narrow boiling point range, high surface tension, low viscosity, small dielectric boundary electric constant, and has a higher evaporation temperature and faster evaporation rate, so it can be used as a low toxic solvent for the coating industry and the pharmaceutical industry. It can be seen from Table 1 that DMC is not only less toxic, but also has the characteristics of high flash point, low vapor pressure and high lower explosive limit in the air, so it is a green solvent with cleanliness and safety.

5. Ethyl Methyl Carbonate

Molecular weight: 104.1, density 1.00g/cm3, colorless transparent liquid, boiling point 109 ℃, melting point -55 ℃, is a high-tech, high value-added chemical product rising in recent years, an excellent solvent for lithium ion battery electrolyte, is the latest product extended with the increase of dimethyl carbonate and lithium ion battery output, because it has both methyl and ethyl, and has the characteristics of dimethyl carbonate and diethyl carbonate, it is also a solvent for specialty fragrances and intermediates. Due to the imbalance of the methyl ethyl group, the product is unstable and not suitable for long-term storage.

This product should be stored in a cool, ventilated and dry place, according to the provisions of flammable chemicals storage and transportation

6. Lithium hexafluorophosphate

White crystal or powder, relative density 1.50. Strong deliquescence; soluble in water, but also soluble in low concentrations of methanol, ethanol, acetone, carbonate and other organic solvents. It decomposes when exposed to air or when heated. When exposed to the air or when heated, lithium hexafluorophosphate rapidly decomposes in the air due to the action of water vapor, and releases PF5 to produce white smoke.

7. Phosphorus pentafluoride

Phosphorus pentafluoride (chemical formula: PF5), is a phosphorus halogen compound, phosphorus atom oxidation number 5, including a three center four electron bond. Phosphorus pentafluoride is a colorless and malodorous gas at normal temperature and pressure, which is strongly irritating to skin, eyes and mucous membranes. It is an extremely active compound that produces toxic and corrosive white fumes of hydrogen fluoride in humid air. Phosphorus pentafluoride is used as a catalyst for the polymerization reaction.

8. Hydrofluoric acid

This product is under the control of the public security department in accordance with the Regulations on the Safety Management of Hazardous Chemicals.

Colorless transparent fuming liquid. is an aqueous solution of hydrogen fluoride gas. It is weakly acidic. There is a pungent smell. It reacts with silicon and silicon compounds to generate gaseous silicon tetrafluoride, but it does not corrode plastics, paraffin, lead, gold, and platinum. It is miscible with water and ethanol. Relative density 1.298. 38.2% hydrofluoric acid is an azeotropic mixture with an azeotropic boiling point of 112.2°C. Toxic, minimal lethal dose (rat, intraperitoneal) 25mG/kG. Corrosive, can strongly corrode metal, glass and silicon containing objects. Such as inhalation of vapor or contact with the skin can form more difficult to heal the ulcer.