-(3)Analysis of the Important Components of Electrolyte in Lithium Ion Battery Pack

(3)Analysis of the Important Components of Electrolyte in Lithium Ion Battery Pack
author:enerbyte source:本站 click405 Release date: 2023-06-26 08:48:01
abstract:
Carbonate and Carboxylate ester: the mixed solvent of the two can make the charging process of the lithium ion battery pack, and the negative electrode can form high SEI Membrane potential, prevent solvent reduction, ensure the safety of the battery, and improve the capacity retention rate of...

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Carbonate and Carboxylate ester: the mixed solvent of the two can make the charging process of the lithium ion battery pack, and the negative electrode can form high SEI Membrane potential, prevent solvent reduction, ensure the safety of the battery, and improve the capacity retention rate of the low-temperature battery and the high rate charge discharge capacity.

Analysis of lithium salts commonly used in lithium-ion battery electrolytes

LibF4: Mild Lewis acid for Diels Alder reaction; Ethylene oxide ammonolysis catalyst. Low temperature function is good, but it is expensive and has low solubility.

LiPF6: LiPF6 is a white granular or powdered solid with different forms, flowability, and solubility. It is easy to distinguish at high temperatures, starting in dry nitrogen gas (N2) at 160 ℃ and starting in air at 70 ℃. LiPF6 has strong corrosiveness to the skin and requires acid and alkali resistant gloves. The overall performance is good, but the disadvantage is that it is easy to hydrolyze and absorb water.

LiClO4: lithium chlorate, also known as lithium chlorate, is colorless crystal with delirium. Explosive mixtures can be mixed with reducing agents, organic compounds, flammable substances such as sulfur, phosphorus, or metal powders. The overall function is good, but strong oxidation leads to low safety.

Lithium borate: also known as Lithium borate diethyl ester, with purity of 99% and appearance of white powder. The high-temperature function is good, especially in simulating the insertion damage of the negative electrode to the solvent, but the solubility is too low.

Analysis of Common Additives in Lithium Ion Battery Electrolytes

Conductive additives

Solid electrolyte membranes have organic solvent incompatibility, allowing lithium ions to freely enter and exit the electrode without crossing with solvent molecules, thereby preventing damage caused by co insertion of solvent molecules on the electrode and improving the cycling power and reversibility of the battery. It is mainly divided into inorganic film forming additives and organic film forming additives.

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