Formula and preparation method of environment-friendly lithium battery electrolyte

Abstract

The invention discloses a formula and a preparation method of an environment-friendly lithium battery electrolyte. The lithium battery electrolyte is prepared from the following raw materials in parts by weight: 15-20 parts of ethylene carbonate, 15-20 parts of propylene carbonate, 10-20 parts of butylene carbonate, 10-15 parts of methyl formate, 8-14 parts of ethyl formate, 8-14 parts of butyl formate, 15-20 parts of deionized water, 4-8 parts of lithium perchlorate, 5-10 parts of lithium oxalyldifluoroborate, 6-10 parts of lithium bis(oxalato)borate, 2-4 parts of phenylcyclohexane, 1-4 parts of hydrogenated terphenyl, 1-4 parts of vinylene carbonate, 2-6 parts of hydroxyethyl cellulose, 0.8-1.2 parts of poly-ethylenedioxythiophene and 1.2-1.6 parts of polyaniline. By taking multiple kinds of organic solvents as the main solvents of the electrolyte, the obtained battery can be green, environment friendly and harmless; and by virtue of the stability additives hydroxyethyl cellulose, poly-ethylenedioxythiophene, polyaniline and the like added to the electrolyte, the chemical component stability of the electrolyte can be improved, and the service life of the battery can be greatly prolonged.

Description

technical field [0001] The invention mainly relates to a formula of an environment-friendly lithium battery electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion battery is the rechargeable chemical battery with the best technical performance in the world. It has the advantages of high working voltage, large specific energy, long cycle life, small self-discharge, no memory effect, and no pollution. It is widely used in mobile communications, notebooks, etc. Computers, portable tools, electric bicycles and other fields are gradually replacing traditional lead-acid batteries and becoming mainstream batteries in the market. As an important part of lithium-ion batteries, electrolyte research is of great significance to improve the production technology level of lithium-ion batteries. The electrolyte of lithium-ion batteries is generally divided into two types: liquid electrolyte and gel electrolyte. Among them, the liquid electrolyte has better...

AI Technical Summary

Problems solved by technology

The electrolyte of lithium-ion batteries is generally divided into two types: liquid electrolyte and gel electrolyte. Among them, the liquid electrolyte has better electrochemical performance, but its safety is poor, and it is prone to leakage and poor temperature characteristics.

The gel electrolyte system fixes the free solvent molecules in the polymer gel framework, and there is no or less free solvent, so it is not easy to cause liquid leakage and greatly reduces the flammability of the system, so it has good performance. Safe, but its chemical properties are not as good as liquid electrolytes