Novel lithium ion battery electrolyte

Abstract

The invention relates to the technical filed of battery electrolyte and particularly discloses novel lithium ion battery electrolyte. The lithium ion battery electrolyte can be prepared by adding an organic solvent mixed by acylester organic compounds in the general lithium ion battery electrolyte, adding 1-10 percent of addictive and chemically compounding with 8-15 percent of conductive lithiumsalt, wherein the addition amount of the acylester organic solvent is 75-90 percent of the weight of the lithium ion battery electrolyte. The lithium ion battery electrolyte can simultaneously meet the requirement of a lithium battery on the high-low temperature performances.

Description

technical field [0001] The invention relates to the technical field of battery electrolytes, and specifically discloses a novel lithium-ion battery electrolyte. Background technique [0002] As a new energy source, lithium-ion battery has attracted more and more people's attention, and has become one of the high-tech priorities, and is making important progress. Since the 1990s, due to its unique advantages such as high specific energy, high working voltage, wide application range, low self-discharge rate, long cycle life, no pollution, and good safety performance, it has been widely used as a home appliance Electrical appliances such as mobile phones, notebook computers, video cameras, cameras and other power supplies have gradually replaced traditional batteries in the fields of aviation, aerospace, navigation, artificial satellites, small medical instruments and military communication equipment. Therefore, lithium-ion batteries play an important role in modern electrochem...

AI Technical Summary

Problems solved by technology

[0003] However, due to factors such as the working temperature range of the lithium-ion battery electrolyte, its application range is limited. , the discharge capacity of the battery is only 62% of that at room temperature, and the discharge capacity at -40°C is less than 10% of that at room temperature; the electrolyte used in low temperature type produces a large amount of gas at a high temperature of 60°C, and the remaining capacity and recoverable capacity Less than 60%, which greatly limits the application range of lithium-ion batteries

[0004]The existing lithium-ion battery electrolyte is a mixture of the following carbonate organic solvents, such as: ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), vinylene carbonate (VC), fluoroethylene carbonate (FEC), ethyl acetate (EA ), fluorobenzene (FB), etc., each solvent has advantages and disadvantages, unreasonable solvent formula and ratio will affect the use temperature of lithium-ion battery electrolyte

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