Lithium ion power battery non-water electrolyte

A non-aqueous electrolyte, power battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low high temperature cycle life and other problems, and achieve the effect of improving stability and improving normal temperature cycle performance

Inactive Publication Date: 2016-10-12
ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] With the continuous improvement of the actual working environment requirements of power batteries in lithium-ion vehicles, working at room temperature at 25° can no longer meet the actual needs, and the working temperature of most power batteries exceeds 25°, between 45° and 60° Therefore, low cycle life at high temperature is gradually becoming one of the biggest bottlenecks in power battery applications, such as lithium-ion power batteries used in electric vehicles

Method used

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Examples

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Embodiment 1

[0026] The electrolyte was prepared in a BRAUN glove box filled with nitrogen with a purity of 99.999%, the moisture in the glove box was controlled at ≤5ppm, and the temperature was at room temperature. Mix 30 grams of EC and 70 grams of EMC evenly, seal it, put it in the refrigerator until it cools to 8°C, transfer it to the glove box, and then add LiPF in two batches 6 Mix well to form a non-aqueous electrolyte solution for lithium-ion batteries with a molar concentration of 1 mol / L commonly used lithium salt. Add 10 grams of LIFSI, 2 grams of VC, and 0.1 grams of TMSB to the above electrolyte solution and mix evenly to obtain the present embodiment. Example lithium-ion power battery non-aqueous electrolyte.

[0027] The preparation methods of the following other examples and comparative examples are carried out with reference to the preparation method of Example 1.

[0028] Among them, FEC (CAS: 114435-02-8), 1,3,5 pentanetricarbonitrile (4379-04-8), 1,2,3 propanetricarbo...

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Abstract

The invention discloses a lithium ion power battery non-water electrolyte. The lithium ion power battery non-water electrolyte is prepared from, by weight, 100 parts of solvents, common lithium salts, 0.2-10 parts of anode film formation additives, 0.2-10 parts of circulation improvement additives and 0.01-0.5 part of acid and water removal additives. The solvents are cyclic carbonic ester and/or chain carbonic ester, and the molar concentration of the common salts in the solvents is 0.8-1.5 mol/L. Due to the combination use of the anode film formation additives, the circulation improvement additives and the acid and water removal additives, during first formation, a CEI film can be formed on the surface of an anode, the stability of a cathode SEI film can be improved, and the normal temperature circulation performance, the high-temperature 45 DEG C circulation performance and the high-temperature storage performance of a power battery can be remarkably improved.

Description

[technical field] [0001] The invention relates to an electrolyte solution for a lithium ion battery, in particular to a nonaqueous electrolyte solution for a lithium ion power battery. [Background technique] [0002] Due to environmental pollution and energy scarcity, petroleum is no longer a single source of energy, and new green, environmentally friendly, and sustainable energy technologies are constantly developing, such as water energy, wind energy, biomass energy, solar energy, and so on. The green, high-energy and environmentally friendly lithium-ion power battery that appeared in 1995 has become one of the most important power sources due to its high energy density, long cycle life, and high operating voltage. During the "Twelfth Five-Year Plan" period, the state intensively introduced a number of policies and measures, including consumption subsidies, tax incentives, government procurement, technology research and development, charging facility incentives, etc., cove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0569
CPCH01M10/0567H01M10/0569Y02E60/10
Inventor 王霹霹戴晓兵
Owner ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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