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Non-aqueous electrolyte solution and application thereof

A non-aqueous electrolyte and electrolyte solution technology, which is applied in the field of chemical materials, can solve problems such as film composition and property changes, affect battery performance, surface film deterioration, etc., to inhibit decomposition, increase cycle life and service life, and inhibit resistance increase Effect

Inactive Publication Date: 2011-05-25
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned technologies, it is impossible to obtain a sufficient film effect relative to the increase in battery characteristics. First, the surface film deteriorates and the function decreases when it is used repeatedly; Different degrees of decomposition occur, leading to irreversible changes in the composition and properties of the coating, which seriously affects battery performance

Method used

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  • Non-aqueous electrolyte solution and application thereof
  • Non-aqueous electrolyte solution and application thereof
  • Non-aqueous electrolyte solution and application thereof

Examples

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Embodiment Construction

[0025] The present invention lists the composition of 1 to 74 kinds of non-aqueous electrolyte solutions and the test data of the capacity retention rate of the battery using each electrolyte solution in the form of a table, see Table 1 below for details.

[0026] Components and battery capacity percentage of non-aqueous electrolyte solution of table 1

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033] It can be seen from the above examples that by using the non-aqueous electrolyte solution added with functional additives, the capacity retention rate of the battery can be effectively improved, and the cycle life and service life of the battery are increased. At the same time, it can also improve the capacity retention rate and cycle life of the battery in a high temperature environment.

[0034] The present invention still has many specific implementation modes, and all technical solutions formed by adopting equivalent replacement or equivalent tran...

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Abstract

The invention provides a non-aqueous electrolyte solution and application thereof. The electrolyte solution comprises the following four components: lithium salt, a carbonic ester and / or ether organic solvent, a function additive and other additives, wherein the molar concentration range of lithium salt in the electrolyte is 0.001-2 mol / L; the mass proportion range of the function additive in the electrolyte is 0.01-20 percent; and the molar concentration range of the other additives in the electrolyte is 0-0.5 mol / L. The non-aqueous electrolyte solution provided by the invention can inhibit the decomposition of the solvent, prolong the cycle life and service life of a lithium battery, inhibit the resistance increase of the battery, improve the volume maintenance rate of the battery and prolong the volume maintenance rate and cycle life of the battery in a high-temperature environment and can be applied to the manufacture of a primary lithium battery, a secondary lithium battery or a lithium ion battery.

Description

technical field [0001] The invention relates to a nonaqueous electrolyte solution and its application, belonging to the technical field of chemical materials. Background technique [0002] At present, commercial lithium battery electrolytes are mainly composed of organic carbonates such as dimethyl carbonate (DMC for short), diethyl carbonate (DEC for short), ethylene carbonate (EC for short), etc., and conductive salts (mainly LiPF 6 )composition. The optimization and selection of organic carbonate non-aqueous electrolyte solutions is one of the important research directions to improve the comprehensive performance of lithium-ion batteries. Non-aqueous electrolyte solutions used in lithium-ion batteries should generally meet the following requirements: (1) high ion conductivity, generally should reach 10 -3 S / cm; (2) high lithium ion migration number to obtain high lithium ion conductivity; (3) wide electrochemical window, that is, to meet the reversible intercalation and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M6/14H01M10/0525
CPCY02E60/12Y02E60/122Y02E60/10Y02P70/50
Inventor 李立飞徐丽娜袁杰陈世彬陈晓荣袁翔云赵世勇郭军
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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