CN108155417B - Multifunctional additive for electrolyte of lithium ion battery electrode material and preparation method thereof - Google Patents
Multifunctional additive for electrolyte of lithium ion battery electrode material and preparation method thereof Download PDFInfo
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- CN108155417B CN108155417B CN201711445063.8A CN201711445063A CN108155417B CN 108155417 B CN108155417 B CN 108155417B CN 201711445063 A CN201711445063 A CN 201711445063A CN 108155417 B CN108155417 B CN 108155417B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a multifunctional additive for an electrolyte of a lithium ion battery electrode material and a preparation method thereof, and relates to the technical field of multifunctional additives for lithium ion batteries. The multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises 1-butynyl diethyl phosphonate, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone. The multifunctional additive for the electrolyte of the lithium ion battery electrode material can improve the performance of the lithium ion battery, and the lithium ion battery manufactured by the multifunctional additive for the electrolyte of the lithium ion battery electrode material has remarkable application value and prospect for developing long-life energy storage and power lithium ion batteries.
Description
Technical Field
The invention relates to the technical field of lithium ion battery additives, in particular to a multifunctional additive for an electrolyte of a lithium ion battery electrode material and a preparation method thereof.
Background
The lithium ion battery has the characteristics of high energy density, high voltage, long service life and the like, so that the lithium ion battery is widely applied to the markets of portable electronic products such as mobile phones, digital cameras, personal computers and the like, becomes an important choice in the current fields of power and energy storage, and has important significance for developing low-carbon economy.
The multifunctional additive for the electrolyte of the electrode material of the lithium ion battery mainly comprises lithium salt and organic carbonate, and is called as the blood of the battery. The electrolyte is a bridge connecting the positive electrode and the negative electrode, and plays a role in transmitting ions and conducting current in the battery. Therefore, the electrolyte has a very obvious influence on the battery performance, and the optimization of the electrolyte composition and the performance has very important significance for improving the performance of the lithium ion battery. During the first charge and discharge process of the lithium ion battery, the lithium salt and the solvent can perform an irreversible reduction reaction on the surface of the carbon cathode to form a layer of solid electrolyte interface film (SEI film) with conductivity of electron insulating ions. The formation of SEI is an irreversible reaction, and consumes a part of lithium ions capable of being recycled in the battery, resulting in a decrease in reversible capacity of the battery, resulting in rapid deterioration of cycle performance of the battery, and severe swelling of the battery, resulting in a decrease in the performance of the entire battery.
Therefore, the development of the multifunctional additive for the electrolyte of the lithium ion battery electrode material has very important significance for improving the performance of the lithium ion battery.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multifunctional additive for an electrolyte of a lithium ion battery electrode material and a preparation method thereof.
In order to achieve the above purpose, the technical scheme of the invention is realized by the following technical scheme:
the multifunctional additive for the electrolyte of the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 3-10 parts of diethyl 1-butynylphosphonate, 1-7 parts of ethoxy pentafluorocyclotriphosphazene, 1-5 parts of ethylene vinylene carbonate, 3-10 parts of hexamethyldisilazane and 3-10 parts of 1, 3-propylene sultone.
Preferably, the multifunctional additive is prepared from the following raw materials in parts by weight: 5-8 parts of diethyl 1-butynylphosphonate, 3-6 parts of ethoxy pentafluorocyclotriphosphazene, 2-4 parts of ethylene vinylene carbonate, 5-8 parts of hexamethyldisilazane and 5-9 parts of 1, 3-propylene sultone.
Preferably, the multifunctional additive is prepared from the following raw materials in parts by weight: 6.5 parts of diethyl 1-butynylphosphonate, 4 parts of ethoxy pentafluorocyclotriphosphazene, 3 parts of ethylene vinylene carbonate, 6.5 parts of hexamethyldisilazane and 7 parts of 1, 3-propylene sultone.
Preferably, the multifunctional additive is contained in an amount of 0.2 to 12% based on the total weight of the electrolyte.
Preferably, the multifunctional additive is present in an amount of 2 to 8% based on the total weight of the electrolyte.
A preparation method of a multifunctional additive for electrolyte of lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
The invention provides a multifunctional additive for electrolyte of lithium ion battery electrode material, which has the following advantages compared with the prior art:
the lithium ion battery manufactured by the multifunctional additive for the electrolyte for the lithium ion battery electrode material has remarkable application value and prospect for developing long-life energy storage and power lithium ion batteries, and during the first charging and discharging process of the lithium ion battery, lithium salt, organic solvent and the multifunctional additive do not generate irreversible reduction reaction on the surface of a carbon cathode, so that a solid electrolyte interface film is prevented from being generated, the electrical property of the battery can be maintained for a long time, and the service life of the battery is prolonged;
the multifunctional additive for the electrolyte of the lithium ion battery electrode material is prepared by adding the multifunctional additive with special functions into the multifunctional additive for the electrolyte of the lithium ion battery electrode material.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the electrolyte multifunctional additive for the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 3 parts of diethyl 1-butynylphosphonate, 1 part of ethoxy pentafluorocyclotriphosphazene, 1 part of ethylene vinylene carbonate, 3 parts of hexamethyldisilazane and 3 parts of 1, 3-propylene sultone;
wherein, the content of the multifunctional additive is 0.2 percent by taking the total weight of the electrolyte as a reference.
The preparation method of the multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
Example 2:
the electrolyte multifunctional additive for the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 10 parts of diethyl 1-butynylphosphonate, 7 parts of ethoxy pentafluorocyclotriphosphazene, 5 parts of ethylene vinylene carbonate, 10 parts of hexamethyldisilazane and 10 parts of 1, 3-propylene sultone;
wherein, the content of the multifunctional additive is 12 percent by taking the total weight of the electrolyte as a reference;
the preparation method of the multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
Example 3:
the electrolyte multifunctional additive for the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 6.5 parts of diethyl 1-butynylphosphonate, 4 parts of ethoxy pentafluorocyclotriphosphazene, 3 parts of ethylene vinylene carbonate, 6.5 parts of hexamethyldisilazane and 7 parts of 1, 3-propylene sultone;
wherein, the content of the multifunctional additive is 2 percent by taking the total weight of the electrolyte as a reference;
the preparation method of the multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
Example 4:
the electrolyte multifunctional additive for the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 5 parts of diethyl 1-butynylphosphonate, 3 parts of ethoxy pentafluorocyclotriphosphazene, 2 parts of ethylene vinylene carbonate, 5 parts of hexamethyldisilazane and 5 parts of 1, 3-propylene sultone;
wherein, the content of the multifunctional additive is 8 percent by taking the total weight of the electrolyte as a reference;
the preparation method of the multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
Example 5:
the electrolyte multifunctional additive for the lithium ion battery electrode material is prepared from the following raw materials in parts by weight: 8 parts of diethyl 1-butynylphosphonate, 6 parts of ethoxy pentafluorocyclotriphosphazene, 4 parts of ethylene vinylene carbonate, 8 parts of hexamethyldisilazane and 9 parts of 1, 3-propylene sultone;
wherein, the content of the multifunctional additive is 6 percent by taking the total weight of the electrolyte as a reference;
the preparation method of the multifunctional additive for the electrolyte of the lithium ion battery electrode material comprises the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The multifunctional additive for the electrolyte of the lithium ion battery electrode material is characterized by being prepared from the following raw materials in parts by weight: 3-10 parts of diethyl 1-butynylphosphonate, 1-7 parts of ethoxy pentafluorocyclotriphosphazene, 1-5 parts of ethylene vinylene carbonate, 3-10 parts of hexamethyldisilazane and 3-10 parts of 1, 3-propylene sultone; the content of the multifunctional additive is 0.2-12% by taking the total weight of the electrolyte as a reference.
2. The multifunctional additive for the electrolyte of the electrode material of the lithium ion battery as claimed in claim 1, wherein the multifunctional additive is prepared from the following raw materials in parts by weight: 5-8 parts of diethyl 1-butynylphosphonate, 3-6 parts of ethoxy pentafluorocyclotriphosphazene, 2-4 parts of ethylene vinylene carbonate, 5-8 parts of hexamethyldisilazane and 5-9 parts of 1, 3-propylene sultone.
3. The multifunctional additive for the electrolyte of the electrode material of the lithium ion battery as claimed in claim 1, wherein the multifunctional additive is prepared from the following raw materials in parts by weight: 6.5 parts of diethyl 1-butynylphosphonate, 4 parts of ethoxy pentafluorocyclotriphosphazene, 3 parts of ethylene vinylene carbonate, 6.5 parts of hexamethyldisilazane and 7 parts of 1, 3-propylene sultone.
4. The multifunctional additive for electrolyte of electrode material of lithium ion battery as claimed in claim 1, wherein: the content of the multifunctional additive is 2-8% by taking the total weight of the electrolyte as a reference.
5. A method for preparing the multifunctional additive for the electrolyte of the electrode material of the lithium ion battery as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
s1, weighing the raw materials for later use;
and S2, adding 1-butynylphosphonic acid diethyl ester, ethoxy pentafluorocyclotriphosphazene, ethylene vinylene carbonate, hexamethyldisilazane and 1, 3-propylene sultone into the reaction tank while stirring in an inert atmosphere, and uniformly stirring to obtain the catalyst.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938008A (en) * | 2010-09-21 | 2011-01-05 | 厦门大学 | Lithium ion battery electrolyte fire retardant and preparation method thereof |
| CN103456993A (en) * | 2013-09-30 | 2013-12-18 | 东莞市杉杉电池材料有限公司 | High-voltage lithium-ion battery electrolyte |
| CN106602142A (en) * | 2017-02-16 | 2017-04-26 | 湖南锂顺能源科技有限公司 | Electrolyte used for lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938008A (en) * | 2010-09-21 | 2011-01-05 | 厦门大学 | Lithium ion battery electrolyte fire retardant and preparation method thereof |
| CN103456993A (en) * | 2013-09-30 | 2013-12-18 | 东莞市杉杉电池材料有限公司 | High-voltage lithium-ion battery electrolyte |
| CN106602142A (en) * | 2017-02-16 | 2017-04-26 | 湖南锂顺能源科技有限公司 | Electrolyte used for lithium ion battery |
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