CN112803074A - Lithium battery electrolyte - Google Patents
Lithium battery electrolyte Download PDFInfo
- Publication number
- CN112803074A CN112803074A CN201911113261.3A CN201911113261A CN112803074A CN 112803074 A CN112803074 A CN 112803074A CN 201911113261 A CN201911113261 A CN 201911113261A CN 112803074 A CN112803074 A CN 112803074A
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- China
- Prior art keywords
- parts
- lithium
- ethylene
- lithium battery
- electrolyte
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Classifications
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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
- H01M10/0568—Liquid materials characterised by the solutes
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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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- 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
- H01M10/0569—Liquid materials characterised by the solvents
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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
Abstract
The invention provides a lithium battery electrolyte which comprises the following components in parts by weight: 48-60 parts of lithium hexafluorophosphate, 30-40 parts of lithium dioxalate borate, 20-30 parts of dimethylfuran, 0.1-1.2 parts of carbodiimide, 1-3 parts of ethylene glycol dimethyl ether, 0.1-1 part of p-phenylenediamine oxalate, 3-5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5-0.7 part of acrylamide, 2-8 parts of propylene carbonate, 3-10 parts of ethylene carbonate and 5-8 parts of borosilicate glass powder. Compared with the prior art, the lithium battery electrolyte provided by the invention has the advantages that the cycle service life of the electrolyte is prolonged, and the stability is good.
Description
Technical Field
The invention relates to the field of lithium batteries, in particular to a lithium battery electrolyte.
Background
Lithium batteries generally consist of a positive electrode, a negative electrode and an electrolyte. Wherein, the positive electrode comprises lithium cobaltate and a plurality of additive components, and the additive components are coated on the aluminum foil to generate charge-discharge chemical reaction; the negative electrode is a nano-scale carbon powder such as graphite, and these materials are used by being coated on a copper foil. The electrolyte in the electrolyte generally comprises lithium perchlorate, lithium hexafluorophosphate and the like, but the battery prepared by taking the lithium perchlorate as the raw material has poor low-temperature effect and explosion risk, and is forbidden to be used in Japan and America at present; the battery made of the lithium salt containing fluorine has good performance, no explosion danger and strong applicability, and particularly the battery made of the lithium hexafluorophosphate has the advantages that the treatment work of the discarded battery in the future is relatively simple and is eco-friendly, so the electrolyte has very wide market prospect.
Although lithium hexafluorophosphate has the advantages of good comprehensive performance at low temperature and high temperature and safety without explosion, the lithium hexafluorophosphate also has the characteristic of being easy to absorb water and hydrolyze to generate hydrofluoric acid with high corrosivity, so that how to prevent the hydrofluoric acid from corroding aluminum foils and copper foils in the positive and negative electrodes too fast improves the service life of the lithium battery.
Therefore, there is a need to provide a novel electrolyte for lithium batteries to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a novel lithium battery electrolyte which prolongs the cycle service life of the electrolyte and has good stability.
In order to achieve the purpose, the invention provides a lithium battery electrolyte which comprises the following components in parts by weight: 48-60 parts of lithium hexafluorophosphate, 30-40 parts of lithium dioxalate borate, 20-30 parts of dimethylfuran, 0.1-1.2 parts of carbodiimide, 1-3 parts of ethylene glycol dimethyl ether, 0.1-1 part of p-phenylenediamine oxalate, 3-5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5-0.7 part of acrylamide, 2-8 parts of propylene carbonate, 3-10 parts of ethylene carbonate and 5-8 parts of borosilicate glass powder.
Further, the paint comprises the following components in parts by weight: 48 parts of lithium hexafluorophosphate, 30 parts of lithium dioxalate borate, 20 parts of dimethylfuran, 0.1 part of carbodiimide, 1 part of ethylene glycol dimethyl ether, 0.1 part of p-phenylenediamine oxalate, 3 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5 part of acrylamide, 2 parts of propylene carbonate, 3 parts of ethylene carbonate and 5 parts of borosilicate glass powder.
Further, the paint comprises the following components in parts by weight: 60 parts of lithium hexafluorophosphate, 40 parts of lithium dioxalate borate, 30 parts of dimethylfuran, 1.2 parts of carbodiimide, 3 parts of ethylene glycol dimethyl ether, 1 part of p-phenylenediamine oxalate, 5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.7 part of acrylamide, 8 parts of propylene carbonate, 10 parts of ethylene carbonate and 8 parts of borosilicate glass powder.
Further, the paint comprises the following components in parts by weight: 55 parts of lithium hexafluorophosphate, 35 parts of lithium dioxalate borate, 25 parts of dimethylfuran, 0.8 part of carbodiimide, 2 parts of ethylene glycol dimethyl ether, 0.5 part of p-phenylenediamine oxalate, 4 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.6 part of acrylamide, 6 parts of propylene carbonate, 8 parts of ethylene carbonate and 7 parts of borosilicate glass powder.
Compared with the prior art, the electrolyte for the lithium battery can effectively absorb hydrofluoric acid through borosilicate glass powder, weaken the corrosion effect of the hydrofluoric acid on the positive electrode and the negative electrode, prolong the service life of the product, has stable electrochemical property and low production cost, and can prolong the service life of the lithium battery product.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
The invention provides a lithium battery electrolyte which comprises the following components in parts by weight: 48-60 parts of lithium hexafluorophosphate, 30-40 parts of lithium dioxalate borate, 20-30 parts of dimethylfuran, 0.1-1.2 parts of carbodiimide, 1-3 parts of ethylene glycol dimethyl ether, 0.1-1 part of p-phenylenediamine oxalate, 3-5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5-0.7 part of acrylamide, 2-8 parts of propylene carbonate, 3-10 parts of ethylene carbonate and 5-8 parts of borosilicate glass powder.
In the first embodiment, the lithium battery electrolyte comprises the following components in parts by weight: 48 parts of lithium hexafluorophosphate, 30 parts of lithium dioxalate borate, 20 parts of dimethylfuran, 0.1 part of carbodiimide, 1 part of ethylene glycol dimethyl ether, 0.1 part of p-phenylenediamine oxalate, 3 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5 part of acrylamide, 2 parts of propylene carbonate, 3 parts of ethylene carbonate and 5 parts of borosilicate glass powder.
In the second embodiment, the lithium battery electrolyte comprises the following components in parts by weight: 60 parts of lithium hexafluorophosphate, 40 parts of lithium dioxalate borate, 30 parts of dimethylfuran, 1.2 parts of carbodiimide, 3 parts of ethylene glycol dimethyl ether, 1 part of p-phenylenediamine oxalate, 5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.7 part of acrylamide, 8 parts of propylene carbonate, 10 parts of ethylene carbonate and 8 parts of borosilicate glass powder.
In the third embodiment, the lithium battery electrolyte comprises the following components in parts by weight: 55 parts of lithium hexafluorophosphate, 35 parts of lithium dioxalate borate, 25 parts of dimethylfuran, 0.8 part of carbodiimide, 2 parts of ethylene glycol dimethyl ether, 0.5 part of p-phenylenediamine oxalate, 4 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.6 part of acrylamide, 6 parts of propylene carbonate, 8 parts of ethylene carbonate and 7 parts of borosilicate glass powder.
The binary mixed solvent composed of the propylene phosphate and the ethylene carbonate has a high flash point, can prolong the cycle service life of the electrolyte, and has the advantages of safety, flame resistance and strong functionality when being applied to the electrolyte.
The lithium hexafluorophosphate is used as the electrolyte of the lithium ion battery, is mainly used for lithium ion power batteries, lithium ion energy storage batteries and other daily batteries, and is the electrolyte of the lithium ion battery which can not be replaced in the near middle period.
Lithium bis (oxalato) borate is a new and proprietary conductive salt used in high performance batteries like lithium batteries, lithium ion battery polymers to improve their conductivity.
Dimethylfuran is used to make organic solvents or intermediates for organic solvents.
Carbodiimides are used to promote lipid production. Ethylene glycol dimethyl ether was used as a stabilizer.
The 1, 2-bis (trimethylsilyl) ethylene is used for improving the solubility and preventing solute from crystallizing and separating out under the low-temperature condition to influence the low-temperature performance of the electrolyte. The borosilicate glass powder can effectively absorb hydrofluoric acid. Due to the special self-structure, the inorganic glass particles can attach free fluoride ions on the surfaces of the inorganic glass particles, so that the inorganic glass particles can play a permanent passivation role, prevent the inorganic glass particles from reacting with water molecules to generate excessive hydrofluoric acid, further weaken the corrosion effect of the hydrofluoric acid on the positive electrode and the negative electrode, and prolong the service life of products.
Compared with the prior art, the electrolyte for the lithium battery can effectively absorb hydrofluoric acid through borosilicate glass powder, weaken the corrosion effect of the hydrofluoric acid on the positive electrode and the negative electrode, prolong the service life of the product, has stable electrochemical property and low production cost, and can prolong the service life of the lithium battery product.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The lithium battery electrolyte is characterized by comprising the following components in parts by weight: 48-60 parts of lithium hexafluorophosphate, 30-40 parts of lithium dioxalate borate, 20-30 parts of dimethylfuran, 0.1-1.2 parts of carbodiimide, 1-3 parts of ethylene glycol dimethyl ether, 0.1-1 part of p-phenylenediamine oxalate, 3-5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5-0.7 part of acrylamide, 2-8 parts of propylene carbonate, 3-10 parts of ethylene carbonate and 5-8 parts of borosilicate glass powder.
2. The lithium battery electrolyte as claimed in claim 1, comprising the following components in parts by weight: 48 parts of lithium hexafluorophosphate, 30 parts of lithium dioxalate borate, 20 parts of dimethylfuran, 0.1 part of carbodiimide, 1 part of ethylene glycol dimethyl ether, 0.1 part of p-phenylenediamine oxalate, 3 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.5 part of acrylamide, 2 parts of propylene carbonate, 3 parts of ethylene carbonate and 5 parts of borosilicate glass powder.
3. The lithium battery electrolyte as claimed in claim 1, comprising the following components in parts by weight: 60 parts of lithium hexafluorophosphate, 40 parts of lithium dioxalate borate, 30 parts of dimethylfuran, 1.2 parts of carbodiimide, 3 parts of ethylene glycol dimethyl ether, 1 part of p-phenylenediamine oxalate, 5 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.7 part of acrylamide, 8 parts of propylene carbonate, 10 parts of ethylene carbonate and 8 parts of borosilicate glass powder.
4. The lithium battery electrolyte as claimed in claim 1, comprising the following components in parts by weight: 55 parts of lithium hexafluorophosphate, 35 parts of lithium dioxalate borate, 25 parts of dimethylfuran, 0.8 part of carbodiimide, 2 parts of ethylene glycol dimethyl ether, 0.5 part of p-phenylenediamine oxalate, 4 parts of 1, 2-bis (trimethylsilyl) ethylene, 0.6 part of acrylamide, 6 parts of propylene carbonate, 8 parts of ethylene carbonate and 7 parts of borosilicate glass powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113261.3A CN112803074A (en) | 2019-11-14 | 2019-11-14 | Lithium battery electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113261.3A CN112803074A (en) | 2019-11-14 | 2019-11-14 | Lithium battery electrolyte |
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| Publication Number | Publication Date |
|---|---|
| CN112803074A true CN112803074A (en) | 2021-05-14 |
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| CN201911113261.3A Pending CN112803074A (en) | 2019-11-14 | 2019-11-14 | Lithium battery electrolyte |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464953A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery electrolytes and lithium battery |
| US20180048025A1 (en) * | 2016-08-12 | 2018-02-15 | Pellion Technologies, Inc. | Additive containing electrolytes for high energy rechargeable metal anode batteries |
| CN107910591A (en) * | 2017-11-14 | 2018-04-13 | 石家庄圣泰化工有限公司 | A kind of high-temperature-reslithium lithium battery electrolyte |
| CN108258318A (en) * | 2018-01-22 | 2018-07-06 | 梁成光 | A kind of lithium battery electrolytes and lithium battery |
| CN108400384A (en) * | 2018-04-27 | 2018-08-14 | 大同新成新材料股份有限公司 | A kind of Li-C battery electrolytes and preparation method thereof and device |
-
2019
- 2019-11-14 CN CN201911113261.3A patent/CN112803074A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180048025A1 (en) * | 2016-08-12 | 2018-02-15 | Pellion Technologies, Inc. | Additive containing electrolytes for high energy rechargeable metal anode batteries |
| CN107464953A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery electrolytes and lithium battery |
| CN107910591A (en) * | 2017-11-14 | 2018-04-13 | 石家庄圣泰化工有限公司 | A kind of high-temperature-reslithium lithium battery electrolyte |
| CN108258318A (en) * | 2018-01-22 | 2018-07-06 | 梁成光 | A kind of lithium battery electrolytes and lithium battery |
| CN108400384A (en) * | 2018-04-27 | 2018-08-14 | 大同新成新材料股份有限公司 | A kind of Li-C battery electrolytes and preparation method thereof and device |
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Application publication date: 20210514 |