CN103427114A - Multifunctional lithium-ion battery electrolytic solution and preparing method thereof - Google Patents
Multifunctional lithium-ion battery electrolytic solution and preparing method thereof Download PDFInfo
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- CN103427114A CN103427114A CN2013103841273A CN201310384127A CN103427114A CN 103427114 A CN103427114 A CN 103427114A CN 2013103841273 A CN2013103841273 A CN 2013103841273A CN 201310384127 A CN201310384127 A CN 201310384127A CN 103427114 A CN103427114 A CN 103427114A
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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 relates to a multifunctional lithium-ion battery electrolytic solution and a preparing method of the multifunctional lithium-ion battery electrolytic solution. The multifunctional lithium-ion battery electrolytic solution is composed of 73%-86% of non-water organic solvent, 12%-22% of lithium salt and 2%-5% of additive, wherein the additive is a mixture of 30%-70% of 5-methyl-2-propiono furan and 30%-70% of vinylene carbonate. When the multifunctional lithium-ion battery electrolytic solution is prepared, dimethyl carbonate, ethylene carbonate and methyl ethyl carbonate are mixed in a glovebox with the water content smaller than or equal to 10ppm after the dimethyl carbonate, the ethylene carbonate and the methyl ethyl carbonate undergo rectification dehydration purification processing, and the non-water organic solvent is obtained; the non-water organic solvent is taken, contained in an airtight container for 4 hours under the temperature of 10 DEG C and then taken out; the lithium salt is added in the glovebox with the water content smaller than or equal to 10ppm, and the electrolytic solution is obtained; the additive is added into the electrolytic solution and evenly mixed, and the multifunctional lithium-ion battery electrolytic solution is obtained. By adding the 5-methyl-2-propiono furan, the electric conductivity and the flame retardation performance of the electrolytic solution are improved.
Description
Technical field
The present invention relates to a kind of multifunctional lithium ion battery electrolyte and preparation method thereof, belong to technical field of lithium ion.
Background technology
Lithium ion battery is after commercial applications, but it is high with voltage, specific energy is large, have extended cycle life, security performance is good, the advantage of the little fast charging and discharging of self discharge and developing rapidly, at present, lithium ion battery has been widely used in the electronic products such as mobile phone, notebook computer, digital camera, also as motive-power battery, be applied on electric tool, electric bicycle and electric automobile, for lithium ion battery better is applied in life production, people more and more pay close attention to basic research and the application study of lithium ion battery.Along with the development of technology, people are more and more stricter to the requirement of battery, just require battery to need better cycle performance, better security performance, better capacity performance.
Electrolyte, as " blood " of lithium ion battery, has a great impact lithium ion battery, and good electrolyte can effectively improve the chemical property of lithium ion battery, such as cycle performance, security performance, capacity performance, high rate performance etc.
The security performance of conventional lithium-ion battery electrolytes is not good at present, and capacity performance and cycle performance are general.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of multifunctional lithium ion battery electrolyte and preparation method thereof is provided, improve lithium ion battery safety performance, cycle performance and capacity performance.
Purpose of the present invention is achieved through the following technical solutions:
Multifunctional lithium ion battery electrolyte is characterized in that comprising following percentage by weight composition: non-aqueous organic solvent 73% ~ 86%, lithium salts 12% ~ 22%, additive 2% ~ 5%; The mixture that described additive is 5-methyl-2-propiono furans and vinylene carbonate, its percentage by weight is: 5-methyl-2-propiono furans 30% ~ 70%, ethylene carbonate 30% ~ 70%.
Further, above-mentioned multifunctional lithium ion battery electrolyte, the mixture that described non-aqueous organic solvent is dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate, its percentage by weight is: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%.
Further, above-mentioned multifunctional lithium ion battery electrolyte, described lithium salts is lithium hexafluoro phosphate, total concentration is 0.8M ~ 1.4 M.
The preparation method of multifunctional lithium ion battery electrolyte of the present invention comprises the following steps:
1) in the glove box of moisture≤10ppm, by dimethyl carbonate, ethylene carbonate, the methyl ethyl carbonate of process rectifying and dewatering purification process are mixed, control percentage by weight: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 73% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 22% lithium salts, obtain electrolyte;
3) 2% ~ 5% additive is added in above-mentioned electrolyte, mix, obtain multifunctional lithium ion battery electrolyte.
The substantive distinguishing features that technical solution of the present invention is outstanding and significant progressive being mainly reflected in:
The present invention, by adjusting multifunction additive 5-methyl-2-propiono furans, improves conductivity and the fire resistance of electrolyte, thereby improves security performance, cycle performance, the capacity performance of battery.
Embodiment
Multifunctional lithium ion battery electrolyte, composition is: non-aqueous organic solvent 73% ~ 86%, lithium salts 12% ~ 22%, additive 2% ~ 5%.Wherein, the mixture that non-aqueous organic solvent is dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate, its percentage by weight is: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%.The mixture that additive is 5-methyl-2-propiono furans and vinylene carbonate, its percentage by weight is: 5-methyl-2-propiono furans 30% ~ 70%, ethylene carbonate 30% ~ 70%.Described lithium salts is lithium hexafluoro phosphate, and total concentration is 0.8M ~ 1.4 M.
The preparation technology of multifunctional lithium ion battery electrolyte is:
1) in the glove box of moisture≤10ppm, by dimethyl carbonate, ethylene carbonate, the methyl ethyl carbonate of process rectifying and dewatering purification process are mixed, control percentage by weight: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 73% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 22% lithium salts, obtain electrolyte;
3) 2% ~ 5% additive is added in above-mentioned electrolyte, mix, obtain multifunctional lithium ion battery electrolyte.
Embodiment 1
In the glove box of moisture≤10ppm; 40g dimethyl carbonate, 30g ethylene carbonate, 30g methyl ethyl carbonate are made with extra care to the purification mixed solvent; get above-mentioned mixed solvent 77g; add 14g lithium hexafluoro phosphate (1M); stir; add 5-methyl-2-propiono furans 4 g to add again the 5g vinylene carbonate, stir and within 30 minutes, obtain multifunctional lithium ion battery electrolyte.
Embodiment 2
In the glove box of moisture≤10ppm; 40g dimethyl carbonate, 30g ethylene carbonate, 30g methyl ethyl carbonate are made with extra care to the purification mixed solvent; get above-mentioned mixed solvent 75g; add 13.8g lithium hexafluoro phosphate (1M); stir; add 5-methyl-2-propiono furans 6.4 g to add again the 5g vinylene carbonate, stir and within 30 minutes, obtain multifunctional lithium ion battery electrolyte.
Embodiment 3
In the glove box of moisture≤10ppm; 40g dimethyl carbonate, 20g ethylene carbonate, 40g methyl ethyl carbonate are made with extra care to the purification mixed solvent; get above-mentioned mixed solvent 74g; add 17g lithium hexafluoro phosphate (1.2M); stir; add 5-methyl-2-propiono furans 4 g to add again the 5g vinylene carbonate, stir and within 30 minutes, obtain multifunctional lithium ion battery electrolyte.
Embodiment 4
In the glove box of moisture≤10ppm; 35g dimethyl carbonate, 25g ethylene carbonate, 40g methyl ethyl carbonate are made with extra care to the purification mixed solvent; get above-mentioned mixed solvent 74g; add 17g lithium hexafluoro phosphate (1.2M); stir; add 5-methyl-2-propiono furans 3.4 g to add again the 5.6g vinylene carbonate, stir and within 30 minutes, obtain multifunctional lithium ion battery electrolyte.
Comparative example
In the glove box of moisture≤10ppm, 33g dimethyl carbonate, 33g ethylene carbonate, 34g methyl ethyl carbonate are made with extra care to the purification mixed solvent, get above-mentioned mixed solvent 76g, add 12g lithium hexafluoro phosphate (1M), stir, add the 2g vinylene carbonate, stir and within 30 minutes, obtain high-temperature lithium-ion battery electrolyte.
Above-described embodiment and comparative example are tested, and Data Comparison is as table 1, and test battery is that ternary system is positive electrode, 18650 cylindrical batteries that Delanium is negative pole.
Table 1
| ? | Circulation in 500 weeks | 3C10V overcharges |
| Comparative example | 80.04% | CID disconnects and is on fire |
| Embodiment 1 | 86.56% | CID disconnects not on fire |
| Embodiment 2 | 85.02% | CID disconnects not on fire |
| Embodiment 3 | 85.31% | CID disconnects not on fire |
| Embodiment 4 | 87.08% | CID disconnects not on fire |
In sum, the present invention, by adjusting multifunction additive 5-methyl-2-propiono furans, improves conductivity and the fire resistance of electrolyte, thereby improves security performance, cycle performance, the capacity performance of battery.
Need to understand: the above is only the preferred embodiment of the present invention; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. multifunctional lithium ion battery electrolyte, is characterized in that comprising following percentage by weight composition: non-aqueous organic solvent 73% ~ 86%, lithium salts 12% ~ 22%, additive 2% ~ 5%; The mixture that described additive is 5-methyl-2-propiono furans and vinylene carbonate, its percentage by weight is: 5-methyl-2-propiono furans 30% ~ 70%, ethylene carbonate 30% ~ 70%.
2. multifunctional lithium ion battery electrolyte according to claim 1, it is characterized in that: the mixture that described non-aqueous organic solvent is dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate, its percentage by weight is: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%.
3. multifunctional lithium ion battery electrolyte according to claim 1, it is characterized in that: described lithium salts is lithium hexafluoro phosphate, total concentration is 0.8M ~ 1.4 M.
4. the preparation method of multifunctional lithium ion battery electrolyte claimed in claim 1 is characterized in that comprising the following steps:
1) in the glove box of moisture≤10ppm, by dimethyl carbonate, ethylene carbonate, the methyl ethyl carbonate of process rectifying and dewatering purification process are mixed, control percentage by weight: dimethyl carbonate 30% ~ 40%, methyl ethyl carbonate 30% ~ 40%, ethylene carbonate 20% ~ 40%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 73% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 22% lithium salts, obtain electrolyte;
3) 2% ~ 5% additive is added in above-mentioned electrolyte, mix, obtain multifunctional lithium ion battery electrolyte.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108539266A (en) * | 2018-05-03 | 2018-09-14 | 大同新成新材料股份有限公司 | A kind of preparation method of lithium battery electrolytes |
| CN108680701A (en) * | 2018-04-04 | 2018-10-19 | 珠海市赛纬电子材料股份有限公司 | The detection method of the inorganic salt compound of class containing oxalic acid in a kind of lithium hexafluorophosphate electrolyte solution |
| CN114566707A (en) * | 2022-01-20 | 2022-05-31 | 上海兰钧新能源科技有限公司 | Lithium ion battery electrolyte, preparation method thereof and lithium ion battery |
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| JP2008147014A (en) * | 2006-12-11 | 2008-06-26 | Sony Corp | Nonaqueous electrolyte composition and nonaqueous electrolyte secondary battery |
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| CN108680701A (en) * | 2018-04-04 | 2018-10-19 | 珠海市赛纬电子材料股份有限公司 | The detection method of the inorganic salt compound of class containing oxalic acid in a kind of lithium hexafluorophosphate electrolyte solution |
| CN108539266A (en) * | 2018-05-03 | 2018-09-14 | 大同新成新材料股份有限公司 | A kind of preparation method of lithium battery electrolytes |
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Application publication date: 20131204 |