CN103427116A - Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof - Google Patents
Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof Download PDFInfo
- Publication number
- CN103427116A CN103427116A CN2013103850836A CN201310385083A CN103427116A CN 103427116 A CN103427116 A CN 103427116A CN 2013103850836 A CN2013103850836 A CN 2013103850836A CN 201310385083 A CN201310385083 A CN 201310385083A CN 103427116 A CN103427116 A CN 103427116A
- Authority
- CN
- China
- Prior art keywords
- lithium
- carbonate
- ion battery
- electrolyte
- organic solvent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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 lithium-ion electrolyte capable of forming a film at a positive pole and a preparation method of the lithium-ion electrolyte. The lithium-ion electrolyte comprises, by weight, 77-86% of non-aqueous organic solvent, 12-18 % of lithium salt and 2-5% of an annexing agent, and the annexing agent is a mixture of tetra-oxethyl silicane and vinylene carbonate. The preparation method includes the steps that in a glove box where water content is smaller than or equal to 10ppm, dimethyl carbonate, ethylene carbonate and ethyl methyl carbonate after rectification dehydration and purification treatment are mixed to obtain the non-aqueous organic solvent; the non-aqueous organic solvent is contained in a sealed container at minus 10 DEG C, stands for 4h and then is taken out; in the glove box where the water content is smaller than or equal to 10ppm, the lithium salt is added to obtain an electrolyte; the annexing agent is added to the electrolyte, and the annexing agent and the electrolyte are evenly mixed to obtain the lithium-ion electrolyte capable of forming the film at the positive pole. The tetra-oxethyl silicane can form a layer of SEI protective film on the surface of lithium manganate to effectively prevent manganese ions from being separated out, so that cycle performance of a lithium-ion battery with the lithium manganate as the positive pole is improved.
Description
Technical field
The present invention relates to a kind ofly can, at lithium-ion battery electrolytes of anodal film forming 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.
The advantages such as LiMn2O4 has aboundresources, cost is low, pollution-free, fail safe is good, good rate capability, it is a kind of good anode material for lithium-ion batteries, but its active ion manganese ion in the cyclic process LiMn2O4 is easily separated out the avalanche that causes the LiMn2O4 structure, and then cause the cycle performance of battery to descend.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists; provide a kind of can be at lithium-ion battery electrolytes of anodal film forming and preparation method thereof; can form on the surface of LiMn2O4 one deck SEI diaphragm; effectively stop the additive of separating out of manganese ion, thereby improve the cycle performance that LiMn2O4 is the positive electrode lithium ion battery.
Purpose of the present invention is achieved through the following technical solutions:
Can, at the lithium-ion battery electrolytes of anodal film forming, it is characterized in that comprising following percentage by weight composition: non-aqueous organic solvent 77% ~ 86%, lithium salts 12% ~ 18% and additive 2% ~ 5%; The mixture that described additive is tetraethoxysilane and vinylene carbonate, its percentage by weight is: tetraethoxysilane 40% ~ 60%, ethylene carbonate 40% ~ 60%.
Further, above-mentioned can be at the lithium-ion battery electrolytes of anodal film forming, the mixture that described non-aqueous organic solvent is dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate, and its percentage by weight is: dimethyl carbonate 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%.
Further, above-mentioned can be at the lithium-ion battery electrolytes of anodal film forming, and described lithium salts is lithium hexafluoro phosphate.
The present invention can, in the preparation method of the lithium-ion battery electrolytes of anodal film forming, comprise 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 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 77% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 18% 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:
Additive tetraethoxysilane of the present invention can form on the surface of LiMn2O4 one deck SEI diaphragm, effectively stops separating out of manganese ion, thereby improves the cycle performance that LiMn2O4 is the positive electrode lithium ion battery.
Embodiment
Can be at the lithium-ion battery electrolytes of anodal film forming, composition: non-aqueous organic solvent 77% ~ 86%, lithium salts 12% ~ 18% and additive 2% ~ 5%; The mixture that additive is tetraethoxysilane and vinylene carbonate, its percentage by weight is: tetraethoxysilane 40% ~ 60%, ethylene carbonate 40% ~ 60%.The mixture that non-aqueous organic solvent is dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate, its percentage by weight is: dimethyl carbonate 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%.Lithium salts is lithium hexafluoro phosphate.
Can be in the preparation technology of the lithium-ion battery electrolytes of anodal film forming:
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 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 77% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 18% lithium salts, obtain electrolyte;
3) 2% ~ 5% additive is added in above-mentioned electrolyte, mix, obtain multifunctional lithium ion battery electrolyte.
Embodiment 1
Under the enclosed environment condition of moisture≤10ppm, 33g dimethyl carbonate, 34g ethylene carbonate, 33g 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 the 5.8g tetraethoxysilane to add again the 3.2g vinylene carbonate, stir and within 30 minutes, obtain high-temperature lithium-ion battery electrolyte.
Embodiment 2
Under the enclosed environment condition of moisture≤10ppm, 33g dimethyl carbonate, 34g ethylene carbonate, 33g 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 the 7.2g tetraethoxysilane to add again the 1.8g vinylene carbonate, stir and within 30 minutes, obtain high-temperature lithium-ion battery electrolyte.
Embodiment 3
Under the enclosed environment condition of moisture≤10ppm, 33g dimethyl carbonate, 34g ethylene carbonate, 33g 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 the 4.5g tetraethoxysilane to add again the 4.5g vinylene carbonate, stir and within 30 minutes, obtain high-temperature lithium-ion battery electrolyte.
Embodiment 4
Under the enclosed environment condition of moisture≤10ppm, 33g dimethyl carbonate, 34g ethylene carbonate, 33g 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 the 5.2g tetraethoxysilane to add again the 3.8g vinylene carbonate, stir and within 30 minutes, obtain high-temperature lithium-ion battery electrolyte.
Comparative example
Under the enclosed environment condition 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 LiMn2O4 is positive electrode, the soft-package battery that Delanium is negative pole.
Table 1
In sum, additive tetraethoxysilane of the present invention can form on the surface of LiMn2O4 one deck SEI diaphragm, effectively stops separating out of manganese ion, thereby improves the cycle performance that LiMn2O4 is the positive electrode lithium ion 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. can, at the lithium-ion battery electrolytes of anodal film forming, it is characterized in that comprising following percentage by weight composition: non-aqueous organic solvent 77% ~ 86%, lithium salts 12% ~ 18% and additive 2% ~ 5%; The mixture that described additive is tetraethoxysilane and vinylene carbonate, its percentage by weight is: tetraethoxysilane 40% ~ 60%, ethylene carbonate 40% ~ 60%.
2. according to claim 1 can be at the lithium-ion battery electrolytes of anodal film forming, 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 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%.
3. according to claim 1 can, at the lithium-ion battery electrolytes of anodal film forming, it is characterized in that: described lithium salts is lithium hexafluoro phosphate.
4. claimed in claim 1 can, in the preparation method of the lithium-ion battery electrolytes of anodal film forming, it 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 15% ~ 25%, methyl ethyl carbonate 35% ~ 55%, ethylene carbonate 20% ~ 60%; Obtain non-aqueous organic solvent;
2) get above-mentioned non-aqueous organic solvent 77% ~ 86%, shelve 4h at-10 ℃ in the closed container of packing into and take out; In the glove box of moisture≤10ppm, add 12% ~ 18% lithium salts, obtain electrolyte;
3) 2% ~ 5% additive is added in above-mentioned electrolyte, mix, obtain multifunctional lithium ion battery electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103850836A CN103427116A (en) | 2013-08-29 | 2013-08-29 | Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103850836A CN103427116A (en) | 2013-08-29 | 2013-08-29 | Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103427116A true CN103427116A (en) | 2013-12-04 |
Family
ID=49651555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103850836A Pending CN103427116A (en) | 2013-08-29 | 2013-08-29 | Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103427116A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684445A (en) * | 2016-07-14 | 2017-05-17 | 四川美亚达光电科技有限公司 | Electrolyte capable of improving performance of lithium manganate lithium ion battery |
| CN106785044A (en) * | 2017-02-13 | 2017-05-31 | 宁德新能源科技有限公司 | A kind of electrolyte and secondary cell |
| EP3404762A4 (en) * | 2017-01-26 | 2019-05-22 | LG Chem, Ltd. | Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising same |
| CN109818065A (en) * | 2019-04-01 | 2019-05-28 | 北京工商大学 | The high-voltage electrolyte and preparation method containing additive for lithium ion secondary battery |
| CN114421009A (en) * | 2020-10-28 | 2022-04-29 | 陕西泽邦环境科技有限公司 | Long-life lithium ion battery electrolyte and application thereof |
| US11444321B2 (en) | 2019-12-19 | 2022-09-13 | National Taiwan University Of Science And Technology | Treating method of non-aqueous electrolyte and method of fabricating battery |
-
2013
- 2013-08-29 CN CN2013103850836A patent/CN103427116A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684445A (en) * | 2016-07-14 | 2017-05-17 | 四川美亚达光电科技有限公司 | Electrolyte capable of improving performance of lithium manganate lithium ion battery |
| CN106684445B (en) * | 2016-07-14 | 2019-05-31 | 四川美亚达光电科技有限公司 | A kind of electrolyte improving lithium manganate lithium ion battery performance |
| EP3404762A4 (en) * | 2017-01-26 | 2019-05-22 | LG Chem, Ltd. | Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising same |
| CN106785044A (en) * | 2017-02-13 | 2017-05-31 | 宁德新能源科技有限公司 | A kind of electrolyte and secondary cell |
| CN106785044B (en) * | 2017-02-13 | 2020-01-14 | 宁德新能源科技有限公司 | Electrolyte and secondary battery |
| CN109818065A (en) * | 2019-04-01 | 2019-05-28 | 北京工商大学 | The high-voltage electrolyte and preparation method containing additive for lithium ion secondary battery |
| US11444321B2 (en) | 2019-12-19 | 2022-09-13 | National Taiwan University Of Science And Technology | Treating method of non-aqueous electrolyte and method of fabricating battery |
| CN114421009A (en) * | 2020-10-28 | 2022-04-29 | 陕西泽邦环境科技有限公司 | Long-life lithium ion battery electrolyte and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102738442B (en) | A kind of high energy density charge-discharge lithium battery | |
| CN103779607B (en) | A kind of electrolyte and lithium rechargeable battery | |
| CN103427116A (en) | Lithium-ion battery electrolyte capable of forming film at positive pole and preparation method thereof | |
| CN103441305A (en) | Power and energy storage lithium-ion battery and preparation method thereof | |
| CN102479947B (en) | A kind of anode material for lithium-ion batteries and preparation method thereof and a kind of lithium ion battery | |
| CN104124468A (en) | High voltage lithium battery electrolyte and high energy lithium battery containing the same | |
| CN102082259A (en) | Lithium secondary battery electrodes and production method thereof | |
| CN104466248A (en) | Electrolyte of lithium ion battery and lithium ion battery utilizing same | |
| CN103928707A (en) | High voltage lithium ion battery functional electrolyte and preparation method and application | |
| CN103427068A (en) | Anode material for lithium-sulfur batteries and preparation method of anode material | |
| CN101662046A (en) | Lithium ion battery | |
| CN103022566A (en) | Soaking method for isolating membrane of ceramic isolating membrane lithium ion battery | |
| CN102055017A (en) | Carbonic ester electrolyte with annular sultone and oxalyl lithium tetraborate composition added | |
| CN106340671B (en) | Lithium ion battery and electrolyte thereof | |
| CN100483841C (en) | A low temperature working lithium ion secondary battery | |
| CN103427114A (en) | Multifunctional lithium-ion battery electrolytic solution and preparing method thereof | |
| CN105576291A (en) | Lithium ion battery and electrolyte for high-voltage lithium ion battery | |
| CN102299375B (en) | Lithium ion power battery and preparation method thereof | |
| CN104993148A (en) | Synthesizing method for lithium-ion positive electrode material of LiCoO2/C | |
| CN104409704A (en) | Nano porous oxide electrode material for lithium ion battery | |
| CN104282895A (en) | Negative electrode material applied to lithium ion battery and preparation method of negative electrode material | |
| CN104157903A (en) | High-voltage lithium ion battery carbonate-based electrolyte solution and preparation method and application thereof | |
| CN103579665A (en) | Gel lithium ion battery with high and low temperature balance and fabrication method thereof | |
| CN111244544B (en) | Preparation method of functional electrolyte for cathode interface film of self-assembled 5V lithium nickel manganese oxide lithium ion battery | |
| CN107394270A (en) | Electrolyte for improving lithium titanate battery cyclical stability and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |