CN106299469A - A kind of adding method of lithium-ion battery electrolytes organic solid additive - Google Patents
A kind of adding method of lithium-ion battery electrolytes organic solid additive Download PDFInfo
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- CN106299469A CN106299469A CN201510243351.XA CN201510243351A CN106299469A CN 106299469 A CN106299469 A CN 106299469A CN 201510243351 A CN201510243351 A CN 201510243351A CN 106299469 A CN106299469 A CN 106299469A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
It is an object of the invention to provide the adding method of a kind of lithium-ion battery electrolytes organic solid additive, utilize the electrolyte that the method is prepared, can effectively ensure product quality, a kind of adding method of lithium-ion battery electrolytes organic solid additive, it is characterized in that comprising the following steps process: raw material selection, the miscible preparation containing high concentration additive miscible fluid, refined, the metering containing high concentration additive miscible fluid are added, the present invention is safe and environment-friendly, energy-conservation, technique, equipment are simple and convenient to operate.Organic solid additive adding method of the present invention has significant advantage compared to after the high temperature melting in industry through utilidor conveying charging.At energy-saving and cost-reducing aspect: the fusing of solvent dissolution mechanism higher temperatures has obvious power savings advantages；Separately, for the additive of relatively high added value, to identical packaging wall built-up, conveyance conduit residual after dissolved dilution, material loss residual value is low.
Description
Technical field
The present invention relates to material and add field, particularly relate to the adding method of a kind of lithium-ion battery electrolytes organic solid additive.
Background technology
Along with society is more and more higher to environmental conservation, energy-saving and cost-reducing requirement; lithium ion battery is considered as the choosing of the ideal of high power capacity, high power battery with its excellent performance; make a breakthrough application in industry energy storage and field of vehicles; electrolyte is as one of big critical material of lithium ion battery four, and its market demand will the sustainable growth with the development of ev industry.
The a small amount of non-energy storage material used in electrochmical power source, some performance of battery can be significantly improved, electrical conductivity, both positive and negative polarity matching performance, the capacity of battery, cycle efficieny, cycle life, reversible capacity and security performance etc. such as electrolyte, people to the selection of additive, use and optimize and done substantial amounts of exploration and trial, the kind of additive and quantity also thus have obtained rapid development.
From the substance classes of additive, the additive of lithium-ion battery electrolytes includes organic additive and inorganic additive.The advantage such as that organic additive has is good with lithium-ion battery electrolytes intersolubility, effect of optimization is good and easy to use, causes the enough attention of people and has obtained rapid development.By contrast, the selection of inorganic additive is faced with bigger limitation.From room temperature existence form, additive is divided into additives gas, liquid additive and solid additive.The use of additives gas makes inner pressure of battery raise, and the safety to battery is unfavorable, has the liquid or solid additive of preferable intersolubility to cause the interest that people are bigger with electrolyte.
Because there being a few solid additive, it is crystalline solid under room temperature, or waxy solid, not there is mobility, the conventional adding method of organic solid additive is by current electrolysis liquid manufacturing: after high temperature melting, and warm pipeline adds.The power consumption during operation of technique now, dangerous, the organic solvent after fusing is once revealed, and toxic gas easily spreads, the most inflammable and explosive, and quality is unstable, lithium-ion battery electrolytes organic solid additive be chronically at easy to change under high temperature, decompose.
Summary of the invention
It is an object of the invention to provide the adding method of a kind of lithium-ion battery electrolytes organic solid additive, utilize the electrolyte that the method is prepared, can effectively ensure product quality,
The adding method of a kind of lithium-ion battery electrolytes organic solid additive, it is characterised in that comprise the following steps process:
(1) the manner of packing of unified change organic solid additive: supplier contacts with raw material, the material package mode of change organic solid additive: be changed to airtight, pressurize packaging by non-pressurize airtight, non-packaging；
(2) the miscible preparation containing high concentration additive miscible fluid: by the quick liquid injection port of pail pack, metering adds the basic organic solvent of preparation target electrolyte in proportion, shake is configured to determine the miscible fluid containing high concentration additive of component after dissolving each other, the concentration of additive is 10%～80%；
(3) refining containing high concentration additive miscible fluid: the most qualified is stored stand-by containing high concentration additive miscible fluid after dehydration, accurate filter filter；
(4) measure interpolation: the qualified miscible fluid containing high concentration additive is airtight, metering adds in the basic electrolyte after dissolving lithium salts detecting after refinement treatment, stirring to dissolving each other completely, detect qualified after can pack warehouse-in.
The pail pack of described organic solid additive includes charging aperture, liquid injection port, gas vent, and described liquid injection port passes through screwed connection snap joint, the subsidiary automatic overvoltage decompression function of described gas vent.
The pail pack of described organic solid additive is pressure, corrosion-resistant, organic solvent-resistant material, and its material can choose rustless steel, stainless steel lining tetrafluoroethene, stainless steel lining polyethylene according to additive kind physical property difference.
The described basic organic solvent for compounding high concentration additive miscible fluid can be the basic organic solvent of preparation target electrolyte: dimethyl carbonate (DMC), Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC), methyl propyl carbonate (MPC), gamma-butyrolacton (GBL), ethyl acetate (EA), ethyl propionate (EP) therein one or more.
The all aqueous solvents high-purity, low after refined of the described basic organic solvent for compounding high concentration additive miscible fluid, avoid introducing new impurity and moisture, described basic organic solvent purity >=99.98% weight, described basic organic solvent moisture is less than 7PPm.
Described filter element of precision filter material is Kynoar or politef, and precision is 0.05～5 μm, to remove the insoluble matter introduced in additive raw material and in dehydration process.
The method can be used for the adding method of the organic solid additive under any room temperature for solid-state such as: PS (PS), succinonitrile (SN), vinylene carbonate (VC), biphenyl (BP), ethyl sulfate (DTD).
The method can be used for the interpolation of gel electrolyte gel (gel) material.
The method can be used for poor fluidity, the interpolation of environmentally sensitive solid additive.
The beneficial effects of the present invention is: the present invention is safe and environment-friendly, energy-conservation, technique, equipment are simple and convenient to operate.Organic solid additive adding method of the present invention has significant advantage compared to after the high temperature melting in industry through utilidor conveying charging.In terms of steady quality: easily decompose rotten, colourity rising under organic materials hot soak condition, therefore this method is not related to heat temperature raising due to material, whole process the most at room temperature operates, more can guarantee that the quality stability of product, and the operation processing procedure of whole organic solid additive, material all flows under air-tight state, it is ensured that additive is not disturbed by outside environmental elements, also ensure that the steady quality of electrolyte product.In terms of working environment, safety, occupational health: the organic solvent after high temperature melting is once revealed, it is inflammable and explosive that toxic gas easily spreads harm worker health, at high temperature organic gas, and this method whole process room temperature operation, comparatively safe reliably.At energy-saving and cost-reducing aspect: the fusing of solvent dissolution mechanism higher temperatures has obvious power savings advantages；For the additive of relatively high added value, to identical packaging wall built-up, conveyance conduit residual after dissolved dilution, material loss residual value is low.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
Note: add each constituent content of additivated reference electrolyte and each index is as follows:
Reference electrolyte:
Ethylene carbonate (EC): Ethyl methyl carbonate (EMC): diethyl carbonate (DEC)=1:1:1 (V)
Lithium hexafluoro phosphate (LiPF6) concentration: 1.0
mol/L
Colourity (APHA) index :≤50；(measured value: 15)
Moisture (Karl_Fischer method) index :≤10PPm；(measured value: 7PPm)
Conductivity indices: 8.45 ± 0.05
ms/cm ；(measured value: 8.47
ms/cm )
The addition of additive is: 5%
Embodiment
1
Taking PS (PS) material of one barrel of non-airtight package of 10Kg, put into the explosion-proof baking oven being set as constant temperature 50 DEG C, after 72 hours, after material melts completely, sampling detects moisture content, colourity；Taking the Ethyl methyl carbonate (EMC) of PS (PS) the material equivalent airtight addition water content 5PPM of one barrel of 10Kg airtight package, vibration is completely dissolved sampling detection moisture content, colourity after process.
Comparative example
1
PS (PS) after airtight addition 100Kg reference electrolyte, addition close addition 5Kg by 5% melt in the electrolyte quota still of a 100L, opens stirring and dissolving and samples detection after 2 hours: moisture, colourity (APHA), electrical conductivity.
In the electrolyte quota still of a 100L airtight addition 100Kg reference electrolyte, by 5% 1,3-propane sultone (PS) content airtight addition 10Kg1, the miscible fluid of 3-propane sultone (PS) and Ethyl methyl carbonate (EMC) is (in actual electrolyte production process, during preparation basic electrolyte, consider that equivalent reduces the quantity of solvent introduced because adding additivated miscible fluid), open stirring and dissolving and after 2 hours, sample detection: moisture, colourity (APHA), electrical conductivity.
Embodiment
2
Take one barrel of non-airtight package of 10Kg succinonitrile (SN) material put into the explosion-proof baking oven being set as constant temperature 80 DEG C, after 72 hours after material melts completely sampling detection moisture content, colourity；Take one barrel of 10Kg airtight package the Ethyl methyl carbonate (EMC) of succinonitrile (SN) material equivalent airtight addition water content 5PPM, vibration is completely dissolved sampling detection moisture content, colourity after process.
Comparative example
2
Succinonitrile (SN) after airtight addition 100Kg reference electrolyte, addition close addition 5Kg by 5% melt in the electrolyte quota still of a 100L, opens stirring and dissolving and samples detection after 2 hours: moisture, colourity (APHA), electrical conductivity.
In the electrolyte quota still of a 100L airtight addition 100Kg reference electrolyte, by 5% the miscible fluid of succinonitrile (SN) content airtight addition 10Kg succinonitrile (SN) and Ethyl methyl carbonate (EMC) (in actual electrolyte production process, during preparation basic electrolyte, consider that equivalent reduces the quantity of solvent introduced because adding additivated miscible fluid), open stirring and dissolving and after 2 hours, sample detection: moisture, colourity (APHA), electrical conductivity.
Comparison and detection data see table:
| Project | Moisture | Colourity | Electrical conductivity | |
| Unit | PPM | APHA index | ms/cm | |
| PS | Supplied materials sample detection | 43 | 8 | / |
| Sample detection after high temperature melting | 40 | 30 | / | |
| Miscible sample detection | 16 | 10 | / | |
| The electrolyte sample detection of preparation after high temperature melting | 10.5 | 25 | 8.45 | |
| The electrolyte sample detection of preparation after miscible | 8.5 | 20 | 8.46 | |
| SN | Supplied materials sample detection | 64 | 10 | / |
| Sample detection after high temperature melting | 63 | 25 | / | |
| Miscible sample detection | 6 | 8 | / | |
| The electrolyte sample detection of preparation after high temperature melting | 11 | 20 | 8.46 | |
| The electrolyte sample detection of preparation after miscible | 7.4 | 15 | 8.46 |
Result shows, the electrolyte technical specification using the inventive method to make is preferable, and each index and performance fully meet the requirement of lithium ion battery.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some improvement, and these improvement also should be regarded as protection scope of the present invention.
Claims (9)
1. the lithium-ion battery electrolytes adding method of organic solid additive, it is characterised in that comprise the following steps process:
(1) the manner of packing of unified change organic solid additive: supplier contacts with raw material, the material package mode of change organic solid additive: be changed to airtight, pressurize packaging by non-pressurize airtight, non-packaging；
(2) the miscible preparation containing high concentration additive miscible fluid: by the quick liquid injection port of pail pack, metering adds the basic organic solvent of preparation target electrolyte in proportion, shake is configured to determine the miscible fluid containing high concentration additive of component after dissolving each other, the concentration of additive is 10%～80%；
(3) refining containing high concentration additive miscible fluid: the most qualified is stored stand-by containing high concentration additive miscible fluid after dehydration, accurate filter filter；
(4) measure interpolation: the qualified miscible fluid containing high concentration additive is airtight, metering adds in the basic electrolyte after dissolving lithium salts detecting after refinement treatment, stirring to dissolving each other completely, detect qualified after can pack warehouse-in.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that the pail pack of described organic solid additive includes charging aperture, liquid injection port, gas vent, described liquid injection port passes through screwed connection snap joint, the subsidiary automatic overvoltage decompression function of described gas vent.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that the pail pack of organic solid additive is that pressure, corrosion-resistant, organic solvent-resistant material is made, its material can choose rustless steel, stainless steel lining tetrafluoroethene, stainless steel lining polyethylene according to additive kind physical property difference.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that for the basic organic solvent of compounding high concentration additive miscible fluid can be preparation target electrolyte basic organic solvent: dimethyl carbonate (DMC), Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC), methyl propyl carbonate (MPC), gamma-butyrolacton (GBL), ethyl acetate (EA), ethyl propionate (EP) therein one or more.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that for the basic organic solvent of compounding high concentration additive miscible fluid be the aqueous solvent high-purity, low after refined, avoid introducing new impurity and moisture, described basic organic solvent purity >=99.98% weight for compounding high concentration additive miscible fluid, the described basic organic solvent moisture ＜ 7PPm for compounding high concentration additive miscible fluid.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that filter element of precision filter material is Kynoar or politef, precision is 0.05～5 μm, to remove the insoluble matter introduced in additive raw material and in dehydration process.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterized in that the method can be used for the adding method of the organic solid additive under any room temperature for solid-state such as: 1,3-propane sultone (PS), succinonitrile (SN), vinylene carbonate (VC), biphenyl (BP), ethyl sulfate (DTD).
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterised in that the method can be used for the interpolation of gel electrolyte gel (gel) material.
The adding method of a kind of lithium-ion battery electrolytes organic solid additive the most as claimed in claim 1, it is characterised in that the method can be used for poor fluidity, the interpolation of environmentally sensitive solid additive.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476124A (en) * | 2023-11-09 | 2024-01-30 | 山东德宜新材料有限公司 | Polyvinylidene fluoride auxiliary filling intelligent control management system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847752A (en) * | 2010-05-26 | 2010-09-29 | 惠州市德赛聚能电池有限公司 | Additive of electrolytic solution of lithium ion battery |
| CN103594735A (en) * | 2013-11-29 | 2014-02-19 | 湖南高远电池有限公司 | Preparation method for lithium titanate lithium ion battery |
| US20140178770A1 (en) * | 2012-02-07 | 2014-06-26 | Battelle Memorial Institute | Electrolytes for dendrite-free energy storage devices having high coulombic effciency |
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2015
- 2015-05-14 CN CN201510243351.XA patent/CN106299469B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847752A (en) * | 2010-05-26 | 2010-09-29 | 惠州市德赛聚能电池有限公司 | Additive of electrolytic solution of lithium ion battery |
| US20140178770A1 (en) * | 2012-02-07 | 2014-06-26 | Battelle Memorial Institute | Electrolytes for dendrite-free energy storage devices having high coulombic effciency |
| CN103594735A (en) * | 2013-11-29 | 2014-02-19 | 湖南高远电池有限公司 | Preparation method for lithium titanate lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476124A (en) * | 2023-11-09 | 2024-01-30 | 山东德宜新材料有限公司 | Polyvinylidene fluoride auxiliary filling intelligent control management system |
| CN117476124B (en) * | 2023-11-09 | 2024-04-30 | 山东德宜新材料有限公司 | Polyvinylidene fluoride auxiliary filling intelligent control management system |
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