CN104183826A - Slow-release method for lithium hexafluorophosphate of lithium battery and preparation method of lithium battery - Google Patents
Slow-release method for lithium hexafluorophosphate of lithium battery and preparation method of lithium battery Download PDFInfo
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- CN104183826A CN104183826A CN201410354050.XA CN201410354050A CN104183826A CN 104183826 A CN104183826 A CN 104183826A CN 201410354050 A CN201410354050 A CN 201410354050A CN 104183826 A CN104183826 A CN 104183826A
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- lithium
- battery
- hexafluoro phosphate
- lithium hexafluoro
- fluoride
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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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
- H01M10/058—Construction or manufacture
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/582—Halogenides
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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 discloses a slow-release method for lithium hexafluorophosphate of a lithium battery. The method comprises the steps of weighing and mixing lithium hexafluorophosphate and a fluoride in a mass ratio of (1-0.1): 1, then adding N-methylpyrrolidone to the mixture of the lithium hexafluorophosphate and the fluoride till the humidity of the mixture is 0.5-5%, performing physical stirring to sufficiently coat the surface of the lithium hexafluorophosphate with the fluoride, and preparing the lithium battery by using lithium hexafluorophosphate. By detecting under national standard charge and discharge conditions, when the battery is cycled for 6,000 weeks, the capacity retention ratio is more than 80%, and the internal resistance is over 10% lower than that of a battery without the hexafluorophosphate material; charges of the battery are stored for 7 days at the high temperature of 55 DEG C, the charge retention ratio of the battery is 99.2%, and the capacity recovery rate is 99.50%; and through charge, over-discharge and short circuit tests, the battery does not fire, explode, fume or leak.
Description
Technical field
The invention belongs to lithium ion battery and manufacture field, be specifically related to a kind of lithium hexafluoro phosphate in lithium battery be carried out to preliminary treatment, thus a kind of lithium battery lithium hexafluoro phosphate release method and the preparation technology thereof that extend circulating battery number of times.
Background technology
Along with the minimizing of global fossil fuel; the whole world is faced with serious energy crisis, environmental crisis; China; European and American developed countries etc. all the focus of technological innovation at New Energy Industry; lithium ion battery seems particularly important as secondary cell of new generation, and the development and application of therefore strengthening lithium-ion electric pool technology has real meaning.
Lithium ion battery has following characteristics: (1) has high-energy-density, and its battery specific energy is 1.5 times of Ni/MH, three times of Cd/Ni battery; Under equal capacity, lithium ion battery is lightweight, and its volumetric specific energy is Ni/MH battery and Cd/Ni battery 1.5-2 times; (2) operating voltage is Ni/Cd or Ni/MH cell voltage 3 times; (3) pollution-free, environmental protection, does not contain the poisonous and harmful substances such as nickel, cadmium in lithium ion battery, be environmental protection battery; (4) high load capability, current continuity electric discharge greatly, thus this battery can be used on the high-power electric appliance such as video camera, laptop computer; (5) long service life, now electric automobile is to will be the useful life of battery more than 4000 times, travel more than 100,000 kilometers, and it is no problem to the useful life of cell, and the requirement of electric automobile will reach more than 4000 times after in groups, so just require reach more than 6000 times the useful life of cell.
At present, lithium is that positive and negative pole material is made after positive/negative plate from the general production technology of battery, adds that barrier film is after the shell of reeling, then adds after electrolyte (Main Ingredients and Appearance in electrolyte is lithium hexafluoro phosphate), just makes finished product battery more respectively after forming and capacity dividing.Finished product battery is put into after test cashier's office in a shop, carry out again the test that charges and discharge repeatedly, battery is in the test of carrying out repeatedly, will consume in a large number the lithium hexafluoro phosphate in electrolyte, thereby can greatly shorten the life-span of battery, in order to address this problem, traditional method is to improve the content of lithium hexafluoro phosphate in electrolyte; But so also can affect other performance of electrolyte, can not be from the fast problem that decays of basic solution battery later stage.
Summary of the invention
In order to overcome the shortcoming of currently available technology, extend the cycle-index of lithium battery, the present invention carries out preliminary treatment by the lithium hexafluoro phosphate in lithium battery, formation is similar to spansule and possesses the lithium hexafluoro phosphate of slow release function, then lithium hexafluoro phosphate is accomplished to go in positive/negative plate, then through reeling, fluid injection, change into, partial volume is made lithium battery, loop test shows: test after more than 3000 time at circulating battery, being coated on the lip-deep capsule of lithium hexafluoro phosphate starts swelling or deeply separates, new lithium hexafluoro phosphate starts to discharge, so just there is new lithium ion to supplement the lithium ion having consumed, the circulation of battery subtracts by mistake and will greatly extend to more than 6000 times like this, thereby meet the high circulation of lithium battery, long-life, slow demand decays.
For achieving the above object, the present invention is by the following technical solutions: a kind of lithium battery lithium hexafluoro phosphate release method, measure lithium hexafluoro phosphate, fluoride and mix according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface.
Adopt lithium hexafluoro phosphate release method to make a technique for lithium ion battery battery, adopt following sequential steps preparation:
A measures lithium hexafluoro phosphate, fluoride and mixes according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface and form slurry A;
B is coated in lithium battery anode slurry or cathode size on both positive and negative polarity collector;
The slurry A that C obtains steps A is coated on the both positive and negative polarity collector that step B makes, and then carries out baking operation and makes positive plate of lithium battery or negative plate;
The positive plate that D makes step C or negative plate are placed in three district's baking boxs, and the temperature of three district's baking boxs is followed successively by 80-90 DEG C, 90-110 DEG C, 90-110 DEG C, and positive plate or negative plate go out baking box;
The positive plate that E makes step D or negative plate carry out roll-in, coiling, fluid injection, change into, partial volume is made battery.
As preferably, described fluoride is one or both in Kynoar, polytetrafluoroethylene.
As preferably, described anode sizing agent comprises following component materials: 1 ~ 5% binding agent, 1 ~ 5% conductive agent, 40 ~ 60% solvents, 97 ~ 89% positive electrodes.
As preferably, described anode sizing agent comprises following component materials: 1 ~ 5% binding agent, 1 ~ 5% conductive agent, 40 ~ 60% solvents, 97 ~ 89% negative materials.
As preferably, described binding agent is one or both in Kynoar, polytetrafluoroethylene.
As preferably, described conductive agent is superconduction alkynes second carbon black.
As preferably, described solvent is the one or more combination in ethylene carbonate, dimethyl carbonate, diethyl carbonate.
As preferably, described negative material is carbon.
As preferably, described positive electrode is one or more in LiFePO4, cobalt acid lithium, LiMn2O4, ternary system material, binary system material.
Compared with prior art, in the present invention, in positive and negative pole material, add after the hexafluoro material that possesses slow release effect, can significantly improve the cycle-index of battery, increase the service life thereby cell decay is full, increase the consumption of ionic conduction ability, the internal resistance of minimizing battery polarization, minimizing lithium ion simultaneously.
Brief description of the drawings
For the present invention will be further described, enumerate schematic process chart and embodiment below.
Fig. 1 process chart of the present invention.
Embodiment
As shown in Figure 1, a kind of lithium battery lithium hexafluoro phosphate release method, measure lithium hexafluoro phosphate, fluoride and mix according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface.
Adopt lithium hexafluoro phosphate release method to make a technique for lithium ion battery battery, adopt following sequential steps preparation:
A measures lithium hexafluoro phosphate, fluoride and mixes according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface and form slurry A;
B is coated in lithium battery anode slurry or cathode size on both positive and negative polarity collector;
The slurry A that C obtains steps A is coated on the both positive and negative polarity collector that step B makes, and then carries out baking operation and makes positive plate of lithium battery or negative plate;
The positive plate that D makes step C or negative plate are placed in three district's baking boxs, and the temperature of three district's baking boxs is followed successively by 80-90 DEG C, 90-110 DEG C, 90-110 DEG C, and positive plate or negative plate go out after baking box, and its surface temperature remains on 80-98 DEG C
The positive plate that E makes step D or negative plate carry out roll-in, coiling, fluid injection, change into, partial volume is made battery.
Enumerate embodiment below:
Embodiment 1: measure lithium hexafluoro phosphate, fluoride and mix according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface and form slurry A, stand-by: to configure anode sizing agent traditionally and cathode size is stand-by:
Anode sizing agent or cathode size are coated on both positive and negative polarity collector, then on both positive and negative polarity collector, apply slurry A, after oven drying, be prepared into electrodes of lithium-ion batteries, pole piece toasts through baking oven in advance before roll-in, baking oven has three joints, it is 90 DEG C that oven temperature sets gradually after pole piece enters, 100 DEG C, 100 DEG C, pole piece makes the surface temperature of pole piece remain 95 DEG C after going out baking box, then pole piece is with the speed roll-in of 10m/min, be assembled into 18650 cylindrical batteries in the mode of reeling, in the time of fluid injection, reinjecting, (composition of electrolyte is that solute adopts lithium hexafluoro phosphate to electrolyte, solvent adopts ethylene carbonate, dimethyl carbonate, the mixed solvent of diethyl carbonate, ethylene carbonate, dimethyl carbonate, the volume ratio of diethyl carbonate is 1:1: 1), through changing into, the chemical property of test battery after partial volume: under the condition discharging and recharging in national standard, when circulating battery 6000 weeks, capability retention is more than 80%, internal resistance is than not add hexafluoro material cell low more than 10%, battery was 55 DEG C of charged storages of high temperature 7 days, and the charged conservation rate of battery is 99.2%, and capacity restoration rate is 99.50%, battery through overcharging, cross put, short-circuit test, battery is not on fire, do not explode, do not smolder, no leakage.
Obviously, above-mentioned execution mode is only preferred embodiments of the present invention, and any simple modifications on this basis, all belongs to protection scope of the present invention.
Claims (10)
1. a lithium battery lithium hexafluoro phosphate release method, it is characterized in that measuring lithium hexafluoro phosphate, fluoride and mixing according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface.
2. adopt lithium hexafluoro phosphate release method to make a technique for lithium ion battery battery, it is characterized in that adopting following sequential steps preparation:
A measures lithium hexafluoro phosphate, fluoride and mixes according to the ratio of mass ratio 1 ~ 0.1:1, then be 0.5%-5% to adding nitrogen methyl pyrrolidone to its humidity in the mixture of lithium hexafluoro phosphate and fluoride composition, carry out physical agitation, make fluoride fully be coated on lithium hexafluoro phosphate surface and form slurry A;
B is coated in lithium battery anode slurry or cathode size on both positive and negative polarity collector;
The slurry A that C obtains steps A is coated on the both positive and negative polarity collector that step B makes, and then carries out baking operation and makes positive plate of lithium battery or negative plate;
The positive plate that D makes step C or negative plate are placed in three district's baking boxs, and the temperature of three district's baking boxs is followed successively by 80-90 DEG C, 90-110 DEG C, 90-110 DEG C, and positive plate or negative plate go out baking box;
The positive plate that E makes step D or negative plate carry out roll-in, coiling, fluid injection, change into, partial volume is made battery.
3. a kind of lithium battery lithium hexafluoro phosphate release method according to claim 1 and 2 and preparation technology thereof, is characterized in that described fluoride is one or both in Kynoar, polytetrafluoroethylene.
4. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described anode sizing agent comprises following component materials: 1 ~ 5% binding agent, 1 ~ 5% conductive agent, 40 ~ 60% solvents, 97 ~ 89% positive electrodes.
5. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described anode sizing agent comprises following component materials: 1 ~ 5% binding agent, 1 ~ 5% conductive agent, 40 ~ 60% solvents, 97 ~ 89% negative materials.
6. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described binding agent is one or both in Kynoar, polytetrafluoroethylene.
7. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described conductive agent is superconduction alkynes second carbon black.
8. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described solvent is the one or more combination in ethylene carbonate, dimethyl carbonate, diethyl carbonate.
9. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described negative material is carbon.
10. a kind of technique that adopts lithium hexafluoro phosphate release method to make lithium ion battery battery according to claim 2, is characterized in that described positive electrode is one or more in LiFePO4, cobalt acid lithium, LiMn2O4, ternary system material, binary system material.
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| CN201410354050.XA CN104183826A (en) | 2014-07-23 | 2014-07-23 | Slow-release method for lithium hexafluorophosphate of lithium battery and preparation method of lithium battery |
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| CN201410354050.XA CN104183826A (en) | 2014-07-23 | 2014-07-23 | Slow-release method for lithium hexafluorophosphate of lithium battery and preparation method of lithium battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546362A (en) * | 2017-07-17 | 2018-01-05 | 上海工程技术大学 | A kind of electrode with pyroelectric effect and its preparation method and application |
| CN109768220A (en) * | 2018-12-28 | 2019-05-17 | 东莞凯德新能源有限公司 | A method of reducing lithium ion battery self discharge |
| CN110221224A (en) * | 2019-07-01 | 2019-09-10 | 中兴高能技术有限责任公司 | Prediction technique, device and the storage medium of battery cycle life |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10151830A1 (en) * | 2001-10-20 | 2003-04-30 | Dilo Trading Ag Zug | Lithium secondary battery, especially lithium-polymer stacked or wound battery, contains microcapsules with suitable contents in cathode and/or anode composition and/or separator |
| CN1780031A (en) * | 2004-11-17 | 2006-05-31 | 比亚迪股份有限公司 | Anode of lithium ion cell and lithium ion cell |
| CN101188310A (en) * | 2007-12-14 | 2008-05-28 | 山东海霸通讯设备有限公司 | A phosphate Fe, lithium and aluminum shell column battery and its making technology |
-
2014
- 2014-07-23 CN CN201410354050.XA patent/CN104183826A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10151830A1 (en) * | 2001-10-20 | 2003-04-30 | Dilo Trading Ag Zug | Lithium secondary battery, especially lithium-polymer stacked or wound battery, contains microcapsules with suitable contents in cathode and/or anode composition and/or separator |
| CN1780031A (en) * | 2004-11-17 | 2006-05-31 | 比亚迪股份有限公司 | Anode of lithium ion cell and lithium ion cell |
| CN101188310A (en) * | 2007-12-14 | 2008-05-28 | 山东海霸通讯设备有限公司 | A phosphate Fe, lithium and aluminum shell column battery and its making technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546362A (en) * | 2017-07-17 | 2018-01-05 | 上海工程技术大学 | A kind of electrode with pyroelectric effect and its preparation method and application |
| CN109768220A (en) * | 2018-12-28 | 2019-05-17 | 东莞凯德新能源有限公司 | A method of reducing lithium ion battery self discharge |
| CN110221224A (en) * | 2019-07-01 | 2019-09-10 | 中兴高能技术有限责任公司 | Prediction technique, device and the storage medium of battery cycle life |
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