CN105895845A - Preparation methods of gel electrolyte separator and lithium ion battery - Google Patents
Preparation methods of gel electrolyte separator and lithium ion battery Download PDFInfo
- Publication number
- CN105895845A CN105895845A CN201410714376.9A CN201410714376A CN105895845A CN 105895845 A CN105895845 A CN 105895845A CN 201410714376 A CN201410714376 A CN 201410714376A CN 105895845 A CN105895845 A CN 105895845A
- Authority
- CN
- China
- Prior art keywords
- gel electrolyte
- manufacture method
- polymer
- electrolyte separator
- separator
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a preparation method of a gel electrolyte separator, and aims at providing a high-safety gel electrolyte separator and a lithium ion battery. The preparation method comprises the following steps of integrally dissolving soluble macromolecular polymer micro powder and an organic solvent to prepare polymer paste; and applying the polymer paste onto the surface of a separator substrate, and volatilizing the organic solvent through heating so that a polymerization coating layer is uniformly reserved on the surface of the separator substrate to form a polymer coating layer. The invention also discloses a preparation method of the polymer lithium ion battery. Compared with a liquid-state lithium ion battery, the battery prepared by adopting the separator has the advantages that the cycle service lifetime is prolonged by near 30%, a recycle gas bubble phenomenon is solved, and the safety can be effectively improved.
Description
Technical field
The present invention relates to a kind of lithium ion battery, more precisely a kind of polymer Li-ion battery.
Background technology
Lithium ion battery has that energy density is big, average output voltage is high, self discharge is little, do not have memory effect, length in service life,
Do not conform to the plurality of advantages such as poisonous and harmful substance and be increasingly widely applied, be referred to as green battery.
The polymer Li-ion battery of domestic production at present is liquid lithium ion flexible-packed battery (soft-package battery), and this battery heat is steady
Qualitative difference, pressure impact, gravitational thrusts, acupuncture etc. be susceptible to applaud or blast, security performance is low；And international well-known product
The polymer battery (solid state battery) that board produces, all solves the problems referred to above, but, produce above-mentioned solid polymer cell needs
Production equipment the most advanced, cost is higher.Therefore, it is badly in need of developing the polymer lithium electricity of the low high security of a kind of production cost
Pond.
Summary of the invention
The present invention is to solve the technical problem that prior art polymer Li-ion battery production cost is high, it is provided that a kind of gel electricity
Solve matter barrier film and the manufacture method of lithium ion battery.
For solving above-mentioned technical problem, the technical solution used in the present invention is to design the manufacture method of a kind of gel electrolyte separator,
Comprise the following steps:
Soluble high molecular polymers micropowder and organic solvent melt into are made into integration polymer paste；
Described polymer paste is coated on the surface of diaphragm matrix, and volatile organic solvent forms polymer on the surface of diaphragm matrix
Coating.
Described soluble high molecular polymers micropowder is poly-two vinylidenes or modified poly-two vinylidenes, and described organic solvent is high
Concentration acetone or N-Methyl pyrrolidone.
The concentration of described polymer paste is 5%-40%, and coated weight is 0.5-5 gram/m.
The thickness of described polymer coating is 0.5-5 μm.
Described volatile organic solvent forms polymer coating step and includes making organic solvent volatilize by baking on the surface of diaphragm matrix
Described polymer coating is formed the secondary pore-creating step in hole.
Described diaphragm matrix is the microporous membrane of polyethylene, polypropylene or a combination thereof.
The porosity of described diaphragm matrix is 30%-60%, and air permeability is 50-700Sec/100ml, and thickness is 5-100 μm.
Described coating includes dip-coating, sprays, prints or be coated with.
The invention also discloses the manufacture method of a kind of lithium ion battery, the above-mentioned gel electrolyte of manufacture method of described lithium ion battery
The manufacture method of matter barrier film.
The manufacture method of lithium ion battery also includes: makes battery pole group, and adds loading electrolyte encapsulation, make electrolyte just be impregnated into,
In the hole of negative pole and described gel electrolyte separator；
The battery having permeated electrolyte is positioned over inside hot press apply some temperature, some pressure carries out gel, gel poly-
Compound and electrolyte are mixed into gelated electrolyte；
Battery being transplanted on cold press apply same pressure and be rapidly cooled to room temperature, electrolyte is firmly pinned at inside battery,
Form gel electrolyte.
The invention also discloses a kind of gel electrolyte separator using said method to make.
The present invention by use common diaphragm as diaphragm matrix, and in diaphragm matrix coat gelatin polymer, formed polymer be coated with
Layer, thus can be on the premise of not increasing the production equipment of any advanced person, the polymer Li-ion battery of production department's high-quality, technique
Simply, production cost is low.
Accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, wherein:
Fig. 1 is the SEM electron-microscope scanning picture of diaphragm matrix of the present invention；
Fig. 2 is diaphragm matrix coated polymer of the present invention through secondary pore-creating finished product SEM electron-microscope scanning picture；
Fig. 3 is cell orifice SEM electron-microscope scanning picture after secondary pore-creating of the present invention；
Fig. 4 is the structural representation of inventive gel electrolyte membrance.
Detailed description of the invention
The detailed description of the invention of the present invention be expanded on further below in conjunction with the accompanying drawings:
Polymer Li-ion battery is the most identical with the operation principle of other lithium ion batteries, is all to be created by lithium ion displacement
Electric current, except for the difference that polymer battery is solid-state, and lithium ion does displacement through polymer hole；Gel electrolyte separator
Also using this principle in the application, by polymer gel, electrolyte tightly be locked among polymer hole, it is simple to
Lithium ion does displacement.
Inventive gel electrolyte membrance as matrix, coats gelatin polymer, finally with existing common diaphragm on matrix surface
Form the functional coating of 0.5-5 μ m thick；This barrier film fills electrolyte encapsulation after assembling, under the effect of heating power, make gel
Coating becomes " foaming shape ", and electrolyte forms gelated electrolyte in entering polymeric interstices, is adsorbed in respectively on positive and negative plate,
By becoming solid polymer cell after some pressure cooled and solidified, whole production process maintains original production technology and making
Flow process, it is not necessary to increase any equipment.
The manufacture method of inventive gel electrolyte membrance, comprises the following steps:
1, soluble high molecular polymers micropowder and organic solvent melt into are made into integration polymer paste.
Described soluble high molecular polymers micropowder is poly-two vinylidenes or modified poly-two vinylidenes, and described organic solvent is high
Concentration acetone or N-Methyl pyrrolidone.
According to the needs of battery design, the concentration of slurry is 5%-40%, and coated weight is 0.5-5 gram/m.
According to practical situation, dividing according to coated weight, the coated weight of low painting is 0.5-1.0 gram/m, and coating thickness is
0.5-1.0μm；The coated weight of middle painting is 1.5-2.5 gram/m, and coating thickness is 1.5-2.5 μm；The high coated weight being coated with
For 2.5-5.0 gram/m, coating thickness is 2.5-5.0 μm.Coated weight is the lowest, barrier film and the adhesive effect of positive/negative plate
The poorest.
2, described polymer paste is coated on the surface of diaphragm matrix, and volatile organic solvent forms polymerization on the surface of diaphragm matrix
Thing coating.
Described volatile organic solvent forms polymer coating step and includes making organic solvent volatilize by baking on the surface of diaphragm matrix
Described polymer coating is formed the secondary pore-creating step in hole.
The present invention uses common diaphragm as diaphragm matrix, coats the above-mentioned polymer paste made, uses the side of extraction simultaneously
Method carries out secondary pore-creating.In this specific embodiment, secondary pore-creating is to make organic solvent volatilization be coated with at described polymer by baking
Forming hole on Ceng, i.e. by baking, accelerate organic solvent volatilization, the place that organic solvent is evaporated just has become hole, and this is just
It is secondary pore-creating.Secondary pore-creating is to not hinder positive and negative electrode ionic communication.
Structure before and after coating and pore-creating refers to Fig. 1, Fig. 2 and Fig. 3, and wherein, Fig. 1 is the SEM electron-microscope scanning of diaphragm matrix
Picture, Fig. 2 is diaphragm matrix coated polymer through secondary pore-creating finished product SEM electron-microscope scanning picture, and Fig. 3 is secondary pore-creating
Rear cell orifice SEM electron-microscope scanning picture, 301 is diaphragm matrix, and 302 is polymer.
After above-mentioned pore-creating, one-shot forming, the coated separator of 0.5-5 μ m thick is finally formed at matrix surface.
As shown in Figure 4, wherein 401 is polymer to the structure of the gel electrolyte separator ultimately formed；402 is diaphragm matrix.
Diaphragm matrix can use the microporous membrane of polyethylene, polypropylene or a combination thereof, and porosity is 30%-60%, air permeability
For 50-700Sec/100ml, thickness is 5-100 μm.
The porosity barrier film less than 30% can cause battery high internal resistance, and the porosity barrier film more than 60% can cause internal short-circuit of battery；
Air permeability is with porosity inversely under normal circumstances, and porosity is high, and air permeability is the lowest；Porosity is low, and air permeability is the highest.
The method of coating includes dip-coating, sprays, prints or be coated with.
The gel electrolyte separator made of the present invention is used to highlight function:
1, security performance is substantially improved, and is embodied in the following:
A, acupuncture: do not explode, the most on fire
B, fall: well-tended appearance, without substantially damage
C, overcharge: 3C10V smoothly passes
D, vibrations: do not rouse shell, the most on fire
E, roll: do not explode, the most on fire
2, cycle life: arrive the cycle-index of 80%, under similarity condition, relatively liquid soft-package battery raising more than 30% follows
The ring life-span.
3, outward appearance: smooth, solid, recycle after thickness do not rebound, occur without soft, avalanche sign.
The invention also discloses the manufacture method of a kind of lithium ion battery, which includes the manufacturer of above-mentioned gel electrolyte separator
Method.
After making gel electrolyte separator, make battery pole group, and add loading electrolyte encapsulation, make electrolyte just be impregnated into,
In the hole of negative pole and described gel electrolyte separator.In the process, after battery pole group completes, fill electrolyte, packaged,
Standing 24 hours with 50 DEG C, make electrolyte be impregnated into completely in positive and negative electrode and barrier film hole, this process is exactly process of osmosis.
Then, the battery having permeated electrolyte is positioned over inside hot press apply some temperature, some pressure carries out gel, glue
The polymer changed and electrolyte are mixed into gelated electrolyte；
Finally, battery being transplanted on cold press and applies same pressure and be rapidly cooled to room temperature, electrolyte is firmly pinned at electricity
Inside pond, form gel electrolyte.In the process, battery should be transplanted on cold press and applies same within the shortest time
The pressure of sample is also rapidly cooled to room temperature, and this is gel process, through this process, liquid lithium ionic cell becomes solid-state
Polymer battery, electrolyte is firmly pinned inside battery, here it is gel electrolyte is formed.The result ultimately formed be just,
Powder on negative plate completely disengages from positive and negative electrode, is adsorbed in barrier film two surface completely, here it is the result that polymer gel produces.
The present invention by use common diaphragm as diaphragm matrix, and in diaphragm matrix coat gelatin polymer, formed polymer be coated with
Layer, thus can be on the premise of not increasing the production equipment of any advanced person, the polymer Li-ion battery of production department's high-quality, technique
Simply, production cost is low.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and former
Any amendment, equivalent and the improvement etc. made within then, should be included within the scope of the present invention.
Claims (10)
1. the manufacture method of a gel electrolyte separator, it is characterised in that comprise the following steps:
Soluble high molecular polymers micropowder and organic solvent melt into are made into integration polymer paste；
Described polymer paste is coated on the surface of diaphragm matrix, and volatile organic solvent forms polymer on the surface of diaphragm matrix
Coating.
The manufacture method of gel electrolyte separator the most according to claim 1, it is characterised in that: described soluble high-molecular
Polymer micropowder is poly-two vinylidenes or modified poly-two vinylidenes, and described organic solvent is high concentration acetone or N-methylpyrrole
Alkanone.
The manufacture method of gel electrolyte separator the most according to claim 2, it is characterised in that: described polymer paste
Concentration is 5%-40%, and coated weight is 0.5-5 gram/m.
The manufacture method of gel electrolyte separator the most according to claim 1, it is characterised in that: described polymer coating
Thickness is 0.5-5 μm.
The manufacture method of gel electrolyte separator the most according to claim 1, it is characterised in that: described volatile organic solvent
Form polymer coating step to include being made organic solvent volatilization shape on described polymer coating by baking on the surface of diaphragm matrix
The secondary pore-creating step of pore-forming.
The manufacture method of gel electrolyte separator the most according to claim 1, it is characterised in that: described diaphragm matrix is poly-
The microporous membrane of ethylene, polypropylene or a combination thereof.
The manufacture method of gel electrolyte separator the most according to claim 6, it is characterised in that: the hole of described diaphragm matrix
Gap rate is 30%-60%, and air permeability is 50-700Sec/100ml, and thickness is 5-100 μm.
The manufacture method of gel electrolyte separator the most according to claim 1, it is characterised in that: described coating include dip-coating,
Spray, print or be coated with.
9. the manufacture method of a lithium ion battery, it is characterised in that: the manufacture method of described lithium ion battery includes claim
The manufacture method of the gel electrolyte separator described in any one of 1-8；
The manufacture method of described lithium ion battery also includes: makes battery pole group, and adds loading electrolyte encapsulation, makes electrolyte be impregnated with
Enter in the hole of positive and negative electrode and described gel electrolyte separator；
The battery having permeated electrolyte is positioned over inside hot press apply some temperature, some pressure carries out gel, gel poly-
Compound and electrolyte are mixed into gelated electrolyte；
Battery being transplanted on cold press apply same pressure and be rapidly cooled to room temperature, electrolyte is firmly pinned at inside battery,
Form gel electrolyte.
10. one kind uses the gel electrolyte separator that method described in any one of claim 1-9 makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410714376.9A CN105895845A (en) | 2014-11-21 | 2014-11-21 | Preparation methods of gel electrolyte separator and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410714376.9A CN105895845A (en) | 2014-11-21 | 2014-11-21 | Preparation methods of gel electrolyte separator and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105895845A true CN105895845A (en) | 2016-08-24 |
Family
ID=56699111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410714376.9A Pending CN105895845A (en) | 2014-11-21 | 2014-11-21 | Preparation methods of gel electrolyte separator and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105895845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293684A (en) * | 2017-06-12 | 2017-10-24 | 深圳天和顺新能源股份有限公司 | The formula and manufacture method of a kind of high safety lithium battery phase transformation barrier film |
| CN115064653A (en) * | 2022-08-18 | 2022-09-16 | 成都特隆美储能技术有限公司 | Safe gel lithium ion battery for energy storage and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393975A (en) * | 2008-10-10 | 2009-03-25 | 深圳市邦凯电子有限公司 | Colloidal state polymer battery and composite diaphragm manufacturing method therefor |
| CN102569703A (en) * | 2012-02-01 | 2012-07-11 | 天津市捷威动力工业有限公司 | Diaphragm and lithium ion battery applying diaphragm |
| CN103028535A (en) * | 2012-12-11 | 2013-04-10 | 天津力神电池股份有限公司 | Membrane gluing method |
| CN103413904A (en) * | 2013-07-10 | 2013-11-27 | 深圳中兴创新材料技术有限公司 | Method for manufacturing diaphragm for polymer lithium ion battery |
-
2014
- 2014-11-21 CN CN201410714376.9A patent/CN105895845A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393975A (en) * | 2008-10-10 | 2009-03-25 | 深圳市邦凯电子有限公司 | Colloidal state polymer battery and composite diaphragm manufacturing method therefor |
| CN102569703A (en) * | 2012-02-01 | 2012-07-11 | 天津市捷威动力工业有限公司 | Diaphragm and lithium ion battery applying diaphragm |
| CN103028535A (en) * | 2012-12-11 | 2013-04-10 | 天津力神电池股份有限公司 | Membrane gluing method |
| CN103413904A (en) * | 2013-07-10 | 2013-11-27 | 深圳中兴创新材料技术有限公司 | Method for manufacturing diaphragm for polymer lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293684A (en) * | 2017-06-12 | 2017-10-24 | 深圳天和顺新能源股份有限公司 | The formula and manufacture method of a kind of high safety lithium battery phase transformation barrier film |
| CN115064653A (en) * | 2022-08-18 | 2022-09-16 | 成都特隆美储能技术有限公司 | Safe gel lithium ion battery for energy storage and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8852787B2 (en) | Batteries having inorganic/organic porous films | |
| WO2016086783A1 (en) | Method for manufacturing lithium ion battery diaphragm, battery diaphragm prepared thereby, and battery | |
| US9752063B2 (en) | Treatment and adhesive for microporous membranes | |
| US10069171B2 (en) | Method for manufacturing all-solid-state lithium ion battery | |
| JP4940367B1 (en) | Separator for nonaqueous electrolyte electricity storage device, nonaqueous electrolyte electricity storage device, and production method thereof | |
| KR20150048082A (en) | A method of applying binder for binding on a separator of secondary battery | |
| CN103746087A (en) | Method for manufacturing lithium-ion battery separators and lithium battery | |
| KR101618428B1 (en) | Electrode structure for a lithium-sulfur secondary cell and method of manufacturing the same | |
| US9692055B2 (en) | Battery cell having a coated electrode and the production thereof | |
| JP6096908B2 (en) | Nonwoven fabric formed from fibers coated with organic binder polymer compound, electrochemical device including the nonwoven fabric, and method for producing the nonwoven fabric | |
| US20180212271A1 (en) | Separator for Lithium-ion Battery, Manufacturing Method Therefor, and Lithium-ion Battery | |
| US10115952B2 (en) | Porous separator having inverse opal structure for secondary battery and method for manufacturing the same | |
| JPWO2019031438A1 (en) | Electrode sheet manufacturing method, all-solid-state battery and all-solid-state battery manufacturing method | |
| JPH0676808A (en) | Battery diaphragm and battery | |
| CN105895845A (en) | Preparation methods of gel electrolyte separator and lithium ion battery | |
| KR101742881B1 (en) | The coating composition contained ionic inorganic particles and membrane for redox flow battery using the same | |
| US11258132B2 (en) | Microbattery separator | |
| CN109037767A (en) | A kind of gel polymer electrolyte diaphragm, lithium ion battery and preparation method thereof | |
| JP2003157823A (en) | Secondary battery and manufacturing method therefor | |
| CN111162232A (en) | Lithium ion battery diaphragm and preparation method thereof | |
| WO2012172787A1 (en) | Separator for non-aqueous electrolyte accumulators, non-aqueous electrolyte accumulator and manufacturing methods therefor | |
| JP4016631B2 (en) | Method for manufacturing lithium ion battery | |
| US20130342961A1 (en) | Membrane | |
| KR20160033984A (en) | Thin film separator with improved thermal safety and method of making the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518000 Guangdong Province, Shenzhen city Longhua District Guanlan community rich Ao Bei Industrial Zone No. 9 Jin Hao Park B building four floor Applicant after: Shenzhen tianheshun new energy Limited by Share Ltd Address before: 518131 Guangdong city of Shenzhen province Baoan District streets Bulong Road South overseas Chinese Village building five unit A No. 210 (Office) Applicant before: Shenzhen Tianheshun Science and Technology Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160824 |
|
| WD01 | Invention patent application deemed withdrawn after publication |