CN108321338A - A kind of preparation method of lithium ion battery water system gluing diaphragm - Google Patents
A kind of preparation method of lithium ion battery water system gluing diaphragm Download PDFInfo
- Publication number
- CN108321338A CN108321338A CN201711340877.5A CN201711340877A CN108321338A CN 108321338 A CN108321338 A CN 108321338A CN 201711340877 A CN201711340877 A CN 201711340877A CN 108321338 A CN108321338 A CN 108321338A
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- China
- Prior art keywords
- water system
- lithium ion
- ion battery
- battery water
- preparation
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- 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 kind of preparation methods of lithium ion battery water system gluing diaphragm, include the following steps：S1, dispersant is disperseed in powder aqueous solution to obtain aqueous dispersion；S2, aqueous dispersion and binder are mixed to get liquid phase mixture；S3, by liquid phase mixture rotary spraying on basement membrane, it is dry, obtain lithium ion battery water system gluing diaphragm.A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, the ventilative value of coating film obtained increases smaller, core obtained has certain hardness after hot-pressing, it is captured convenient for manipulator, production efficiency is improved, while all being improved a lot to the high rate performance, cycle performance, volume energy density of battery.
Description
Technical field
The present invention relates to battery material technical field more particularly to a kind of preparation sides of lithium ion battery water system gluing diaphragm
Method.
Background technology
Lithium ion battery has high-energy-density, has extended cycle life, the characteristic of memory-less effect, but with safe and reliable and
Energy fast charging and discharging advantage, therefore as the hot spot of research.Gluing diaphragm plays isolation electronics in lithium ion battery, conduct from
The function of son.The performance of diaphragm can largely influence the electrical property of battery, such as the internal resistance of battery, multiplying power, cycle and self discharge
Etc. performances.
Preparing for water system gluing diaphragm is environmentally safe, and core made from gluing diaphragm has certain hard after hot-pressing
Degree captures convenient for manipulator, improves production efficiency, meanwhile, the spacing after hot pressing between core positive/negative plate reduces, and shortens ion
Diffusion length reduces the internal resistance of cell to improve the high rate performance of battery.The more other coating methods of method of rotary spraying
The obtained ventilative value increase of coating film is smaller, avoids plug-hole phenomenon after coating, ensure that passability of the ion in diaphragm, carry
The cycle performance of high battery.
Invention content
Technical problems based on background technology, the present invention propose a kind of system of lithium ion battery water system gluing diaphragm
Preparation Method, the ventilative value increase of coating film obtained is smaller, and core obtained has certain hardness after hot-pressing, is grabbed convenient for manipulator
It takes, improves production efficiency, while all improving a lot to the high rate performance, cycle performance, volume energy density of battery.
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, dispersant is disperseed in powder aqueous solution to obtain aqueous dispersion；
S2, aqueous dispersion and binder are mixed to get liquid phase mixture；
S3, by liquid phase mixture rotary spraying on basement membrane, it is dry, obtain lithium ion battery water system gluing diaphragm.
Preferably, in S1, dispersant is made of PVP and/or ionic surfactant；
Preferably, ionic surfactant is CMC and/or ammonium polyacrylate salt.
Preferably, in S1, sand mill dispersion and/or double-planet high speed dispersion are separated into.
Preferably, in S1, PVP, CMC and ammonium polyacrylate salt are placed in powder aqueous solution, disperseed using sand mill
To aqueous dispersion
Preferably, in S2, binder is esters of acrylic acid binder or vinyl cyanide binder.
Preferably, in S2, the weight ratio between binder and aqueous dispersion is 3-10:100.
Preferably, in S2, mixed process is slurry to be closed in closing pulp grinder, and the conjunction slurry time is 1.5-2.5h.
Preferably, in S2, in liquid phase mixture solid content be 4%-20%, viscosity 100-1500mPaS.
Preferably, in S3, technological parameter is as follows during rotary spraying：Rotating is 1000-12000r/min, spray
The vertical range of head and basement membrane is 10-15cm, feed rate 50-1000mL/min, coating speed 20-80m/min.
Preferably, in S3, drying temperature is 40-65 DEG C.
Preferably, in S3, the thickness of basement membrane is 9-20mm, and basement membrane is PE films and/or PP films.
Preferably, in S3, PE films are single-layer or multi-layer film, and PP is single-layer or multi-layer film.
Preferably, PE monofilm thickness is 10-15 μm.
Preferably, in S3, the coated face density of lithium ion battery water system gluing diaphragm is 1.2-2.0g/m2。
The present invention obtains aqueous dispersion by the way that raw material powder is selected suitable dispersant and dispersion.Selection is suitable
Binder, adjusts suitable solid content amount and suitable liquid phase mixture is made in viscosity.By way of rotary spraying, rotation is adjusted
The rotating speed of turntable and slurry flow control the size and coated face density of sprinkling drop.The water system gluing that the present invention is prepared
Diaphragm environmental pollution is small, all improves a lot to the high rate performance, cycle performance, volume energy density of battery.
Description of the drawings
Fig. 1 is the normal temperature circulation curve graph of the lithium ion battery water system gluing diaphragm proposed in the embodiment of the present invention 3.
Specific implementation mode
As shown in FIG. 1, FIG. 1 is the normal temperature circulations of the lithium ion battery water system gluing diaphragm proposed in the embodiment of the present invention 3
Curve graph.
In the following, technical scheme of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, PVP is disperseed to obtain aqueous dispersion in powder aqueous solution using sand mill；
S2, by aqueous dispersion and vinyl cyanide binder with weight ratio for 4:100 close slurry 1.5h, and obtaining solid content is
4%, viscosity is the liquid phase mixture of 100mPaS；
S3, liquid phase mixture rotary spraying on the PP films of 9mm, in 40 DEG C of dryings, is obtained into coated face density in thickness
For 1.2g/m2Lithium ion battery water system gluing diaphragm；Wherein, technological parameter is as follows during rotary spraying：Rotating
For 1000r/min, the vertical range of nozzle and basement membrane is 10cm, feed rate 50mL/min, coating speed 80m/min.
Embodiment 2
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, PVP and ammonium polyacrylate salt are used to sand mill dispersion and double-planet high speed point successively in powder aqueous solution
It dissipates and obtains aqueous dispersion；
S2, by aqueous dispersion and esters of acrylic acid binder with weight ratio for 3.5:100 close slurry 2h, and obtaining solid content is
9%, viscosity is the liquid phase mixture of 170mPaS；
S3, liquid phase mixture rotary spraying on the basement membrane of 15mm, in 60 DEG C of dryings, is obtained into coated face density in thickness
For 2.0g/m2Lithium ion battery water system gluing diaphragm；Wherein, technological parameter is as follows during rotary spraying：Rotating
For 12000r/min, the vertical range of nozzle and basement membrane is 15cm, feed rate 1000mL/min, coating speed 20m/
min；Basement membrane is the composite membrane that PE films and PP films form, and PE monofilm thickness is 10 μm.
Embodiment 3
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, CMC is obtained into aqueous dispersion in powder aqueous solution using double-planet high speed dispersion；
S2, by aqueous dispersion and esters of acrylic acid binder/vinyl cyanide binder with weight ratio for 6.5:100 is mixed
It closes, obtains the liquid phase mixture that solid content is 12.5%, viscosity is 650mPaS；
S3, liquid phase mixture rotary spraying on the basement membrane of 12mm, in 52 DEG C of dryings, is obtained into coated face density in thickness
For 2.0g/m2Lithium ion battery water system gluing diaphragm；Wherein, technological parameter is as follows during rotary spraying：Rotating
For 1200r/min, the vertical range of nozzle and basement membrane is 13cm, feed rate 450mL/min, coating speed 30m/min；
Basement membrane is PE films, and monofilm thickness is 12 μm in PE films.
Embodiment 4
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, PVP, CMC and ammonium polyacrylate salt are placed in powder aqueous solution, disperse to obtain water system dispersion using sand mill
Liquid；
S2, by aqueous dispersion and esters of acrylic acid binder with weight ratio for 10:100 close slurry 2.5h, obtain solid content
The liquid phase mixture for being 1500mPaS for 20%, viscosity；
S3, liquid phase mixture rotary spraying on the basement membrane of 20mm, in 65 DEG C of dryings, is obtained into coated face density in thickness
For 1.5g/m2Lithium ion battery water system gluing diaphragm；Wherein, technological parameter is as follows during rotary spraying：Rotating
For 1200r/min, the vertical range of nozzle and basement membrane is 13cm, feed rate 350mL/min, coating speed 30m/min；
Basement membrane is PE films, and monofilm thickness is 12 μm in PE films.
Embodiment 5
A kind of preparation method of lithium ion battery water system gluing diaphragm proposed by the present invention, includes the following steps：
S1, PVP is obtained into aqueous dispersion in powder aqueous solution using double-planet high speed dispersion；
S2, by aqueous dispersion and esters of acrylic acid binder with weight ratio for 7.5:100 mixing, obtaining solid content is
14.5%, viscosity is the liquid phase mixture of 1055mPaS；
S3, liquid phase mixture rotary spraying on the basement membrane of 10mm, in 46 DEG C of dryings, is obtained into coated face density in thickness
For 1.2g/m2Lithium ion battery water system gluing diaphragm；Wherein, technological parameter is as follows during rotary spraying：Rotating
For 1200r/min, the vertical range of nozzle and basement membrane is 13cm, feed rate 300mL/min, coating speed 30m/min；
Basement membrane is PE films, and monofilm thickness is 12 μm in PE films.
Using the diaphragm of traditional coating method coating as control group, with lithium ion battery obtained in 3-5 of the embodiment of the present invention
Water system gluing diaphragm is experimental group, and negative as lithium ion battery as anode material for lithium-ion batteries, graphite using NCM622
Pole material carries out electric performance test, as a result such as following table to the lithium ion battery in control group and experimental group：
As can be seen from the above table, the lithium ion battery water system gluing diaphragm that prepared by the present invention is than traditional gluing diaphragm phase
Than having smaller DCR, smaller ventilative value, the constant current ratio of bigger.
The lithium ion battery water system gluing diaphragm that the present invention is prepared as can be seen from Figure 1 again is used for lithium ion battery
Afterwards, cycle performance of lithium ion battery is good, compared with the diaphragm that other coating methods (being traditional coating method) obtain, lithium ion
Cycle performance of battery has greatly improved.
To sum up, a kind of lithium ion battery water system gluing diaphragm proposed by the present invention, electric property is excellent, cycle performance
It is good, it is suitble to use of large-scale production.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of lithium ion battery water system gluing diaphragm, which is characterized in that include the following steps：
S1, dispersant is disperseed in powder aqueous solution to obtain aqueous dispersion；
S2, aqueous dispersion and binder are mixed to get liquid phase mixture；
S3, by liquid phase mixture rotary spraying on basement membrane, it is dry, obtain lithium ion battery water system gluing diaphragm.
2. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S1, dispersion
Agent is made of PVP and/or ionic surfactant；Preferably, ionic surfactant is CMC and/or ammonium polyacrylate
Salt.
3. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S1, dispersion
For sand mill dispersion and/or double-planet high speed dispersion.
4. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S2, bond
Agent is esters of acrylic acid binder or vinyl cyanide binder, and the weight ratio between binder and aqueous dispersion is 3-10:
100。
5. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S2, liquid phase
In mixture solid content be 4%-20%, viscosity 100-1500mPaS.
6. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S3, rotation
Technological parameter is as follows in spraying process：Rotating is 1000-12000r/min, and the vertical range of nozzle and basement membrane is 10-
15cm, feed rate 50-1000mL/min, coating speed 20-80m/min.
7. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that dry in S3
Temperature is 40-65 DEG C.
8. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S3, basement membrane
Thickness be 9-20mm, basement membrane be PE films and/or PP films.
9. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that PE films are single layer
Or multilayer film, PP are single-layer or multi-layer film；Preferably, PE monofilm thickness is 10-15 μm.
10. the preparation method of lithium ion battery water system gluing diaphragm according to claim 1, which is characterized in that in S3, lithium from
The coated face density of sub- battery water system gluing diaphragm is 1.2-2.0g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340877.5A CN108321338A (en) | 2017-12-14 | 2017-12-14 | A kind of preparation method of lithium ion battery water system gluing diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340877.5A CN108321338A (en) | 2017-12-14 | 2017-12-14 | A kind of preparation method of lithium ion battery water system gluing diaphragm |
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| Publication Number | Publication Date |
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| CN108321338A true CN108321338A (en) | 2018-07-24 |
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|---|---|---|---|
| CN201711340877.5A Pending CN108321338A (en) | 2017-12-14 | 2017-12-14 | A kind of preparation method of lithium ion battery water system gluing diaphragm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525074A (en) * | 2020-03-25 | 2020-08-11 | 河北金力新能源科技股份有限公司 | PTFE-PVDF (polytetrafluoroethylene-polyvinylidene fluoride) blended and sprayed lithium battery diaphragm and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105552284A (en) * | 2015-12-22 | 2016-05-04 | 沧州明珠隔膜科技有限公司 | Composite coating lithium-ion battery separator and preparation method thereof |
| CN105742719A (en) * | 2016-03-31 | 2016-07-06 | 成都国珈星际固态锂电科技有限公司 | Spraying equipment and preparation method for polymer lithium ion battery by adopting same |
| CN106391344A (en) * | 2016-12-01 | 2017-02-15 | 无锡溥汇机械科技有限公司 | Spraying turntable of lithium battery diaphragm spraying machine |
-
2017
- 2017-12-14 CN CN201711340877.5A patent/CN108321338A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105552284A (en) * | 2015-12-22 | 2016-05-04 | 沧州明珠隔膜科技有限公司 | Composite coating lithium-ion battery separator and preparation method thereof |
| CN105742719A (en) * | 2016-03-31 | 2016-07-06 | 成都国珈星际固态锂电科技有限公司 | Spraying equipment and preparation method for polymer lithium ion battery by adopting same |
| CN106391344A (en) * | 2016-12-01 | 2017-02-15 | 无锡溥汇机械科技有限公司 | Spraying turntable of lithium battery diaphragm spraying machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525074A (en) * | 2020-03-25 | 2020-08-11 | 河北金力新能源科技股份有限公司 | PTFE-PVDF (polytetrafluoroethylene-polyvinylidene fluoride) blended and sprayed lithium battery diaphragm and preparation method thereof |
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Application publication date: 20180724 |