CN105845874A - Preparation method for diaphragm used for lithium ion battery - Google Patents
Preparation method for diaphragm used for lithium ion battery Download PDFInfo
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- CN105845874A CN105845874A CN201610363502.XA CN201610363502A CN105845874A CN 105845874 A CN105845874 A CN 105845874A CN 201610363502 A CN201610363502 A CN 201610363502A CN 105845874 A CN105845874 A CN 105845874A
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- Prior art keywords
- lithium ion
- ion battery
- preparation
- diaphragm
- parts
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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
- H01M50/409—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
- H01M50/44—Fibrous material
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Cell Separators (AREA)
- Primary Cells (AREA)
Abstract
The invention discloses a preparation method for a diaphragm used for a lithium ion battery. The preparation method comprises the following steps of uniformly stirring polyethylene, polycarbonate, maleic anhydride resins, hydroxyethyl methylacrylate, titanium dioxide, polylactic acid, polycyclolactone and plasticizers to obtain a material A, transferring into a reaction kettle, discharging to obtain a material B after heating and stirring reaction, and carrying out film extrusion in a double-screw extruder to obtain a substrate film; adding hydroxypropyl methylcellulose, polyethylene glycol, white carbon black and zirconium oxide into a solvent and uniformly mixing to obtain mixed liquor; and lastly, immersing the substrate film into the mixed liquor, taking out after heating for a period of time, heating and drying in an air dry oven and naturally cooling to the room temperature to obtain the diaphragm used for the lithium ion battery. The diaphragm used for the lithium ion battery, which is prepared by the method of the invention, has good mechanical property and electrical property and can be widely applied in the lithium ion battery to meet the higher usage requirement.
Description
Technical field
The invention belongs to field of lithium ion battery, be specifically related to the preparation method of a kind of diaphragm for lithium ion battery.
Background technology
In lithium ion battery, the effect of barrier film mainly has two aspects: on the one hand plays separation positive and negative electrode, prevents short
The effect on road；On the other hand, barrier film can allow lithium ion pass through, and forms charging and discharging circuit.The quality of membrane properties directly affects
The internal resistance of cell, discharge capacity, service life cycle and security performance.Barrier film is the thinnest, and porosity is the highest, and the internal resistance of cell is more
Little, high-rate discharge ability is the best, and the barrier film of excellent performance has important effect to the combination property improving battery.
The lithium ion battery requirement to barrier film.1. there is electronic isolation, it is ensured that the mechanical isolation of both positive and negative polarity；2. have one
Fixed aperture and porosity, it is ensured that low resistance and high ionic conductivity, have good permeability to lithium ion；The most resistance to electricity
Solving corrosion, electrochemical stability is good；4. the wellability of pair electrolyte is got well and has enough imbibition moisture-retaining capacity；4. have
Enough mechanical properties, including puncture strength, hot strength etc.；5. spatial stability and planarization are good；6. heat stability and
Automatically shut down protective value good.
Lithium ion battery is polyolefine material to the matrix material that barrier film uses, and it has the mechanical property of excellence, chemistry
Stability and relatively inexpensive feature.Diaphragm matrix material mainly includes polypropylene, polythene material and additive.Barrier film is adopted
Have with the matrix material wettability to barrier film mechanical property and with electrolyte and directly contact.Although having research in recent years with poly-
Lithium ion battery separator prepared by the material such as vinylidene, cellulose composite membrane, but the battery diaphragm material of commercialization so far is still led
Polyethylene to be used, microporous polypropylene membrane.There is mechanical strength raising difficulty in existing barrier film, electric property can not meet use
The situation required, it is therefore desirable to a kind of barrier film of exploitation, it is possible to meet, on the basis of ensureing excellent mechanical properties, the electrical property used
Can requirement.
Summary of the invention
It is an object of the invention to provide a kind of diaphragm for lithium ion battery to overcome above the deficiencies in the prior art
Preparation method, promote the mechanical performance of barrier film and electric property.
Technical scheme is as follows:
The preparation method of a kind of diaphragm for lithium ion battery, comprises the following steps:
Step one, takes polyethylene 40-50 part in parts by weight, Merlon 3-7 part, maleic resin 2-5 part, first
Base 2-(Acryloyloxy)ethanol 5-8 part, titanium dioxide 5-10 part, polylactic acid 1-2 part, polycyclic lactone 1-3 part and plasticizer 3-5 part, in
Mixing and blending machine is uniformly mixed, obtains material one；
Step 2, proceeds in reactor by material one, stirs 60-90 minute, discharging, obtain material two under the conditions of 50-60 DEG C；
Step 3, carries out material two film extrusion in double screw extruder, obtains base film；
Step 4, by hypromellose 3-5 part in parts by weight, Polyethylene Glycol 1-2 part, white carbon 10-15 part and oxidation
Zirconium 8-12 part, joins in 80-90 part solvent, and mix homogeneously obtains mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 70-80 DEG C, keeps 30-40
Minute, thin film is taken out, then in air dry oven, is warming up to 100-110 DEG C, keeps 90-120 minute, naturally cool to room
Temperature, obtains diaphragm for lithium ion battery.
The preparation method of described diaphragm for lithium ion battery, in step one, plasticizer is Methanamide.
The preparation method of described diaphragm for lithium ion battery, the rotating speed stirring mixing in step one is 120-150 rev/min
Clock, mixing time 15-20 minute.
The preparation method of described diaphragm for lithium ion battery, in step 2, the speed of stirring is 80-100 rev/min.
The preparation method of described diaphragm for lithium ion battery, in step 3, the extrusion temperature of film extrusion is 180-200
℃。
The preparation method of described diaphragm for lithium ion battery, the solvent in step 4 is N,N-DMAA.
The preparation method of described diaphragm for lithium ion battery, in step 4, Polyethylene Glycol is Macrogol 600.
The diaphragm for lithium ion battery that the method that the present invention provides prepares has good mechanical performance and electrical property
Can, it is possible to be widely used in lithium ion battery meeting higher use requirement.
Detailed description of the invention:
Embodiment 1
The preparation method of a kind of diaphragm for lithium ion battery, comprises the following steps:
Step one, takes polyethylene 40 parts in parts by weight, Merlon 3 parts, maleic resin 2 parts, metering system
Acid hydroxyl ethyl ester 5 parts, titanium dioxide 5 parts, polylactic acid 1 part, polycyclic lactone 1 part and Methanamide 3 parts, in mixing and blending machine, stirring is mixed
Closing uniformly, the rotating speed of stirring mixing is 120 revs/min, and mixing time 15 minutes obtains material one；
Step 2, proceeds in reactor by material one, stirs 60 minutes under the conditions of 50 DEG C, and the speed of stirring is 80 revs/min,
Discharging, obtains material two；
Step 3, carries out film extrusion in double screw extruder by material two, and extrusion temperature is 180-200 DEG C, obtains base material
Thin film；
Step 4, by hypromellose 3 parts in parts by weight, Macrogol 600 1 part, white carbon 10 parts and zirconium oxide 8
Part, join in 80 parts of N,N-DMAAs, mix homogeneously, obtain mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 70 DEG C, keeps 30 minutes,
Thin film is taken out, in air dry oven, is then warming up to 100 DEG C, keeps 90 minutes, naturally cool to room temperature, obtain lithium ion
Battery separator.
Embodiment 2
The preparation method of a kind of diaphragm for lithium ion battery, comprises the following steps:
Step one, takes polyethylene 42 parts in parts by weight, Merlon 4 parts, maleic resin 3 parts, metering system
Acid hydroxyl ethyl ester 6 parts, titanium dioxide 7 parts, polylactic acid 1 part, polycyclic lactone 2 parts and Methanamide 4 parts, in mixing and blending machine, stirring is mixed
Closing uniformly, the rotating speed of stirring mixing is 130 revs/min, and mixing time 16 minutes obtains material one；
Step 2, proceeds in reactor by material one, stirs 70 minutes under the conditions of 55 DEG C, and the speed of stirring is 85 revs/min,
Discharging, obtains material two；
Step 3, carries out film extrusion in double screw extruder by material two, and extrusion temperature is 180-200 DEG C, obtains base material
Thin film；
Step 4, by hypromellose 4 parts in parts by weight, Macrogol 600 2 parts, white carbon 12 parts and zirconium oxide 10
Part, join in 85 parts of N,N-DMAAs, mix homogeneously, obtain mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 73 DEG C, keeps 35 minutes,
Thin film is taken out, in air dry oven, is then warming up to 105 DEG C, keeps 96 minutes, naturally cool to room temperature, obtain lithium ion
Battery separator.
Embodiment 3
The preparation method of a kind of diaphragm for lithium ion battery, comprises the following steps:
Step one, takes polyethylene 48 parts in parts by weight, Merlon 5 parts, maleic resin 4 parts, metering system
Acid hydroxyl ethyl ester 7 parts, titanium dioxide 8 parts, polylactic acid 2 parts, polycyclic lactone 3 parts and Methanamide 4 parts, in mixing and blending machine, stirring is mixed
Closing uniformly, the rotating speed of stirring mixing is 150 revs/min, and mixing time 18 minutes obtains material one；
Step 2, proceeds in reactor by material one, stirs 85 minutes under the conditions of 58 DEG C, and the speed of stirring is 100 revs/min
Clock, discharging, obtain material two；
Step 3, carries out film extrusion in double screw extruder by material two, and extrusion temperature is 180-200 DEG C, obtains base material
Thin film；
Step 4, by hypromellose 4 parts in parts by weight, Macrogol 600 2 parts, white carbon 13 parts and zirconium oxide 11
Part, join in 90 parts of N,N-DMAAs, mix homogeneously, obtain mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 78 DEG C, keeps 40 minutes,
By thin film take out, in air dry oven, be then warming up to 110 DEG C, keep 110 minutes, naturally cool to room temperature, obtain lithium from
Sub-battery separator.
Embodiment 4
The preparation method of a kind of diaphragm for lithium ion battery, comprises the following steps:
Step one, takes polyethylene 50 parts in parts by weight, Merlon 7 parts, maleic resin 5 parts, metering system
Acid hydroxyl ethyl ester 8 parts, titanium dioxide 10 parts, polylactic acid 2 parts, polycyclic lactone 3 parts and Methanamide 5 parts, stir in mixing and blending machine
Mix homogeneously, the rotating speed of stirring mixing is 150 revs/min, and mixing time 20 minutes obtains material one；
Step 2, proceeds in reactor by material one, stirs 90 minutes under the conditions of 60 DEG C, and the speed of stirring is 100 revs/min
Clock, discharging, obtain material two；
Step 3, carries out film extrusion in double screw extruder by material two, and extrusion temperature is 200 DEG C, obtains base film；
Step 4, by hypromellose 5 parts in parts by weight, Macrogol 600 2 parts, white carbon 15 parts and zirconium oxide 12
Part, join in 90 parts of N,N-DMAAs, mix homogeneously, obtain mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 80 DEG C, keeps 40 minutes,
By thin film take out, in air dry oven, be then warming up to 110 DEG C, keep 120 minutes, naturally cool to room temperature, obtain lithium from
Sub-battery separator.
The diaphragm for lithium ion battery preparing above example carries out performance test, and result is as follows:
As can be seen from the above results, the diaphragm for lithium ion battery that the method that the present invention provides prepares has good machine
Tool performance and electric property, it is possible to be widely used in lithium ion battery meeting higher use requirement.
Claims (7)
1. the preparation method of a diaphragm for lithium ion battery, it is characterised in that comprise the following steps:
Step one, takes polyethylene 40-50 part in parts by weight, Merlon 3-7 part, maleic resin 2-5 part, first
Base 2-(Acryloyloxy)ethanol 5-8 part, titanium dioxide 5-10 part, polylactic acid 1-2 part, polycyclic lactone 1-3 part and plasticizer 3-5 part, in
Mixing and blending machine is uniformly mixed, obtains material one；
Step 2, proceeds in reactor by material one, stirs 60-90 minute, discharging, obtain material two under the conditions of 50-60 DEG C；
Step 3, carries out material two film extrusion in double screw extruder, obtains base film；
Step 4, by hypromellose 3-5 part in parts by weight, Polyethylene Glycol 1-2 part, white carbon 10-15 part and oxidation
Zirconium 8-12 part, joins in 80-90 part solvent, and mix homogeneously obtains mixed liquor；
Step 5, base film step 3 obtained immerses in the mixed liquor of step 4, is heated to 70-80 DEG C, keeps 30-40
Minute, thin film is taken out, then in air dry oven, is warming up to 100-110 DEG C, keeps 90-120 minute, naturally cool to room
Temperature, obtains diaphragm for lithium ion battery.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that plasticizer in step one
For Methanamide.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that in step one, stirring is mixed
The rotating speed closed is 120-150 rev/min, mixing time 15-20 minute.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that stirring in step 2
Speed is 80-100 rev/min.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that be extruded in step 3
The extrusion temperature of film is 180-200 DEG C.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that the solvent in step 4
For N, N-DMAA.
The preparation method of diaphragm for lithium ion battery the most according to claim 1, it is characterised in that poly-second two in step 4
Alcohol is Macrogol 600.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363502.XA CN105845874A (en) | 2016-05-26 | 2016-05-26 | Preparation method for diaphragm used for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363502.XA CN105845874A (en) | 2016-05-26 | 2016-05-26 | Preparation method for diaphragm used for lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN105845874A true CN105845874A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610363502.XA Pending CN105845874A (en) | 2016-05-26 | 2016-05-26 | Preparation method for diaphragm used for lithium ion battery |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271965A (en) * | 2008-04-30 | 2008-09-24 | 中南大学 | Lithium ion battery septum and method for producing the same |
| CN103730619A (en) * | 2013-11-26 | 2014-04-16 | 沃太能源南通有限公司 | Preparation method of high-strength membrane for lithium ion battery |
| CN104300104A (en) * | 2014-09-28 | 2015-01-21 | 苏州长盛机电有限公司 | Preparation method of low-conductivity diaphragm for lithium-ion battery |
| CN105355817A (en) * | 2015-12-14 | 2016-02-24 | 苏州锂盾储能材料技术有限公司 | Preparation method of novel diaphragm material for lithium ion battery |
-
2016
- 2016-05-26 CN CN201610363502.XA patent/CN105845874A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271965A (en) * | 2008-04-30 | 2008-09-24 | 中南大学 | Lithium ion battery septum and method for producing the same |
| CN103730619A (en) * | 2013-11-26 | 2014-04-16 | 沃太能源南通有限公司 | Preparation method of high-strength membrane for lithium ion battery |
| CN104300104A (en) * | 2014-09-28 | 2015-01-21 | 苏州长盛机电有限公司 | Preparation method of low-conductivity diaphragm for lithium-ion battery |
| CN105355817A (en) * | 2015-12-14 | 2016-02-24 | 苏州锂盾储能材料技术有限公司 | Preparation method of novel diaphragm material for lithium ion battery |
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Application publication date: 20160810 |
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