CN108666510A - A kind of lithium battery diaphragm paper and its manufacturing method - Google Patents
A kind of lithium battery diaphragm paper and its manufacturing method Download PDFInfo
- Publication number
- CN108666510A CN108666510A CN201810544299.5A CN201810544299A CN108666510A CN 108666510 A CN108666510 A CN 108666510A CN 201810544299 A CN201810544299 A CN 201810544299A CN 108666510 A CN108666510 A CN 108666510A
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- Prior art keywords
- lithium battery
- diaphragm paper
- paper
- fiber
- battery diaphragm
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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
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Cell Separators (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of lithium battery diaphragm paper and its manufacturing methods, the diaphragm paper through polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre carry out wet papermaking be made, the polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre consumption proportion be 1 ~ 3:1~3:1, copy paper coolant-temperature gage is 80 DEG C ~ 100 DEG C.The production method of diaphragm paper of the present invention uses wet papermaking process, the technique can make polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre twine connect uniformly, the one-tenth porosity, heat resistance and puncture strength of diaphragm paper can be promoted, solve diaphragm paper poor heat resistance in the prior art, the weak problem of puncture strength.
Description
Technical field
The present invention relates to cell manufacturing techniques fields, and in particular to a kind of lithium battery diaphragm paper and its manufacturing method.
Background technology
In the structure of lithium battery, diaphragm is one of the interior layer assembly of key.The performance of diaphragm determines the interface knot of battery
Structure, internal resistance etc. directly affect the characteristics such as capacity, cycle and the security performance of battery, and the diaphragm haveing excellent performance is to improving battery
Comprehensive performance play an important role.The main function of diaphragm is that the positive and negative electrode of battery is made to separate, and prevents the two poles of the earth from contacting
And it is short-circuit, additionally have the function of electrolyte ion capable of being made to pass through.Diaphragm material is nonconducting, physicochemical properties pair
The performance of battery has a great impact.
Since the electrolyte of lithium battery is organic solvent system, thus the diaphragm material of organic solvent-resistant is needed, generally adopted
With the polyolefin porous membrane of high-strength thin-film.And existing polyolefin porous membrane mainly uses the technique system that high-temperature fusion stretches
At, but diaphragm paper lack of homogeneity prepared by this method, porosity is low, and the permeability of electrolyte ion is poor, and resistance is larger, nothing
Method meets the charge-discharge performance of lithium battery, while heat resisting temperature is low during its use, once its excessively high puncture strength of temperature and
Toughness can all substantially reduce.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of lithium battery diaphragm and its manufacturer are provided
Method promotes the porosity of polyolefin porous membrane, puncture strength and heat-resisting so as to improve the uniformity of existing polyolefin porous membrane
Temperature.
The technical solution adopted by the present invention is as follows：
A kind of lithium battery diaphragm paper of the present invention, the diaphragm paper is through polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre
Carry out wet papermaking be made, the polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre consumption proportion be 1 ~ 3:1~3:
1, copy paper coolant-temperature gage is 80 DEG C ~ 100 DEG C.
The fusing point of polypropylene melt-blown fiber is 170 DEG C or so, and polyethylene fibre fusing point is 130 DEG C or so, and the two fusing point is all
Relatively low, when copy paper coolant-temperature gage reaches 80 DEG C ~ 100 DEG C, polyethylene fibre can soften, and be more advantageous to and polypropylene melt-blown fibre
Dimension is mutually twined with ceramic fibre and is connect, and the binding force between three kinds of fibers enhances, and is conducive to the molding of diaphragm paper, can also be promoted every
The one-tenth porosity of film paper.Meanwhile ceramic fibre intensity is high, good insulating, heat resistance is strong, Ceramics fiber can integrally be promoted every
The heat resistance and puncture strength of film paper also avoid ceramic powders and are adversely affected to the one-tenth porosity of diaphragm paper.
Further, lithium battery diaphragm paper of the invention, the polypropylene melt-blown fibre length are 2mm ~ 6mm, and fiber number is
0.1~0.2detx；The polyethylene fibre length is 2mm ~ 6mm, and fiber number is 0.1 ~ 0.2detx；The ceramic fibre length is
1mm ~ 3mm, fibre diameter are 2 ~ 4um.
The manufacturing method of the lithium battery diaphragm paper of the present invention, includes the following steps：
Step 1, the preparation of raw material：The length for choosing polypropylene melt-blown fiber and polyethylene fibre is 2mm ~ 6mm, ceramic fibre
Length be 1mm ~ 3mm, weigh polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre consumption proportion be 1 ~ 3:1~3:1；
Step 2, raw material are discongested：Three kinds of fibers are stirred in water, 0.5% ~ 1% fibre of fibrous raw material quality is added
Dispersant is tieed up, fluffer is placed into and is discongested；
Step 3, raw material copy paper：The fibrous raw material discongested is poured into paper machine container and carries out copy paper, fibrous raw material diluted concentration
It is 0.1% ~ 0.2%, antiaging agent is added, the coolant-temperature gage of control dilution at this time is 80 DEG C ~ 100 DEG C, stands 60s ~ 90s, is stirred for 30s
~60s。
Step 4, wet end dehydration forming, control water flow velocity be 5 ~ 10cm/s, then squeezed, dry and press polish processing, cut
Lithium battery diaphragm paper is obtained after cutting.
Septation paper of the present invention is carried out using wet papermaking process, can make polypropylene melt-blown fiber, polyethylene fiber peacekeeping
Ceramic fibre mixing is more uniformly distributed, and the one-tenth porosity higher of diaphragm paper.
In step 1, while choosing the smaller fibrous raw material of fiber number can enable the diaphragm paper produced keep originality
Thinner, the fibre length of selection makes fibrous raw material mutually twine to connect and be unlikely to knot, make pottery in fibrous raw material consumption proportion just
The dosage of porcelain fiber keeps it that can promote diaphragm paper heat resistance just, and can suitably promote its pore-forming probability；
In step 2, fibrous raw material discongest process be added dispersing agent for fibre can avoid knotting between fiber；
In step 3, since polypropylene melt-blown fiber and polyethylene fibre are easy aging, it is added in paper-making process anti-old
Agent prevents its aging, and coolant-temperature gage is diluted in paper-making process and is adjusted to after 80 DEG C ~ 100 DEG C, then is stood, polyethylene fibre energy
Enough softenings completely, polypropylene melt-blown fiber suitably softens, then is stirred, and at this moment fibrous raw material just can be twined mutually and be connect, polypropylene
Ceramic fibre uniform winding can be kept diaphragm paper uniform, heat resistance and strength enhancing by meltblown fibers, polyethylene fibre；
In step 4, the molding water flow velocity of wet end controls the uniform of the fibrous raw material in 5 ~ 10cm/s good can keep water
Property, to obtain uniform diaphragm paper, flow is too fast or is all unfavorable for the molding of diaphragm paper slowly excessively.
Further, the temperature of the press polish processing is 100 DEG C ~ 300 DEG C, and pressure is 1 ~ 3Mpa.
Further, quantification of 20 ~ 30g/m of the lithium battery diaphragm2。
Further, the thickness of the lithium battery diaphragm paper is 10 ~ 20um.
Further, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1, the present invention chooses ceramic fibre and polypropylene melt-blown fiber, polyethylene fibre interaction, due to more having between fiber
It is connect conducive to twining, therefore ceramic fibre can be uniformly distributed in diaphragm paper, keeps diaphragm paper heat resistance and puncture strength more preferable, together
When, the one-tenth porosity for connecing and capable of promoting diaphragm paper is mutually twined between fiber.
2, when copy paper coolant-temperature gage reaches 80 DEG C ~ 100 DEG C, polyethylene fibre can soften, and be more advantageous to and polypropylene melt-blown
Fiber is mutually twined with ceramic fibre and is connect, and the binding force enhancing between three kinds of fibrous raw materials is conducive to the molding of paper.
3, the uniformity of fibrous raw material of the molding water flow velocity control of wet end in 5 ~ 10cm/s good can keep water,
To obtain uniform diaphragm paper, flow is too fast or is all unfavorable for the molding of diaphragm paper slowly excessively.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The manufacturing method of the lithium battery diaphragm paper of the present invention, includes the following steps：
Step 1, the preparation of raw material：The length for choosing polypropylene melt-blown fiber and polyethylene fibre is 6mm, the length of ceramic fibre
Degree is 3mm, weighs polypropylene melt-blown fiber, the consumption proportion of polyethylene fiber peacekeeping ceramic fibre is 3: 3:1, determine lithium battery
The quantification of 30g/m of diaphragm2。
Step 2, raw material are discongested：Three kinds of fibers are stirred in water, 1% fiber of fibrous raw material quality is added
Dispersant places into fluffer and is discongested；
Step 3, raw material copy paper：The fibrous raw material discongested is poured into paper machine container and carries out copy paper, fibrous raw material diluted concentration
It is 0.1%, antiaging agent 0.2% is added, the coolant-temperature gage of control dilution at this time is 100 DEG C, stands 60s, is stirred for 30s.
Step 4, wet end dehydration forming, control water flow velocity be 5cm/s, then squeezed, dry and press polish processing, press polish
The temperature of processing is 300 DEG C, pressure 3Mpa, then lithium battery diaphragm paper is obtained after cutting, thickness 10um.
Embodiment 2
The manufacturing method of the lithium battery diaphragm paper of the present invention, includes the following steps：
Step 1, the preparation of raw material：The length for choosing polypropylene melt-blown fiber and polyethylene fibre is 2mm, the length of ceramic fibre
Degree is 1mm, weighs polypropylene melt-blown fiber, the consumption proportion of polyethylene fiber peacekeeping ceramic fibre is 1:1:1, determine lithium battery every
The quantification of 20g/m of film2。
Step 2, raw material are discongested：Three kinds of fibers are stirred in water, 0.5% fibre of fibrous raw material quality is added
Dispersant is tieed up, fluffer is placed into and is discongested；
Step 3, raw material copy paper：The fibrous raw material discongested is poured into paper machine container and carries out copy paper, fibrous raw material diluted concentration
It is 0.2%, antiaging agent 0.1% is added, the coolant-temperature gage of control dilution at this time is 80 DEG C, stands 90s, is stirred for 60s.
Step 4, wet end dehydration forming, control water flow velocity be 5 ~ 10cm/s, then squeezed, dry and press polish processing, pressure
The temperature of light processing is 100 DEG C, pressure 1Mpa, then lithium battery diaphragm paper is obtained after cutting, thickness 20um.
Claims (6)
1. a kind of lithium battery diaphragm paper, which is characterized in that the diaphragm paper is through polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramics
Fiber carry out wet papermaking be made, the polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre consumption proportion be 1 ~ 3:1
~3:1, copy paper coolant-temperature gage is 80 DEG C ~ 100 DEG C.
2. lithium battery diaphragm paper according to claim 1, which is characterized in that the polypropylene melt-blown fibre length be 2mm ~
6mm, fiber number are 0.1 ~ 0.2detx；The polyethylene fibre length is 2mm ~ 6mm, and fiber number is 0.1 ~ 0.2detx；The ceramics
Fibre length is 1mm ~ 3mm, and fibre diameter is 2 ~ 4um.
3. a kind of manufacturing method of lithium battery diaphragm paper described in claim 1, which is characterized in that include the following steps：
Step 1, the preparation of raw material：The length for choosing polypropylene melt-blown fiber and polyethylene fibre is 2mm ~ 6mm, ceramic fibre
Length be 1mm ~ 3mm, weigh polypropylene melt-blown fiber, polyethylene fiber peacekeeping ceramic fibre consumption proportion be 1 ~ 3:1~3:1；
Step 2, raw material are discongested：Three kinds of fibers are stirred in water, 0.5% ~ 1% fibre of fibrous raw material quality is added
Dispersant is tieed up, fluffer is placed into and is discongested；
Step 3, raw material copy paper：The fibrous raw material discongested is poured into paper machine container and carries out copy paper, fibrous raw material diluted concentration
It is 0.1% ~ 0.2%, aging agent is put in addition, and the coolant-temperature gage of control dilution at this time is 80 DEG C ~ 100 DEG C, stands 60s ~ 90s, is stirred for 30s
~60s；
Step 4, wet end dehydration forming, control water flow velocity be 5 ~ 10cm/s, then squeezed, dry and press polish processing, after cutting
Obtain lithium battery diaphragm paper.
4. the manufacturing method of lithium battery diaphragm paper according to claim 3, which is characterized in that the temperature of the press polish processing
It it is 100 DEG C ~ 300 DEG C, pressure is 1 ~ 3Mpa.
5. the manufacturing method of lithium battery diaphragm paper according to claim 3, which is characterized in that the lithium battery diaphragm is determined
Amount is 20 ~ 30g/m2。
6. the manufacturing method of lithium battery diaphragm paper according to claim 3, which is characterized in that the lithium battery diaphragm paper
Thickness is 10 ~ 20um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544299.5A CN108666510A (en) | 2018-05-31 | 2018-05-31 | A kind of lithium battery diaphragm paper and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544299.5A CN108666510A (en) | 2018-05-31 | 2018-05-31 | A kind of lithium battery diaphragm paper and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108666510A true CN108666510A (en) | 2018-10-16 |
Family
ID=63774765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810544299.5A Withdrawn CN108666510A (en) | 2018-05-31 | 2018-05-31 | A kind of lithium battery diaphragm paper and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108666510A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265609A (en) * | 2019-07-18 | 2019-09-20 | 河南曼博睿新材料科技有限公司 | A kind of battery separator with fast charge function |
| GB2598536A (en) * | 2020-05-14 | 2022-03-09 | Thermal Ceram Inc | Fire retardant paper for use in energy storage devices |
-
2018
- 2018-05-31 CN CN201810544299.5A patent/CN108666510A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265609A (en) * | 2019-07-18 | 2019-09-20 | 河南曼博睿新材料科技有限公司 | A kind of battery separator with fast charge function |
| GB2598536A (en) * | 2020-05-14 | 2022-03-09 | Thermal Ceram Inc | Fire retardant paper for use in energy storage devices |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181016 |