CN106299219A - A kind of lithium ion battery blowout disk and preparation method thereof - Google Patents
A kind of lithium ion battery blowout disk and preparation method thereof Download PDFInfo
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- CN106299219A CN106299219A CN201610725552.8A CN201610725552A CN106299219A CN 106299219 A CN106299219 A CN 106299219A CN 201610725552 A CN201610725552 A CN 201610725552A CN 106299219 A CN106299219 A CN 106299219A
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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
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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
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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
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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
- H01M50/431—Inorganic material
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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
- H01M50/44—Fibrous material
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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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- 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
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of lithium ion battery blowout disk and preparation method thereof, this blowout disk is prepared by raw materials such as inorfil, cotton fiber, Kynoar, sodium carboxymethyl cellulose, dehydrated alcohol, polyethylene microsphere, Triethoxyvinylsilane and polyacrylamides, inorfil therein is the fiber with ptc characteristics, and this blowout disk prepared by polyethylene microsphere intermediate layer, strengthen coating prepares, strengthen the steps such as coating coating and barrier film hot setting prepares.Battery diaphragm in the present invention there is fiber as reinforcement, even being also less likely to occur significantly to shrink after by high temperature；With the addition of the multiple material with ptc characteristics, the migration of lithium ion battery electrolyte inside intermediate ion can be blocked in the case of a high temperature；Lithium ion battery separator preparation method advantages of simple, prepared barrier film layer structure, the film layer that middle polyethylene microsphere prepares plays a supportive role, and the fibrous layer in outside plays booster action.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, especially relate to a kind of lithium ion battery blowout disk and
Its preparation method.
Background technology
Have compared with the other kinds of batteries such as lithium ion battery and plumbic acid, cadmium nickel that specific capacity is big, running voltage is high, charging
Speed is fast, operating temperature range width, have extended cycle life, the advantage such as volume is little, lightweight, green non-pollution.At present, the most extensively should
For fields such as mobile phone, notebook computer, electric tools, and its range of application is more and more extensive, novel digital electronic
The fast development of product is to propose the highest requirement to the energy density of lithium ion battery and high reliability.
The barrier film of lithium ion battery is the important composition in the battery of lithium ion, and barrier film can effectively rise at inside battery
To ionic conduction and the effect of isolation electronics, it it is the barrier of protection battery safety.The lithium ion battery of at present commercialization every
Film mostly is the apertured polymeric film using polypropylene, polyethylene material to prepare, and macromolecular material has excellent pore-creating character, stretching
Characteristic and intensity are suitable for existing Product Process, but unfortunately macromolecular material at high temperature can occur in various degree
Shrink, as a example by traditional polypropylene, polyethylene material, in the case of temperature is more than 100 degrees Celsius, it may occur that the hottest
Contraction situation, will cause both positive and negative polarity active material directly to contact at inside battery, cause safety problem, simultaneously high molecule micropore
Film absorbent is poor, it is impossible to is maintained at the electrolyte that the life-cycle stage adsorption of battery is enough, causes cycle performance of battery poor,
In the case of this, occur in that again high temperature resistance diaphragm prepared by materials such as using fibrous nonwoven cloth, but this type of barrier film pore-creating be uneven,
Battery self discharge rate is high, and puncture strength is poor, and resistance to tensile strength is low, is easy under high tension bore deformation, and poor processability is same
Sample brings potential safety hazard, simultaneously because this kind of barrier film is under lithium battery overheat condition, still allows the ion in electrolyte to lead to
Cross, and owing to temperature raises, ion mobility is constantly accelerated, cause internal temperature of lithium ion battery to continue to raise, cause
The vicious cycle of inside lithium ion cell, eventually even can occur the severe safety accidents such as blast, jeopardizes the person peace of user
Complete or cause any property loss.
Summary of the invention
For solving the problems referred to above, the invention provides do not shrink under a kind of high temperature, barrier film inner duct is uniformly unlikely to deform, high
The lithium ion battery blowout disk of ion passing hole channel it is automatically switched off in the case of temperature；
Present invention also offers a kind of can mistake and obtain the lithium ion battery use do not shunk not deformation under high temperature, ion migration can be pressed down
The preparation method of blowout disk.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 50
～70 parts, Kynoar 15～25 parts, sodium carboxymethyl cellulose 10～15 parts, dehydrated alcohol 20～25 parts, polyethylene microsphere
60～70 parts, Triethoxyvinylsilane 3～4 parts, polyacrylamide 1～2 parts.
Traditional lithium ion battery separator is single polymer separators, and its heat easily shrinks, and causes losing efficacy, simultaneously
Absorbent is poor so that the performance of lithium ion battery is difficult to improve；The present invention adds appropriate cotton fiber and nothing in barrier film
Organic fiber, to strengthen every film strength, prevents it from obvious thermal contraction occurring when heat, simultaneously in order to ensure under normal temperature
The migration of electrolyte intermediate ion, uses polyethylene microsphere as the main body of barrier film, and during polyethylene microsphere sequentially stay aligned, it is micro-
Having space between ball, these spaces can ensure that ion migration at a normal temperature；Sodium carboxymethyl cellulose is as thickening agent
Making fiber be easier to molding after treatment, Triethoxyvinylsilane improves table when polyethylene microsphere processes as dispersant
Face activity.
As preferably, a length of 1～2 μm of cotton fiber.
As preferably, the particle diameter of polyethylene microsphere is 0.2～1 μm.
As preferably, inorfil is prepared by following steps: after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Add fused salt mixt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, pulverize and clear with water after calcining
It is dried after washing；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and carbon
9 times of acid barium weight, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The inorfil that the present invention uses is the bariumtitanatefiber of the Ca-Ti ore type synthesized by titanium dioxide and brium carbonate, should
A diameter of micro-nano of fiber, about 0.2～2 μm, length is about 10～20 μm, can pass through when needs specific dimensions
Screening obtains, diameter 0.5 μm in the present invention, and length 15 μm is most widely suited, and one is owing to the fiber synthetic ratio of this size is higher,
Two is that it can meet the effect strengthening barrier film intensity；Meanwhile, the barium-titanate material of Ca-Ti ore type or a kind of positive temperature coefficient
Material, i.e. after temperature is increased to Curie temperature, its resistance can be increased dramatically, and the distance temperature of the Barium metatitanate. of Ca-Ti ore type is 130
About DEG C, i.e. when temperature is increased to 130 DEG C, the resistance of Barium metatitanate. is for being increased dramatically, owing to perovskite barium titanate is by conduct
Inorfil adds in barrier film, and when internal temperature of lithium ion battery is increased to 130 DEG C, barrier film is to lithium-ion battery electrolytes
The obstructing capacity of intermediate ion becomes strong, until stoping ion migration completely, thus stops the continuation liter of internal temperature of lithium ion battery
Height, plays guarantee lithium ion battery temperature in an acceptable scope of safety, it is ensured that the safety of lithium ion battery.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 86
～90 DEG C of back flow reaction 4～6 hours, after the powder of gained being mixed with polyacrylamide after filtration drying, then at rotating speed it is
Stir process 1～2 hours under 20～40rpm, then stir process 0.5～1 hour under rotating speed is 100～200rpm, prepare poly-
Ethylene microsphere slurries, then carries out calendering formation by polyethylene microsphere slurries, and prepared thickness is the polyethylene film of 4～6 μm；
B) Kynoar is joined in dehydrated alcohol, stir process 10～20 minutes at 70～80 DEG C, the most successively to
Wherein add cotton fiber and inorfil, stir process 30～40 minutes at 60～70 DEG C, it is eventually adding carboxymethyl cellulose
Element sodium stirs 5～10 minutes at 60～70 DEG C, prepares fibre stuff；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 2～4 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 90～100 DEG C of curing moldings, prepared lithium ion battery blowout disk.
The present invention use with polyethylene microsphere prepare polyethylene film as basement membrane, basement membrane both sides coating be dispersed with Cotton Gossypii
Fiber and the pulp layer of inorfil, then enter formation lithium ion battery blowout disk after solidification；Kynoar in the present invention
Adding as a kind of binding agent, in order to make cotton fiber and inorfil molding, but Kynoar is a kind of the most simultaneously
There is the macromolecular material of positive temperature coefficient, although it is special that the α-Kynoar in the case of Ping Chang does not exist positive temperature coefficient
Property, but α-Kynoar can be changed into β-Kynoar after 80～110 DEG C of Temperature Treatment, and β-polyvinylidene fluoride
Alkene has ptc characteristics, the 90～100 DEG C of curing molding operations therefore carried out after last slurry coats, and can play
Make the effect of barrier film curing molding, can also be that the Kynoar in barrier film carries out changing make in barrier film poly-inclined simultaneously
Fluorothene also has ptc characteristics, improves the security performance of barrier film further.
As preferably, in step b, the rotating speed of stir process is all 50～60rpm.
Therefore, the method have the advantages that
(1) battery diaphragm in the present invention there is fiber as reinforcement, even being also less likely to occur significantly after by high temperature
Shrink；
(2) present invention with the addition of the multiple material with ptc characteristics, lithium ion can be blocked in the case of a high temperature
The migration of battery electrolyte inside intermediate ion；
(3) the lithium ion battery separator preparation method advantages of simple in the present invention, prepared barrier film has the layer being similar to three layers
Shape structure, the film layer that middle polyethylene microsphere prepares plays a supportive role, and the fibrous layer in outside plays booster action.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is further described.
Embodiment 1
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 50
Part, Kynoar 15 parts, sodium carboxymethyl cellulose 10 parts, dehydrated alcohol 20 parts, polyethylene microsphere 60 parts, triethoxy ethylene
Base silane 3 parts, polyacrylamide 1 part；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 86
DEG C back flow reaction 4 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 20rpm
Stir process 1 hour, then stir process 0.5 hour under rotating speed is 100rpm, prepare polyethylene microsphere slurries, then by poly-second
Alkene microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 4 μm；
B) joining in dehydrated alcohol by Kynoar, at 70 DEG C, stir process 10 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 30 minutes at 60 DEG C, it is eventually adding sodium carboxymethyl cellulose at 60 DEG C, stirs 5
Minute, prepare fibre stuff；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 2 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 90 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Embodiment 2
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 60
Part, Kynoar 20 parts, sodium carboxymethyl cellulose 12 parts, dehydrated alcohol 22 parts, polyethylene microsphere 65 parts, triethoxy ethylene
Base silane 3.5 parts, polyacrylamide 1.5 parts；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 88
DEG C back flow reaction 5 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 30rpm
Stir process 1.5 hours, then stir process 0.7 hour under rotating speed is 150rpm, prepare polyethylene microsphere slurries, then will be poly-
Ethylene microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 5 μm；
B) joining in dehydrated alcohol by Kynoar, at 75 DEG C, stir process 15 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 35 minutes at 65 DEG C, it is eventually adding sodium carboxymethyl cellulose at 65 DEG C, stirs 7
Minute, prepare fibre stuff；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 3 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 95 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Embodiment 3
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 70
Part, Kynoar 25 parts, sodium carboxymethyl cellulose 15 parts, dehydrated alcohol 25 parts, polyethylene microsphere 70 parts, triethoxy ethylene
Base silane 4 parts, polyacrylamide 2 parts；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 90
DEG C back flow reaction 6 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 40rpm
Stir process 2 hours, then stir process 1 hour under rotating speed is 200rpm, prepare polyethylene microsphere slurries, then by polyethylene
Microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 6 μm；
B) joining in dehydrated alcohol by Kynoar, at 80 DEG C, stir process 20 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 40 minutes at 70 DEG C, it is eventually adding sodium carboxymethyl cellulose and stirs at 70 DEG C
10 minutes, prepare fibre stuff；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 4 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 100 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Embodiment 4
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 50
Part, Kynoar 15 parts, sodium carboxymethyl cellulose 10 parts, dehydrated alcohol 20 parts, polyethylene microsphere 60 parts, triethoxy ethylene
Base silane 3 parts, polyacrylamide 1 part；A length of 1 μm of cotton fiber, the particle diameter of polyethylene microsphere is 0.2 μm；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 86
DEG C back flow reaction 4 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 20rpm
Stir process 1 hour, then stir process 0.5 hour under rotating speed is 100rpm, prepare polyethylene microsphere slurries, then by poly-second
Alkene microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 4 μm；
B) joining in dehydrated alcohol by Kynoar, at 70 DEG C, stir process 10 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 30 minutes at 60 DEG C, it is eventually adding sodium carboxymethyl cellulose at 60 DEG C, stirs 5
Minute, prepare fibre stuff；The rotating speed of stir process is all 50rpm；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 2 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 90 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Embodiment 5
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 60
Part, Kynoar 20 parts, sodium carboxymethyl cellulose 13 parts, dehydrated alcohol 23 parts, polyethylene microsphere 65 parts, triethoxy ethylene
Base silane 4 parts, polyacrylamide 2 parts；A length of 2 μm of cotton fiber, the particle diameter of polyethylene microsphere is 0.6 μm；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 88
DEG C back flow reaction 5 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 30rpm
Stir process 1.5 hours, then stir process 0.7 hour under rotating speed is 150rpm, prepare polyethylene microsphere slurries, then will be poly-
Ethylene microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 5 μm；
B) joining in dehydrated alcohol by Kynoar, at 75 DEG C, stir process 15 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 35 minutes at 65 DEG C, it is eventually adding sodium carboxymethyl cellulose at 65 DEG C, stirs 8
Minute, prepare fibre stuff；The rotating speed of stir process is all 55rpm；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 3 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 95 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Embodiment 6
A kind of lithium ion battery blowout disk, is prepared by the raw material of following weight portion: inorfil 100 parts, cotton fiber 70
Part, Kynoar 25 parts, sodium carboxymethyl cellulose 15 parts, dehydrated alcohol 25 parts, polyethylene microsphere 70 parts, triethoxy ethylene
Base silane 4 parts, polyacrylamide 2 parts；A length of 2 μm of cotton fiber, the particle diameter of polyethylene microsphere is 1 μm；
Wherein, inorfil is prepared by following steps: add mixing after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed
Fused salt and dehydrated alcohol ball mill pulverizing 5 hours, calcine 7 hours at 800 DEG C after drying, dry after pulverizing after calcining and cleaning with water
Dry；Fused salt mixt is the sodium chloride and potassium chloride salt-mixture of mol ratio 1:1, and the weight of fused salt mixt is titanium dioxide and brium carbonate weight
9 times of amount, the weight of dehydrated alcohol is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
The preparation method of a kind of lithium ion battery blowout disk, is prepared by following steps:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 90
DEG C back flow reaction 6 hours, after being mixed with polyacrylamide by the powder of gained after filtration drying, then under rotating speed is 40rpm
Stir process 2 hours, then stir process 1 hour under rotating speed is 200rpm, prepare polyethylene microsphere slurries, then by polyethylene
Microsphere slurries carries out calendering formation, and prepared thickness is the polyethylene film of 6 μm；
B) joining in dehydrated alcohol by Kynoar, at 80 DEG C, stir process 20 minutes, are added thereto to the most successively
Cotton fiber and inorfil, stir process 40 minutes at 70 DEG C, it is eventually adding sodium carboxymethyl cellulose and stirs at 70 DEG C
10 minutes, prepare fibre stuff；The rotating speed of stir process is all 60rpm；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 4 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 100 DEG C of curing moldings, prepared lithium ion battery blowout disk.
Technical specification:
1. ion blocks temperature is 130 DEG C；
2. hot strength >=12MPa.
Claims (6)
1. a lithium ion battery blowout disk, it is characterised in that prepared by the raw material of following weight portion: inorfil 100
Part, cotton fiber 50～70 parts, Kynoar 15～25 parts, sodium carboxymethyl cellulose 10～15 parts, dehydrated alcohol 20～25
Part, polyethylene microsphere 60～70 parts, Triethoxyvinylsilane 3～4 parts, polyacrylamide 1～2 parts.
A kind of lithium ion battery blowout disk the most according to claim 1, it is characterised in that: the length of described cotton fiber
Degree is 1～2 μm.
A kind of lithium ion battery blowout disk the most according to claim 1, it is characterised in that: described polyethylene microsphere
Particle diameter be 0.2～1 μm.
A kind of lithium ion battery blowout disk the most according to claim 1, it is characterised in that described inorfil leads to
Cross following steps to prepare: after titanium dioxide and brium carbonate 1:1 in molar ratio being mixed, add fused salt mixt and dehydrated alcohol ball milling
Pulverize 5 hours, calcine 7 hours at 800 DEG C after drying, be dried after pulverizing after calcining and cleaning with water；Fused salt mixt is mol ratio
The sodium chloride and potassium chloride salt-mixture of 1:1, the weight of fused salt mixt is 9 times of titanium dioxide and brium carbonate weight, dehydrated alcohol
Weight is 3 times of titanium dioxide, brium carbonate and fused salt mixt gross weight.
5. the preparation method of a lithium ion battery blowout disk according to claim 1, it is characterised in that by following
Step prepares:
A) polyethylene microsphere is joined in the toluene weighed with polyethylene microsphere etc., and add Triethoxyvinylsilane 86
～90 DEG C of back flow reaction 4～6 hours, after the powder of gained being mixed with polyacrylamide after filtration drying, then at rotating speed it is
Stir process 1～2 hours under 20～40rpm, then stir process 0.5～1 hour under rotating speed is 100～200rpm, prepare poly-
Ethylene microsphere slurries, then carries out calendering formation by polyethylene microsphere slurries, and prepared thickness is the polyethylene film of 4～6 μm；
B) Kynoar is joined in dehydrated alcohol, stir process 10～20 minutes at 70～80 DEG C, the most successively to
Wherein add cotton fiber and inorfil, stir process 30～40 minutes at 60～70 DEG C, it is eventually adding carboxymethyl cellulose
Element sodium stirs 5～10 minutes at 60～70 DEG C, prepares fibre stuff；
C) fibre stuff being coated in polyethylene film both sides, unilateral thickness is 2～4 μm, prepares barrier film semi-finished product；
D) by barrier film semi-finished product at 90～100 DEG C of curing moldings, prepared lithium ion battery blowout disk.
The preparation method of a kind of lithium ion battery blowout disk the most according to claim 5, it is characterised in that: described step
In rapid b, the rotating speed of stir process is all 50～60rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610725552.8A CN106299219A (en) | 2016-08-26 | 2016-08-26 | A kind of lithium ion battery blowout disk and preparation method thereof |
Applications Claiming Priority (1)
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