CN102779963A - Method for manufacturing lithium ion cell diaphragm - Google Patents
Method for manufacturing lithium ion cell diaphragm Download PDFInfo
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- CN102779963A CN102779963A CN201210274759XA CN201210274759A CN102779963A CN 102779963 A CN102779963 A CN 102779963A CN 201210274759X A CN201210274759X A CN 201210274759XA CN 201210274759 A CN201210274759 A CN 201210274759A CN 102779963 A CN102779963 A CN 102779963A
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- lithium ion
- ion battery
- precursor
- battery separator
- diaphragm
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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
- 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 method for manufacturing a lithium ion cell diaphragm. The method comprises the following steps of dissolving polyvinylidene fluoride in an organic solvent, adding organic powder, and mixing uniformly to obtain slurry, wherein the organic powder consists of lithium salt and a nanometer padding; spraying the slurry on the surface of a negative electrode sheet or a positive electrode sheet; taking out the negative electrode sheet or the positive electrode sheet from a box body, and irradiating the surface of the negative electrode or the positive electrode coated with mixed liquid by ultraviolet lights to obtain a precursor of the lithium ion cell diaphragm; and coating a coating composite on the precursor of the lithium ion cell diaphragm. The precursor of the diaphragm manufactured by the method disclosed by the invention is coated in a foaming manner so that excellent diaphragm micropore parameters are obtained and the performances of the diaphragm are improved; when the diaphragm manufactured by the method is applied to a lithium ion cell, the power of a short circuit point of a circuit is smaller than that of the traditional diaphragm in a short circuit process so that a purpose of improving the safety is realized.
Description
Technical field
The present invention relates to a kind of preparation method of lithium ion battery separator, relate in particular to a kind of preparation method of micropore diaphragm.
Background technology
Since Sony in 1991 was successfully the lithium ion battery commercialization, lithium ion battery had become the main power supply of mobile phone, notebook computer and digital electronic goods.New forms of energy battery technology development in recent years is very fast; Compare with traditional secondary storage batterys such as lead-acid battery, Ni-MH batteries, characteristics such as lithium ion battery is big with its energy density and power density, memory-less effect, self discharge is less and cycle life is long become the developing direction of vehicle mounted dynamic battery.
Lithium ion battery separator is the important composition material of lithium ion battery, and normally thin cellular insulant material has good ion trafficability characteristic and mechanical strength, and various chemical substances and chemical solvent are had long-time stability.The non-conductive property of the electronics of barrier film can be isolated the both positive and negative polarity of battery, prevents the contact of two electrodes and short circuit; The multi-cellular structure that the while barrier film has has guaranteed that ion flow is smooth and easy.Externally battery causes the internal temperature rising because when being short-circuited the accident fault, inside battery will produce big electric current; Heat fusing will take place and close microcellular structure in barrier film this moment, thereby cut off electric current, stop battery operated; Prevent explosion accident, guarantee battery and personal safety.Therefore, barrier film is one of critical material of electrokinetic cell.
Summary of the invention
Preparation method's the preparation method who the purpose of this invention is to provide a kind of a kind of lithium ion battery separator of excellent performance, the barrier film of this method preparation can effectively guarantee the safety of lithium battery when improper operation, and feels that the favorable conductive rate is arranged.
To achieve these goals, the preparation method of a kind of lithium ion battery separator provided by the invention comprises the steps:
Step 1 is dissolved in 5 ~ 12 parts by weight of polyvinylidene fluoride in 50 ~ 80 weight portion organic solvents, adds the inorganic material powders of 2 ~ 5 weight portions, and mixing gets slurry, and wherein said inorganic matter is made up of lithium salts and Nano filling;
Step 2 is sprayed on the surface of negative plate or positive plate with said slurry, in relative humidity is 80% ~ 98% casing, places 1 ~ 3min;
Step 3 is taken out said negative plate or positive plate in said casing, the negative plate or the positive plate that scribble slurry with UV-irradiation are surperficial, obtains the precursor of lithium ion battery separator;
Step 4 is coated with coating composition on the lithium ion battery separator precursor:
Wherein the component of composition is by weight: 40 parts of acrylic acid ester emulsions, diameter are 30 parts of the silica powders of 10-100 nanometer; As 2 parts of the surfactant APGs of blowing agent, as 3 parts of the silicone based foam stabiliser QBH (polysiloxane polyether copolymer) of foam stabilizer, 21 parts in water;
Step 4.1 with the alkali thickening acrylic acid ester emulsion and the Sodium Polyacrylate of above-mentioned composition, 3 weight portions, is mixed, and the viscosity of regulating coating composition is to 3000mPa
S obtains suspension;
Step 4.2 foams above-mentioned suspension, regulates foam density to 200 grams per liter, uses foam applying device foam to be coated in uniformly on the precursor of lithium ion battery separator;
Step 4.3 is dried the foam coating on the precursor that is coated in lithium ion battery separator under 100 ℃ temperature, make water capacity reach 10%, after the roll compacting of 200N/cm, under 150 ℃, bakes 2min again, obtains lithium ion battery separator.
Wherein, have micropore on the barrier film that makes, the thickness d of said barrier film, porosity pr and aperture ps meet the following conditions respectively: 10 μ m≤d≤30 μ m, 60%≤pr≤70% and 90nm≤ps≤110nmm.
The barrier film that adopts this method to make; Because on the barrier film precursor, having adopted foaming smears; Obtained more excellent barrier film micropore parameter, thereby improved the performance of barrier film, when being used for lithium ion battery; Power when making the power ratio of battery short dot in the short circuit process use traditional barrier film is little, thereby reaches the purpose of improving fail safe.
Embodiment
Embodiment one
5 parts by weight of polyvinylidene fluoride are dissolved in the 50 weight portion organic solvents, add the inorganic material powders of weight portion, mixing gets slurry, and wherein said inorganic matter is made up of lithium salts and Nano filling; Said slurry is sprayed on the surface of negative plate or positive plate, in relative humidity is 80% casing, places 1min; Said negative plate or positive plate are taken out in said casing, and the negative plate or the positive plate that scribble mixed liquor with UV-irradiation are surperficial, obtain the precursor of lithium ion battery separator.
On the lithium ion battery separator precursor, be coated with coating composition:
Wherein the component of composition is by weight: 40 parts of acrylic acid ester emulsions, diameter are 30 parts of the silica powders of 10 nanometers; As 2 parts of the green surfactant APGs of blowing agent, as 3 parts of the silicone based foam stabiliser QBH (polysiloxane polyether copolymer) of foam stabilizer, 21 parts in water.
With the alkali thickening acrylic acid ester emulsion and the Sodium Polyacrylate of above-mentioned composition, 3 weight portions, to mix, the viscosity of regulating coating composition is to 3000mPa
S obtains suspension; Above-mentioned suspension is foamed, regulate about foam density to 200 grams per liter, use foam applying device foam to be coated in uniformly on the precursor of lithium ion battery separator; Foam coating on the precursor that is coated in lithium ion battery separator is dried under 100 ℃ temperature, water capacity is reached about 10%, after the roll compacting of 200N/cm, under 150 ℃, bake 2min again, obtain lithium ion battery separator.
The diaphragm parameter is seen table 1.
Table 1, embodiment 1 diaphragm parameter
| Membrane thicknesses/micron | 15 |
| Porosity/% | 65.4 |
| Average pore size/nanometer | 108 |
Embodiment two
12 parts by weight of polyvinylidene fluoride are dissolved in the 80 weight portion organic solvents, add the inorganic material powders of 5 weight portions, mixing gets slurry, and wherein said inorganic matter is made up of lithium salts and Nano filling; Said slurry is sprayed on the surface of negative plate or positive plate, in relative humidity is 98% casing, places 3min; Said negative plate or positive plate are taken out in said casing, scribble the negative plate or the positive plate of mixed liquor, obtain the precursor of lithium ion battery separator with UV-irradiation.
On the lithium ion battery separator precursor, be coated with coating composition:
Wherein the component of composition is by weight: 40 parts of acrylic acid ester emulsions, diameter are 30 parts of the silica powders of 100 nanometers; As 2 parts of the green surfactant APGs of blowing agent, as 3 parts of the silicone based foam stabiliser QBH (polysiloxane polyether copolymer) of foam stabilizer, 21 parts in water.
With the alkali thickening acrylic acid ester emulsion and the Sodium Polyacrylate of above-mentioned composition, 3 weight portions, to mix, the viscosity of regulating coating composition obtains suspension to 3000mPas; Above-mentioned suspension is foamed, regulate about foam density to 200 grams per liter, use foam applying device foam to be coated in uniformly on the precursor of lithium ion battery separator; Foam coating on the precursor that is coated in lithium ion battery separator is dried under 100 ℃ temperature, water capacity is reached about 10%, after the roll compacting of 200N/cm, under 150 ℃, bake 2min again, obtain lithium ion battery separator.
The parameter of the battery diaphragm that the preparation method of employing present embodiment obtains is seen table 2.
Table 2, embodiment 2 diaphragm parameters
| Membrane thicknesses/micron | 25 |
| Porosity/% | 62.1 |
| Average pore size/nanometer | 95 |
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment made, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (2)
1. the preparation method of a lithium ion battery separator is characterized in that, comprises the steps:
Step 1 is dissolved in 5 ~ 12 parts by weight of polyvinylidene fluoride in 50 ~ 80 weight portion organic solvents, adds the inorganic material powders of 2 ~ 5 weight portions, and mixing obtains slurry, and wherein said inorganic matter is made up of lithium salts and Nano filling;
Step 2 is sprayed on the surface of negative plate or positive plate with said slurry, in relative humidity is 80% ~ 98% casing, places 1 ~ 3min;
Step 3 is taken out said negative plate or positive plate in said casing, the negative plate or the positive plate that scribble slurry with UV-irradiation are surperficial, obtains the precursor of lithium ion battery separator;
Step 4 is coated with coating composition on the lithium ion battery separator precursor:
Wherein the component of composition is by weight: 40 parts of acrylic acid ester emulsions, diameter are 30 parts of the silica powders of 10-100 nanometer; As 2 parts of the surfactant APGs of blowing agent, as 3 parts of the silicone based foam stabiliser polysiloxane polyether copolymers of foam stabilizer, 21 parts in water;
Step 4.1 with the alkali thickening acrylic acid ester emulsion and the Sodium Polyacrylate of above-mentioned composition, 3 weight portions, is mixed, and the viscosity of regulating coating composition is to 3000mPa
S obtains suspension;
Step 4.2 foams above-mentioned suspension, regulates foam density to 200 grams per liter, uses foam applying device foam to be coated in uniformly on the precursor of lithium ion battery separator;
Step 4.3 is dried the foam coating on the precursor that is coated in lithium ion battery separator under 100 ℃ temperature, make water capacity reach 10%, after the roll compacting of 200N/cm, under 150 ℃, bakes 2min again, obtains lithium ion battery separator.
2. the preparation method of lithium ion battery separator as claimed in claim 1; It is characterized in that; Have micropore on the barrier film that makes, the thickness d of said barrier film, porosity pr and aperture ps meet the following conditions respectively: 10 μ m≤d≤30 μ m, 60%≤pr≤70% and 90nm≤ps≤110nmm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274759XA CN102779963A (en) | 2012-08-03 | 2012-08-03 | Method for manufacturing lithium ion cell diaphragm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274759XA CN102779963A (en) | 2012-08-03 | 2012-08-03 | Method for manufacturing lithium ion cell diaphragm |
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| CN102779963A true CN102779963A (en) | 2012-11-14 |
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| CN201210274759XA Pending CN102779963A (en) | 2012-08-03 | 2012-08-03 | Method for manufacturing lithium ion cell diaphragm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165843A (en) * | 2013-04-08 | 2013-06-19 | 严红飞 | Preparation method of battery diaphragm of lithium battery for handheld electronic game console |
| CN109690839A (en) * | 2016-07-22 | 2019-04-26 | 魁北克电力公司 | Flexible electrode-spacer element and preparation method thereof |
| CN111146396A (en) * | 2019-12-30 | 2020-05-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device including the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030044799A1 (en) * | 2001-08-31 | 2003-03-06 | Matson Robert S. | Analysis using a distributed sample |
| JP2004523060A (en) * | 2000-09-20 | 2004-07-29 | ユーティーシー フューエル セルズ，エルエルシー | Fuel cell stack assembly with end seal |
| CN101789499A (en) * | 2010-01-19 | 2010-07-28 | 中国海诚工程科技股份有限公司 | Coating composite for lithium ion battery separator and foam gluing method |
| CN102437304A (en) * | 2011-12-13 | 2012-05-02 | 北京好风光储能技术有限公司 | Diaphragm and method for preparing composite electrode couple by utilizing diaphragm |
-
2012
- 2012-08-03 CN CN201210274759XA patent/CN102779963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004523060A (en) * | 2000-09-20 | 2004-07-29 | ユーティーシー フューエル セルズ，エルエルシー | Fuel cell stack assembly with end seal |
| US20030044799A1 (en) * | 2001-08-31 | 2003-03-06 | Matson Robert S. | Analysis using a distributed sample |
| CN101789499A (en) * | 2010-01-19 | 2010-07-28 | 中国海诚工程科技股份有限公司 | Coating composite for lithium ion battery separator and foam gluing method |
| CN102437304A (en) * | 2011-12-13 | 2012-05-02 | 北京好风光储能技术有限公司 | Diaphragm and method for preparing composite electrode couple by utilizing diaphragm |
Non-Patent Citations (1)
| Title |
|---|
| 任旭梅等: "用PAN作造孔剂制备聚合物锂离子电池隔膜", 《电池》, vol. 32, 30 June 2002 (2002-06-30) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165843A (en) * | 2013-04-08 | 2013-06-19 | 严红飞 | Preparation method of battery diaphragm of lithium battery for handheld electronic game console |
| CN103165843B (en) * | 2013-04-08 | 2014-12-24 | 张贵萍 | Preparation method of battery diaphragm of lithium battery for handheld electronic game console |
| CN109690839A (en) * | 2016-07-22 | 2019-04-26 | 魁北克电力公司 | Flexible electrode-spacer element and preparation method thereof |
| CN109690839B (en) * | 2016-07-22 | 2022-06-03 | 魁北克电力公司 | Flexible electrode-separator element and method for the production thereof |
| CN111146396A (en) * | 2019-12-30 | 2020-05-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device including the same |
| CN111146396B (en) * | 2019-12-30 | 2022-11-04 | 宁德新能源科技有限公司 | Electrochemical device and electronic device including the same |
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Application publication date: 20121114 |