CN103700796A - Preparation method of lithium ion diaphragm - Google Patents
Preparation method of lithium ion diaphragm Download PDFInfo
- Publication number
- CN103700796A CN103700796A CN201310652139.XA CN201310652139A CN103700796A CN 103700796 A CN103700796 A CN 103700796A CN 201310652139 A CN201310652139 A CN 201310652139A CN 103700796 A CN103700796 A CN 103700796A
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- Prior art keywords
- described step
- preparation
- lithium
- ion membrane
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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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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a preparation method of a lithium ion diaphragm. The preparation method comprises the following steps of (1) weighing 15 to 30 parts of high-density polyethylene, 1 to 2 parts of silicon dioxide, 1 to 2 parts of bismuth oxide, 1 to 2 parts of aluminum oxide and 50 to 60 pats of plasticizing agent; (2) mixing the materials in step (1) at a rotation speed of 150 to 180 turns per minute at 180 to 300 DEG C to obtain a homogenous fused mixed solution; (3) extruding the obtained fused mixed solution, and cooling and casting the solution into thick plates on a cooling roller; (4) eluting the prepared thick plates by utilizing an extraction solvent; (5) stretching the eluted thick plate first in longitudinal direction and then in transverse direction at 100-150 DEG C to form a film, wherein the total stretching rate is 5 to 25 times; and (6) drying the film through the hot air of 150DEG C to obtain the lithium ion diaphragm. The lithium ion diaphragm prepared through the method not only has high breathability, but also has high mechanical strength.
Description
Technical field
The invention belongs to technical field of lithium batteries, particularly, the present invention relates to a kind of preparation method of lithium-ion membrane.
Background technology
Barrier film is mainly by three effects in lithium ion battery, and (1) separates both positive and negative polarity, only allows ion to pass through, and is the insulator of electronics, to prevent short circuit; (2) keep electrolyte, form ion channel, and itself do not participate in the electrochemical reaction in battery, highly crooked passage also can prevent Li dendrite growth; (3) when battery temperature raises, micropore shrinks or is closed, and the effect of protection is played in the rising of Limited Current.But because barrier film insulate, inevitably increased the internal resistance of battery, so its performance has directly affected internal resistance, interfacial structure, cycle performance of battery etc.The barrier film of excellent performance, for the combination property that improves battery, has very important effect.
At present, lithium ion battery separator is mainly by weaving film, nowoven membrane (nonwoven fabrics), microporous barrier, composite membrane, diaphragm paper etc.Polyalkene diaphragm, owing to having multiple advantage, is studied the most active at present; But this lithium ion battery separator also exists many shortcomings, for example highly-breathable and mechanical strength are difficult to obtain simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of lithium-ion membrane, and lithium-ion membrane prepared by the method not only has highly-breathable, and has higher mechanical strength.
The present invention solves the problems of the technologies described above the preparation method that adopted technical scheme is a kind of lithium-ion membrane, comprises the following steps:
(1) composition that weighs following parts by weight is as raw material: high density polyethylene (HDPE) 15-30 part, silica 1-2 part, bismuth oxide 1-2 part, aluminium oxide 1-2 part, plasticizer 50-60 part; Described raw material is mixed to get to mixed material;
(2) make the mixed material of described step (1) at the temperature of 180～300 ℃, under the rotating speed of 150-180 rev/min, mix 20-30 minute, obtain the melting mixing liquid of homogeneous;
(3) the melting mixing liquid described step (2) being obtained is extruded by double screw extruder, and on chill roll the cooling sheet of casting;
(4) in the sheet of being prepared by described step (3), use extractant wash-out,
(5) the first longitudinally rear cross directional stretch of the sheet after described step (4) wash-out is made to film, total multiplying power that stretches is 5-25 times, and draft temperature is 100-150 ℃;
(6) film described step (5) being prepared into, through 150 ℃ of hot-air seasonings, obtains described lithium-ion membrane.
Described plasticizer is selected from a kind of in atoleine, solid paraffin and neck phthalic acid diisobutyl ester.
In described step (1), the mass ratio of described silicon dioxide, bismuth oxide, aluminium oxide is 2:1:1.
In described step (4), described extractant is selected from one or more of cyclohexane, pentane, heptane, halogenated hydrocarbons.
Compared with prior art, tool has the following advantages in the present invention:
(1) lithium-ion membrane that prepared by the inventive method not only has highly-breathable, and has higher mechanical strength.
(2) the inventive method technique is simple, and production cost is low.
Embodiment
In order to understand better content of the present invention, below in conjunction with specific embodiment, be described further.Should be understood that these embodiment, only for the present invention is further described, limit the scope of the invention and be not used in.In addition should be understood that after having read content of the present invention, person skilled in art makes some nonessential change or adjustment to the present invention, still belongs to protection scope of the present invention.
Embodiment 1
Embodiment 1
Prepare by the following method lithium-ion membrane:
(1) composition that weighs following parts by weight is as raw material: 20 parts of high density polyethylene (HDPE)s, 2 parts of silicon dioxide, 1 part of bismuth oxide, 1 part, aluminium oxide, 50 parts of atoleines; Described raw material is mixed to get to mixed material;
(2) make the mixed material of described step (1) at the temperature of 300 ℃, under the rotating speed of 150 revs/min, mix 30 minutes, obtain the melting mixing liquid of homogeneous;
(3) the melting mixing liquid described step (2) being obtained is extruded by double screw extruder, and on chill roll the cooling sheet of casting;
(4) in the sheet of being prepared by described step (3), use cyclohexane wash-out,
(5) the first longitudinally rear cross directional stretch of the sheet after described step (4) wash-out is made to film, 5 * 4 times of total multiplying powers that stretches, longitudinal stretching temperature is 100 ℃, to draft temperature, is laterally 120 ℃;
(6) film described step (5) being prepared into, through 150 ℃ of hot-air seasonings, obtains described lithium-ion membrane.
Wherein draw high total multiplying power with longitudinal stretching multiplying power * laterally represent to stretching ratio.
Embodiment 2
According to the method identical with embodiment 1, prepare lithium-ion membrane, its difference is not use aluminium oxide.
Embodiment 3
According to the method identical with embodiment 1, prepare lithium-ion membrane, its difference is not use bismuth oxide.
The performance parameter of each embodiment is as following table
As mentioned above, just can realize preferably the present invention.
Claims (4)
1. a preparation method for lithium-ion membrane, is characterized in that, comprises the following steps:
(1) composition that weighs following parts by weight is as raw material: high density polyethylene (HDPE) 15-30 part, silica 1-2 part, bismuth oxide 1-2 part, aluminium oxide 1-2 part, plasticizer 50-60 part; Described raw material is mixed to get to mixed material;
(2) make the mixed material of described step (1) at the temperature of 180～300 ℃, under the rotating speed of 150-180 rev/min, mix 20-30 minute, obtain the melting mixing liquid of homogeneous;
(3) the melting mixing liquid described step (2) being obtained is extruded by double screw extruder, and on chill roll the cooling sheet of casting;
(4) in the sheet of being prepared by described step (3), use extractant wash-out,
(5) the first longitudinally rear cross directional stretch of the sheet after described step (4) wash-out is made to film, total multiplying power that stretches is 5-25 times, and draft temperature is 100-150 ℃;
(6) film described step (5) being prepared into, through 150 ℃ of hot-air seasonings, obtains described lithium-ion membrane.
2. the preparation method of a kind of lithium-ion membrane according to claim 1, is characterized in that, described plasticizer is selected from a kind of in atoleine, solid paraffin and neck phthalic acid diisobutyl ester.
3. the preparation method of a kind of lithium-ion membrane according to claim 1, is characterized in that, in described step (1), the mass ratio of described silicon dioxide, bismuth oxide, aluminium oxide is 2:1:1.
4. the preparation method of a kind of lithium-ion membrane according to claim 1, is characterized in that, in described step (4), described extractant is selected from one or more of cyclohexane, pentane, heptane, halogenated hydrocarbons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652139.XA CN103700796A (en) | 2013-12-05 | 2013-12-05 | Preparation method of lithium ion diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652139.XA CN103700796A (en) | 2013-12-05 | 2013-12-05 | Preparation method of lithium ion diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103700796A true CN103700796A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310652139.XA Pending CN103700796A (en) | 2013-12-05 | 2013-12-05 | Preparation method of lithium ion diaphragm |
Country Status (1)
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| CN (1) | CN103700796A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910857A (en) * | 2015-12-22 | 2017-06-30 | 住友化学株式会社 | The manufacture method and battery separator manufacture device of battery separator |
| CN109860474A (en) * | 2018-12-07 | 2019-06-07 | 上海空间电源研究所 | A kind of active membrane and preparation method thereof |
| CN111081948A (en) * | 2019-12-26 | 2020-04-28 | 江苏厚生新能源科技有限公司 | Preparation method of high linear velocity-large width polyethylene diaphragm |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1479392A (en) * | 2003-01-22 | 2004-03-03 | �Ϻ���ͨ��ѧ | Composite polymer diaphram used for secondary lithium battery and its preparation technology |
| CN101841013A (en) * | 2010-02-11 | 2010-09-22 | 华南师范大学 | Polymer isolating membrane and lithium ion battery applying same |
| CN103022401A (en) * | 2012-12-31 | 2013-04-03 | 新乡市中科科技有限公司 | Preparation method of lithium-ion polyolefin membrane |
| KR20130047424A (en) * | 2011-10-31 | 2013-05-08 | 전자부품연구원 | Non-woven separator for lithium secondary battery and manufacturing method thereof |
| CN103199210A (en) * | 2013-04-22 | 2013-07-10 | 上海双奥能源技术有限公司 | Lithium ion battery diaphragm |
| CN103199300A (en) * | 2013-04-22 | 2013-07-10 | 上海双奥能源技术有限公司 | Coated lithium ion battery diaphragm |
-
2013
- 2013-12-05 CN CN201310652139.XA patent/CN103700796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479392A (en) * | 2003-01-22 | 2004-03-03 | �Ϻ���ͨ��ѧ | Composite polymer diaphram used for secondary lithium battery and its preparation technology |
| CN101841013A (en) * | 2010-02-11 | 2010-09-22 | 华南师范大学 | Polymer isolating membrane and lithium ion battery applying same |
| KR20130047424A (en) * | 2011-10-31 | 2013-05-08 | 전자부품연구원 | Non-woven separator for lithium secondary battery and manufacturing method thereof |
| CN103022401A (en) * | 2012-12-31 | 2013-04-03 | 新乡市中科科技有限公司 | Preparation method of lithium-ion polyolefin membrane |
| CN103199210A (en) * | 2013-04-22 | 2013-07-10 | 上海双奥能源技术有限公司 | Lithium ion battery diaphragm |
| CN103199300A (en) * | 2013-04-22 | 2013-07-10 | 上海双奥能源技术有限公司 | Coated lithium ion battery diaphragm |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910857A (en) * | 2015-12-22 | 2017-06-30 | 住友化学株式会社 | The manufacture method and battery separator manufacture device of battery separator |
| CN109860474A (en) * | 2018-12-07 | 2019-06-07 | 上海空间电源研究所 | A kind of active membrane and preparation method thereof |
| CN109860474B (en) * | 2018-12-07 | 2022-04-05 | 上海空间电源研究所 | Active diaphragm and preparation method thereof |
| CN111081948A (en) * | 2019-12-26 | 2020-04-28 | 江苏厚生新能源科技有限公司 | Preparation method of high linear velocity-large width polyethylene diaphragm |
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Application publication date: 20140402 |