CN105355813A - Lithium ion battery diaphragm material and preparation method thereof - Google Patents
Lithium ion battery diaphragm material and preparation method thereof Download PDFInfo
- Publication number
- CN105355813A CN105355813A CN201510922541.4A CN201510922541A CN105355813A CN 105355813 A CN105355813 A CN 105355813A CN 201510922541 A CN201510922541 A CN 201510922541A CN 105355813 A CN105355813 A CN 105355813A
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- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- diaphragm
- polyolefin
- battery separator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
-
- 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
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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
-
- 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 provides a lithium ion battery diaphragm material and a preparation method thereof. The diaphragm material comprises base diaphragm materials and a coating layer, wherein the base diaphragm materials comprise polyolefin and porous aluminium oxide ultrafine powder; the coating layer is a fluoride varnish. The preparation method of the lithium ion battery diaphragm material comprises the steps of 1, evenly mixing the aluminium oxide ultrafine powder and the polyolefin; 2, extruding a polyolefin mixture in a twin-screw extruder. For a base diaphragm of the diaphragm material, the polyolefin and the porous aluminium oxide ultrafine powder are selected as the base diaphragm materials, so that the pore closing temperature of the diaphragm can be effectively reduced, and the pore uniformity of the diaphragm can be effectively improved; the surface of the diaphragm material is coated with a carbon-containing fluorine diaphragm material, so that the electrolyte dissolution resistance of a fluorine diaphragm can be effectively improved, and better safety and battery capacity are achieved in a battery application process.
Description
Technical field
The present invention relates to lithium battery material field, particularly a kind of lithium ion battery separator material and preparation method thereof.
Background technology
Lithium ion battery is important green energy resource battery, because its quality is light, specific capacity large and fail safe, is widely used in fields such as portable power source, notebook computer, mobile phone, power vehicles.Lithium ion battery is generally made up of battery case (encapsulating material), positive pole, negative pole, barrier film and electrolyte, barrier film is important isolation battery inner core positive and negative electrode material, in battery use procedure, lithium ion can pass freely through the discharge and recharge that barrier film realizes battery, the useful life of the fine or not direct relation battery of its quality and security performance.
At present, lithium ion battery separator material is mainly polyalkene diaphragm as single-layer polypropylene (PP) microporous barrier, monolayer polyethylene (PE) microporous barrier and three layers of PP/PE/PP composite membrane, and such barrier film preparation method is mainly dry method tension pore method and wet method phase separation method.Existing polyalkene diaphragm drawback is: easily shrink when 1, polyalkene diaphragm is heated, and diaphragm size can be caused unstable, and both positive and negative polarity directly contacts and short circuit; 2, closed pore temperature and broken film temperature lower, when battery occurring and the situation such as piercing through, a large amount of heat release of inside battery, causes barrier film to melt contraction completely, and battery short circuit produces high temperature until battery disintegrates or blast.
Summary of the invention
Goal of the invention: the present invention, for solving the problem, provides a kind of lithium ion battery separator material and preparation method thereof.This diaphragm material has lower closed pore temperature point and the high feature of broken film temperature, is a kind of diaphragm material of fail safe.
Technical scheme: a kind of lithium ion battery separator material and preparation method thereof, comprises basal lamina material and coating, and described basal lamina material comprises polyolefin and porous aluminum oxide superfine powder; Described barrier film is fluoro-containing coating.
As a preferred embodiment of the present invention, described polyolefin is one or both in polyethylene or polypropylene.
As a preferred embodiment of the present invention, the granular size of porous aluminum oxide superfine powder is 3000 order-5000 orders, and pore size is 5-100nm, and hole density is 10
10-10
12individual/cm
2.
As a preferred embodiment of the present invention, described alumina ultrafine powder content accounts for the 0.1-3% of described basal lamina material.
As a preferred embodiment of the present invention, the fluorine material in described fluoro-containing coating is one or more combinations in polytetrafluoroethylene, polyvinylidene fluoride, polytrifluorochloroethylene.
Prepare a preparation method for lithium ion battery separator material, comprise the following steps:
Step 1, alumina ultrafine powder and polyolefin carry out Homogeneous phase mixing, obtain polyolefin blend;
Step 2, polyolefin blend carries out extruding in double screw extruder, cool, blank, and the melting co-extrusion temperature of extruder is 130-180 DEG C, and chilling temperature is 5-30 DEG C;
Step 3, the material secondary in double screw extruder got in step 2 is extruded, cool, blank, mixing, stretching compressing tablet, and the melting co-extrusion temperature of extruder is 130-180 DEG C, and chilling temperature is 5-30 DEG C;
Step 4, compressing tablet material applies fluoro-containing coating, dries;
Step 5, carries out the compressing tablet material in plasma treatment step 4, obtains barrier film finished product under oxygen atmosphere.
Beneficial effect: the present invention compared with prior art, the basement membrane of this diaphragm material selects polyolefin and porous superfine alumina powder as basal lamina material, effectively can reduce the closed pore temperature of barrier film and improve porous nickel degree, at the fluorine membrane material of its surface-coated carbon containing, effectively can improve the anti-electrolyte solvability of barrier film, in battery applications process, there is better fail safe and battery capacity.
Embodiment
Below in conjunction with embodiment, illustrate the present invention further.
Embodiment 1
A kind of lithium ion battery separator material, comprise basal lamina material and coating, described basal lamina material comprises polyethylene and porous aluminum oxide superfine powder; Described coating is polytetrafluoroethylene.
Wherein, the granular size of porous aluminum oxide superfine powder is 3000 orders, and pore size is 5nm, and hole density is 10
10individual/cm
2.Described alumina ultrafine powder content accounts for 0.1% of described basal lamina material.
Prepare a preparation method for lithium ion battery separator material, comprise the following steps:
Step 1, polyethylene and porous aluminum oxide superfine powder Homogeneous phase mixing, obtain polyolefin blend;
Step 2, polyolefin blend carries out extruding in double screw extruder, cool, blank, and the melting co-extrusion temperature of extruder is 130 DEG C, and chilling temperature is 5 DEG C;
Step 3, the material secondary in double screw extruder got in step 2 is extruded, cool, blank, mixing, stretching compressing tablet, and the melting co-extrusion temperature of extruder is 130 DEG C, and chilling temperature is 5 DEG C;
Step 4, compressing tablet material applies tetrafluoroethene, dries;
Step 5, the compressing tablet material under oxygen atmosphere in plasma treatment step 4, obtains barrier film finished product.
Embodiment 2
A kind of lithium ion battery separator material, comprise basal lamina material and coating, described basal lamina material comprises polypropylene and porous aluminum oxide superfine powder; Described coating is the mixture of polyvinylidene fluoride and polytrifluorochloroethylene.
Wherein, the granular size of porous aluminum oxide superfine powder is 4000 orders, and pore size is 50nm, and hole density is 10
11individual/cm
2.Described alumina ultrafine powder content accounts for 2% of described basal lamina material.
Prepare a preparation method for lithium ion battery separator material, comprise the following steps:
Step 1, polypropylene and porous aluminum oxide superfine powder carry out Homogeneous phase mixing, obtain polyolefin blend;
Step 2, polyolefin blend carries out extruding in double screw extruder, cool, blank, and the melting co-extrusion temperature of extruder is 150 DEG C, and chilling temperature is 20 DEG C;
Step 3, the material secondary in double screw extruder got in step 2 is extruded, cool, blank, mixing, stretching compressing tablet, and the melting co-extrusion temperature of extruder is 150 DEG C, and chilling temperature is 20 DEG C;
Step 4, compressing tablet material applies the mixture of polyvinylidene fluoride and polytrifluorochloroethylene, dries;
Step 5, the compressing tablet material under oxygen atmosphere in plasma treatment step 4, obtains barrier film finished product.
Embodiment 3
A kind of lithium ion battery separator material, comprises basal lamina material and coating, and described basal lamina material comprises polyethylene and polyacrylic mixture and porous aluminum oxide superfine powder; Described coating is the mixture of tetrafluoroethene and polytrifluorochloroethylene.
Wherein, the granular size of porous aluminum oxide superfine powder is 5000 orders, and pore size is 100nm, and hole density is 10
12individual/cm
2.Described alumina ultrafine powder content accounts for 3% of described basal lamina material.
Prepare a preparation method for lithium ion battery separator material, comprise the following steps:
Step 1, carries out Homogeneous phase mixing by polyethylene and polyacrylic mixture and porous aluminum oxide superfine powder, obtains polyolefin blend;
Step 2, polyolefin blend carries out extruding in double screw extruder, cool, blank, and the melting co-extrusion temperature of extruder is 180 DEG C, and chilling temperature is 30 DEG C;
Step 3, the material secondary in double screw extruder got in step 2 is extruded, cool, blank, mixing, stretching compressing tablet, and the melting co-extrusion temperature of extruder is 180 DEG C, and chilling temperature is 30 DEG C;
Step 4, compressing tablet material applies the mixture of tetrafluoroethene and polytrifluorochloroethylene, dries;
Step 5, the compressing tablet material under oxygen atmosphere in plasma treatment step 4, obtains barrier film finished product.
The lithium ion battery separator material that embodiment 1-3 produces is tested: its closed pore temperature is 130-150 DEG C, and broken film temperature is more than 250 DEG C, and porosity reaches more than 60%, and pick up is more than 280%.The diaphragm material closed pore temperature that visible the present invention produces is low, broken film temperature is high, and high-temperature hot yield is low and pick up is high, and security performance is good, and the capacity of battery applications is large.
To be apparent for those skilled in the art to the multiple amendment of embodiment, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a lithium ion battery separator material, is characterized in that, comprises basal lamina material and coating, and described basal lamina material comprises polyolefin and porous aluminum oxide superfine powder; Described coating is fluoro-containing coating.
2. according to the lithium ion battery separator material described in claim 1, it is characterized in that, described polyolefin is one or both in polyethylene, polypropylene.
3. according to the lithium ion battery separator material described in claim 1, it is characterized in that, the granular size of porous aluminum oxide superfine powder is 3000 order-5000 orders, and pore size is 5-100nm, and hole density is 10
10-10
12individual/cm
2.
4. according to the lithium ion battery separator material described in claim 1 or 3, it is characterized in that, described alumina ultrafine powder content accounts for the 0.1-3% of described basal lamina material.
5. according to the lithium ion battery separator material described in claim 1, it is characterized in that, the fluorine material in described fluoro-containing coating is one or more combinations in polytetrafluoroethylene, polyvinylidene fluoride, polytrifluorochloroethylene.
6. prepare a preparation method for lithium ion battery separator material, it is characterized in that, comprise the following steps:
Step 1, alumina ultrafine powder and polyolefin carry out Homogeneous phase mixing, obtain polyolefin blend;
Step 2, polyolefin blend carries out extruding in double screw extruder, cool, blank, and the melting co-extrusion temperature of extruder is 130-180 DEG C, and chilling temperature is 5-30 DEG C;
Step 3, the material secondary in double screw extruder got in step 2 is extruded, cool, blank, mixing, stretching compressing tablet, and the melting co-extrusion temperature of double screw extruder is 130-180 DEG C, and chilling temperature is 5-30 DEG C;
Step 4, compressing tablet material applies fluoro-containing coating, dries;
Step 5, the compressing tablet material under oxygen atmosphere in plasma treatment step 4, obtains barrier film finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922541.4A CN105355813A (en) | 2015-12-14 | 2015-12-14 | Lithium ion battery diaphragm material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922541.4A CN105355813A (en) | 2015-12-14 | 2015-12-14 | Lithium ion battery diaphragm material and preparation method thereof |
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|---|---|
| CN105355813A true CN105355813A (en) | 2016-02-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510922541.4A Pending CN105355813A (en) | 2015-12-14 | 2015-12-14 | Lithium ion battery diaphragm material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471622A (en) * | 2021-06-25 | 2021-10-01 | 湖南中锂新材料有限公司 | Preparation method of lithium battery diaphragm |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190323A (en) * | 2010-02-25 | 2011-09-21 | 住友化学株式会社 | Inorganic oxide powder, slurry containing inorganic oxide, lithium ion secondary battery having the slurry and preparation method thereof |
| CN102315473A (en) * | 2011-06-28 | 2012-01-11 | 北京好风光储能技术有限公司 | Lithium ion flow redox battery |
| US20120015232A1 (en) * | 2010-01-13 | 2012-01-19 | Sony Corporation | Separator and nonaqueous electrolyte battery |
| CN202930456U (en) * | 2012-09-24 | 2013-05-08 | 深圳市冠力新材料有限公司 | Ultra-high molecular weight polyethylene composite polyoxyethylene and polyvinylidene fluoride composite membrane |
| CN103146018A (en) * | 2013-02-08 | 2013-06-12 | 上海中科高等研究院 | Preparation method of large-rate discharge porous diaphragm material and application of material |
| 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 |
| CN104262674A (en) * | 2014-08-26 | 2015-01-07 | 东莞新能源科技有限公司 | Preparation method of porous composite isolating membrane |
| CN104269507A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Novel lithium ion battery composite membrane and preparation method thereof |
-
2015
- 2015-12-14 CN CN201510922541.4A patent/CN105355813A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120015232A1 (en) * | 2010-01-13 | 2012-01-19 | Sony Corporation | Separator and nonaqueous electrolyte battery |
| CN102190323A (en) * | 2010-02-25 | 2011-09-21 | 住友化学株式会社 | Inorganic oxide powder, slurry containing inorganic oxide, lithium ion secondary battery having the slurry and preparation method thereof |
| CN102315473A (en) * | 2011-06-28 | 2012-01-11 | 北京好风光储能技术有限公司 | Lithium ion flow redox battery |
| CN202930456U (en) * | 2012-09-24 | 2013-05-08 | 深圳市冠力新材料有限公司 | Ultra-high molecular weight polyethylene composite polyoxyethylene and polyvinylidene fluoride composite membrane |
| CN103146018A (en) * | 2013-02-08 | 2013-06-12 | 上海中科高等研究院 | Preparation method of large-rate discharge porous diaphragm material and application of material |
| 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 |
| CN104262674A (en) * | 2014-08-26 | 2015-01-07 | 东莞新能源科技有限公司 | Preparation method of porous composite isolating membrane |
| CN104269507A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Novel lithium ion battery composite membrane and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471622A (en) * | 2021-06-25 | 2021-10-01 | 湖南中锂新材料有限公司 | Preparation method of lithium battery diaphragm |
| CN113471622B (en) * | 2021-06-25 | 2022-08-05 | 湖南中锂新材料有限公司 | Preparation method of lithium battery diaphragm |
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Application publication date: 20160224 |
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