CN202888277U - Ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries - Google Patents
Ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries Download PDFInfo
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- CN202888277U CN202888277U CN201220487918XU CN201220487918U CN202888277U CN 202888277 U CN202888277 U CN 202888277U CN 201220487918X U CN201220487918X U CN 201220487918XU CN 201220487918 U CN201220487918 U CN 201220487918U CN 202888277 U CN202888277 U CN 202888277U
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- diaphragm
- high molecular
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- composite diaphragm
- polyoxyethylene
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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
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Abstract
The utility model discloses an ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries. The ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries is prepared by uniformly coating alumina and polyoxyethylene on the diaphragm. The upper and lower surfaces of an ultra-high molecular-weight polyethylene diaphragm are respectively provided with a polyoxyethylene hydrophilic layer; and the surface of each polyoxyethylene hydrophilic layer is provided with an alumina coating layer, and because alumina has chemical properties and has oxidation resistance, the chemical stability of the diaphragm can be effectively improved, and the performance stability of the diaphragm can be ensured. The adopted polyoxyethylene coating can effectively improve the hydrophily of the surface of the diaphragm, and the alumina coating layers can improve the corrosion resistance, high temperature resistance, chemical stability and stability of the diaphragm. When the composite diaphragm works in an electrolyte corrosion environment of batteries, the stability of high temperature resistance of the diaphragm can be kept, thereby extending the service life of batteries, and improving the battery performances.
Description
Technical field
The utility model belongs to technical field of lithium batteries, relates in particular to a kind of High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm.
Background technology
Polyethylene is one of maximum, most widely used plastics variety of current production rate, accounts for 30% of world's plastics total output.Wherein, LDPE, HDPE and be called as the poly LLDPE of the third generation etc. and all belong to the thermoplasticity general-purpose plastics have molecular weight only up to the UHMWPE more than 1,500,000, use as engineering plastics because physical and mechanical property is excellent.The high molecular weight (molecular weight of HDPE only has 2～300,000 usually) of UHMWPE is given its excellent serviceability, and belong to thermoplastic engineering plastic moderate, function admirable, it has almost concentrated the advantage of various plastics, the combination property such as have unrivaled wear-resisting, shock-resistant, the self-lubricating of common polythene and other engineering plastics, corrosion-resistant, impact-absorbing energy, low temperature resistant, health is nontoxic, be difficult for adhering to, be difficult for suction, density is less.In fact, also there is not a kind of simple macromolecular material to have so numerous excellent properties concurrently at present.Barrier film main function in battery material is that isolated both positive and negative polarity is to prevent the problems such as battery self discharging and the two poles of the earth short circuit, the lithium ion battery separator material can be divided into: weave film, nowoven membrane (nonwoven fabrics), microporous barrier, composite membrane, diaphragm paper, several classes such as laminate, but owing to be full of the corrosion of electrolyte and the variation of temperature in the operational environment of battery, so when long-term the use, the stability in use of above-mentioned various lithium battery diaphragms is relatively poor, is unfavorable for the use of the long-term stability of battery.
The utility model content
In order to overcome the above problems, present case adopts paint-on technique to make a kind of composite diaphragm---High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm, by evenly being coated on aluminium oxide and polyoxyethylene on the barrier film, and the control coating thickness is beneficial to the application of heavy-duty battery, makes the high-performance lithium battery with high temperature resistant ultra high molecular polyethylene composite diaphragm.
The utility model is to realize like this, a kind of High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm, it is characterized in that, be provided with micropore on the described ultra high molecular polyethylene barrier film, ultra high molecular polyethylene barrier film upper and lower surface is provided with the polyoxyethylene hydrophilic layer, and polyoxyethylene hydrophilic layer surface is provided with the alumina coated layer.
Further, described micropore 11 apertures employing 0.026-0.038 μ m.
Further, described polyethylene membrane thicknesses adopts 12-38 μ m.
But the hydrophilic nmature of the polyoxyethylene coat Effective Raise membrane surface that the utility model adopts, alumina coated layer can improve corrosion-resistant, resistance to elevated temperatures, chemical stability and the stability of barrier film.When this composite diaphragm is worked in the electrolyte corrosive environment of battery, can keep the stability of good heat-resisting quantity, thereby prolong the useful life of battery, improve battery performance.
Description of drawings
Fig. 1 is the High Temperature Lithium Cell that provides of the utility model with the structural representation of ultra high molecular polyethylene composite diaphragm.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that described herein concrete
Embodiment is only in order to explaining the utility model, and is not used in restriction the utility model.
The High Temperature Lithium Cell that Fig. 1 shows the utility model the to be provided structure of ultra high molecular polyethylene composite diaphragm.For convenience of explanation, only show the part relevant with the utility model.
Be provided with micropore 11 on the ultra high molecular polyethylene barrier film 1, ultra high molecular polyethylene barrier film 1 upper and lower surface is provided with polyoxyethylene hydrophilic layer 2, and polyoxyethylene hydrophilic layer 2 surfaces are provided with alumina coated layer 3.Be provided with micropore 11 at ultra high molecular polyethylene barrier film 1,0.026-0.038 is adopted in micropore 11 apertures, and the polyethylene membrane thicknesses adopts 12-38; Upper and lower surface at ultra high molecular polyethylene barrier film 1 is respectively arranged with polyoxyethylene hydrophilic layer 2; Be provided with alumina coated layer 3 on polyoxyethylene hydrophilic layer 2 surfaces, because aluminium oxide is a chemistry character tool non-oxidizability, but the chemical stability of Effective Raise barrier film guarantees that membrane properties is stable.
The High Temperature Lithium Cell that the utility model provides ultra high molecular polyethylene composite diaphragm utilizes aluminium oxide and polyoxyethylene evenly to be coated on the barrier film, makes High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm.Be provided with micropore 11 at ultra high molecular polyethylene barrier film 1,0.026-0.038 is adopted in the aperture of micropore 11, and the polyethylene membrane thicknesses adopts 12-38; Upper and lower surface at ultra high molecular polyethylene barrier film 1 is respectively arranged with polyoxyethylene hydrophilic layer 2; Be provided with alumina coated layer 3 on polyoxyethylene hydrophilic layer 2 surfaces, because aluminium oxide is a chemistry character tool non-oxidizability, but the chemical stability of Effective Raise barrier film guarantees that membrane properties is stable.
But the hydrophilic nmature of the polyoxyethylene coat Effective Raise membrane surface that adopts, alumina coated layer can improve corrosion-resistant, resistance to elevated temperatures, chemical stability and the stability of barrier film.When this composite diaphragm is worked in the electrolyte corrosive environment of battery, can keep the stability of good heat-resisting quantity, thereby prolong the useful life of battery, improve battery performance.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (3)
1. High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm, it is characterized in that, be provided with micropore on the described ultra high molecular polyethylene barrier film, ultra high molecular polyethylene barrier film upper and lower surface is provided with the polyoxyethylene hydrophilic layer, and polyoxyethylene hydrophilic layer surface is provided with the alumina coated layer.
2. High Temperature Lithium Cell as claimed in claim 1 ultra high molecular polyethylene composite diaphragm is characterized in that, 0.026-0.038 μ m is adopted in described micropore (11) aperture.
3. High Temperature Lithium Cell as claimed in claim 1 ultra high molecular polyethylene composite diaphragm is characterized in that, described polyethylene membrane thicknesses adopts 12-38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220487918XU CN202888277U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220487918XU CN202888277U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888277U true CN202888277U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220487918XU Expired - Fee Related CN202888277U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene composite diaphragm for high-temperature lithium-ion batteries |
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| CN (1) | CN202888277U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021248776A1 (en) * | 2020-06-09 | 2021-12-16 | 江苏厚生新能源科技有限公司 | Coated separator having low-temperature shutoff performance and preparation method therefor, lithium battery and automobile |
-
2012
- 2012-09-24 CN CN201220487918XU patent/CN202888277U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021248776A1 (en) * | 2020-06-09 | 2021-12-16 | 江苏厚生新能源科技有限公司 | Coated separator having low-temperature shutoff performance and preparation method therefor, lithium battery and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20180924 |