CN104466065A - Lithium battery diaphragm - Google Patents
Lithium battery diaphragm Download PDFInfo
- Publication number
- CN104466065A CN104466065A CN201410806915.1A CN201410806915A CN104466065A CN 104466065 A CN104466065 A CN 104466065A CN 201410806915 A CN201410806915 A CN 201410806915A CN 104466065 A CN104466065 A CN 104466065A
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- battery diaphragm
- percent
- woven substrate
- nano
- Prior art date
- 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.)
- Pending
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Classifications
-
- 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
-
- 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
-
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a lithium battery diaphragm. The lithium battery diaphragm comprises a nonwoven fabric base layer and polyethylene film layers which are pressed onto the upper surface and the lower surface of the nonwoven fabric base layer, wherein pores are uniformly distributed in the surface of the lithium battery diaphragm, the porosity is 72 to 78 percent, the nonwoven fabric base layer is made of nano ceramic composite fibers, and the anti-abrasion ceramic composite fiber comprises the following ingredients by weight percent: 15 to 20 percent of nano ceramic powder, 10 to 15 percent of polypropylene, 2 to 5 percent of dispersing agent and the balance of solvent. By adopting the structure, the lithium battery diaphragm has characteristics of high porosity, low thickness, high liquid absorption amount and low resistance, so that the lithium battery is high in capacity and long in service life.
Description
Technical field
The present invention relates to field of lithium, particularly relate to a kind of lithium battery diaphragm.
Background technology
Lithium ion battery is high with its energy density, have extended cycle life and the electrical property and obtaining of the high excellence of voltage develops rapidly, be widely used in the electronics field such as mobile phone, portable computer, camera, video camera at present, and application is still among constantly expanding.Lithium ion battery is made up of both positive and negative polarity, electrolyte and barrier film.Barrier film be lithium ion battery key in one of layer assembly, major function is isolation both positive and negative polarity and stops electronics to pass, and ion can be allowed to pass through simultaneously, thus complete the fast transport of lithium ion between both positive and negative polarity in charge and discharge process.
Quality due to membrane properties directly affects the security performance that the internal resistance of cell, discharge capacity, service life cycle and battery use, therefore the coherence request of lithium battery manufacture to diaphragm material product is high, except thickness, superficial density, these basic demands of mechanical property, also there is very high requirement to the size of diaphragm micro-hole and the homogeneity of distribution.
Existing barrier film manufacture process mesopore rate is difficult to control, and there will be the phenomenon that micropore diminishes in using, and membrane thicknesses is thicker simultaneously, such that the capacity of lithium battery is low, useful life is short.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of lithium battery diaphragm, has high porosity, low thickness, high liquid absorption, low-resistance characteristic, makes that lithium battery capacity is high, long service life.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of lithium battery diaphragm, comprise non-woven substrate, be pressed together on the film layer of described non-woven substrate upper and lower surface, the surface of described lithium battery diaphragm is evenly equipped with micropore, its porosity is 72-78%, described non-woven substrate is made up of nano ceramics composite fibre, and the composition of described wear-resistant ceramic composite fibre and the quality proportioning shared by each composition are: nano-ceramic powder 15%-20%, polypropylene 10%-15%, dispersant 2%-5%, all the other are solvent.
In a preferred embodiment of the present invention, described nano-ceramic powder is the mixture of titanium dioxide and zinc oxide.
In a preferred embodiment of the present invention, the thickness of described non-woven substrate is 5-8 μm.
In a preferred embodiment of the present invention, the thickness of described film layer is 1-3 μm.
The invention has the beneficial effects as follows: barrier film of the present invention is that the nonwoven layer be made up of nano ceramics composite fibre and film layer are composited, there is high porosity, low thickness, high liquid absorption, low-resistance characteristic, make that lithium battery capacity is high, long service life.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Embodiment one:
A kind of lithium battery diaphragm, comprise non-woven substrate, be pressed together on the film layer of described non-woven substrate upper and lower surface, the surface of described lithium battery diaphragm is evenly equipped with micropore, its porosity is 72-78%, described non-woven substrate is made up of nano ceramics composite fibre, and the composition of described wear-resistant ceramic composite fibre and the quality proportioning shared by each composition are: nano-ceramic powder 15%, polypropylene 10%, water-soluble organic silicon 2%, ethanol 73%.
Wherein, described nano-ceramic powder is the mixture of titanium dioxide and zinc oxide.
The thickness of described non-woven substrate is 5 μm.
The thickness of described film layer is 2 μm.
Embodiment two:
A kind of lithium battery diaphragm, comprise non-woven substrate, be pressed together on the film layer of described non-woven substrate upper and lower surface, the surface of described lithium battery diaphragm is evenly equipped with micropore, its porosity is 72-78%, described non-woven substrate is made up of nano ceramics composite fibre, and the composition of described wear-resistant ceramic composite fibre and the quality proportioning shared by each composition are: nano-ceramic powder 20%, polypropylene 15%, water-soluble organic silicon 5%, ethanol 60%.
Wherein, described nano-ceramic powder is the mixture of titanium dioxide and zinc oxide.
The thickness of described non-woven substrate is 8 μm.
The thickness of described film layer is 1 μm.
Present invention is disclosed a kind of lithium battery diaphragm, be that the nonwoven layer be made up of nano ceramics composite fibre and film layer are composited, there is high porosity, low thickness, high liquid absorption, low-resistance characteristic, make that lithium battery capacity is high, long service life.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a lithium battery diaphragm, it is characterized in that, comprise non-woven substrate, be pressed together on the film layer of described non-woven substrate upper and lower surface, the surface of described lithium battery diaphragm is evenly equipped with micropore, its porosity is 72-78%, described non-woven substrate is made up of nano ceramics composite fibre, and the composition of described wear-resistant ceramic composite fibre and the quality proportioning shared by each composition are: nano-ceramic powder 15%-20%, polypropylene 10%-15%, dispersant 2%-5%, all the other are solvent.
2. lithium battery diaphragm according to claim 1, is characterized in that, described nano-ceramic powder is the mixture of titanium dioxide and zinc oxide.
3. lithium battery diaphragm according to claim 1, is characterized in that, the thickness of described non-woven substrate is 5-8 μm.
4. lithium battery diaphragm according to claim 1, is characterized in that, the thickness of described film layer is 1-3 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410806915.1A CN104466065A (en) | 2014-12-23 | 2014-12-23 | Lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410806915.1A CN104466065A (en) | 2014-12-23 | 2014-12-23 | Lithium battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104466065A true CN104466065A (en) | 2015-03-25 |
Family
ID=52911771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410806915.1A Pending CN104466065A (en) | 2014-12-23 | 2014-12-23 | Lithium battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104466065A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304846A (en) * | 2015-11-10 | 2016-02-03 | 天能电池集团有限公司 | Composite non-woven fabric ceramic diaphragm for lithium ion battery and preparation method thereof |
| CN105374969A (en) * | 2015-10-28 | 2016-03-02 | 惠州市吉美泰电子科技有限公司 | Lithium battery diaphragm with interlayer, lithium battery and manufacturing method of lithium battery diaphragm |
| CN108140787A (en) * | 2015-08-17 | 2018-06-08 | 赛尔格有限责任公司 | Improved battery separator and correlation technique |
| CN109728232A (en) * | 2018-12-13 | 2019-05-07 | 银隆新能源股份有限公司 | Composite diaphragm for lithium ion battery and preparation method thereof |
-
2014
- 2014-12-23 CN CN201410806915.1A patent/CN104466065A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108140787A (en) * | 2015-08-17 | 2018-06-08 | 赛尔格有限责任公司 | Improved battery separator and correlation technique |
| CN105374969A (en) * | 2015-10-28 | 2016-03-02 | 惠州市吉美泰电子科技有限公司 | Lithium battery diaphragm with interlayer, lithium battery and manufacturing method of lithium battery diaphragm |
| CN105304846A (en) * | 2015-11-10 | 2016-02-03 | 天能电池集团有限公司 | Composite non-woven fabric ceramic diaphragm for lithium ion battery and preparation method thereof |
| CN109728232A (en) * | 2018-12-13 | 2019-05-07 | 银隆新能源股份有限公司 | Composite diaphragm for lithium ion battery and preparation method thereof |
| CN109728232B (en) * | 2018-12-13 | 2022-12-20 | 银隆新能源股份有限公司 | Composite diaphragm for lithium ion battery and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |