CN206849946U - A kind of plastics non-woven fabrics collector - Google Patents
A kind of plastics non-woven fabrics collector Download PDFInfo
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- CN206849946U CN206849946U CN201720391254.XU CN201720391254U CN206849946U CN 206849946 U CN206849946 U CN 206849946U CN 201720391254 U CN201720391254 U CN 201720391254U CN 206849946 U CN206849946 U CN 206849946U
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- woven fabrics
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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 a kind of plastics non-woven fabrics collector, and it has sandwich construction, including plastics non-woven membrane, and bonding force enhancement layer, the coat of metal and antioxidation coating are coated with successively on the upper and lower surface of the plastics non-woven fabrics；The coat of metal is copper metal coating or aluminum metal coating；The plastics non-woven membrane surface distributed the 0.06mm of diameter 0.02 micropore, and porosity is 40% 50%.The utility model can realize the lightweight of battery, improve energy density and charge/discharge rate property, reduce cost, and can make copper facing/aluminium lamination do not allow it is easy to fall off, do not allow it is oxidizable.
Description
Technical field
It the utility model is related to a kind of plastics non-woven fabrics collector.
Background technology
Conventional lithium ion battery negative current collector is copper foil, and plus plate current-collecting body is aluminium foil.With the development of lithium power technology, lithium
High-energy-density, lightweight and the flexibility of ion battery turn into the pursuit of people.Thinned copper/aluminium foil be (both positive and negative polarity collector
Gross mass accounts for 14%-18% of battery gross mass or so), the lightweight of lithium ion battery can be achieved, improve energy density, drop
Low cost, but due to the limitation of technology of preparing, the thickness of copper/aluminium foil be difficult reduce again (at present copper foil can volume production to 6 μm, aluminium foil
Can volume production to 8 μm)；After other copper/aluminium foil is thinning, mechanical strength reduces, and causes processing characteristics to reduce, it is therefore desirable to new
" thinning technique ".
Prior art, which has, is plated in copper/aluminium on plastics (such as PET) as collector to improve battery energy density, reduce
Cost, allow battery lightweight.But its copper-plated most thick degree is 1.5 μm, and the most thick degree aluminized is 2.0 μm of (either copper facing
Still aluminize, be required to certain thickness to reach gratifying electric conductivity), this is relative to conventional packaging material copper facing/aluminium
It is thick many for film thickness of coating, and coating is thicker, copper facing/aluminium lamination is easier to come off from plastics.
The surface of copper/aluminium foil needs to carry out anti-oxidation processing, because copper/aluminium foil directly contacts with negative pole/positive electrode, when
Between it is long after, can be by electrolytic corrosion, so as to reduce the service life of lithium ion battery.In addition, it has been found that plastic plating copper/
After aluminium, then traditional anti-oxidation method is used easily to cause coming off for copper/aluminium coat.
Utility model content
In view of this, to overcome above-mentioned technical problem, the purpose of this utility model is that battery can be realized by providing one kind
Lightweight, improve energy density, reduce cost, and can make copper facing/aluminium lamination do not allow it is easy to fall off, do not allow oxidizable plastics nonwoven
Cloth collector.
Used technical scheme is：
A kind of plastics non-woven fabrics collector, it has sandwich construction, including plastics non-woven membrane, in the plastics non-woven fabrics
The upper and lower surface of film is coated with bonding force enhancement layer, the coat of metal and antioxidation coating successively；The coat of metal is copper metal coating
Or aluminum metal coating；The non-woven membrane surface distributed diameter 0.02-0.06mm micropore, porosity 40%-50%.
Further, the plastics non-woven membrane is PI, PET, PP with plastics.
Further, the thickness of the plastics non-woven membrane is 8-15 μm.
Further, the bonding force enhancement layer is metal coating or nonmetallic plated film, when for metal coating when, the gold
Belong to for Ni；When for nonmetallic plated film when, it is described it is nonmetallic be SiC, Si3N4Or Al2O3。
Further, the thickness of the bonding force enhancement layer is 10-100nm.
Further, the thickness of the copper metal coating is 100-1000nm
Further, the thickness of the aluminum metal coating is 100-2000nm.
Further, the antioxidation coating is fine and close metal level or non-metallic layer, when for metal level when, the metal is
Ni；When for non-metallic layer when, it is described it is nonmetallic be Al2O3、Si3N4Or SiC.
Further, the thickness of the antioxidation coating is 10-100nm.
The beneficial effects of the utility model are,
(1) loss of weight is realized by plastics non-woven fabrics film layer, wherein aluminizer collector can realize loss of weight 50%, and thickness reduces
30%, copper plating film collector can realize loss of weight 70%, significantly improve battery energy density；
(2) plastics non-woven membrane has stronger tensile strength as substrate so that the tension force in preparation section, pressure etc.
Window can be bigger, and so as to stock up, section can use higher pressure to realize bigger compacted density, improve process manufacturing capacity；
(3) last layer bonding force enhancement layer is plated, coming off for copper/aluminum metal coating can be reduced；Copper/aluminum metal can effectively be prevented
Coating, which easily comes off, causes the performance of collector to be lost；
(4) copper foil current collector in original lithium battery is substituted with this new copper plastics non-woven fabrics collector, by traditional 6
μm pure copper foil be reduced to copper plate less than 1 μm, the dosage of copper greatly reduces, and collector cost can reduce by 50%.
(5) antioxidation coating obtained by the way of plated film, can solve the problems, such as that copper/aluminium coat comes off on plastics, simultaneously
Reach anti-oxidation purpose.
(6) this plastics non-woven fabrics collector, it can improve both positive and negative polarity compacting, portion of material is filled between hole；
(7) because the microcellular structure of plastics non-woven fabrics collector, the diffusion mobility of lithium ion are become by traditional two-dimensional directional
Penetrated into comprehensive, and enter the contact surface increase of interpore both positive and negative polarity active material and collector, reduced lithium ion and move
Radius is moved, improves the high rate performance of lithium ion battery；
(8) this plastics non-woven fabrics collector can effectively reduce internal resistance compared with traditional copper/aluminum foil current collector；
(9) this non-woven fabrics with microcellular structure is remarkably improved the bonding force of base material and the coat of metal；
(10) this non-woven fabrics with microcellular structure is advantageous to the infiltration of electrolyte again in itself, in cell processing course
The speed of fluid injection process can be improved, the abundant infiltration and can of electrolyte accelerates the percent of pass of lithium ion after battery is processed into,
So as to further carry lithium battery high rate performance.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of plastics non-woven fabrics collector of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model preferred embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Shown in Figure 1, a kind of plastics non-woven fabrics collector, it has sandwich construction, including plastics non-woven fabrics 1, in institute
The upper and lower surface for stating plastics non-woven fabrics 1 is coated with bonding force enhancement layer 2, the coat of metal 3 and antioxidation coating 4 successively；The metal-plated
Layer 3 is copper metal coating or aluminum metal coating；The non-woven membrane surface distributed diameter 0.02-0.06mm micropore, hole
Rate is 40%-50%.
Plastics non-woven fabrics collector can be used in lithium ion battery, and its most basic function is to collect electric current, while conduct
Carrier deposits positive and negative pole material, i.e., electric current caused by positive and negative pole material (cell active materials) is collected so as to formed compared with
Big current versus output.Wherein, positive pole (is applied by plastics non-woven fabrics collector and the positive active material for participating in chemically reacting
Cover on a current collector) form.Negative pole is by plastics non-woven fabrics collector and participates in the negative electrode active material (coating to chemically react
Form on a current collector).
This has the plastics non-woven fabrics collector of microcellular structure, in a first aspect, can improve both positive and negative polarity compacting, portion of material
It is filled between hole；Second aspect, compared with traditional copper/aluminum foil current collector, it can effectively reduce internal resistance；The third aspect, this nothing
The bonding force of base material and the coat of metal can be improved by spinning cloth structure；Fourth aspect, nonwoven fabric construct are advantageous to electrolyte again in itself
Infiltration, the speed of fluid injection process can be improved in cell processing course, the abundant infiltration of electrolyte is again after battery is processed into
The percent of pass of lithium ion can be accelerated, so as to further carry lithium battery high rate performance；5th aspect, due to plastics non-woven fabrics collector
Microcellular structure, the diffusion mobility of lithium ion becomes comprehensive by traditional two-dimensional directional and penetrates, and enters interpore positive and negative
The increase of the contact surface of pole active material and collector, reduces lithium ion mobility radius, improves the high rate performance of lithium ion battery.
The preparation method of non-woven membrane can be as follows, illustrates by taking PET film as an example：PET and auxiliary agent are added
Into water, using hydrabrusher pulping (discongesting fiber, to be prepared for mashing) and mashing, then evolved and screened
(removing fiber impurity and non-fiber impurity, improve stock quality and protection equipment), after dilution by slurry continuously
It is delivered on forming net (titled net formation device), water and some subtitle substances are flowed away realization dehydration by shaping mesh, stay in shaping
Online fibrous layer constantly thickens.Reinforce to obtain PET non-woven membranes using Hot rolling after wet-formed.
Loss of weight is realized by plastics non-woven fabrics film layer, wherein aluminizer collector can realize loss of weight 50%, and thickness reduces
30%, copper plating film collector can realize loss of weight 70%, significantly improve battery energy density.Plastics for preparing non-woven fabrics are preferred
For OPP, PI, PET, CPP or PVC.Wherein OPP is orientation stretching polypropylene plastics；PI is polyimide plastic；PET is poly- pair
PET plastics, CPP are cast polypropylene plastics, PVC is igelite.Further preferred PET, PI,
CPP；120-300 DEG C of the temperature tolerance of plastics non-woven fabrics；The thickness of plastics non-woven fabrics is preferably 8-15 μm, is copper for the coat of metal
The coat of metal, the thickness of plastics non-woven fabrics can be more preferably 4-8 μm；It is aluminum metal coating for the coat of metal, plastics
The thickness of non-woven fabrics can be more preferably 6-10 μm.
Last layer bonding force enhancement layer is plated, coming off for the coat of metal can be reduced, effectively can prevent the coat of metal from easily coming off
The performance of collector is caused to be lost.The bonding force enhancement layer is preferably metal coating or nonmetallic plated film, when for metal coating when,
The metal is Ni；When for nonmetallic plated film when, it is described it is nonmetallic be SiC, Si3N4Or Al2O3.When the coat of metal is copper metal
During coating, bonding force enhancement layer preferred Ni or Al2O3, Ni or Al2O3With the adhesive property of plastic film layers and copper metal coating compared with
Good, such copper plate is less easy to fall off.When the coat of metal is aluminum metal coating, the preferred Al of bonding force enhancement layer2O3, Al2O3With
The adhesive property of plastic film layers and aluminum metal coating is preferable, and such aluminium coated is less easy to fall off.The thickness of bonding force enhancement layer
Preferably 10-100nm, more preferably 10-50nm.
The thickness of copper metal coating can be 100-1000nm, more preferably 200-600nm；The thickness of aluminum metal coating
Can be 100-2000nm, more preferably 500-1000nm.
The effect of antioxidation coating or purpose are to prevent copper/aluminum metal coating to be oxidized.Antioxidation coating can be fine and close
Metal level or non-metallic layer, when for metal level when, the metal is Ni；More preferably Ni；When for non-metallic layer when, institute
It is Al to state nonmetallic2O3、Si3N4Or SiC, more preferably Al2O3., can when obtaining antioxidation coating by the way of plated film
Further solve the problems, such as that copper/aluminium coat comes off on plastics, while reach anti-oxidation purpose.The thickness of antioxidation coating can be
10-100nm, can be more preferably 10-50nm.
The beneficial effects of the utility model can be found in utility model content part, and here is omitted.
The a series of detailed description of those listed above is only for the specific of possible embodiments of the present utility model
Illustrate, they simultaneously be not used to limit the scope of protection of the utility model, it is all without departing from the utility model skill spirit made etc.
Effect embodiment or change should be included within the scope of protection of the utility model.
Claims (8)
- A kind of 1. plastics non-woven fabrics collector, it is characterised in that it has sandwich construction, including plastics non-woven membrane, thereon, Lower surface is coated with bonding force enhancement layer, the coat of metal and antioxidation coating successively；The coat of metal is copper metal coating or aluminium gold Belong to coating；The plastics non-woven membrane surface distributed diameter 0.02-0.06mm micropore, porosity 40%-50%.
- 2. plastics non-woven fabrics collector according to claim 1, it is characterised in that the plastics non-woven membrane is with plastics PI、PET、CPP。
- 3. plastics non-woven fabrics collector according to claim 1, it is characterised in that the thickness of the plastics non-woven fabrics is 8- 15μm。
- 4. plastics non-woven fabrics collector according to claim 1, it is characterised in that the bonding force enhancement layer is metal-plated Film or nonmetallic plated film, when for metal coating when, the metal is Ni；When for nonmetallic plated film when, it is described it is nonmetallic for SiC, Si3N4Or Al2O3。
- 5. plastics non-woven fabrics collector according to claim 1, it is characterised in that the thickness of the bonding force enhancement layer is 10-100nm。
- 6. plastics non-woven fabrics collector according to claim 1, it is characterised in that the thickness of the copper metal coating is 100-1000nm, the thickness of aluminum metal coating is 100-2000nm.
- 7. plastics non-woven fabrics collector according to claim 1, it is characterised in that the antioxidation coating is fine and close metal Layer or non-metallic layer, when for metal level when, the metal is Ni；When for non-metallic layer when, it is described it is nonmetallic be Al2O3、Si3N4 Or SiC.
- 8. plastics non-woven fabrics collector according to claim 1, it is characterised in that the thickness of the antioxidation coating is 10- 100nm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720391254.XU CN206849946U (en) | 2017-04-14 | 2017-04-14 | A kind of plastics non-woven fabrics collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720391254.XU CN206849946U (en) | 2017-04-14 | 2017-04-14 | A kind of plastics non-woven fabrics collector |
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| Publication Number | Publication Date |
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| CN206849946U true CN206849946U (en) | 2018-01-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108417841A (en) * | 2018-02-09 | 2018-08-17 | 深圳前海优容科技有限公司 | Battery, battery battery core, collector and preparation method thereof |
| CN110190344A (en) * | 2019-06-13 | 2019-08-30 | 深圳市寒暑科技新能源有限公司 | A kind of flexibility water system Zinc ion battery |
| WO2022061612A1 (en) * | 2020-09-23 | 2022-03-31 | 宁德新能源科技有限公司 | Composite current collector, electrode plate, and electrochemical device |
| WO2023206688A1 (en) * | 2022-04-25 | 2023-11-02 | 江阴纳力新材料科技有限公司 | Composite current collector and preparation method therefor, and electrode plate and secondary battery |
-
2017
- 2017-04-14 CN CN201720391254.XU patent/CN206849946U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108417841A (en) * | 2018-02-09 | 2018-08-17 | 深圳前海优容科技有限公司 | Battery, battery battery core, collector and preparation method thereof |
| CN108417841B (en) * | 2018-02-09 | 2021-08-03 | 深圳前海优容科技有限公司 | Battery, battery cell, current collector and preparation method thereof |
| CN110190344A (en) * | 2019-06-13 | 2019-08-30 | 深圳市寒暑科技新能源有限公司 | A kind of flexibility water system Zinc ion battery |
| WO2022061612A1 (en) * | 2020-09-23 | 2022-03-31 | 宁德新能源科技有限公司 | Composite current collector, electrode plate, and electrochemical device |
| WO2023206688A1 (en) * | 2022-04-25 | 2023-11-02 | 江阴纳力新材料科技有限公司 | Composite current collector and preparation method therefor, and electrode plate and secondary battery |
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| TR01 | Transfer of patent right |
Effective date of registration: 20181127 Address after: 352100 Xingang Road, Zhangwan Town, Jiaocheng District, Ningde, Fujian 2 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 232200 East Side of Xinqiao Avenue, Shouxian International Industrial Park, Huainan City, Anhui Province Patentee before: ANHUI JINMEI NEW MATERIAL TECHNOLOGY Co.,Ltd. |