CN208336378U - A kind of paper base composite construction and battery - Google Patents
A kind of paper base composite construction and battery Download PDFInfo
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- CN208336378U CN208336378U CN201820407846.0U CN201820407846U CN208336378U CN 208336378 U CN208336378 U CN 208336378U CN 201820407846 U CN201820407846 U CN 201820407846U CN 208336378 U CN208336378 U CN 208336378U
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- metal
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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
Abstract
The utility model discloses a kind of paper base composite construction and batteries, which includes paper substrates, are successively coated with bonding force enhancement layer and the coat of metal respectively in the upper and lower surfaces of the paper substrates.The utility model had both been able to achieve the lightweight of battery, improves energy density, and the coat of metal can be made not easy to fall off, can also realize under same compacted density, lower elongation.
Description
Technical field
The utility model relates to technical field of lithium ion more particularly to a kind of paper base composite constructions and battery.
Background technique
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 become the pursuit of people.Thinned copper/aluminium foil be (positive and negative anodes collector
Gross mass accounts for about the 14%-18% or so of battery gross mass), it can be achieved that lithium ion battery lightweight, improve energy density, drop
Low cost, but due to the limitation of technology of preparing, copper/aluminium foil thickness be difficult to reduce again (at present copper foil can volume production to 6 μm, aluminium foil
Can volume production to 8 μm)；In addition after copper/aluminium foil is thinning, mechanical strength is reduced, and processing performance is caused to reduce, it is therefore desirable to new
" thinning technique ".
The prior art, which has for copper/aluminium to be plated on plastics (such as PET) as collector, to be improved battery energy density, reduces
Cost realizes the light-weighted effect of battery.However using plastics material rate higher, higher elongation is easily deformed.
When copper/aluminium is plated on plastics as collector, it is copper-plated it is most thick with a thickness of 1.5 μm, aluminize it is most thick with a thickness of
2.0 μm (either copper facing is still aluminized, and is required to certain thickness to reach satisfactory electric conductivity), this is relative to tradition
Want thick many for packaging material copper facing/aluminium film thickness of coating, and coating is thicker, copper facing/aluminium layer is easier to fall off from plastics.
Utility model content
In view of this, the purpose of this utility model is to provide one kind to be both able to achieve battery to overcome above-mentioned technical problem
Lightweight, and the coat of metal can be made not easy to fall off, improve energy density, reduce the paper base composite construction and battery of cost.
One side according to the present utility model provides a kind of paper base composite construction, which is characterized in that including paper substrates,
It is successively coated with bonding force enhancement layer and the coat of metal respectively in the upper and lower surfaces of the paper substrates.
Further, the outside of the coat of metal is also coated with antioxidation coating.
Further, the coat of metal is copper metal coating or aluminum metal coating.
Further, the paper substrates with a thickness of 2-12 μm.
Further, the paper substrates are super thin fiber paper, graphite paper or nanometer paper.
Further, the bonding force enhancement layer is metal coating or nonmetallic plated film.
Further, when the coat of metal is copper metal coating, the bonding force enhancement layer is Zn, Ni, Sn or Fe
Metal coating, or be the nonmetallic plated film of SiC, Si3N4, SiO2, Al2O3 or SiO.
Further, when the coat of metal is aluminum metal coating, the bonding force enhancement layer is Ni metal coating, or
For the nonmetallic plated film of SiC, Si3N4 or Al2O3.
Further, the bonding force enhancement layer with a thickness of 10-100nm.
Further, the copper metal coating with a thickness of 100-1000nm；Or the aluminum metal coating with a thickness of
100-2000nm。
Further, the antioxidation coating is metal layer or non-metallic layer.
Further, when the coat of metal is copper metal coating, the antioxidation coating be fine and close Al, Fe, Ni, Zn or
Ti metal layer, or be Fe2O3, Al2O3, Si3N4, SiC or SiO2 non-metallic layer.
Further, when the coat of metal is aluminum metal coating, the antioxidation coating is fine and close Ni metal layer, or
For Al2O3, Si3N4 or SiC non-metallic layer.
Further, the antioxidation coating with a thickness of 10-100nm.
Another aspect according to the present utility model, provides a kind of battery, the battery using it is as described above any one
Paper base composite construction is as electrode.
The beneficial effects of the utility model at least that:
(1) by realizing loss of weight using super thin fiber paper, graphite paper or nanometer paper etc. as paper substrates, wherein to aluminize
, it can be achieved that loss of weight 70%, thickness reduce by 45% for film collector, it can be achieved that loss of weight 75%, shows by taking copper plating film collector as an example
It writes and improves battery energy density；
(2) the paper base composite construction using super thin fiber paper, graphite paper or nanometer paper etc. as paper substrates, in compacted density
For 3.5-3.6g/cm3In the case where, elongation elongation of aluminium foil or copper foil at 0.2%-0.5%, square one is all larger than
0.7%；It is, the elongation of paper base composite construction is lower in the case where realizing the compacted density needed.
(3) paper bases such as super thin fiber paper, graphite paper or nanometer paper, can be with one layer of bonding force enhancing on direct plating without punching
Layer, falls off so as to reduce copper/aluminum metal coating, and copper/aluminum metal coating is easy to fall off can be effectively prevent to lead to collector
Performance is lost.
(4) paper bases such as super thin fiber paper, graphite paper or nanometer paper are conducive to the infiltration of electrolyte, in cell processing course
The speed that fluid injection process can be improved, the abundant infiltration of electrolyte can accelerate the percent of pass of lithium ion again after being processed into battery,
To further mention lithium battery high rate performance.
(5) antioxidation coating obtained by the way of plated film, the problem of copper/aluminium coat can be further prevented to fall off, simultaneously
Achieve the purpose that anti-oxidation.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 shows the schematic diagram of the paper base composite construction according to an embodiment of the present invention.
Fig. 2 shows the schematic diagrames according to the paper base composite construction of an embodiment of the present invention.
Fig. 3 shows the schematic diagram of the paper base composite construction according to an embodiment of the present invention.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only the utility model preferred embodiment, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 shows the schematic diagram of the paper base composite construction according to an embodiment of the present invention.The paper base composite construction can
To be applied in battery, as collector, it can be used for other scenes, the utility model is not construed as limiting this.
Shown in Figure 1, which may include: paper substrates 1, in the upper and lower table of the paper substrates 1
Face is successively coated with bonding force enhancement layer 2 and the coat of metal 3 respectively.
It is successively coated with bonding force enhancement layer 2 and the coat of metal 3, paper substrates respectively by the two sides on paper substrates 1
It realizes loss of weight, and lower ductility can be obtained.Bonding force enhancement layer 2 can reduce falling off for the coat of metal, can effectively prevent
The coat of metal is easy to fall off the problem of causing the performance of collector to be lost.Paper base composite construction according to the present utility model can be real
The lightweight of existing battery, the coat of metal are not easy to fall off, moreover it is possible to improve energy density, reduce cost.
Wherein, paper substrates 1 can be super thin fiber paper, graphite paper or nanometer paper etc., and the thickness of paper substrates 1 can be
2-12μm。
Optionally, the super thin fiber paper can be specific super thin fiber paper or high temperature resistant ultrathin fibrous paper.
In one example, the specific super thin fiber paper is made of the component of following parts by weight: composite fibre 40-100
Part, mixing wet strength agent 5-20 parts, 1-3 parts of bamboo charcoal powder, 0.1-1 parts of nano-titanium dioxide, 0.1-1 parts of tristerin, poly- third
2-6 parts of acrylamide carboxylic, 2-6 parts of sodium carboxymethylcellulose pyce, 3-15 parts of polyethylene glycol, 2-10 parts of polyvinyl alcohol, 2-8 parts of kaolin, carbon
Sour calcium 2-8 parts, 2-8 parts of converted starch, 2-8 parts of borax, 2-8 parts of styrene-butadiene latex.
Optionally, the composite fibre can be in wood-fibred, bamboo fibre, manila hemp fiber and polynoise fiber
Any at least two mixing；Mixing wet strength agent can be PAE resin, polyamide, butyl polyacrylate and PEI resin
In any at least two mixing.
For example, mixing wet strength agent can be PAE resin, polyamide, butyl polyacrylate and four kinds of PEI resin it is mixed
It closes, four mixed proportion can are as follows: PAE resin 20-30wt%, polyamide 20-30wt%, butyl polyacrylate 20-
30wt% and PEI resin 20-30wt%.Four kinds of resins of the utility model can play synergistic effect, can not only larger improve
Wet, the dry strength of paper, also can be improved in specific super thin fiber paper formula to composite fibre, bamboo charcoal powder, kaolin, converted starch,
The adhesive force of borax etc. improves roughness, can be with one layer of bonding force enhancement layer on direct plating.
Specific super thin fiber paper can use relevant wet process or dry process, such as utilize air-flow or combing work into the net
Skill after first mixing feed components, is equably laid with networking, using calender hot rolling, hot wind impingement drying technique system
Thickness is controllable, uniform specific super thin fiber paper.
Nanometer paper and graphite paper can obtain by the way of in related art, and the utility model does not limit this
It is fixed.
The paper bases such as super thin fiber paper, graphite paper or nanometer paper, can be with one layer of bonding force enhancement layer on direct plating without punching
2, so as to reduce falling off for the coat of metal 3, the coat of metal 3 can be effectively prevent, which to be easy to fall off, causes the performance of collector to be lost.
Paper base composite construction using super thin fiber paper, graphite paper or nanometer paper etc. as paper substrates, such as paper membrane or collection
Fluid, in compacted density 3.5-3.6g/cm3In the case where, the extension of elongation copper foil at 0.2%-0.5%, square one
Rate is greater than 0.7%；It is, the elongation of paper base composite construction is lower in the case where realizing the compacted density needed.
The paper bases such as super thin fiber paper, graphite paper or nanometer paper are conducive to the infiltration of electrolyte, can in cell processing course
To improve the speed of fluid injection process, the abundant infiltration of electrolyte can accelerate the percent of pass of lithium ion again after being processed into battery, from
And further mention lithium battery high rate performance.
Optionally, the coat of metal 3 can be copper metal coating or aluminum metal coating, in one example, copper metal coating
Thickness can be 100-1000nm, 200-600nm may further be selected as；The thickness of aluminum metal coating can be 100-2000nm,
It may further be selected as 500-1000nm.
Optionally, bonding force enhancement layer 2 can be metal coating or nonmetallic plated film, the thickness of the bonding force enhancement layer 2
Degree can be 10-100nm, it is possible to further be 10-50nm.
When the coat of metal 3 is copper metal coating, which may be used as the cathode of lithium ion battery
Collector.In one example, bonding force enhancement layer 2 can be Zn, Ni, Sn or Fe metal coating, or, in another example
In, bonding force enhancement layer 2 can be SiC, Si3N4、SiO2、Al2O3Or the nonmetallic plated film of SiO, for example, can be Al2O3Non- gold
Belong to plated film.
When the coat of metal 3 is aluminum metal coating, which may be used as the anode of lithium ion battery
Collector.In one example, bonding force enhancement layer 2 can be Ni metal coating, or, in another example, bonding force increases
Strong layer 2 can be SiC, Si3N4Or Al2O3Nonmetallic plated film.
It should be noted that being only above the several of the utility model to the explanation of bonding force enhancement layer 2 and the coat of metal 3
Kind example, does not limit the scope of the utility model, those skilled in the art can be according to actual application scenarios in any way
Select the parameters such as material, the thickness of bonding force enhancement layer 2 and the coat of metal 3.
Fig. 2 shows the schematic diagrames according to the paper base composite construction of an embodiment of the present invention.As shown in Fig. 2, the paper base
Composite construction can also include: antioxidation coating 4, and antioxidation coating 4 can be plated in the outside of the coat of metal 3 as shown in Figure 1.
The effect of antioxidation coating 4 or purpose are that the coat of metal is oxidized in order to prevent, and what is obtained by the way of plated film is anti-
Oxide layer 4 can also prevent the coat of metal from falling off.Antioxidation coating 4 can be fine and close metal layer or non-metallic layer.
When the coat of metal is copper metal coating, the antioxidation coating can be fine and close Al, Fe, Ni, Zn or Ti gold
Belong to layer, or is Fe2O3、Al2O3、Si3N4, SiC or SiO2Non-metallic layer；
When the coat of metal is aluminum metal coating, the antioxidation coating can be fine and close Ni metal layer, or be Al2O3、
Si3N4Or SiC non-metallic layer.
In one example, the thickness of antioxidation coating can be 10-100nm, can further be selected as 10-50nm.
It should be noted that being above only several examples of the utility model to the explanation of antioxidation coating 4, not with any
Mode limits the scope of the utility model, and those skilled in the art can select the material of antioxidation coating according to actual application scenarios
The parameters such as material, thickness.
In addition, paper substrates 1, bonding force enhancement layer 2, the coat of metal 3 and antioxidation coating 4 thickness can be according to reality
Application scenarios be adjusted, the utility model is not construed as limiting this.
Fig. 3 shows the schematic diagram of the paper base composite construction according to an embodiment of the present invention.
As described above, obtained by the way of plated film antioxidation coating 4 when, antioxidation coating 4 can both prevent the coat of metal
It is oxidized, can also prevent the coat of metal from falling off.In the present embodiment, the paper base composite construction can not include bonding force
Enhancement layer 2, for example, the upper and lower surfaces in the paper substrates 1 are successively coated with the coat of metal 3 and antioxidation coating 4 respectively.
Paper substrates realize loss of weight, and can obtain lower ductility.Antioxidation coating 4 can both prevent coat of metal quilt
Oxidation, can also prevent the coat of metal from falling off, and the coat of metal can be effectively prevent, which to be easy to fall off, causes the performance of collector to lose
Problem.Therefore, the lightweight of battery may be implemented according to the paper base composite construction of the utility model embodiment, the coat of metal is not allowed
It is easy to fall off, moreover it is possible to improve energy density, reduce cost.
The paper base composite construction that the utility model obtains is used in lithium ion battery as negative current collector, it is most basic
Function be to collect electric current, while storing negative electrode material as carrier, i.e., negative electrode material (cell active materials) are generated
Electric current collects to form biggish current versus output.
The paper base composite construction that the utility model obtains is used in lithium ion battery as plus plate current-collecting body, it is most basic
Function be to collect electric current, while storing positive electrode as carrier, i.e., positive electrode (cell active materials) are generated
Electric current collects to form biggish current versus output.
The paper base composite construction that the utility model as described above obtains is carried out as negative pole currect collecting and plus plate current-collecting body
Test, can be obtained following result: by realizing loss of weight using super thin fiber paper, graphite paper or nanometer paper etc. as paper substrates,
In, loss of weight 70% can be realized with aluminizer collector, thickness reduces by 45%, it can be achieved that loss of weight by taking copper plating film collector as an example
75%, significantly improve battery energy density.
Using super thin fiber paper, graphite paper or nanometer paper etc. as the paper membrane of paper substrates or collector in compacted density 3.5-
3.6g/cm3In the case where, the elongation of elongation aluminium foil at 0.2%-0.5%, square one is greater than 0.7%；It is,
In the case where realizing the compacted density needed, the elongation of paper membrane or collector is lower.
The series of detailed descriptions listed above only for the utility model possible embodiments it is specific
Illustrate, they are all without departing from made by the utility model skill spirit etc. not to limit the protection scope of the utility model
Effect embodiment or change should be included within the scope of protection of this utility model.
Claims (13)
1. a kind of paper base composite construction, which is characterized in that including paper substrates, distinguish in the upper and lower surfaces of the paper substrates
Successively it is coated with bonding force enhancement layer and the coat of metal.
2. paper base composite construction according to claim 1, which is characterized in that the outside of the coat of metal is also coated with oxygen
Change layer.
3. paper base composite construction according to claim 1, which is characterized in that the coat of metal is copper metal coating or aluminium
The coat of metal.
4. paper base composite construction according to claim 1-3, which is characterized in that the paper substrates with a thickness of
2-12μm。
5. paper base composite construction according to claim 1-3, which is characterized in that the paper substrates are ultra-thin fibre
Tie up paper, graphite paper or nanometer paper.
6. paper base composite construction according to claim 1-3, which is characterized in that the bonding force enhancement layer is gold
Belong to plated film or nonmetallic plated film.
7. paper base composite construction according to claim 6, which is characterized in that when the coat of metal is copper metal coating,
The bonding force enhancement layer is Zn, Ni, Sn or Fe metal coating, or is SiC, Si3N4、SiO2、Al2O3Or the nonmetallic plated film of SiO；
When the coat of metal is aluminum metal coating, the bonding force enhancement layer is Ni metal coating, or is SiC, Si3N4Or Al2O3It is non-
Metal coating.
8. paper base composite construction according to claim 1-3, which is characterized in that the thickness of the bonding force enhancement layer
Degree is 10-100nm.
9. paper base composite construction according to claim 3, which is characterized in that
The copper metal coating with a thickness of 100-1000nm；
Or the aluminum metal coating with a thickness of 100-2000nm.
10. paper base composite construction according to claim 2, which is characterized in that
The antioxidation coating is metal layer or non-metallic layer；
When the coat of metal is copper metal coating, the antioxidation coating is fine and close Al, Fe, Ni, Zn or Ti metal layer, or is
Fe2O3、Al2O3、Si3N4, SiC or SiO2Non-metallic layer；
When the coat of metal is aluminum metal coating, the antioxidation coating is fine and close Ni metal layer, or is Al2O3、Si3N4Or
SiC non-metallic layer.
11. the paper base composite construction according to claim 2 or 10, which is characterized in that the antioxidation coating with a thickness of 10-
100nm。
12. paper base composite construction according to claim 2, which is characterized in that described anti-when being obtained by the way of plated film
Oxide layer, the paper base composite structure do not include the bonding force enhancement layer.
13. a kind of battery, which is characterized in that the battery is made using the paper base composite construction any in claim 1-12
For electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820407846.0U CN208336378U (en) | 2018-03-26 | 2018-03-26 | A kind of paper base composite construction and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820407846.0U CN208336378U (en) | 2018-03-26 | 2018-03-26 | A kind of paper base composite construction and battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281666A (en) * | 2018-03-26 | 2018-07-13 | 安徽金美新材料科技有限公司 | A kind of paper substrate composite construction and battery |
| CN111710819A (en) * | 2019-03-18 | 2020-09-25 | 宁德新能源科技有限公司 | Pole piece, battery core and battery |
| WO2020220686A1 (en) * | 2019-04-28 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Positive current collector, positive electrode plate, secondary battery, and device |
| WO2023208240A1 (en) * | 2022-04-29 | 2023-11-02 | 扬州纳力新材料科技有限公司 | Current collector, and preparation method therefor and application thereof |
-
2018
- 2018-03-26 CN CN201820407846.0U patent/CN208336378U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281666A (en) * | 2018-03-26 | 2018-07-13 | 安徽金美新材料科技有限公司 | A kind of paper substrate composite construction and battery |
| CN108281666B (en) * | 2018-03-26 | 2024-04-02 | 宁德时代新能源科技股份有限公司 | Paper-based composite structure and battery |
| CN111710819A (en) * | 2019-03-18 | 2020-09-25 | 宁德新能源科技有限公司 | Pole piece, battery core and battery |
| WO2020220686A1 (en) * | 2019-04-28 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Positive current collector, positive electrode plate, secondary battery, and device |
| CN112290029A (en) * | 2019-04-28 | 2021-01-29 | 宁德时代新能源科技股份有限公司 | Positive current collector, positive pole piece, electrochemical device, electric automobile and electronic product |
| CN112290029B (en) * | 2019-04-28 | 2022-04-22 | 宁德时代新能源科技股份有限公司 | Positive current collector, positive pole piece, electrochemical device, electric automobile and electronic product |
| WO2023208240A1 (en) * | 2022-04-29 | 2023-11-02 | 扬州纳力新材料科技有限公司 | Current collector, and preparation method therefor and application thereof |
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