CN110797213A - Super capacitor pole piece with C transition layer and preparation method thereof - Google Patents
Super capacitor pole piece with C transition layer and preparation method thereof Download PDFInfo
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- 230000007704 transition Effects 0.000 title claims abstract description 64
- 239000003990 capacitor Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 65
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 53
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000013077 target material Substances 0.000 claims abstract description 18
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 11
- 238000004544 sputter deposition Methods 0.000 claims description 10
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 9
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 9
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 9
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011889 copper foil Substances 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 238000000227 grinding Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000005030 aluminium foil Substances 0.000 description 3
- 239000012300 argon atmosphere Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
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- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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
- Y02E60/13—Energy storage using capacitors
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- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to a super capacitor pole piece with a C transition layer, which comprises a base body, two C transition layers and two carbon coatings, wherein the two C transition layers are respectively coated on two sides of the base body, and the two carbon coatings are respectively coated on the other surfaces of the two C transition layers. According to the invention, the matrix is modified in a magnetron sputtering manner, and the internal resistance of the carbon coating in contact with the matrix is greatly reduced by adding the C transition layer, so that the overall internal resistance is reduced, and the low internal resistance is still maintained after circulation, thereby greatly prolonging the service life of a super capacitor product; because the transition layer is made of the same material, the adhesion between the coating and the matrix is better, and the transition effect is better; and the C target material is convenient to prepare and can be recycled by grinding, so that the cost is effectively saved.
Description
Technical Field
The invention relates to a super capacitor pole piece with a C transition layer and a preparation method thereof, belonging to the technical field of super capacitor pole pieces.
Background
The super capacitor is a compact energy source with power density and energy density between a secondary battery and a common capacitor, has the advantages of large capacity, large-current rapid charge and discharge, long cycle life and the like by virtue of an electric double layer structure, and is expected to become a next-generation energy storage device with high efficiency, safety and superiority. In terms of the magnitude of the capacitance, the capacitance provided by the super capacitor can reach farad level, and the leap of the capacitance from the micro farad level of the traditional capacitor to the primary quality of the farad level is realized, which is a revolutionary and significant creation with milestone significance in the energy technology history.
With the development of the super capacitor, it can provide good performance indexes such as high voltage, high power and high reliability required by various applications, and thus has wide applications in many fields such as power systems, electric vehicles, portable devices, even military affairs and the like. The super capacitor is widely applied to the fields of automobile electronics, intelligent industrial control, intelligent home, 5G base stations, military electromagnetic guns and the like. Aiming at the application in the field, the super capacitor is in the role of a standby power supply or a starting power supply, and the super capacitor is required to have longer service life, larger discharge current and performance under an extreme temperature environment.
In order to meet the requirements, a key index technology, namely lower internal resistance, is provided for the super capacitor. The internal resistance directly affects the service life of the super capacitor, the maximum current carried, and the like. The key core technology of the current domestic super capacitor preparation technology lies in the preparation of pole pieces, which is mainly realized by wet coating, and the technical level of the pole piece preparation directly determines whether the internal resistance of the super capacitor is low enough. At present, the initial internal resistance level of the super capacitor and the internal resistance level after the super capacitor is recycled are multiplied (the rising rate reaches 250%) because the contact resistance of a current collector and a coating is increased, and the service life and the electrical property of the super capacitor are greatly influenced.
The traditional method for improving the internal resistance generally adjusts the rolling shrinkage rate through formula adjustment. If the formula is adjusted, the capacity performance is influenced, so that the stored energy is less; if the rolling shrinkage is adjusted, the production efficiency is deteriorated because the internal resistance is reduced by rolling a plurality of times (3 or more times). Moreover, the problem of a drastic increase in internal resistance after recycling cannot be improved.
Therefore, a method is needed to solve the problem of excessively high internal resistance increase after the super capacitor is recycled, so that the super capacitor still keeps low internal resistance and good electrical performance after recycling.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the super capacitor pole piece with the C transition layer and the preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a super capacitor pole piece with C transition layer, super capacitor pole piece includes base member, two-layer C transition layer and two-layer carbon coating, two-layer C transition layer coats respectively in the two-sided of base member, two-layer carbon coating coats respectively in another surface on two-layer C transition layer.
As a preferred embodiment of the pole piece of the supercapacitor, the thickness of the C transition layer is 100-200 nm.
As a preferred embodiment of the pole piece of the supercapacitor, the thickness of the carbon coating is 120-220 nm.
As a preferred embodiment of the pole piece of the supercapacitor, the thickness of the substrate is 18-22 μm.
As a preferred embodiment of the supercapacitor pole piece of the present invention, the substrate is an aluminum foil current collector or a copper foil current collector.
In a second aspect, the invention provides a preparation method of the supercapacitor pole piece with the C transition layer, which includes the following steps:
(1) bombarding the C target material by argon atoms by adopting a magnetron sputtering method, and respectively forming C transition layers on the surfaces of the two sides of the substrate to obtain a modified substrate;
(2) and (3) uniformly coating the carbon slurry on two sides of the modified substrate obtained in the step (1) to obtain the supercapacitor pole piece with the C transition layer.
The method is characterized in that a mode of combining magnetron sputtering and a coating process is firstly adopted, Ar gas atoms are used for bombarding a C target material in a magnetron sputtering mode, modification is carried out on a substrate of the supercapacitor pole piece, and a same-element transition layer is sputtered, namely a C transition layer is sputtered on the substrate; and then, coating the modified substrate, uniformly coating the carbon slurry on the substrate, and preparing a supercapacitor monomer through subsequent baking, rolling, winding and packaging to realize that the initial internal resistance and the internal resistance after circulation of the supercapacitor are both in a lower level so as to meet the use requirement. The invention greatly reduces the contact internal resistance of the carbon coating and the matrix in the preparation process of the pole piece, thereby realizing the reduction of the integral internal resistance, and because the transition layer is made of the same material, the adhesive force between the coating and the matrix is better, and the lower contact resistance is still maintained after circulation, so that the super capacitor still maintains the lower internal resistance and the better electrical property to continue working after the circulation is carried out for ten thousand times, and the service life of a super capacitor product is greatly prolonged. Meanwhile, the C target is a powder target prepared from the same raw materials as the carbon coating material, is convenient to prepare and can be recycled in a grinding mode, and cost is effectively saved.
As a preferred embodiment of the preparation method of the present invention, in the step (1), the diameter of the C target is 60mm, the thickness of the C target is 3mm, the raw material for preparing the C target is the same as the raw material for preparing the carbon coating, and the preparation method of the C target comprises: and putting the solidified carbon slurry powder into a target holder, and compacting the powder by using a press to obtain the carbon slurry.
As a preferred embodiment of the preparation method, in the step (1), the back substrate vacuum is 6.0-7.0 × 10 in the magnetron sputtering process-4Pa, the cavity pressure is 0.4-0.6 Pa, the argon flow is 30sccm, the target base distance is 5-7 cm, the sputtering power is 120-140W, and the sputtering time is 60 min.
As a preferred embodiment of the preparation method of the present invention, in the step (2), the carbon slurry is prepared by mixing activated carbon, carbon black, sodium carboxymethyl cellulose and styrene butadiene rubber, and uniformly dispersing the mixture by planetary stirring. The mass ratio of the activated carbon to the carbon black to the sodium carboxymethylcellulose to the styrene butadiene rubber is 85:9:2: 4.
In a third aspect, the invention provides a super capacitor, which comprises the above super capacitor pole piece with the C transition layer.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the matrix is modified in a magnetron sputtering manner, and the internal resistance of the carbon coating in contact with the matrix is greatly reduced by adding the C transition layer, so that the overall internal resistance is reduced, and the low internal resistance is still maintained after circulation, thereby greatly prolonging the service life of a super capacitor product; because the transition layer is made of the same material, the adhesion between the coating and the matrix is better, and the transition effect is better; and the C target material is convenient to prepare and can be recycled by grinding, so that the cost is effectively saved.
Drawings
FIG. 1 is a schematic structural diagram of a supercapacitor electrode plate having a C transition layer according to the present invention.
Fig. 2 is a charge-discharge curve chart obtained in example 1.
FIG. 3 is a graph of the cycle performance obtained in example 1.
FIG. 4 is a graph comparing the initial internal resistance obtained in example 1 with the internal resistance after cycling.
Fig. 5 is a charge-discharge curve chart obtained in example 2.
FIG. 6 is a graph of the cycle performance obtained in example 2.
FIG. 7 is a graph comparing the initial internal resistance obtained in example 2 with the internal resistance after cycling.
Fig. 8 is a charge-discharge curve chart obtained in example 3.
FIG. 9 is a graph of the cycle performance obtained in example 3.
FIG. 10 is a graph comparing the initial internal resistance obtained in example 3 with the internal resistance after cycling.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1
A super capacitor pole piece with a C transition layer comprises a base body, two C transition layers and two carbon coatings, wherein the two C transition layers are respectively coated on two sides of the base body, and the two carbon coatings are respectively coated on the other surfaces of the two C transition layers; the thickness of C transition layer is 100nm, the thickness of carbon coating is 120nm, the thickness of base member is 18 mu m, the base member is the aluminium foil mass flow body of corroding. Fig. 1 shows a schematic structural diagram of a supercapacitor pole piece having a C transition layer according to this embodiment.
The preparation method of the supercapacitor pole piece with the C transition layer in the embodiment comprises the following steps:
(1) bombarding the C target material by argon atoms by adopting a magnetron sputtering method, and respectively forming C transition layers on the surfaces of the two sides of the substrate to obtain a modified substrate; the diameter of the C target material is 60mm, the thickness of the C target material is 3mm, the preparation raw material of the C target material is the same as that of the carbon coating, and the preparation method of the C target material comprises the following steps: putting the solidified powder of the carbon slurry into a target holder, and compacting the powder by a press to obtain the carbon slurry; in the magnetron sputtering process, the back bottom vacuum is 6.0-7.0 multiplied by 10-4Pa, the cavity pressure is 0.4-0.6 Pa, the argon flow is 30sccm, the target base distance is 5cm, the sputtering power is 120W, and the sputtering time is 60 min;
(2) uniformly coating carbon slurry on two sides of the modified substrate obtained in the step (1) to obtain a super capacitor pole piece with a C transition layer; the carbon paste is a mixture of active carbon, carbon black, sodium carboxymethylcellulose and styrene butadiene rubber, and is uniformly dispersed by planetary stirring to form pole piece carbon paste; the mass ratio of the activated carbon to the carbon black to the sodium carboxymethylcellulose to the styrene butadiene rubber is 85:9:2: 4.
The electrode plate of the embodiment is rolled to a thickness of 120 μm by a roller press, and is cut into thin strip electrode plates with a width of 7mm by a cutting machine, the effective length of the negative electrode is 63mm and the effective length of the positive electrode is 72mm by calculation, the facing area is increased by winding, pins are led on the inner electrode and the outer electrode to form a battery cell, and the battery cell is transferred to an argon atmosphere and is baked. And then, the cell is filled into an aluminum shell, electrolyte is added, and the opening is sealed, so that the super capacitor with the voltage capacity of 2.7V1F is prepared. And performing subsequent charge and discharge tests (test 5 groups), cycle performance tests (test 5 groups) and comparison of the initial internal resistance and the internal resistance after the cycle, wherein the test results are respectively shown in figures 2-4.
From the graphs in fig. 2 to 4, it can be seen that the super capacitor with the current collector transition layer having a thickness of 100nm and a product voltage capacity of 2.7V1F has good charge and discharge performance, good curve symmetry between the charge process and the discharge process, an initial internal resistance of 150 to 155m Ω, a capacity retention rate of more than 90% after 20000 cycles, an internal resistance of only about 235 to 240m Ω, and an increase rate of only 60%.
Example 2
A super capacitor pole piece with a C transition layer comprises a base body, two C transition layers and two carbon coatings, wherein the two C transition layers are respectively coated on two sides of the base body, and the two carbon coatings are respectively coated on the other surfaces of the two C transition layers; the thickness of C transition layer is 150nm, the thickness of carbon coating is 180nm, the thickness of base member is 20 μm, the base member is the aluminium foil mass flow body that corrodes.
The preparation method of the supercapacitor pole piece with the C transition layer in the embodiment comprises the following steps:
(1) bombarding the C target material by argon atoms by adopting a magnetron sputtering method, and respectively forming C transition layers on the surfaces of the two sides of the substrate to obtain a modified substrate; the diameter of the C target material is 60mm, the thickness is 3mm, and the C target materialThe preparation raw materials of the material are the same as those of the carbon coating, and the preparation method of the C target material comprises the following steps: putting the solidified powder of the carbon slurry into a target holder, and compacting the powder by a press to obtain the carbon slurry; in the magnetron sputtering process, the back bottom vacuum is 6.0-7.0 multiplied by 10-4Pa, the cavity pressure is 0.4-0.6 Pa, the argon flow is 30sccm, the target base distance is 5cm, the sputtering power is 130W, and the sputtering time is 60 min;
(2) uniformly coating carbon slurry on two sides of the modified substrate obtained in the step (1) to obtain a super capacitor pole piece with a C transition layer; the carbon paste is a mixture of active carbon, carbon black, sodium carboxymethylcellulose and styrene butadiene rubber, and is uniformly dispersed by planetary stirring to form pole piece carbon paste; the mass ratio of the activated carbon to the carbon black to the sodium carboxymethylcellulose to the styrene butadiene rubber is 85:9:2: 4.
The electrode plate of the embodiment is rolled to 154 μm in thickness by a roller press, and is cut into thin electrode plates with a width of 18mm by a slitter, the effective length of the negative electrode is 77mm by calculation, the effective length of the positive electrode is 86mm, the facing area is increased by winding, needles are led on the inner electrode and the outer electrode to form a battery cell, the battery cell is transferred to argon atmosphere and is baked, then the battery cell is put into an aluminum shell, electrolyte is added and the shell is sealed, and the supercapacitor with the voltage capacity of 2.7V 5F is prepared. And performing subsequent charge and discharge tests (test 5 groups), cycle performance tests (test 5 groups) and comparison of the initial internal resistance and the internal resistance after the cycle, wherein the test results are respectively shown in fig. 5-7.
From fig. 5 to 7, it can be seen that the super capacitor with the current collector transition layer having a thickness of 150nm and a product voltage capacity of 2.7V 5F has good charge and discharge performance, good curve symmetry between the charge process and the discharge process, an initial internal resistance of 45 to 48m Ω, a capacity retention rate of 90% or more after 20000 cycles, an internal resistance of only about 71 to 73m Ω, and an increase rate of only 61%.
Example 3
A super capacitor pole piece with a C transition layer comprises a base body, two C transition layers and two carbon coatings, wherein the two C transition layers are respectively coated on two sides of the base body, and the two carbon coatings are respectively coated on the other surfaces of the two C transition layers; the thickness of C transition layer is 200nm, the thickness of carbon coating is 220nm, the thickness of base member is 22 mu m, the base member is the aluminium foil mass flow body of corroding.
The preparation method of the supercapacitor pole piece with the C transition layer in the embodiment comprises the following steps:
(1) bombarding the C target material by argon atoms by adopting a magnetron sputtering method, and respectively forming C transition layers on the surfaces of the two sides of the substrate to obtain a modified substrate; the diameter of the C target material is 60mm, the thickness of the C target material is 3mm, the preparation raw material of the C target material is the same as that of the carbon coating, and the preparation method of the C target material comprises the following steps: putting the solidified powder of the carbon slurry into a target holder, and compacting the powder by a press to obtain the carbon slurry; in the magnetron sputtering process, the back bottom vacuum is 6.0-7.0 multiplied by 10-4Pa, the cavity pressure is 0.4-0.6 Pa, the argon flow is 30sccm, the target base distance is 5cm, the sputtering power is 140W, and the sputtering time is 60 min;
(2) uniformly coating carbon slurry on two sides of the modified substrate obtained in the step (1) to obtain a super capacitor pole piece with a C transition layer; the carbon paste is a mixture of active carbon, carbon black, sodium carboxymethylcellulose and styrene butadiene rubber, and is uniformly dispersed by planetary stirring to form pole piece carbon paste; the mass ratio of the activated carbon to the carbon black to the sodium carboxymethylcellulose to the styrene butadiene rubber is 85:9:2: 4.
The electrode plate of the embodiment is rolled to a thickness of 220 μm by a roller press, and is cut into thin electrode plates with a width of 30mm by a slitter, the effective length of the negative electrode is 30mm by calculation, the effective length of the positive electrode is 33mm, the facing area of the positive electrode is increased by winding, needles are led on the inner electrode and the outer electrode to form a battery cell, the battery cell is transferred to an argon atmosphere and is baked, then the battery cell is put into an aluminum shell, electrolyte is added and the shell is sealed, and the supercapacitor with the voltage capacity of 2.7V 50F is prepared. And performing subsequent charge and discharge tests (test 5 groups), cycle performance tests (test 5 groups) and comparison of the initial internal resistance and the internal resistance after the cycle, wherein the test results are respectively shown in fig. 8-10.
From fig. 8 to 10, it can be seen that the super capacitor with the current collector transition layer having a thickness of 200nm and a product voltage capacity of 2.7V 50F has good charge and discharge performance, good curve symmetry between the charge process and the discharge process, an initial internal resistance of 15 to 18m Ω, a capacity retention rate of 90% or more after 20000 cycles, an internal resistance of only about 24 to 29m Ω, and an increase rate of only 60%.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a super capacitor pole piece with C transition layer, its characterized in that, super capacitor pole piece includes base member, two-layer C transition layer and two-layer carbon coating, two-layer C transition layer coats respectively in the two-sided of base member, two-layer carbon coating coats respectively in another surface on two-layer C transition layer.
2. The pole piece of the supercapacitor of claim 1, wherein the thickness of the C transition layer is 100-200 nm.
3. The supercapacitor pole piece of claim 1, wherein the carbon coating has a thickness of 120 to 220 nm.
4. The supercapacitor pole piece of claim 1, wherein the substrate has a thickness of 18 to 22 μm.
5. The supercapacitor pole piece of claim 1, wherein the substrate is an aluminum foil current collector or a copper foil current collector.
6. The preparation method of the supercapacitor pole piece with the C transition layer according to claims 1 to 5, comprising the following steps:
(1) bombarding the C target material by argon atoms by adopting a magnetron sputtering method, and respectively forming C transition layers on the surfaces of the two sides of the substrate to obtain a modified substrate;
(2) and (3) uniformly coating the carbon slurry on two sides of the modified substrate obtained in the step (1) to obtain the supercapacitor pole piece with the C transition layer.
7. The method according to claim 6, wherein in the step (1), the diameter of the C target is 60mm, the thickness of the C target is 3mm, the raw material for preparing the C target is the same as the raw material for preparing the carbon coating, and the method for preparing the C target comprises the following steps: and putting the solidified carbon slurry powder into a target holder, and compacting the powder by using a press to obtain the carbon slurry.
8. The method according to claim 6, wherein in the step (1), the back substrate vacuum is 6.0-7.0 x 10 during the magnetron sputtering process-4Pa, the cavity pressure is 0.4-0.6 Pa, the argon flow is 30sccm, the target base distance is 5-7 cm, the sputtering power is 120-140W, and the sputtering time is 60 min.
9. The method according to claim 6, wherein in the step (2), the carbon slurry is prepared by mixing activated carbon, carbon black, sodium carboxymethyl cellulose and styrene butadiene rubber, and uniformly dispersing by planetary stirring.
10. An ultracapacitor, comprising the ultracapacitor pole piece with a C transition layer according to claims 1-5.
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| CN108774459A (en) * | 2018-06-05 | 2018-11-09 | 桑德集团有限公司 | A kind of coating and preparation method thereof, battery electrode |
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| CN103779104A (en) * | 2012-10-23 | 2014-05-07 | 海洋王照明科技股份有限公司 | Super capacitor electrode and preparation method thereof |
| CN107578926A (en) * | 2017-07-20 | 2018-01-12 | 西北工业大学 | The preparation method of carbon fiber transition metal carbon nano tube flexible nanometer combined electrode material |
| CN108774459A (en) * | 2018-06-05 | 2018-11-09 | 桑德集团有限公司 | A kind of coating and preparation method thereof, battery electrode |
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