CN112863901B - Preparation method of supercapacitor slurry - Google Patents
Preparation method of supercapacitor slurry Download PDFInfo
- Publication number
- CN112863901B CN112863901B CN202110236127.3A CN202110236127A CN112863901B CN 112863901 B CN112863901 B CN 112863901B CN 202110236127 A CN202110236127 A CN 202110236127A CN 112863901 B CN112863901 B CN 112863901B
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- Prior art keywords
- polymer resin
- sulfur
- doped graphene
- solid hydrogel
- water
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- 239000002002 slurry Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000002952 polymeric resin Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 24
- 239000000017 hydrogel Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005469 granulation Methods 0.000 claims abstract description 6
- 230000003179 granulation Effects 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 239000004965 Silica aerogel Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000004964 aerogel Substances 0.000 abstract description 9
- 239000005543 nano-size silicon particle Substances 0.000 abstract description 9
- 239000003990 capacitor Substances 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
-
- 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
Abstract
The invention discloses a preparation method of supercapacitor slurry, which comprises the following steps: mixing a proper amount of high-water-absorptivity polymer resin with sulfur-doped graphene, putting the mixture into a double-screw extruder, controlling the rotating speed of a screw to be 180-600 rpm, and performing melt extrusion and granulation to obtain high-water-absorptivity polymer resin particles internally loaded with the sulfur-doped graphene; fully absorbing water and expanding the high-hydroscopicity high polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape; and mixing and stirring the obtained solid hydrogel and the nano-silicon aerogel uniformly, placing the mixture in a microwave tube type furnace after the nano-silicon aerogel is completely adsorbed, heating to 1000 ℃ at the heating rate of 100 ℃/min under the protection of N2 until the solid hydrogel is completely dehydrated, naturally cooling to room temperature, adding a solvent for ultrasonic dispersion, and thus obtaining the supercapacitor slurry. The invention can ensure the stability and the uniformity of the slurry, thereby improving the performance of the capacitor.
Description
Technical Field
The invention relates to the field of material preparation, in particular to a preparation method of supercapacitor slurry.
Background
The super capacitor has the advantages of high power density, long cycle life, excellent low temperature and safety performance and the like, and has huge application prospects in the fields of start-stop power supplies of electric automobiles, urban public rail transit, large-scale photovoltaic and wind power energy storage of the electric automobiles. In order to meet the increasing demand, the performance of the super capacitor is improved from the aspects of materials, processes and the like, and the preparation of capacitor products with high energy density, high power density and long cycle life is always a hot point of research.
The pulping process is the foremost process of the preparation process of the super capacitor, and the stability and uniformity of the slurry have decisive influence on the performance of the capacitor.
Disclosure of Invention
The invention aims to provide a preparation method of supercapacitor slurry, which ensures the stability and uniformity of the slurry, thereby improving the performance of a capacitor.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of supercapacitor slurry comprises the following steps:
s1, mixing a proper amount of high-water-absorptivity polymer resin with sulfur-doped graphene, putting the mixture into a double-screw extruder, controlling the rotation speed of the screw to be 180-600 rpm, and performing melt extrusion and granulation to obtain high-water-absorptivity polymer resin particles internally loaded with sulfur-doped graphene;
s2, fully absorbing water and expanding the super absorbent polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape;
s3, mixing the solid hydrogel with the nano-silica aerogel, stirring, placing in a microwave tube furnace, and adding N2Under the protection condition, the temperature is raised to 1000 ℃ at the heating rate of 100 ℃/min until the solid hydrogel is completely dehydrated, the temperature is naturally reduced to the room temperature, and a solvent is added for ultrasonic dispersion to prepare the supercapacitor slurry.
In step S1, the super absorbent polymer resin is one of polyacrylate, polyvinyl alcohol, and polyoxyalkylene.
In step S1, the mass ratio of the super absorbent polymer resin to the sulfur-doped graphene is 3: 1 to 3.
Further, in the step S1, the temperature of the melt extrusion is controlled to be 120 to 180 ℃.
Further, in step S3, the mass ratio of the solid hydrogel to the nano-silica aerogel is 1: 0.2 to 10.
Further, in the step S3, ultrasonic dispersion is carried out for 60-300 min.
The invention has the following beneficial effects:
the method of wrapping sulfur-doped graphene with high water-absorption polymer resin realizes the controllability of the composite position of the nano-silicon aerogel and the sulfur-doped graphene, and can well avoid the agglomeration of the sulfur-doped graphene, thereby ensuring the stability and the uniformity of the slurry; the super capacitor prepared by the slurry has higher energy density, lower direct current internal resistance and higher power density.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of supercapacitor slurry comprises the following steps:
s1, taking a proper amount of super absorbent polymer resin, and mixing with the sulfur-doped graphene according to a mass ratio of 3: 1, putting the mixture into a double-screw extruder, controlling the rotating speed of the screws to be 180-600 rpm, and performing melt extrusion and granulation to obtain sulfur-doped graphene-loaded super absorbent polymer resin particles; wherein, the high water absorption polymer resin is polyacrylate; the temperature of melt extrusion is controlled between 120 and 180 ℃;
s2, fully absorbing water and expanding the super absorbent polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape;
s3, mixing the obtained solid hydrogel with the nano-silicon aerogel according to the mass ratio of 1: 0.2, mixing and stirring uniformly, placing in a microwave tube type furnace after the nano-silicon aerogel is completely adsorbed, and adding N2Under the protection condition, heating to 1000 ℃ at the heating rate of 100 ℃/min until the solid hydrogel is completely dehydrated, naturally cooling to room temperature, adding a solvent, and ultrasonically dispersing for 60-300 min to obtain the super capacitorAnd (4) slurry.
Example 2
A preparation method of supercapacitor slurry comprises the following steps:
s1, taking a proper amount of super absorbent polymer resin, and mixing with the sulfur-doped graphene according to a mass ratio of 3: 2, putting the mixture into a double-screw extruder, controlling the rotation speed of the screws to be 180-600 rpm, and performing melt extrusion and granulation to obtain super absorbent polymer resin particles internally loaded with sulfur-doped graphene; wherein the high water-absorption polymer resin is polyvinyl alcohol; the temperature of melt extrusion is controlled between 120 and 180 ℃.
S2, fully absorbing water and expanding the super absorbent polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape;
s3, mixing the obtained solid hydrogel with the nano-silicon aerogel according to the mass ratio of 1: 5.1, placing the mixture in a microwave tube furnace after the nano-silicon aerogel is completely adsorbed, and adding N2Under the protection condition, heating to 1000 ℃ at a heating rate of 100 ℃/min until the solid hydrogel is completely dehydrated, naturally cooling to room temperature, adding a solvent, and performing ultrasonic dispersion for 60-300 min to obtain the supercapacitor slurry.
Example 3
A preparation method of supercapacitor slurry comprises the following steps:
s1, taking a proper amount of super absorbent polymer resin, and mixing with the sulfur-doped graphene according to a mass ratio of 3: 3, putting the mixture into a double-screw extruder, controlling the rotating speed of the screws to be 180-600 rpm, and performing melt extrusion and granulation to obtain the sulfur-doped graphene loaded super absorbent polymer resin particles; the high water-absorbing polymer resin is polyoxyalkylene; the temperature of melt extrusion is controlled between 120 and 180 ℃.
S2, fully absorbing water and expanding the super absorbent polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape;
s3, mixing the obtained solid hydrogel with the nano-silicon aerogel according to the mass ratio of 1: 10, uniformly mixing and stirring, after the nano-silicon aerogel is completely adsorbed,placing in a microwave tube furnace at N2Under the protection condition, heating to 1000 ℃ at the heating rate of 100 ℃/min until the solid hydrogel is completely dehydrated, naturally cooling to room temperature, adding a solvent, and performing ultrasonic dispersion for 60-300 min to obtain the supercapacitor slurry.
The supercapacitor slurry prepared in the embodiments 1 to 3 is coated and rolled to prepare a supercapacitor pole piece, and then the supercapacitor pole piece is subjected to the procedures of slitting, winding, liquid injection, sealing and the like to prepare the supercapacitor, and the supercapacitor is subjected to the tests of the capacity, the energy density, the power density and the direct current internal resistance of the supercapacitor, so that the obtained result is obviously superior to that of the existing commercial graphene supercapacitor.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (3)
1. The preparation method of the supercapacitor slurry is characterized by comprising the following steps of:
s1, mixing a proper amount of high-water-absorptivity polymer resin with sulfur-doped graphene, putting the mixture into a double-screw extruder, controlling the rotation speed of the screw to be 180-600 rpm, and performing melt extrusion and granulation to obtain high-water-absorptivity polymer resin particles internally loaded with sulfur-doped graphene;
s2, fully absorbing water and expanding the super absorbent polymer resin particles internally loaded with the sulfur-doped graphene into solid hydrogel with a corresponding shape;
s3, mixing the solid hydrogel with the nano-silica aerogel, stirring, placing in a microwave tube furnace, and adding N2Under the protection condition, heating to 1000 ℃ at the heating rate of 100 ℃/min until the solid hydrogel is completely dehydrated, naturally cooling to room temperature, and adding a solvent for ultrasonic dispersion to prepare the supercapacitor slurry;
in the step S1, the super absorbent polymer resin is one of polyacrylate, polyvinyl alcohol, and polyoxyalkylene; the mass ratio of the high-water-absorptivity polymer resin to the sulfur-doped graphene is 3: 1-3; the temperature of melt extrusion is controlled between 120 and 180 ℃.
2. The method for preparing the supercapacitor slurry according to claim 1, wherein in the step S3, the mass ratio of the solid hydrogel to the nano-silica aerogel is 1: 0.2 to 10.
3. The method for preparing the supercapacitor slurry according to claim 1, wherein in the step S3, ultrasonic dispersion is performed for 60-300 min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236127.3A CN112863901B (en) | 2021-03-03 | 2021-03-03 | Preparation method of supercapacitor slurry |
| ZA2021/02315A ZA202102315B (en) | 2021-03-03 | 2021-04-08 | A method of preparing a supercapacitor slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236127.3A CN112863901B (en) | 2021-03-03 | 2021-03-03 | Preparation method of supercapacitor slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112863901A CN112863901A (en) | 2021-05-28 |
| CN112863901B true CN112863901B (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110236127.3A Active CN112863901B (en) | 2021-03-03 | 2021-03-03 | Preparation method of supercapacitor slurry |
Country Status (2)
| Country | Link |
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| CN (1) | CN112863901B (en) |
| ZA (1) | ZA202102315B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016201101A1 (en) * | 2015-06-09 | 2016-12-15 | William Marsh Rice University | Sulfur-containing carbon nanotube arrays as electrodes |
| CN109273279A (en) * | 2018-11-26 | 2019-01-25 | 河南城建学院 | A kind of electrode material for super capacitor |
| CN110054191A (en) * | 2019-04-20 | 2019-07-26 | 周口师范学院 | A kind of preparation method of porous silicon dioxide nano piece |
| CN110534699B (en) * | 2019-08-22 | 2021-07-13 | 江苏大毛牛新材料有限公司 | Preparation method of lithium ion battery negative plate |
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2021
- 2021-03-03 CN CN202110236127.3A patent/CN112863901B/en active Active
- 2021-04-08 ZA ZA2021/02315A patent/ZA202102315B/en unknown
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| Publication number | Publication date |
|---|---|
| ZA202102315B (en) | 2021-05-26 |
| CN112863901A (en) | 2021-05-28 |
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