CN114899015A - Zinc ion super capacitor positive electrode material and preparation method and application thereof - Google Patents
Zinc ion super capacitor positive electrode material and preparation method and application thereof Download PDFInfo
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- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 title claims abstract description 22
- 239000007774 positive electrode material Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 94
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000003365 glass fiber Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000006245 Carbon black Super-P Substances 0.000 claims description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 4
- 239000012300 argon atmosphere Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 4
- 229960001763 zinc sulfate Drugs 0.000 claims description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000000935 solvent evaporation Methods 0.000 claims description 3
- REOMUHZCSDTTMQ-UHFFFAOYSA-N [CH-]1C=CC=C1.[CH-]1C=CC=C1.[Fe+2].[C] Chemical compound [CH-]1C=CC=C1.[CH-]1C=CC=C1.[Fe+2].[C] REOMUHZCSDTTMQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910003471 inorganic composite material Inorganic materials 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 239000011368 organic material Substances 0.000 abstract description 12
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 10
- 239000011147 inorganic material Substances 0.000 abstract description 10
- 239000010405 anode material Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000001351 cycling effect Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 239000004570 mortar (masonry) Substances 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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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
- H01G11/22—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
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- 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
-
- 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
-
- 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
-
- 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 relates to the technical field of super capacitors, in particular to a zinc ion super capacitor positive electrode material and a preparation method and application thereof. The invention adopts a solution solvent or physical mixing method to realize the compounding of the organic material and the inorganic material, combines the advantages of the organic material and the inorganic material and overcomes the defects of the organic material and the inorganic material; the prepared ferrocene-activated carbon compound with the mass ratio of 1:1 has good electrochemical performance, and is shown in the condition that the current density is 0.1A g ‑1 Is provided with 112.2F g ‑1 The specific discharge capacity of the material reaches 40Wh kg ‑1 Energy density of 3.96kW kg ‑1 The power density of (d); and at 1A g ‑1 After 10000 cycles of circulation under the current density, the capacity is kept up to 74 percent; the problems of few types of anode materials, low specific capacity and poor cycling stability of the conventional zinc ion super capacitor are solved. The method is simple and easy to implement, and effectively saves time and process cost.
Description
Technical Field
The invention relates to the technical field of super capacitors, in particular to a zinc ion super capacitor positive electrode material and a preparation method and application thereof.
Background
With the increasing consumption of traditional energy and the limited storage amount of the traditional energy, the demand of people for sustainable energy storage devices becomes stronger and stronger. Among various sustainable energy storage devices, the super capacitor has the advantages of high charging and discharging speed, high power density and circulationGood stability, safety, reliability and the like. Among them, the zinc ion super capacitor proposed in recent years has a high theoretical capacity (820mAh g) -1 ) And low oxidation-reduction potential (-0.76V vs standard hydrogen electrode), environmental friendliness of aqueous electrolytes, and abundant zinc storage (about 9384 million tons as the current storage), and are favored by some researchers.
In view of the above advantages of zinc anodes, researchers have done much work in finding a cathode material adapted to a zinc anode. Compared with inorganic materials, organic materials have the unique advantages of high reaction rate, low cost, high capacity generated by multi-electron redox reaction and the like. However, organic materials have a problem of dissolution in organic electrolytes, which leads to a rapid drop in the energy density and power density of supercapacitors. In addition, organic materials typically have low electrical conductivity, which greatly increases internal resistance and decreases energy density. Therefore, the research of the high-performance zinc ion supercapacitor positive electrode material has become a key technical difficulty in the field.
Disclosure of Invention
Aiming at the problems or the defects, the invention provides a zinc ion super capacitor positive electrode material and a preparation method and application thereof, aiming at solving the problems of few types, low specific capacity and poor cycle stability of the conventional zinc ion super capacitor positive electrode material.
A zinc ion super capacitor positive electrode material is an active carbon-ferrocene organic/inorganic composite material, wherein the mass ratio of active carbon to ferrocene is 1:1, and the specific surface area is 961.601m 2 g -1 (ii) a When the current density is 0.1A g -1 While, have 112.2F g -1 The specific discharge capacity of the material reaches 40Wh kg -1 Energy density of 3.96kW kg -1 The power density of (d); and at 1A g -1 After 10000 cycles at current density, the capacity remained as high as 74%.
A preparation method of a zinc ion super capacitor positive electrode material comprises the following steps:
and step 1, completely dissolving ferrocene in a dichloromethane solution, and uniformly stirring.
And 2, dissolving activated carbon with the same mass as the ferrocene in the solution obtained in the step 1, uniformly stirring, heating in a water bath at 40 ℃, and evaporating the dichloromethane solvent until the dichloromethane solvent is complete.
And 3, drying the product of the solvent evaporation in the step 2 at 60-100 ℃ for at least 12 hours to obtain the ferrocene-activated carbon composite with the mass ratio of 1: 1.
Or:
and 2, uniformly grinding the material prepared in the step 1 to obtain the ferrocene-activated carbon hybrid material with the mass ratio of 1: 1.
Furthermore, the active carbon is sintered at the high temperature of 480 ℃ in the argon atmosphere before use to remove impurities adsorbed in the active carbon holes.
The application of the zinc ion super capacitor anode material comprises the following specific steps: weighing three materials of ferrocene-activated carbon composite, binder (polyvinylidene fluoride) and conductive carbon black Super P according to the mass ratio of 8:1:1, grinding the three materials uniformly, adding 1-methyl-2-pyrrolidone solution to obtain slurry with uniform components, coating the slurry on a cleaned substrate, drying, and slicing into electrode plates. Glass fiber filter paper (Glass fiber) is used as a diaphragm, metal zinc is used as a negative electrode, 2M zinc sulfate is used as electrolyte, and the Glass fiber filter paper and the metal zinc are combined with a ferrocene-activated carbon positive electrode plate in a mass ratio of 1:1 to form the water system zinc ion supercapacitor.
Ferrocene, which is typically an organometallic molecule with a fast reversible redox rate, is well known and has been widely used as a reference electrode in electroanalysis. Standard Rate constant for ferrocene at 3.7cm s -1 However, they are inferior in conductivity and cannot be used alone as an electrode material.
In conclusion, the ferrocene-activated carbon is compounded by the organic material and the inorganic material by adopting a solution solvent or a physical mixing method, so that the advantages of the organic material and the inorganic material are combined, and the defects of the organic material and the inorganic material are overcome; the prepared ferrocene-activated carbon compound with the mass ratio of 1:1 has good electrochemical performance and performanceWhen the current density is 0.1A g -1 Is provided with 112.2F g -1 The specific discharge capacity of the material reaches 40Wh kg -1 Energy density of 3.96kW kg -1 The power density of (d); and at 1A g -1 After 10000 cycles of circulation under the current density, the capacity is kept up to 74 percent; the problems of few types of anode materials, low specific capacity and poor cycling stability of the conventional zinc ion super capacitor are solved. The method is simple and easy to implement, and effectively saves time and process cost.
Drawings
FIG. 1 is a graph of pore size distribution of ferrocene-activated carbon composite of example 1;
FIG. 2 is N of ferrocene-activated carbon complex of example 1 2 An adsorption and desorption curve chart;
FIG. 3 is an SEM photograph of the ferrocene-activated carbon composite of example 1;
FIG. 4 shows the ferrocene-activated carbon composite of example 1 at a current density of 1Ag -1 A graph of cycle performance of;
FIG. 5 is a graph of rate performance of ferrocene-activated carbon composite of example 1 at different current densities;
FIG. 6 is a CV diagram of ferrocene-activated carbon composite of example 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
And 2, adding 200 mg of activated carbon sintered at 480 ℃ for 3 hours in an argon atmosphere of a tube furnace into the uniform solution obtained in the step 1, and stirring uniformly again to obtain a mixed solution. The resulting mixed solution was then heated in a water bath at 40 degrees celsius until the methylene chloride solvent was completely evaporated.
And 3, drying the product obtained in the step 2 and subjected to dichloromethane solvent evaporation in an oven at the temperature of 60 ℃ for 12 hours to obtain the ferrocene-activated carbon composite with the mass ratio of 1: 1.
FIG. 1 is a pore size distribution curve diagram of the ferrocene-activated carbon composite with the mass ratio of 1:1 obtained in the embodiment, and the graph shows that the sample has more micropores with the pore size of 1-2 nm.
FIG. 2 shows the N content of the ferrocene-activated carbon complex obtained in this example at a mass ratio of 1:1 2 An adsorption-desorption curve showing a typical type I nitrogen isothermal adsorption/desorption curve, and a specific surface area of 961.601m according to the BET method 2 g -1 。
FIG. 3 is an SEM image of the ferrocene-activated carbon composite material obtained in the example with the mass ratio of 1:1, and shows that the ferrocene-activated carbon composite has an agglomerated nanoparticle shape.
In order to test the specific capacity, rate capability, cycle performance and the like of the material, an electrode plate made of the ferrocene-activated carbon composite with the mass ratio of 1:1 obtained in the embodiment is used as the anode of a zinc ion supercapacitor to assemble the zinc ion supercapacitor. The process is as follows: 160mg of ferrocene-activated carbon composite, 20mg of binder polyvinylidene fluoride and 20mg of conductive carbon black Super P are respectively weighed according to the mass ratio of 8:1: 1. The three materials are uniformly ground in an agate mortar, and 0.4ml of 1-methyl-2-pyrrolidone solution is added to obtain slurry with uniform components. The slurry was then coated on a stainless steel sheet (thickness 244 μm) cleaned with absolute ethanol by an electrode coater, dried in a vacuum oven at 70 ℃ for 12 hours, and cut into electrode pieces with a diameter of 14 mm using a slicer. Glass fiber filter paper (Glass fiber) is used as a diaphragm, metal zinc is used as a negative electrode, 2M zinc sulfate is used as electrolyte, and ferrocene-activated carbon with the mass ratio of 1:1 is used as a positive electrode plate to jointly assemble the water system zinc ion supercapacitor.
The assembled water system zinc ion super capacitor is subjected to electrochemical performance test on a battery test system of CT2001A model and an electrochemical workstation of CHI660E model, and the voltage range of the assembled water system zinc ion super capacitor is 0.2-1.8V. The electrochemical performance is respectively tested and is between 0.1 and 5A g -1 Rate capability of (1) and at 1A g -1 Under high current density。
FIG. 4 shows the current density of 1A g of the ferrocene-activated carbon composite obtained in this example with a mass ratio of 1:1 -1 The graph shows that after 10000 cycles of cycling, the capacity remains as high as 74%.
FIG. 5 is a graph showing the rate performance of ferrocene-activated carbon composite with the mass ratio of 1:1 obtained in the present example under different current densities, wherein the graph shows that the current densities are 0.1, 0.2, 0.5, 1, 2, 5A g -1 The capacitors have 112.2, 93.4, 78.9, 72.7, 62.3 and 42.3F g -1 The discharge specific capacity of the composite material shows excellent rate capability.
FIG. 6 is a CV diagram of the ferrocene-activated carbon composite obtained in the present example with a mass ratio of 1:1, which shows that the reduction peak and the oxidation peak occur near 0.8V and 1.1V, respectively, indicating that the ferrocene-activated carbon composite has pseudo-capacitance behavior during the reaction process, which can contribute more capacity to a zinc ion supercapacitor.
Example 2:
And 2, putting the materials into an agate mortar, and grinding for 30 minutes to obtain the ferrocene-activated carbon hybrid material with uniformly dispersed components in a mass ratio of 1: 1.
Comparative example:
directly using ferrocene as the anode material of the zinc ion supercapacitor.
The assembly process of the zinc ion super capacitor is as follows: respectively weighing 160mg of ferrocene, 20mg of binder polyvinylidene fluoride and 20mg of conductive carbon black Super P according to the mass ratio of 8:1:1, uniformly grinding the three materials in an agate mortar, and adding 0.4ml of 1-methyl-2-pyrrolidone solution to obtain slurry with uniform components. The slurry was then coated on a stainless steel sheet (thickness 244 μm) cleaned with absolute ethanol by an electrode coater, dried in a vacuum oven at 70 ℃ for 12 hours, and cut into electrode pieces with a diameter of 14 mm using a slicer. Glass fiber filter paper (Glass fiber) is used as a diaphragm, metal zinc is used as a negative electrode, 2M zinc sulfate is used as electrolyte, and ferrocene is used as a positive electrode plate to jointly assemble the water system zinc ion super capacitor.
The comparative example uses ferrocene directly as the positive electrode material of a zinc ion supercapacitor. Compared with the ferrocene-activated carbon composite prepared in example 1, the ferrocene-activated carbon composite has lower specific surface area, and poorer rate capability and cycle stability. The maximum specific discharge capacity of the comparative example was 5.6Fg -1 Example 1 is 113Fg -1 (ii) a Compared with the ferrocene-activated carbon composite prepared in example 1 and having the mass ratio of 1:1, the ferrocene-activated carbon composite prepared in the example 1 has the advantages of lower specific surface area, poorer rate capability and poorer cycle stability.
In conclusion, the invention creatively projects the eyesight to the composition of the organic material and the inorganic material, combines the advantages of the organic material and the inorganic material by a composite method of solution solvent and physical mixing respectively and overcomes the defects of the organic material and the inorganic material, the prepared ferrocene-activated carbon composite with the mass ratio of 1:1 has large specific surface area and reasonable aperture distribution, provides more active sites for electrolyte ions, and thus realizes high specific capacity and stable long cycle; and the ferrocene-activated carbon compound has fast reaction kinetic speed, and can provide more capacity through oxidation-reduction reaction. Meanwhile, the preparation method is simple and feasible, and the time and the process cost are effectively saved.
Claims (4)
1. The positive electrode material of the zinc ion super capacitor is characterized in that:
is an organic/inorganic composite material of active carbon-ferrocene, wherein the mass ratio of the active carbon to the ferrocene is 1:1, and the specific surface area is 961.601m 2 g -1 (ii) a When the current density is 0.1A g -1 Is provided with 112.2F g -1 The specific discharge capacity of the material reaches 40Wh kg -1 Energy density of 3.96kW kg -1 The power density of (d); and at 1A g -1 After 10000 cycles at current density, the capacity remained as high as 74%.
2. The preparation method of the positive electrode material of the zinc ion supercapacitor according to claim 1, characterized by comprising the following steps:
step 1, completely dissolving ferrocene in a dichloromethane solution, and uniformly stirring;
step 2, dissolving activated carbon with the same mass as ferrocene in the solution obtained in the step 1, uniformly stirring, heating in water bath at 40 ℃, and evaporating the dichloromethane solvent until the dichloromethane solvent is completely evaporated;
step 3, drying the product of the solvent evaporation in the step 2 at 60-100 ℃ for at least 12 hours to obtain a ferrocene-activated carbon compound with the mass ratio of 1: 1;
or:
step 1, weighing activated carbon and ferrocene with the same mass;
and 2, uniformly grinding the material prepared in the step 1 to obtain the ferrocene-activated carbon hybrid material with the mass ratio of 1: 1.
3. The preparation method of the positive electrode material of the zinc ion supercapacitor according to claim 2, characterized by comprising the following steps: and before use, the activated carbon is sintered at 480 ℃ under the argon atmosphere to remove impurities adsorbed in the active carbon holes.
4. The application of the positive electrode material of the zinc ion supercapacitor as claimed in claim 1, wherein:
the ferrocene-activated carbon composite with the mass ratio of 1:1 is used as a positive electrode material and applied to a zinc ion super capacitor, and the specific method comprises the following steps:
weighing three materials of ferrocene-activated carbon composite, polyvinylidene fluoride and conductive carbon black Super P according to the mass ratio of 8:1:1, grinding the three materials uniformly, and adding 1-methyl-2-pyrrolidone solution to obtain slurry with uniform components; then coating the obtained slurry on a cleaned substrate, drying and slicing into electrode slices;
the water system zinc ion supercapacitor is assembled by taking glass fiber filter paper as a diaphragm, metal zinc as a negative electrode, 2M zinc sulfate as electrolyte and ferrocene-activated carbon with the mass ratio of 1:1 as a positive electrode plate.
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| CN115744867A (en) * | 2022-09-26 | 2023-03-07 | 江苏大学 | Preparation method and application of oxygen-containing functional group carbon material for zinc ion supercapacitor |
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| CN110176591A (en) * | 2019-05-31 | 2019-08-27 | 北京航空航天大学 | A kind of preparation method of water system zinc ion secondary cell and its anode based on organic electrode materials |
| CN111146007A (en) * | 2020-01-14 | 2020-05-12 | 安徽大学 | Zinc ion hybrid supercapacitor and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546652A (en) * | 2009-05-06 | 2009-09-30 | 北京科技大学 | Method for improving electric capacity of anode of electrochemical capacitor of organic system |
| CN107910195A (en) * | 2017-10-26 | 2018-04-13 | 刘小林 | A kind of hybrid super capacitor |
| CN110176591A (en) * | 2019-05-31 | 2019-08-27 | 北京航空航天大学 | A kind of preparation method of water system zinc ion secondary cell and its anode based on organic electrode materials |
| CN111146007A (en) * | 2020-01-14 | 2020-05-12 | 安徽大学 | Zinc ion hybrid supercapacitor and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115744867A (en) * | 2022-09-26 | 2023-03-07 | 江苏大学 | Preparation method and application of oxygen-containing functional group carbon material for zinc ion supercapacitor |
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