CN110517900A - A kind of preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material - Google Patents
A kind of preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material Download PDFInfo
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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
- H01G11/24—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
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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
- H01G11/32—Carbon-based
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
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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
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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
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a kind of supercapacitor preparation methods of N doping low temperature carbon nanofiber electrode material, low temperature carbon nano-fiber (CNF) is prepared using CVD method first, then high-temperature activation is carried out to its surface, it reuses itrogenous organic substance and N doping and acidification is carried out to it, obtain the electrode material.Low temperature carbon nano-fiber has flourishing micropore and meso-hole structure in the electrode material, a large amount of electrolyte ion can be adsorbed, with height ratio capacity, and the nitrogen-containing functional group of carbon fibre material surface doping, improve material wetability, increase the utilization rate of specific surface area, but also change local charge density, electric conductivity is improved, nitrogen-containing functional group can also carry out redox reaction, fake capacitance is generated, capacitive property is further increased.Electrode material of the present invention has height ratio capacity, and splendid high rate performance and cyclical stability, synthesis technology is simple to operation, is not necessarily to electrostatic spinning, and low in cost, yield is high, has a good application prospect in super capacitor.
Description
Technical field
The invention belongs to super capacitor technology fields, and in particular to a kind of supercapacitor N doping cryogenic carbon Nanowire
Tie up the preparation method of electrode material.
Background technique
Due to the non-renewable energy resources such as petroleum worsening shortages, and the tail gas environmental pollution that burning petroleum generates is increasingly tight
Weight.Countries in the world researcher is finding clean energy resource and the more efficient new energy device using the energy.Supercapacitor
As novel energy storage device, with specific capacity is big, power density is high, have extended cycle life, operation temperature is wide and environmental-friendly
The features such as, it is widely used in electronics, the energy, transport, aerospace and national defence, it has also become the heat of global researcher's concern
Point.
Compared with conventional batteries, supercapacitor power density is high, but energy density is low, for develop high-energy density,
The electrode material of low cost and its better apply in supercapacitor are still a challenge.How energy density spy is improved
Property has become focus.By E=1/2CV2It is found that improve the energy density of capacitor (can C) from the capacitor for improving electrode material
Hand, therefore it is required that electrode material makees further research and development.Carbon material have high-specific surface area, controllable pore structure,
The features such as highly conductive and thermal conductivity, and active charcoal preparing process is simple, raw material sources are easy extensively, in electrochemical energy storage, inhales
Echo the fields extensive applications such as catalysis.
The specific surface area by increase active carbon main at present is to achieve the purpose that improve its capacitor.Such as patent of invention
CN201510004277.6 discloses a kind of preparation method of porous charcoal, is made with polycarboxylic acids and diamine or acetic anhydride and diamine
For reactant, reaction forms three-dimensional netted prepolymer in metal salt solution, thermally treated, obtains porous charcoal, obtained porous
The specific surface area of charcoal is 300 ~ 450 meters squared per grams, and when current density 0.1A/g, specific capacitance is only 189F/g, and chemical property is not
Good, although the specific surface area this is mainly due to porous carbon is larger, it is the too small ultrafine micropore in aperture that it, which is contributed biggish, and
Capacitor relies primarily on electrolyte ion and enters the hole formation electric double layer of active carbon to store charge, and electrolyte ion is difficult to
Into ultrafine micropore, the corresponding surface area of these micropores just becomes inactive surface product, so causing specific capacitance lower.
Carbon nano-fiber possesses good physical property and chemical property, for example has biggish specific surface area, higher
Mechanical strength and Young's modulus, and its electrical and thermal conductivity performance can be mentioned in the same breath with graphite, in the accumulator of flexible wearable
There is huge application prospect in part.As patent of invention CN201910010104.3 discloses a kind of self-supporting flexible super capacitor
Device electrode material and preparation method prepare the mixed solution of polyphosphazene and polymer first, mixed solution are then passed through electrostatic
Spinning process prepares polymer/polyphosphazene nano fibrous membrane, and obtained polymer/polyphosphazene nano fibrous membrane passes through high temperature cabonization
With activation of potassium hydroxide process, the self-supporting flexibility carbon nanofiber membrane of nitrogen phosphorus doping is obtained, specific capacitance is up to 176F/g；
Angew Chem.Int.Ed., 2012,51,5101-5105 disclose using Te nano wire as template, 180 DEG C in glucose solution
It carries out hydro-thermal reaction and obtains carbon nano-fiber, wherein Te nanometers of line template later periods need to etch removal, and carbon nano-fiber is assembled into
When electrode material for super capacitor, its specific capacity has 202F/g under 1A/g current density；J.Mater.Chem.A,2013,1,
9449-9455 is disclosed, using phenolic resin as presoma, SiO2For the mesoporous carbon nano-fiber of hard mold version hydrothermal synthesis, in 0.5A
Its specific capacity has 276F/g under g current density.But above method synthesis process is complicated, and energy consumption is big, at high cost, is not suitable for a wide range of
It promotes, specific capacity is not high when additionally as electrode material for super capacitor, and capacitor energy density is low, therefore limits its reality
Application.
Summary of the invention
In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a kind of supercapacitor N dopings
The preparation method of low temperature carbon nanofiber electrode material, solves existing electrode material there are specific capacitances low, and capacitor energy is close
It is complicated to spend low and synthesis process, energy consumption is big, problem at high cost.
To achieve the above object, the present invention adopts the following technical scheme: a kind of supercapacitor is received with N doping cryogenic carbon
The preparation method of rice fiber electrode material, comprising the following steps:
1) catalyst is placed in heating tube, is then warming up to 240 ~ 280 DEG C in a nitrogen atmosphere, then be passed through carbon-source gas, to
After reaction, it is cooled to room temperature under nitrogen protection, obtains low temperature carbon nano-fiber；
2) low temperature carbon nano-fiber and the highly basic mixing obtained step 1) carries out high-temperature activation, reaction knot under nitrogen protection
Shu Hou is cooled to room temperature, and after suction filtration, washing, drying, obtains activation carbon nano-fiber；
3) step 2 is obtained activation carbon nano-fiber to mix with polymer with nitrogen, is subsequently placed in heating tube, in nitrogen atmosphere
Under, the mixture is sintered, is placed in strong acid solution to after reaction, be cooled to room temperature, then by sintered product
Middle carry out acidification, then through suction filtration, washing, it is dry after to get arriving the N doping low temperature carbon nanofiber electrode material.
Further, the catalyst is nickel powder, cupric tartrate or ferrous tartrate.
Further, the carbon source is one of methane, ethylene, acetylene and propylene or a variety of.
Further, the mass ratio of the low temperature carbon nano-fiber and highly basic is 1:1 ~ 3.
Further, the activation temperature is 700~900 DEG C, and activation time is 1 ~ 2h.
Further, the activation carbon nano-fiber and carbon-nitrogen ratio in polymer with nitrogen are 1 ~ 3:1.
Further, the polymer with nitrogen be polyaniline, amino acid, melamine, chitosan or polyacrylamide in extremely
A kind of few compound.In this way, itrogen content of getter with nitrogen doped is relatively high, while polymer with nitrogen can also generate part charcoal and be fully utilized raising than electricity
Hold, to effectively improve the energy density of capacitor.
Further, the sintering temperature is 600~800 DEG C, and sintering time is 1 ~ 2h.
Further, the strong acid is concentrated nitric acid, and acidificatoin time is 1 ~ 2h.
The present invention also provides a kind of lithium battery, the supercapacitor including above method preparation is received with N doping cryogenic carbon
Rice fiber electrode material.
Compared with prior art, the invention has the following beneficial effects:
1, N doping low temperature carbon nanofiber electrode material prepared by the present invention prepares cryogenic carbon using low temperature deposition methods first and receives
Rice fiber, obtained low temperature carbon nano-fiber have helicoidal structure (mainly by wrapping up between amorphous carbon and multilayer Fullerene layer
Body composition) feature, this structure is conducive to electrolyte ion and comes into full contact with electrode material, and electrolyte ion can be effectively whole
It is transmitted in a electrode, increases the storage of charge.In addition, this structure can not only make carbon fiber have bigger specific surface area,
The advantages that smaller density, good thermal conductivity, and its nanoscale graphite lamella can be distorted because of spiral, in spiral
Micro-crack can be generated simultaneously and form defect, to greatly improve its specific surface area, thus have good chemical property,
Further increase specific capacitance.Then under highly basic effect, high-temperature activation is carried out to its surface, it is living to carry out high temperature relative to room temperature
Change, be conducive to reach deep etching, avoid generating ultrafine micropore, gives full play to and utilize material property, not only mentioned by etching
The high specific surface area of low temperature carbon nano-fiber, and activate cryogenic carbon nanofiber surface active by acidification, favorably
In improving later period N doping amount, and then offer fake capacitance, the energy density of capacitor can effectively improve.
2, in the N doping low temperature carbon nanofiber electrode material that the present invention obtains, low temperature carbon nano-fiber has flourishing
Micropore and meso-hole structure can adsorb a large amount of electrolyte ion, have height ratio capacity, and carbon nano-fiber materials surface is mixed
Material wetability can be improved in miscellaneous nitrogen-containing functional group, increases the utilization rate of specific surface area, but also can change partial charge
Density improves electric conductivity, and nitrogen-containing functional group can also carry out redox reaction, generates fake capacitance, further increases capacitive character
Energy.Electrode material prepared by the present invention specific capacitance value under 1 A/g current density is mixed up to 257.02 F/g compared to without nitrogen
Miscellaneous carbon nano-fiber gas specific capacity improves 20%, even if specific capacitance can still remain under the high current density of 50 A/g
168.77 F/g simultaneously keep 65.66 %, have height ratio capacity, splendid high rate performance and cyclical stability, this is attributed to carbon and receives
The specific surface area of rice fiber itself is with regard to bigger, along with highly basic increases its surface holes to the etching on its surface in activation process
Gap rate makes to form stable interfacial film between electrolyte and electrode, ion be able to achieve on interface it is more stable it is reversible move into or
Abjection has the preferable structural stability of foot and better practical application, has as the electrode material of super capacitor
Good application prospect.
3, synthesis technology of the present invention is simple to operation, is not necessarily to electrostatic spinning, and low in cost, and yield is high, heavy in chemistry
Temperature is low in product reaction process, and energy consumption is few, is not necessarily to subsequent processing process, is more suitable for industrialization promotion.
Detailed description of the invention
Fig. 1 is the SEM figure of present invention preparation activation carbon nano-fiber；
Fig. 2 is the Raman map of N doping low temperature carbon nanofiber electrode material prepared by embodiment 1 ~ 3；
Fig. 3 is the chemical property comparison of N doping low temperature carbon nanofiber electrode material prepared by embodiment 1 ~ 3；Scheming a is electricity
GCD curve when current density is 1 A/g, specific capacitance when figure b be current density is 1 A/g.
Specific embodiment
Invention is further described in detail with attached drawing combined with specific embodiments below.Not to experiment in following embodiment
What method was illustrated, be routine operation, and agents useful for same is common commercially available.
One, the preparation method of a kind of supercapacitor N doping low temperature carbon nanofiber electrode material
Embodiment 1
1) powder catalyst cupric tartrate is placed in quartz boat, is uniformly paved, then placed it in heating tube, in high pure nitrogen
Under protection, temperature is raised to 240 DEG C, is passed through acetylene, and keep the temperature 1h, to after reaction, cool down room temperature processed under nitrogen protection,
Sample is taken out, low temperature carbon nano-fiber is obtained.
2) the low temperature carbon nano-fiber that precise step 1) obtains is that 1:1 is mixed with KOH in mass ratio, in high pure nitrogen
After being warming up to 800 DEG C of activated 1h under protection, a large amount of distilled water are added, precipitating are obtained by filtration by sand core funnel, and will be described
Precipitating distilled water and dehydrated alcohol clean repeatedly, until solution is in neutrality, finally in a vacuum drying oven 80 DEG C be dried, obtain
To activation carbon nano-fiber.
3) step 2 is obtained activation carbon nano-fiber and melamine polymer with nitrogen by carbon-nitrogen ratio is that 1:1 is put into quartz
It in boat, then places it in heating tube, leads to nitrogen, remove the air in pipe, 600 DEG C are warming up to, and keep the temperature 1h, to the end of reacting
Afterwards, it is cooled to room temperature, takes out sample, obtain presoma.
4) presoma made from step 3) is transferred in beaker, carries out acidification 2h with suitable concentrated nitric acid, finally
Precipitating is obtained by filtration by sand core funnel, then by it is described precipitating and cleaned repeatedly with distilled water and dehydrated alcohol, until solution is in
Neutrality, then 80 DEG C of dryings are placed in a vacuum drying oven, obtain the N doping low temperature carbon nano-fiber of high-purity.
Embodiment 2
1) powder catalyst cupric tartrate is placed in quartz boat, is uniformly paved, then placed it in heating tube, in high pure nitrogen
Under protection, temperature is raised to 260 DEG C, is passed through acetylene, and keep the temperature 1h, to which after reaction, cooling room temperature processed, takes under nitrogen protection
Sample out obtains low temperature carbon nano-fiber.
2) the low temperature carbon nano-fiber that precise step 1) obtains is that 1:2 is mixed with KOH in mass ratio, in high pure nitrogen
After being warming up to 800 DEG C of activated 3h under protection, a large amount of distilled water are added, precipitating are obtained by filtration by sand core funnel, and will be described
Precipitating distilled water and dehydrated alcohol clean repeatedly, until solution is in neutrality, finally in a vacuum drying oven 80 DEG C be dried, obtain
To activation carbon nano-fiber.
3) step 2 is obtained activation carbon nano-fiber and melamine polymer with nitrogen by carbon-nitrogen ratio is that 2:1 is put into quartz
It in boat, then places it in heating tube, leads to nitrogen, remove the air in pipe, 800 DEG C are warming up to, and keep the temperature 1h, to the end of reacting
Afterwards, it is cooled to room temperature, takes out sample, obtain presoma.
4) presoma made from step 3) is transferred in beaker, carries out acidification 2h with suitable concentrated nitric acid, finally
Precipitating is obtained by filtration by sand core funnel, then by it is described precipitating and cleaned repeatedly with distilled water and dehydrated alcohol, until solution is in
Neutrality, then 80 DEG C of dryings are placed in a vacuum drying oven, obtain the N doping low temperature carbon nano-fiber of high-purity.
Embodiment 3
1) powder catalyst cupric tartrate is placed in quartz boat, is uniformly paved, then placed it in heating tube, in high pure nitrogen
Under protection, temperature is raised to 280 DEG C, is passed through acetylene, and keep the temperature 1h, to which after reaction, cooling room temperature processed, takes under nitrogen protection
Sample out obtains low temperature carbon nano-fiber.
2) the low temperature carbon nano-fiber that precise step 1) obtains is that 1:3 is mixed with KOH in mass ratio, in high pure nitrogen
After being warming up to 800 DEG C of activated 2h under protection, a large amount of distilled water are added, precipitating are obtained by filtration by sand core funnel, and will be described
Precipitating distilled water and dehydrated alcohol clean repeatedly, until solution is in neutrality, finally in a vacuum drying oven 80 DEG C be dried, obtain
To activation carbon nano-fiber.
3) step 2 is obtained activation carbon nano-fiber and melamine polymer with nitrogen by carbon-nitrogen ratio is that 3:1 is put into quartz
It in boat, then places it in heating tube, leads to nitrogen, remove the air in pipe, 700 DEG C are warming up to, and keep the temperature 1h, to the end of reacting
Afterwards, it is cooled to room temperature, takes out sample, obtain presoma.
4) presoma made from step 3) is transferred in beaker, carries out acidification 2h with suitable concentrated nitric acid, finally
Precipitating is obtained by filtration by sand core funnel, then by it is described precipitating and cleaned repeatedly with distilled water and dehydrated alcohol, until solution is in
Neutrality, then 80 DEG C of dryings are placed in a vacuum drying oven, obtain the N doping low temperature carbon nano-fiber of high-purity.
Comparative example 1
Reaction temperature is 700 DEG C in step 1), and other steps is the same as embodiment 1.
Comparative example 2
Polymer with nitrogen replaces with ammonia in step 3), and other steps is the same as embodiment 1.
Two, performance verification
1, the carbon nano-fiber of N doping prepared by embodiment 1 ~ 3 and comparative example 1 ~ 2 is carried out under different current densities than electricity
Hold analysis.
Specific capacitance of the different nitrogen-doped carbon nano-fibers of table 1 under different current densities
| 1 A·g-1 | 10 A·g-1 | 50 A·g-1 | 1~10 A·g-1Conservation rate | 1~50 A·g-1Conservation rate | |
| CNF | 214.85 | 175 | 135 | 81.45 % | 62.83 % |
| Embodiment 1 | 232.6 | 203.88 | 161.01 | 87.65 % | 69.22 % |
| Embodiment 2 | 257.02 | 221.6 | 168.77 | 86.22 % | 65.66 % |
| Embodiment 3 | 244.44 | 196.82 | 99.8 | 80.52 % | 40.91 % |
| Comparative example 1 | 231.50 | 156.40 | - | 65.85 % | - |
| Comparative example 2 | 180.00 | 140.00 | - | 77.78% | - |
Note: "-" indicate without.
As it can be seen from table 1 compared with comparative example, N doping low-temperature nano coiled carbon fibers electrode material that the present invention obtains
Specific capacitance value is up to 257.02 F/g under 1 A/g current density for material, compared to the low temperature carbon nano-fiber without N doping
(CNF), capacity boost 20%, even if specific capacitance can still remain with 168.77 F/ under the high current density of 50 A/g
g-And 65.66 % are kept, there is height ratio capacity, splendid high rate performance and cyclical stability, this is mainly due to cryogenic carbons to receive
Rice fiber has the micropore and meso-hole structure of helical structure and prosperity, can adsorb a large amount of electrolyte ion, has Fabrication of High Specific Capacitance
Amount, and material wetability can be improved in the nitrogen-containing functional group of carbon fibre material surface doping using melamine, increase ratio
The utilization rate of surface area, but also can change local charge density, electric conductivity is improved, nitrogen-containing functional group can also be aoxidized
Reduction reaction generates fake capacitance, further increases capacitive property.
2, activation carbon nano-fiber prepared by the present invention is observed under a scanning electron microscope, as a result as shown in Figure 1.
It can be seen from the figure that carbon nano-fiber has smooth surface, and diameter is evenly distributed, this is because low
Under temperature with chemical vapour deposition technique prepare gained, part have micro- helical structure, this structure be conducive to electrolyte ion with
Electrode material comes into full contact with, and electrolyte ion can be transmitted effectively in entire electrode, increases the storage capacity of charge, and then improve
The specific capacity of supercapacitor.
3, the N doping low temperature carbon nano-fiber for preparing embodiment 1 ~ 3 carries out Raman spectrum analysis, as a result such as Fig. 2 institute
Show.
Figure it is seen that the peak D appears in 1320 cm-1~1350 cm-1Between, the peak G appears in 1560 cm-1~1590
cm-1Between.By observation and analysis, doping nitrogen can effectively increase the I of carbon fiberDValue and IGValue, but with the increase of carbon-nitrogen ratio,
The I of carbon fiberDValue can be continuously increased, but IGValue but can constantly reduce, this is conducive to the promotion of graphite lattice defect level, thus
Improve the electric conductivity of material.
4, the N doping low temperature carbon nano-fiber for preparing embodiment 1 ~ 3 carries out electro-chemical test analysis, as a result such as Fig. 3 institute
Show.
From figure 3, it can be seen that specific capacitance has biggish promotion, wherein nitrogen carbon for the material for carrying out nitrating
When than for 2:1, specific capacitance is higher.This is because graphite lattice defect can be made to increase, mentioned after nitrogen atom doping enters graphite lattice
Its high density, the electric conductivity of carbon fiber can be significantly improved as electronq donor, but can hinder when defect reaches a certain level
The migration of electronics in the material, has large effect to specific capacitance.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of supercapacitor preparation method of N doping low temperature carbon nanofiber electrode material, which is characterized in that including
Following steps:
1) catalyst is placed in heating tube, is then warming up to 240 ~ 280 DEG C in a nitrogen atmosphere, then be passed through carbon-source gas, to
After reaction, it is cooled to room temperature under nitrogen protection, obtains low temperature carbon nano-fiber；
2) low temperature carbon nano-fiber and the highly basic mixing obtained step 1) carries out high-temperature activation, reaction knot under nitrogen protection
Shu Hou is cooled to room temperature, and after suction filtration, washing, drying, obtains activation carbon nano-fiber；
3) step 2 is obtained into activation carbon nano-fiber and polymer with nitrogen is mixed to get mixture, then place it in heating tube
In, in a nitrogen atmosphere, the mixture is sintered, to after reaction, be cooled to room temperature, then by sintered product
Be placed in strong acid solution and carry out acidification, then through suction filtration, washing, it is dry after to get arriving the N doping cryogenic carbon Nanowire
Tie up electrode material.
2. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the catalyst is nickel powder, cupric tartrate or ferrous tartrate.
3. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the carbon source is one of methane, ethylene, acetylene and propylene or a variety of.
4. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the mass ratio of the low temperature carbon nano-fiber and highly basic is 1:1 ~ 3.
5. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the activation temperature is 700 ~ 900 DEG C, and activation time is 1 ~ 3h.
6. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, carbon-nitrogen ratio is 1 ~ 3:1 in the activation carbon nano-fiber and polymer with nitrogen.
7. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
Be characterized in that, the polymer with nitrogen be one of polyaniline, amino acid, melamine, chitosan and polyacrylamide or
It is a variety of.
8. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the sintering temperature is 600 ~ 800 DEG C, and sintering time is 1 ~ 2h.
9. the preparation method of supercapacitor N doping low temperature carbon nanofiber electrode material according to claim 1,
It is characterized in that, the strong acid is concentrated nitric acid, and acidificatoin time is 1 ~ 2h.
10. a kind of capacitor, the supercapacitor N doping cryogenic carbon including the method preparation of any one of claim 1 ~ 9
Nano-fiber electrode material.
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| CN113113599A (en) * | 2021-04-19 | 2021-07-13 | 四川轻化工大学 | Preparation method and application of nitrogen-doped self-supporting nanofiber membrane |
| WO2022236843A1 (en) * | 2021-05-11 | 2022-11-17 | 苏州大学 | Composite porous carbon material and preparation method therefor |
| CN113363083A (en) * | 2021-06-01 | 2021-09-07 | 安徽科技学院 | Carbon nanofiber composite material with three-dimensional hierarchical structure and preparation method thereof |
| CN113363083B (en) * | 2021-06-01 | 2022-04-12 | 安徽科技学院 | Carbon nanofiber composite material with three-dimensional hierarchical structure and preparation method thereof |
| CN114974924A (en) * | 2021-06-01 | 2022-08-30 | 安徽科技学院 | Preparation method of carbon nanofiber with all-solid structure |
| CN114974924B (en) * | 2021-06-01 | 2023-04-25 | 安徽科技学院 | Preparation method of carbon nanofiber with full solid structure |
| CN113622055A (en) * | 2021-08-17 | 2021-11-09 | 四川轻化工大学 | Sodium-ion battery negative electrode material and preparation method thereof |
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