CN107731570A - A kind of method that Supercapacitor carbon surface chemistry group eliminates - Google Patents
A kind of method that Supercapacitor carbon surface chemistry group eliminates Download PDFInfo
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- CN107731570A CN107731570A CN201711187442.1A CN201711187442A CN107731570A CN 107731570 A CN107731570 A CN 107731570A CN 201711187442 A CN201711187442 A CN 201711187442A CN 107731570 A CN107731570 A CN 107731570A
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- carbon
- surface chemistry
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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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- 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
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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 present invention discloses a kind of method that Supercapacitor carbon surface chemistry group eliminates, quinhydrones is dissolved in the water, hydroquinone solution is made, then super capacitor powdered carbon is dissolved in hydroquinone solution, powdered carbon is set to keep suspending under magnetic agitation state, and heating water bath flows back, reaction is filtered after terminating, and obtained powdered carbon is further washed, produced after drying.This method is easy to operate, and cost is low, and pollution is small, is adapted to the product stable electrochemical property of preparation of industrialization, and capacitance fall-off is low, service life cycle length.
Description
Technical field
The present invention relates to a kind of method that Supercapacitor carbon surface chemistry group eliminates, more particularly, to the super electricity of organic system
Hold the removing method of the surface chemistry group of charcoal.
Background technology
Electrode of super capacitor active carbon with high specific surface area generally use KOH activation methods and metal catalytic high-temperature vapor
Activation method come produce prepare because the reaction is carried out in the case where there is oxygen atmosphere, therefore obtained activated carbon surface have largely contain
Oxygen functional group, it can occur to analyse the irreversible side reactions such as oxygen, liberation of hydrogen in electrode charge and discharge process, greatly affected capacitor
Capacitance and service life, make ultracapacitor hold at high price.Therefore, for the elimination of activated carbon surface oxygen-containing functional group
Technology turns into the capacitor that processability is stable, cost is cheap, so as to solve the key that electric automobile widely uses bottleneck problem
Technology.At present frequently with the minimizing technology of elimination activity carbon surface oxygen-containing functional group mainly have heat treating process and chemical treatment
Method.
(Ren little Meng, Wang Yuansheng, He Te graphene thermals reducing degree are to its electrochemistry by the little Meng etc. that appoints of naval engineering university
The influence [J] of performance) investigate influence of the different temperatures to graphene oxide reducing degree, the results showed that at 800 DEG C of heat
Managing obtained graphene has high specific capacitance value and good stability, while also demonstrates oxygen-containing functional group in heat treatment process
Removed according to C-O-C ＞ C-OH ＞ COOH order.
Wang Yongzhen of Institutes Of Technology Of Taiyuan etc. (Wang Yongzhen, Wang Yan, Han Fei, waits reductive heat treatments conductive to graphene film
Influence [J] novel charcoal materials of property, 2012,27 (4):266-270) research shows graphene oxide film in argon atmosphere
Graphene film is after heat treatment obtained, electric conductivity heat treatment temperature raises also constantly rise with temperature.Similarly, have one
Determining the active carbon electrode material of oxygen-containing functional group, after heat treatment can be also effectively reduced surface functional group under protective atmosphere outstanding
It is the relative concentration of carboxyl, so as to reduce leakage current, improves electrode stability.But the method needs extremely pure indifferent gas
Atmosphere, cost is high, and high-temperature heat treatment can cause hole to be shunk, and reduces specific surface area.
Chemical treatment rule often uses strong reductant hydrazine hydrate.The big grades of Jilin University Wang Xin (Wang Xinwei, Yang Yan, field is grand,
Deng online, 2011,6 (3) that are chemically synthesized and its characterize [J] Chinese science and technology papers of graphenes:187-190.) use water
Close hydrazine to reduce graphene oxide, substantially reduce the content of the oxygen-containing functional group in graphene oxide and defect etc..In
State patent CN201510827953 discloses a kind of method and capacitance carbon for efficiently removing Supercapacitor carbon surface chemistry group, profit
With atoms such as the oxygen of the active hydrogen reduction substitute activity carbon surface in hydrazine hydrate, nitrogen, so as to the chemical base of elimination activity carbon surface
Group, the Supercapacitor carbon product purified.But hydrazine hydrate price is high, and there is strong toxicity, using hydrazine hydrate as also
Former agent cost is high and easily causes secondary pollution.
In summary, Surface Groups of Active Carbons according to heating reducing process, it is necessary to high purity inert gas and high temperature, handling
With height, and treatment effect is bad.In addition high temperature can cause the merging of activated carbon hole, reduce specific surface area to a certain extent
And chemical property；Hydrazine hydrate is to reduce the most frequently used reagent of charcoal material surface oxy radical, but hydrazine hydrate price is high and malicious
Property is big, easily causes secondary pollution.
The content of the invention
Goal of the invention：The technical problems to be solved by the invention are in view of the shortcomings of the prior art, there is provided a kind of super electricity
Hold the method that carbon surface chemical group eliminates, simple compared to technical process for conventional method, cost is cheap, oxygen-containing functional group
Clearance is high, and stable electrochemical property, the Supercapacitor carbon product of service life length can be made.
In order to solve the above-mentioned technical problem, the invention discloses the side that a kind of Supercapacitor carbon surface chemistry group eliminates
Method, comprise the following steps：
Step 1：Quinhydrones is dissolved in the water, hydroquinone solution is made；
Step 2：Super capacitor powdered carbon is dissolved in the hydroquinone solution obtained by step 1, makes charcoal under magnetic agitation state
Powder is kept suspending, and heating water bath flows back, and reaction is filtered after terminating, obtained powdered carbon is further washed, dry after it is i.e. obtained
Eliminate the Supercapacitor carbon of surface functional group.
Wherein, the mass concentration of the hydroquinone solution is 5~20%.
Wherein, the mixing quality volume ratio of the super capacitor powdered carbon and hydroquinone solution is 1:20~25.
For comparing hydrazine hydrate, quinhydrones (hydroquinones) also has stronger reproducibility, and cheap and toxicity is lower, easily
It is oxidized to 1,4-benzoquinone.Quinhydrones is widely used in antioxidant at present, can effectively reduce heteropoly acid, therefore can be used for oxygen-containing official
The reduction that can be rolled into a ball.Therefore, elimination of the hydrazine hydrate applied to Supercapacitor carbon surface chemistry group is substituted with quinhydrones, life can be reduced
Cost is produced, reduces the risk of secondary pollution, and stable performance can also be made, the Supercapacitor carbon product of service life length.
Wherein, the advance mesh sieve of mistake 800 of the super capacitor powdered carbon.
Wherein, the temperature of the heating water bath backflow is 60~100 DEG C, and the reaction time is 3~12h, is passed through during reaction
Magnetic agitation makes powdered carbon keep suspended state.
Wherein, the washing is to clean powdered carbon with deionized water.
Wherein, the drying is 2.5~3.5h of drying process at 100~110 DEG C.
Wherein, the clearance of the Supercapacitor carbon surface chemistry group of obtained elimination surface functional group reach 99~
100%, by 5000 charge and discharge cycles, capacitance fade rate is less than 5%.
Beneficial effect：
1st, the application makes oxygen-containing functional group that reduction reaction occur using the strong reducing property of quinhydrones, so as to elimination activity carbon surface
Chemical group, the Supercapacitor carbon product purified.The reaction can reach very high oxygen-containing functional group elimination factor, be easy to advise
Modelling is promoted.
2nd, the advantages of the application method has cost low, and technique is simple, and chemical group removal efficiency is high, and easy to spread,
The Supercapacitor carbon stable electrochemical property of purifying, capacitance fall-off is low, service life cycle length.
Brief description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is the super capacitor active carbon surface group FT-IR spectrograms that this method is prepared.
Fig. 2 is the cycle performance for the super capacitor carbon resistance rod that this method is prepared.
Embodiment
According to following embodiments, the present invention may be better understood.Content described by embodiment is merely to illustrate this hair
It is bright, without should be also without limitation on the present invention described in detail in claims.
Embodiment 1
(1) super capacitor powdered carbon is crossed into 800 mesh sieves, weighs 50g, it is 5% that quinhydrones, which is dissolved in water mass concentration is made,
Hydroquinone solution；
(2) super capacitor powdered carbon is pressed into mass volume ratio 1:20 are dissolved in the hydroquinone solution obtained by step (1) rear water-bath
Flow back, make powdered carbon keep suspending under magnetic agitation 2000r/min states, and filtered in 60 DEG C of heating water bath 3h, reaction after terminating,
Obtained powdered carbon is further washed with deionized, taken out after drying 2.5h at 100 DEG C, is made and eliminates surface functional group
Supercapacitor carbon.
Embodiment 2
(1) super capacitor powdered carbon is crossed into 800 mesh sieves, weighs 50g, it is 10% that quinhydrones, which is dissolved in water mass concentration is made,
Hydroquinone solution；
(2) super capacitor powdered carbon is pressed into mass volume ratio 1:20 are dissolved in the hydroquinone solution obtained by step (1) rear water-bath
Flow back, make powdered carbon keep suspending under magnetic agitation 2000r/min states, and filtered in 60 DEG C of heating water bath 6h, reaction after terminating,
Obtained powdered carbon is further washed with deionized, taken out after drying 3h at 100 DEG C, is made and eliminates the super of surface functional group
Level capacitance carbon.
Embodiment 3
(1) super capacitor powdered carbon is crossed into 800 mesh sieves, weighs 50g, it is 15% that quinhydrones, which is dissolved in water mass concentration is made,
Hydroquinone solution；
(2) super capacitor powdered carbon is pressed into mass volume ratio 1:20 are dissolved in the hydroquinone solution obtained by step (1) rear water-bath
Flow back, make powdered carbon keep suspending under magnetic agitation 2000r/min states, and filtered in 90 DEG C of heating water bath 9h, reaction after terminating,
Obtained powdered carbon is further washed with deionized, taken out after drying 3.5h at 100 DEG C, is made and eliminates surface functional group
Supercapacitor carbon.
Embodiment 4
(1) super capacitor powdered carbon is crossed into 800 mesh sieves, weighs 50g, it is 20% that quinhydrones, which is dissolved in water mass concentration is made,
Hydroquinone solution；
(2) super capacitor powdered carbon is pressed into mass volume ratio 1:20 are dissolved in the hydroquinone solution obtained by step (1) rear water-bath
Flow back, make powdered carbon keep suspending under magnetic agitation 2000r/min states, and in 100 DEG C of heating water bath 9h, mistake after reaction terminates
Filter, obtained powdered carbon is further washed with deionized, and is taken out after drying 3h at 110 DEG C, is made and is eliminated surface functional group
Supercapacitor carbon.
Embodiment 5
(1) super capacitor powdered carbon is crossed into 800 mesh sieves, weighs 50g, it is 20% that quinhydrones, which is dissolved in water mass concentration is made,
Hydroquinone solution；
(2) super capacitor powdered carbon is pressed into mass volume ratio 1:25 are dissolved in the hydroquinone solution obtained by step (1) rear water-bath
Flow back, make powdered carbon keep suspending under magnetic agitation 2000r/min states, and in 100 DEG C of heating water bath 12h, mistake after reaction terminates
Filter, obtained powdered carbon is further washed with deionized, and is taken out after drying 3h at 105 DEG C, is made and is eliminated surface functional group
Supercapacitor carbon.
Obtained Supercapacitor carbon is subjected to surface chemistry group measure and cycle charge discharge electrometric determination, test condition is as follows, knot
Fruit is shown in Table 1.
The measure of surface chemistry group：Tested using U.S.'s Nicolet infrared spectrum analysers (types of FTIR 550), scanning range
For 500-4000cm-1Middle infrared.
The measure of cycle charge-discharge：Using the VMP3B-2x2 electrochemical workstations of French Bio-Logic companies production to system
Standby purifying Supercapacitor carbon carries out constant current charge-discharge performance test.
Table 1
The thinking and method of a kind of method eliminated the invention provides Supercapacitor carbon surface chemistry group, specific implementation
The method and approach of the technical scheme are a lot, and described above is only the preferred embodiment of the present invention, it is noted that for this skill
For the those of ordinary skill in art field, under the premise without departing from the principles of the invention, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.Each part being not known in the present embodiment can use existing
Technology is realized.
Claims (8)
1. a kind of method that Supercapacitor carbon surface chemistry group eliminates, it is characterised in that comprise the following steps：
Step 1：Quinhydrones is dissolved in the water, hydroquinone solution is made；
Step 2：Super capacitor powdered carbon is dissolved in the hydroquinone solution obtained by step 1, protects powdered carbon under magnetic agitation state
Hold suspension, and heating water bath flows back, reaction is filtered after terminating, by the washing of obtained powdered carbon, dry after elimination surface official is made
The Supercapacitor carbon that can be rolled into a ball.
2. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that step
The mass concentration of hydroquinone solution described in one is 5~20%.
3. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that step
The mixing quality volume ratio of super capacitor powdered carbon described in two and hydroquinone solution is 1:20~25.
4. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that described
The advance mesh sieve of mistake 800 of super capacitor powdered carbon.
5. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that described
The temperature of heating water bath backflow is 60~100 DEG C, and the reaction time is 3~12h.
6. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that described
Wash to clean powdered carbon with deionized water.
7. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1 eliminates, it is characterised in that described
Drying is 2.5~3.5h of drying process at 100~110 DEG C.
8. the method that a kind of Supercapacitor carbon surface chemistry group according to claim 1~7 any one eliminates, it is special
Sign is that the clearance of the Supercapacitor carbon surface chemistry group of obtained elimination surface functional group reaches 99~100%, warp
5000 charge and discharge cycles are crossed, capacitance fade rate is less than 5%.
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Cited By (5)
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| CN108439401A (en) * | 2018-04-19 | 2018-08-24 | 句容市盛达环保净化材料有限公司 | A kind of preparation method of activated carbon |
| CN108516549A (en) * | 2018-04-19 | 2018-09-11 | 句容市盛达环保净化材料有限公司 | A kind of preparation method of activated carbon |
| CN108751194A (en) * | 2018-04-19 | 2018-11-06 | 句容市盛达环保净化材料有限公司 | A kind of preparation method of activated carbon |
| CN110828189A (en) * | 2018-08-08 | 2020-02-21 | 丰田自动车株式会社 | Positive electrode for lithium ion capacitor, lithium ion capacitor using same, and method for producing same |
| CN112479209A (en) * | 2020-11-25 | 2021-03-12 | 河南省大潮炭能科技有限公司 | Low-temperature functional group removal by chemical method |
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| CN112479209A (en) * | 2020-11-25 | 2021-03-12 | 河南省大潮炭能科技有限公司 | Low-temperature functional group removal by chemical method |
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