CN108172408A - A kind of NH2-rGO/MnO2Composite material, preparation method and application - Google Patents
A kind of NH2-rGO/MnO2Composite material, preparation method and application Download PDFInfo
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- CN108172408A CN108172408A CN201711446382.0A CN201711446382A CN108172408A CN 108172408 A CN108172408 A CN 108172408A CN 201711446382 A CN201711446382 A CN 201711446382A CN 108172408 A CN108172408 A CN 108172408A
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- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 239000007864 aqueous solution Substances 0.000 claims abstract description 26
- 239000000243 solution Substances 0.000 claims abstract description 23
- 239000008367 deionised water Substances 0.000 claims abstract description 20
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 19
- 239000010439 graphite Substances 0.000 claims abstract description 19
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 17
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 15
- 239000013049 sediment Substances 0.000 claims abstract description 14
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 235000019441 ethanol Nutrition 0.000 claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 12
- 238000002604 ultrasonography Methods 0.000 claims abstract description 11
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000006268 reductive amination reaction Methods 0.000 claims abstract description 6
- 239000000376 reactant Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000005576 amination reaction Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 239000003575 carbonaceous material Substances 0.000 description 5
- 239000002322 conducting polymer Substances 0.000 description 5
- 229920001940 conductive polymer Polymers 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- -1 graphene compound Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011807 nanoball Substances 0.000 description 1
- 239000002057 nanoflower Substances 0.000 description 1
- 239000002077 nanosphere Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- 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, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/46—Metal oxides
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Nanotechnology (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
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- Inorganic Compounds Of Heavy Metals (AREA)
- Carbon And Carbon Compounds (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a kind of NH2‑rGO/MnO2Composite material, preparation method and application prepare graphite oxide GO, and it is spare that graphite oxide obtained is made into aqueous solution；By graphite oxide aqueous solution and dimethylformamide stirring in water bath, then p-phenylenediamine solution is added in above-mentioned reaction, temperature increases, it is refluxed, obtained reactant ethyl alcohol and deionized water are washed until the colourless neutrality of supernatant, obtained sediment is distributed in deionized water, obtains reductive amination graphene oxide NH2RGO aqueous solutions；Using hydro-thermal method by potassium permanganate KMnO4With NH obtained2RGO aqueous solutions are mixed, ultrasound, are then transferred into reaction kettle, and NH is made2‑rGO/MnO2Material.Amination graphene prepared by the present invention can improve the electric conductivity of manganese dioxide, the presence of amino can improve the electro-chemical activity of material, increase its wellability with electrolyte, the microscopic appearance of manganese dioxide can be regulated and controled simultaneously, increase specific surface area, material scatter is improved, so as to improve electrochemical capacitance performance on the whole.
Description
Technical field
Preparation method more particularly to a kind of NH the present invention relates to a kind of capacitor material2-rGO/MnO2Composite wood
Material, preparation method and application.
Background technology
The energy is the precious resources that people depend on for existence, consumes, finds with the acceleration being continuously increased with the energy of population
New energy and energy storage device are that people solve the problems, such as one of effective way of lack of energy.People substitute the new of internal combustion engine in research
During type energy source device, hybrid power, fuel cell, chemical cell product and the research and development of application have been carried out,
Achieve certain effect.But since their intrinsic service lifes are short, temperature characterisitic is poor, chemical cell pollution environment, are
The deadly defects such as system is complicated, cost is high, never good solution.Ultracapacitor is as a kind of new accumulator
Part possesses many merits such as energy density is high, have extended cycle life, the charging time is short, can partly or entirely substitute traditional change
Battery is learned for the traction power source of vehicle and starts the energy, and with purposes more extensive than traditional chemical cell.
The material of ultracapacitor mainly includes carbon material, conducting polymer and transition metal oxide three classes.Carbon material
Have the advantages that large specific surface area, internal resistance are small, cheap, stability is good.Common carbon material includes：Carbon black, carbon nanotube,
Carbon nano-fiber etc., but the specific capacitance of carbon material is smaller, energy density is relatively low.The carbon that the hot spot studied at present is mainly ordered into
The composite material of nano-tube array and graphene.
Conducting polymer mainly includes polypyrrole, polyaniline, three kinds of polythiophene.The specific capacitance of conducting polymer is bigger,
It is at low cost；Shortcoming is less varieties, larger as internal resistance during the electrode material of ultracapacitor directly by the use of conducting polymer, and electrode
Short life.Research direction is to develop new conducting polymer at present, makes composite material and improves overall performance.
Transition metal oxide has high specific capacitance (being 10~100 times of carbon material) and good stability, still
The shortcomings that poorly conductive, compact structure, makes its overall performance poor.Representative material has MnO2、Co3O4, NiO etc..Mesh
Preceding research direction is to regulate and control its microscopic appearance by different preparation methods, obtains nanosphere, nano flower, nanometer rods etc., to increase
Bigger serface, while be conducive to the transmission of ion.
Wherein, manganese oxide is cheap, possesses the theoretical specific capacitance of superelevation, and stability is good.It has achieved at present very big
Progress, researcher is try to a variety of methods to improve its electrochemical capacitance performance.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of NH2-rGO/MnO2Composite material, preparation
Method and application can improve the electric conductivity and dispersibility of entire composite material.
The present invention is achieved by the following technical solutions, a kind of NH of the invention2-rGO/MnO2The preparation of composite material
Method includes the following steps：
(1) graphite oxide GO is prepared using Hummers methods, it is spare that graphite oxide obtained is made into aqueous solution；
(2) by graphite oxide aqueous solution and dimethylformamide, stirring in water bath 1~1.5 is small under conditions of 30~40 DEG C
When, then p-phenylenediamine solution is added in above-mentioned reaction, temperature is increased to 70~90 DEG C, is refluxed 9~11 hours, will
To reactant ethyl alcohol and deionized water wash to supernatant it is colourless it is neutral until, obtained sediment is distributed to deionization
In water, the reductive amination graphene oxide NH of a concentration of 0.1~1g/L is obtained2- rGO aqueous solutions；
(3) using hydro-thermal method by potassium permanganate KMnO4With NH obtained2- rGO aqueous solutions are mixed, ultrasound, Ran Houzhuan
It moves on in reaction kettle, NH is made2-rGO/MnO2Material.
In the step (1), graphite oxide is prepared by improved Hummers methods, the graphite oxide solution that will be obtained
With 1:1 ethyl alcohol and deionized water cleans colourless to supernatant, is dispersed in deionized water, obtains the oxidation of 0.5~1.0g/L
Graphite aqueous solution.
In the step (2), a concentration of 3g/L of p-phenylenediamine solution is ultrasonically treated 30~60 points under ultrasound environments
Clock.
In the step (3), by potassium permanganate be added in deionized water with 0.025mol/L potassium permanganate it is water-soluble
Liquid takes the NH of 10mL2Ultrasound 30 minutes or more after-rGO aqueous solutions are mixed with 40mL potassium permanganate solutions, is transferred to reaction kettle
Middle carry out hydro-thermal reaction washs obtained sediment with deionized water and ethanol solution until supernatant is colourless respectively, will
Sediment is dried in vacuo in the environment of 60 DEG C, and NH is made in grinding2-rGO/MnO2Powder.
In the step (3), the temperature of the hydro-thermal reaction is 180 DEG C, and the time is 15 hours.
A kind of NH made from preparation method as mentioned2-rGO/MnO2Composite material.
A kind of NH2-rGO/MnO2Application of the composite material in capacitor material is prepared.
The present invention has the following advantages compared with prior art：Amination graphene prepared by the present invention can improve titanium dioxide
The electric conductivity of manganese, the presence of amino can improve the electro-chemical activity of material, increase its wellability with electrolyte, while can
Regulate and control the microscopic appearance of manganese dioxide, increase specific surface area, improve material scatter, so as to improve electrochemical capacitance performance on the whole,
NH2-rGO/MnO2Composite material shows this material for the compound of manganese dioxide and amination graphene by XRD and sem analysis
Material, composite material have high specific capacitance and good microscopic appearance, in multiple charge-discharge test, show excellent follow
Ring stability.The amination graphene met in material has regulating and controlling effect to the growth of manganese dioxide, makes manganese dioxide particle
Agglomeration reduces, and improves the electric conductivity of material, has complementary advantages, with common graphene and manganese dioxide composite material phase
Than with higher specific capacitance, pattern more rule, manufacture craft is simple.
Description of the drawings
Fig. 1 is the SEM pictures of composite material produced by the present invention；
Fig. 2 is the XRD diagram of composite material produced by the present invention；
Fig. 3 is the capacitive property figure of composite material produced by the present invention.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
The preparation process of the present embodiment is as follows：
(1) graphite oxide is prepared by improved Hummers methods, by obtained graphite oxide solution with 1:1 ethyl alcohol
It is cleaned with deionized water colourless to supernatant, is dispersed in deionized water, obtains the graphite oxide aqueous solution of 0.5~1.0g/L；
(2) by the graphite oxide aqueous solution 20mL of 1g/L and dimethylformamide 50mL under conditions of 35 DEG C stirring in water bath
1 hour, then the p-phenylenediamine solution of 100mL being added in above-mentioned reaction, temperature is increased to 80 DEG C, is refluxed 10 hours,
Obtained reactant ethyl alcohol and deionized water are washed until the colourless neutrality of supernatant, obtained sediment is distributed to
In ionized water, the reductive amination graphene oxide NH of a concentration of 1g/L is obtained2- rGO aqueous solutions；The concentration of p-phenylenediamine solution
For 3g/L, it is ultrasonically treated 30~60 minutes under ultrasound environments；
(3) by 0.395g potassium permanganate be added in the deionized water of 100mL with 0.025mol/L potassium permanganate water
Solution takes the NH of 10mL2Ultrasound 30 minutes or more after-rGO aqueous solutions are mixed with 40mL potassium permanganate solutions, is transferred to reaction
Hydro-thermal reaction is carried out in kettle, the temperature of hydro-thermal reaction is 180 DEG C, and the time is 15 hours, by obtained sediment spend respectively from
Sub- water and ethanol solution are washed until supernatant is colourless, and sediment is dried in vacuo in the environment of 60 DEG C, are ground, and are made
NH2-rGO/MnO2Powder.
Embodiment 2
The present embodiment by 0.395g potassium permanganate be added in the deionized water of 100mL with 0.025mol/L permanganic acid
Aqueous solutions of potassium takes the reductive amination graphene oxide NH of a concentration of 0.1g/L of 10mL2- rGO aqueous solutions and 40mL permanganic acid
Ultrasound 30 minutes or more after aqueous solutions of potassium mixing, is transferred in reaction kettle and carries out hydro-thermal reaction, the temperature of hydro-thermal reaction is 180
DEG C, the time is 15 hours, and obtained sediment is washed with deionized water and ethanol solution until supernatant is colourless respectively, will
Sediment is dried in vacuo in the environment of 60 DEG C, and NH is made in grinding2-rGO/MnO2Powder.
Other embodiment and embodiment 1 are identical.
Embodiment 3
The present embodiment by 0.395g potassium permanganate be added in the deionized water of 100mL with 0.025mol/L permanganic acid
Aqueous solutions of potassium takes the reductive amination graphene oxide NH of a concentration of 0.5g/L of 10mL2- rGO aqueous solutions and 40mL permanganic acid
Ultrasound 30 minutes or more after aqueous solutions of potassium mixing, is transferred in reaction kettle and carries out hydro-thermal reaction, the temperature of hydro-thermal reaction is 180
DEG C, the time is 15 hours, and obtained sediment is washed with deionized water and ethanol solution until supernatant is colourless respectively, will
Sediment is dried in vacuo in the environment of 60 DEG C, and NH is made in grinding2-rGO/MnO2Powder.
Other embodiment and embodiment 1 are identical.
The composite material that embodiment 1 is prepared carries out sem analysis as shown in Figure 1, it can be seen from the figure that composite wood
The microscopic appearance of material is good, uniform sequential, while the dispersibility of manganese dioxide is more preferable, is attached to shown in figure for MnO2 nanometer sheets
Formed bouquet is grown in amination graphene, it can abbreviation manganese dioxide nano ball.
The composite material that Examples 1 to 3 is prepared carries out XRD analysis as shown in Fig. 2, it can be seen from the figure that institute
The composite material of acquisition is manganese dioxide and amination graphene compound, apparent manganese dioxide diffraction maximum occurs in figure, by
It is less in graphene content, so being blanked.
The composite material that embodiment 1 is prepared carries out capacity measurement as shown in figure 3, it can be seen from the figure that when electricity
When current density is 1A/g, the charge and discharge time of ultracapacitor reaches 300s.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of NH2-rGO/MnO2The preparation method of composite material, which is characterized in that include the following steps：
(1) graphite oxide GO is prepared using Hummers methods, it is spare that graphite oxide obtained is made into aqueous solution；
(2) by graphite oxide aqueous solution and dimethylformamide under conditions of 30~40 DEG C stirring in water bath 1~1.5 hour, so
P-phenylenediamine solution is added in above-mentioned reaction afterwards, temperature is increased to 70~90 DEG C, is refluxed 9~11 hours, by what is obtained
Reactant ethyl alcohol and deionized water are washed until the colourless neutrality of supernatant, and obtained sediment is distributed to deionized water
In, the reductive amination graphene oxide NH of a concentration of 0.1~1g/L of acquisition2- rGO aqueous solutions；
(3) using hydro-thermal method by potassium permanganate KMnO4With NH obtained2- rGO aqueous solutions are mixed, ultrasound, are then transferred into
In reaction kettle, NH is made2-rGO/MnO2Material.
2. a kind of NH according to claim 12-rGO/MnO2The preparation method of composite material, which is characterized in that the step
Suddenly in (1), graphite oxide is prepared by improved Hummers methods, by obtained graphite oxide solution with 1:It 1 ethyl alcohol and goes
Ionized water cleans colourless to supernatant, is dispersed in deionized water, obtains the graphite oxide aqueous solution of 0.5~1.0g/L.
3. a kind of NH according to claim 12-rGO/MnO2The preparation method of composite material, which is characterized in that the step
Suddenly in (2), a concentration of 3g/L of p-phenylenediamine solution is ultrasonically treated 30~60 minutes under ultrasound environments.
4. a kind of NH according to claim 12-rGO/MnO2The preparation method of composite material, which is characterized in that the step
Suddenly in (3), by potassium permanganate be added in deionized water with 0.025mol/L potassium permanganate solution, take the NH of 10mL2-
Ultrasound 30 minutes or more after rGO aqueous solutions are mixed with 40mL potassium permanganate solutions, is transferred in reaction kettle and carries out hydro-thermal reaction,
Obtained sediment is washed with deionized water and ethanol solution until supernatant is colourless respectively, by ring of the sediment at 60 DEG C
It is dried in vacuo, grinds under border, NH is made2-rGO/MnO2Powder.
5. a kind of NH according to claim 42-rGO/MnO2The preparation method of composite material, which is characterized in that the step
Suddenly in (3), the temperature of the hydro-thermal reaction is 180 DEG C, and the time is 15 hours.
6. a kind of NH made from preparation method as described in Claims 1 to 52-rGO/MnO2Composite material.
7. NH as claimed in claim 62-rGO/MnO2Application of the composite material in capacitor material is prepared.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711446382.0A CN108172408B (en) | 2017-12-27 | 2017-12-27 | NH (hydrogen sulfide)2-rGO/MnO2Composite material, preparation method and application |
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| CN201711446382.0A CN108172408B (en) | 2017-12-27 | 2017-12-27 | NH (hydrogen sulfide)2-rGO/MnO2Composite material, preparation method and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817471A (en) * | 2018-12-26 | 2019-05-28 | 中国电子科技集团公司第十八研究所 | Modification method of graphene-based lithium ion capacitor positive electrode material |
| CN110108670A (en) * | 2019-05-31 | 2019-08-09 | 重庆理工大学 | The production method of hydrogen sulfide sensor based on the thin core fibre of overlay film and its detection method of sensor and sulfureted hydrogen gas concentration |
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| CN110354282B (en) * | 2019-08-23 | 2021-11-09 | 东华大学 | Manganese dioxide and adriamycin loaded nano hydrogel and preparation and application thereof |
| CN113053676A (en) * | 2021-03-18 | 2021-06-29 | 合肥工业大学 | Composite film electrode material, electrode and preparation method thereof |
| CN113603205A (en) * | 2021-07-06 | 2021-11-05 | 山东大学 | Method for accelerating degradation of organic pollutants by potassium permanganate |
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