CN106449131A - Graphene-covered flower-like nickel hydroxide composite electrode material and preparation method thereof - Google Patents
Graphene-covered flower-like nickel hydroxide composite electrode material and preparation method thereof 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
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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 relates to a graphene-covered flower-like nickel hydroxide composite electrode material and a preparation method thereof. The preparation method comprises: adding graphene oxide into distilled water, ultrasonically dispersing and adding nickel chloride hexahydrate, adding ammonia water to adjust pH to 11, adding polystyrene sodium sulfate and cetyl trimethyl ammonium bromide to the solution, stirring well to dissolution to obtain mixed solution, mixing water and ethylene glycol to obtain a solution, mixing well the solution and pouring into a hydrothermal reactor to carry out hydrothermal reaction, suction-filtering the reaction product, washing, and drying to obtain graphene-covered flower-like Ni(OH)2 composite electrode material. Flower-like Ni(OH)2 is formed by mutually inserting two-dimensional lamellar Ni(OH)2, and the surface of Ni(OH)2 is covered with two-dimensional graphene. The graphene-covered flower-like nickel hydroxide composite electrode material has high conductivity and large specific surface area, has high specific capacity and excellent cycle performance and charge-discharge performance, and is applicable to supercapacitor electrode materials; the preparation method is simple and is easy to perform.
Description
Technical field
The invention belongs to super capacitor material synthesis technical field, it is related to a kind of Graphene and wraps up flower-shaped nickel hydroxide
(Ni(OH)2) combination electrode material and preparation method thereof.
Background technology
As a kind of new advanced energy storage device, ultracapacitor improves lacking of traditional capacitor and rechargeable battery
Point is it is provided that high power density and certain energy density.Because its charge and discharge process is rapid, have extended cycle life, maintenance cost
With low, ultracapacitor is widely applied in the field such as mobile electronic device and electric automobile.
Ultracapacitor can be divided into double layer capacitor and fake capacitance capacitor (or " farad according to energy storage mechnism difference
Capacitor ").Double layer capacitor relies primarily on ion and acts in the reversible adsorption of electrode surface, stores electricity for electrostatically
Can, based on material with carbon element；And fake capacitance capacitor relies on the redox reaction of ion thus realizing faraday's electric charge reversible
Move, electrochemically store electric energy, mainly have metal-oxide, metal hydroxidess and conducting polymer etc..
In numerous fake capacitance materials, Ni (OH)2Because its theory is higher than electric capacity, cyclic reversibility is good, cheap,
The features such as environmental friendliness, by the extensive concern of researcher.But, individually with Ni (OH)2When making electrode material, due to
Its electric conductivity and cyclical stability are poor, and in charge and discharge process, volumetric expansion is serious simultaneously, leads to its actual capacitance low.
Graphene is by the tightly packed single layer crystal with honeycomb texture being formed of monolayer carbon atom.Due to Graphene tool
There are the specific surface area of superelevation, high conductivity and good chemical stability, Graphene/Ni (OH)2Composite can effectively more
Mend Ni (OH)2Defect, improve its electric conductivity, thus increasing the capacitance of composite.However, the Graphene of current report/
Ni(OH)2How composite material and preparation method thereof is with growth Ni (OH) on graphene-based bottom2Based on, in complex, Graphene is easily sent out
Raw stacking, leads to its specific surface area to greatly reduce.If Graphene is wrapped in flower-shape Ni (OH)2Surface, not only can be effective
Solve this problem, Ni (OH) can also be effectively improved2Change in volume in charge and discharge process, thus improve electrochemistry further
Energy.The present invention adopts simply economic one step hydro thermal method, using electronegative graphene oxide and positively charged Ni (OH)2Between
Electrostatic force, prepares Graphene parcel flower-shape Ni (OH)2Combination electrode material.
Content of the invention
An object of the present invention is to provide a kind of Graphene parcel flower-shape Ni (OH)2Combination electrode material, this is combined
Material specific surface area is big, and electric conductivity is good, is applied to ultracapacitor and presents good prospect.
It is a further object to provide above-mentioned Graphene parcel flower-shape Ni (OH)2The preparation side of combination electrode material
Method.This preparation method can be effectively improved Graphene stacking and nano material piles up problem, and method is simple, low cost, suitable material
Material prepare with scale.
Technical scheme is as follows：
A kind of Graphene parcel flower-shape Ni (OH)2Combination electrode material, by Graphene and Ni (OH)2Composition；Flower-shape Ni
(OH)2By two-dimensional sheet Ni (OH)2Mutually interspersed composition, two-dimensional graphene is wrapped in Ni (OH)2Surface.
A kind of Graphene parcel flower-shape Ni (OH) of the present invention2The preparation method of combination electrode material, step is as follows：
1) graphite oxide is added in distilled water, after ultrasonic disperse, add Nickel dichloride hexahydrate, ammonification water is adjusted
PH to 11, then add Sodium Polystyrene Sulfonate (PSS), ten cetyl trimethyl brominations in solution
Ammonium (CTAB) is stirred well to dissolving, obtains mixed solution；
2) water and ethylene glycol are mixed and made into solution；
3) by step 1) in solution and step 2) in solution mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction；
5) by step 4) in product carry out sucking filtration, washing, be dried, obtain Graphene parcel flower-shape Ni (OH)2Compound
Electrode material.
Preferred steps 1) graphite oxide concentration is 1g/L in mixed solution；Nickel dichloride hexahydrate concentration is 1.5～5.5g/L；
Sodium Polystyrene Sulfonate concentration is 2～5g/L；Cetyl trimethylammonium bromide concentration is 1.25～5g/L.
Preferred steps 2) in water and ethylene glycol volume ratio be 1:1～3.
Preferred steps 3) in step 1) in mixed liquor volume and step 2) in liquor capacity ratio for 1～2:1.
Preferred steps 4) in hydrothermal temperature be 120～180 DEG C, the hydro-thermal time be 8～14h.
Preferred steps 5) in baking temperature be 60～80 DEG C, drying time be 6～10h.
The present invention utilizes hydro-thermal reaction high-temperature and high-pressure conditions, using PSS as structure directing agent induced synthesis flower-like structure.Water
In thermal response, due to electrostatic attraction effect, the Ni of the electronegative sulfonic group of PSS side chain and positively charged2+Ions binding, forms no
Machine-organic hybrid structure, this structure is easily polymerized under PSS induction.PSS chain group is due to hydrophilic-hydrophobic phase interaction simultaneously
With, and Ni (OH)2The anisotropy of nanometer sheet, forms Ni (OH)2The interspersed flower-shaped spherical structure constituting.
Graphene parcel flower-shape Ni (OH) of above-mentioned gained2Combination electrode material, has very big specific surface area and excellent
Electric conductivity, there is very high capacitance and cyclical stability simultaneously, can use directly as super capacitor material.
Beneficial effects of the present invention：
(1) Graphene parcel flower-shape Ni (OH) of the present invention2Combination electrode material, Ni (OH)2Structure is flower-like structure,
Grain is uniform in size, does not have serious packing phenomenon, Graphene is wrapped in flower-shape Ni (OH) simultaneously2Surface, improves material entirety
Electric conductivity.
(2) Graphene parcel flower-shape Ni (OH) of the present invention2Combination electrode material, because Graphene is with electrostatic interaction masterpiece
Used in flower-shape Ni (OH)2Surface, weakens the interaction force of graphene film interlayer, effectively improves Graphene stacking phenomenon.
Material specific surface area is big simultaneously, is fully contacted with electrolyte, ion fast transportation and electronics can be promoted effectively to transmit, therefore originally
Graphene parcel flower-shape Ni (OH) of invention2Combination electrode material has very high specific capacity and stable charge/discharge.Can be used for
Electrode material for super capacitor.
(3) Graphene parcel flower-shape Ni (OH) of the present invention2Combination electrode material preparation method, due to adopting hydro-thermal method,
Therefore its preparation process is simple to operate, and course of reaction is easy to control, preparation process environmental protection, with low cost it is adaptable to industrialized production.
Brief description
Fig. 1 is example 1 gained Graphene parcel flower-shape Ni (OH)2Charge and discharge under different electric current densities for the combination electrode material
Electric curve chart.
Fig. 2 is example 2 gained Graphene parcel flower-shape Ni (OH)2The XRD spectra of combination electrode material.
Fig. 3 is example 2 gained Graphene parcel flower-shape Ni (OH)2The scanning electron microscope (SEM) photograph of combination electrode material.
Fig. 4 is example 2 gained Graphene parcel flower-shape Ni (OH)2Cyclic voltammetric under difference sweeps speed for the combination electrode material
Curve chart.
Specific embodiment
With accompanying drawing, the present invention is expanded on further below by specific embodiment, but is not intended to limit the present invention.
Embodiment 1
1) graphite oxide is added in distilled water, after ultrasonic disperse, adds Nickel dichloride hexahydrate, ammonification water adjusts pH to 11,
Add Sodium Polystyrene Sulfonate (PSS) again in solution, cetyl trimethylammonium bromide (CTAB) is stirred well to dissolving.Its
Middle graphite oxide concentration is 1g/L；Nickel dichloride hexahydrate concentration is 1.5g/L；PSS concentration is 2g/L；CTAB concentration is 1.25g/
L.
2) by water and ethylene glycol with volume ratio 1:1 is mixed and made into solution；
3) by step 1) in solution and step 2) in solution with volume ratio for 1:1 ratio mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction.120 DEG C of controlling reaction temperature,
Response time 8h；
5) by step 4) in product carry out sucking filtration, washing, be dried, baking temperature be 60 DEG C, after 6h is dried, obtain stone
Black alkene parcel flower-shape Ni (OH)2Combination electrode material.
By above-mentioned gained Graphene parcel flower-shape Ni (OH)2Combination electrode material and acetylene black, PTFE is with mass ratio for 8:
1:After 1 ratio mix homogeneously, active material is pressed in the nickel foam of 1cm × 1cm as work under the effect of 10MPa pressure
Electrode, platinum electrode is reference electrode, and saturated calomel electrode is reference electrode, with the electrochemistry of three-electrode system test material
Can, system medium is 6M KOH solution.
Electrochemical workstation using Shanghai occasion China CHI 660B model wraps up flower-shape Ni (OH) to above-mentioned Graphene2Compound
Electrode material carries out charge-discharge performance test when electric current density is 3,5,10,15,20,30A/g, and the charging and discharging curve obtaining is such as
Shown in Fig. 1, as seen from Figure 1, above-mentioned Graphene parcel flower-shape Ni (OH)2Combination electrode material is as electrode of super capacitor
There is during materials'use excellent charge-discharge performance.The ratio capacitance that composite can be calculated by Fig. 2 charging and discharging curve is as follows
Table.
| Electric current density (A/g) | 3 | 5 | 10 | 15 | 20 | 30 |
| Specific capacity (C/g) | 431 | 363 | 289 | 240 | 216 | 180 |
As can be seen from the above table, above-mentioned Graphene parcel flower-shape Ni (OH)2Combination electrode material is as super capacitor electrode
There is during the materials'use of pole very high specific capacity, wherein specific capacity can reach 431C/g when electric current density is for 3A/g.
Embodiment 2
1) graphite oxide is added in distilled water, after ultrasonic disperse, adds Nickel dichloride hexahydrate, ammonification water adjusts pH to 11,
Add Sodium Polystyrene Sulfonate (PSS) again in solution, cetyl trimethylammonium bromide (CTAB) is stirred well to dissolving.Its
Middle graphite oxide concentration is 1g/L；Nickel dichloride hexahydrate concentration is 2.5g/L；PSS concentration is 3g/L；CTAB concentration is 2.5g/L.
2) by water and ethylene glycol with volume ratio 1:1 is mixed and made into solution；
3) by step 1) in solution and step 2) in solution with volume ratio for 2:1 ratio mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction.180 DEG C of controlling reaction temperature,
Response time 12h.；
5) by step 4) in product carry out sucking filtration, washing, be dried, baking temperature be 60 DEG C, after 8h is dried, obtain stone
Black alkene parcel flower-shape Ni (OH)2Combination electrode material.
Using X-ray diffractometer (Bruker D-8, copper target excites,) flower-shaped to above-mentioned Graphene parcel
Ni(OH)2Combination electrode material carries out XRD sign, and result is as shown in Fig. 2 the characteristic diffraction peak of material and standard card phase one
Cause, free from admixture peak, illustrate to have synthesized well composite.
Using Hitachi S4800 field emission scanning electron microscope to above-mentioned Graphene parcel flower-shape Ni (OH)2Compound
Electrode material is characterized, and result is as shown in figure 3, Ni (OH)2The flower-like structure constituting for mutually interspersed nanometer sheet, size exists
Between 1.7～2.5 μm, single-layer graphene is closely wrapped in Ni (OH)2Surface, improves the electric conductivity of composite and compares table
Area.
By above-mentioned gained Graphene parcel flower-shape Ni (OH)2Combination electrode material and acetylene black, PTFE is with mass ratio for 8:
1:After 1 ratio mix homogeneously, active material is pressed in the nickel foam of 1cm × 1cm as work under the effect of 10MPa pressure
Electrode, platinum electrode is reference electrode, and saturated calomel electrode is reference electrode, with the electrochemistry of three-electrode system test material
Can, system medium is 6M KOH solution.
Electrochemical workstation using Shanghai occasion China CHI 660B model wraps up flower-shape Ni (OH) to above-mentioned Graphene2Compound
Electrode material is circulated performance measurement, the cyclic voltammetric of gained respectively under 5,10,20,30,40,50mV/s sweep speed
As shown in figure 4, as can be seen from Figure 4, above-mentioned Graphene wraps up flower-shape Ni (OH) to curve chart2Combination electrode material cycle performance is excellent,
Can use as electrode material for super capacitor.
Electrochemical workstation using Shanghai occasion China CHI 660B model wraps up flower-shape Ni (OH) to above-mentioned Graphene2Compound
Electrode material carries out charge-discharge performance test when electric current density is 3,5,10,15,20,30A/g, calculates the ratio of composite
Capacitance such as following table.
| Electric current density (A/g) | 3 | 5 | 10 | 15 | 20 | 30 |
| Specific capacity (C/g) | 616 | 524 | 419 | 352 | 311 | 273 |
As can be seen from the above table, above-mentioned Graphene parcel flower-shape Ni (OH)2Combination electrode material is as super capacitor electrode
There is during the materials'use of pole very high specific capacity, wherein specific capacity can reach 616C/g when electric current density is for 3A/g.
Embodiment 3
1) graphite oxide is added in distilled water, after ultrasonic disperse, adds Nickel dichloride hexahydrate, ammonification water adjusts pH to 11,
Add Sodium Polystyrene Sulfonate (PSS) again in solution, cetyl trimethylammonium bromide (CTAB) is stirred well to dissolving.Its
Middle graphite oxide concentration is 1g/L；Nickel dichloride hexahydrate concentration is 4g/L；PSS concentration is 4g/L；CTAB concentration is 3.7g/L.
2) by water and ethylene glycol with volume ratio 1:2 are mixed and made into solution；
3) by step 1) in solution and step 2) in solution with volume ratio for 2:1 ratio mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction.150 DEG C of controlling reaction temperature,
Response time 12h.；
5) by step 4) in product carry out sucking filtration, washing, be dried, baking temperature be 70 DEG C, after 8h is dried, obtain stone
Black alkene parcel flower-shape Ni (OH)2Combination electrode material.
By above-mentioned gained Graphene parcel flower-shape Ni (OH)2Combination electrode material and acetylene black, PTFE is with mass ratio for 8:
1:After 1 ratio mix homogeneously, active material is pressed in the nickel foam of 1cm × 1cm as work under the effect of 10MPa pressure
Electrode, platinum electrode is reference electrode, and saturated calomel electrode is reference electrode, with the electrochemistry of three-electrode system test material
Can, system medium is 6M KOH solution.
Electrochemical workstation using Shanghai occasion China CHI 660B model wraps up flower-shape Ni (OH) to above-mentioned Graphene2Compound
Electrode material carries out charge-discharge performance test when electric current density is 3,5,10,15,20,30A/g, calculates the ratio of composite
Capacitance such as following table.
| Electric current density (A/g) | 3 | 5 | 10 | 15 | 20 | 30 |
| Specific capacity (C/g) | 505 | 406 | 308 | 262 | 235 | 207 |
As can be seen from the above table, above-mentioned Graphene parcel flower-shape Ni (OH)2Combination electrode material is as super capacitor electrode
There is during the materials'use of pole very high specific capacity, wherein specific capacity can reach 505C/g when electric current density is for 3A/g.
Embodiment 4
1) graphite oxide is added in distilled water, after ultrasonic disperse, adds Nickel dichloride hexahydrate, ammonification water adjusts pH to 11,
Add Sodium Polystyrene Sulfonate (PSS) again in solution, cetyl trimethylammonium bromide (CTAB) is stirred well to dissolving.Its
Middle graphite oxide concentration is 1g/L；Nickel dichloride hexahydrate concentration is 5.5g/L；PSS concentration is 5g/L；CTAB concentration is 5g/L.
2) by water and ethylene glycol with volume ratio 1:3 are mixed and made into solution；
3) by step 1) in solution and step 2) in solution with volume ratio for 1:1 ratio mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction.180 DEG C of controlling reaction temperature,
Response time 14h.；
5) by step 4) in product carry out sucking filtration, washing, be dried, baking temperature be 80 DEG C, after 10h is dried, obtain
Graphene parcel flower-shape Ni (OH)2Combination electrode material.
By above-mentioned gained Graphene parcel flower-shape Ni (OH)2Combination electrode material and acetylene black, PTFE is with mass ratio for 8:
1:After 1 ratio mix homogeneously, active material is pressed in the nickel foam of 1cm × 1cm as work under the effect of 10MPa pressure
Electrode, platinum electrode is reference electrode, and saturated calomel electrode is reference electrode, with the electrochemistry of three-electrode system test material
Can, system medium is 6M KOH solution.
Electrochemical workstation using Shanghai occasion China CHI 660B model wraps up flower-shape Ni (OH) to above-mentioned Graphene2Compound
Electrode material carries out charge-discharge performance test when electric current density is 3,5,10,15,20,30A/g, calculates the ratio of composite
Capacitance such as following table.
| Electric current density (A/g) | 3 | 5 | 10 | 15 | 20 | 30 |
| Specific capacity (C/g) | 462 | 405 | 323 | 273 | 240 | 207 |
As can be seen from the above table, above-mentioned Graphene parcel flower-shape Ni (OH)2Combination electrode material is as super capacitor electrode
There is during the materials'use of pole very high specific capacity, wherein specific capacity can reach 462C/g when electric current density is for 3A/g.
In sum, a kind of Graphene parcel flower-shape Ni (OH) of the present invention2Combination electrode material has very high ratio table
Area and good electric conductivity, during as super capacitor material, have excellent cycle performance and charge-discharge performance, have simultaneously
Very high specific capacity, can use as super capacitor material.
The above is only embodiments of the present invention citing, the invention is not restricted to above-described embodiment, people in the art
, according to the announcement of the present invention, the improvement made without departing from scope of the invention and modification all should be in the protection models of the present invention for member
In enclosing.
Claims (7)
1. a kind of Graphene parcel flower-shape Ni (OH)2Combination electrode material, by Graphene and Ni (OH)2Composition；It is characterized in that flower-shaped
Ni(OH)2By two-dimensional sheet Ni (OH)2Mutually interspersed composition, two-dimensional graphene is wrapped in Ni (OH)2Surface.
2. a kind of Graphene parcel flower-shape Ni (OH)2The preparation method of combination electrode material, is characterized in that step is as follows：
1) graphite oxide is added in distilled water, after ultrasonic disperse, add Nickel dichloride hexahydrate, ammonification water adjusts pH to 11, then to
Sodium Polystyrene Sulfonate is added, cetyl trimethylammonium bromide is stirred well to dissolving, obtains mixed solution in solution；
2) water and ethylene glycol are mixed and made into solution；
3) by step 1) in solution and step 2) in solution mix homogeneously；
4) by step 3) in solution pour into and in hydrothermal reaction kettle, carry out hydro-thermal reaction；
5) by step 4) in product carry out sucking filtration, washing, be dried, obtain Graphene parcel flower-shape Ni (OH)2Combination electrode material
Material.
3. method as claimed in claim 2, is characterized in that step 1) graphite oxide concentration is 1g/L in mixed solution；Six hydrations
Chlorination nickel concentration is 1.5～5.5g/L；Sodium Polystyrene Sulfonate concentration is 2～5g/L；Cetyl trimethylammonium bromide concentration
For 1.25～5g/L.
4. method as claimed in claim 2, is characterized in that step 2) in water and ethylene glycol volume ratio be 1:1～3.
5. method as claimed in claim 2, is characterized in that step 3) in step 1) in mixed liquor volume and step 2) in
Liquor capacity is than for 1～2:1.
6. method as claimed in claim 2, is characterized in that step 4) in hydrothermal temperature be 120～180 DEG C, the hydro-thermal time
For 8～14h.
7. method as claimed in claim 2, is characterized in that step 5) in baking temperature be 60～80 DEG C, drying time be 6～
10h.
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| CN112802689A (en) * | 2021-02-22 | 2021-05-14 | 重庆大学 | Porous activated carbon and alpha-Ni (OH)2Nanocomposite and method for preparing same |
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| CN106975489A (en) * | 2017-04-26 | 2017-07-25 | 浙江大学 | A kind of preparation method of nickel oxide in-stiu coating graphene nanocomposite material |
| CN106975489B (en) * | 2017-04-26 | 2019-12-31 | 浙江大学 | Preparation method of nickel oxide in-situ coated graphene nanocomposite |
| CN108854875A (en) * | 2018-04-10 | 2018-11-23 | 中国科学院合肥物质科学研究院 | A kind of flower-shaped magnesium iron layered hydroxide microballoon-graphene composite material and its application |
| CN108854875B (en) * | 2018-04-10 | 2021-07-23 | 中国科学院合肥物质科学研究院 | Flower-like magnesium-iron layered hydroxide microsphere-graphene composite material and application thereof |
| CN112802689A (en) * | 2021-02-22 | 2021-05-14 | 重庆大学 | Porous activated carbon and alpha-Ni (OH)2Nanocomposite and method for preparing same |
| CN112802689B (en) * | 2021-02-22 | 2022-08-16 | 重庆大学 | Porous activated carbon and alpha-Ni (OH) 2 Nanocomposite and method for preparing same |
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