CN102938331A - Foam nickel-base MnO2/C composite electrode material and preparation method thereof - Google Patents
Foam nickel-base MnO2/C composite electrode material and preparation method thereof Download PDFInfo
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- CN102938331A CN102938331A CN2012103849694A CN201210384969A CN102938331A CN 102938331 A CN102938331 A CN 102938331A CN 2012103849694 A CN2012103849694 A CN 2012103849694A CN 201210384969 A CN201210384969 A CN 201210384969A CN 102938331 A CN102938331 A CN 102938331A
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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 belongs to the technical field of supercapacitors, and particularly relates to an MnO2/C composite electrode material prepared on foam nickel by a hydrothermal-electrodeposition combination method, and a preparation method thereof. The electrode material can be widely used in battery electrodes and supercapacitor electrodes. The MnO2/C composite electrode material is composed of a carbon sphere material hydrothermally deposited on a foam nickel substrate, and a manganese peroxide material deposited on the carbon sphere material by an electrodeposition method. The composite electrode material provided by the invention has the advantages of simple technique and low cost, and can easily implement large-scale production. The maximum discharge specific capacity of the supercapacitor made of the foam nickel-base metal nickel oxide/carbon composite electrode material can reach 1045.5F.g<-1>, and the supercapacitor has favorable power performance and cycle performance.
Description
Technical field
The invention belongs to the ultracapacitor technical field, be specifically related to a kind of Mn0 that adopts method that hydro-thermal-electro-deposition combines to prepare on nickel foam
2/ C combination electrode material and preparation method thereof, this electrode material can be widely used in battery electrode, electrode of super capacitor.
Background technology
Energy crisis and environmental pollution more and more cause people's attention, and this impels people to start to find the various novel energy to replace traditional fossil energy.Capacitor is a kind of equipments and devices of energy storing electrical energy, because its use can be avoided electronic instrument and equipment and reduces once in a while because of power supply instantaneous trip or voltage the malfunction produced, so it is widely used in as stand-by power supply in the communication apparatus such as audio/video equipment, tuner, telephone set, facsimile machine and computer and household electrical appliance, and the application on trolley bus and electric automobile, with solar cell or the supporting application of wind energy power plant, as the pulse power of high power laser, industrial circle, military and space field etc.The capacity of existing electrochemical capacitor is the more and more difficult demand that meets various fields, so people start to develop various novel negative materials, improves the electrochemical capacitor performance.
The study hotspot of carbon electrode mainly concentrates on the electrode material that preparation has high-specific surface area, reasonably pore-size distribution and less internal resistance.The carbon electrode material that is applied at present ultracapacitor mainly contains activated carbon, activated carbon fiber, carbon aerogels, carbon nano-tube, carbon ball etc.。
Ordered porous material with carbon element is as electrode material for super capacitor, possessed that bigger serface, uniform pore size distribute, the stable advantage of physical and chemical performance, but what still can not avoid at present is that its specific capacity is lower, energy density is also less.The characteristics that metal oxide and conductive polymer electrodes material all have is larger than electric capacity, energy density is high and can fast charging and discharging; Yet the specific area of metal oxide is less, expansion and the contraction of volume can occur in conducting polymer in long-term charge and discharge process, and performance is also unstable.Metal oxide electrode material mainly contains ruthenium-oxide, nickel oxide, cobalt oxide, manganese oxide, iron oxide and aluminium oxide etc.
For overcoming the limitation of homogenous material, the performance between different kind of material compensates mutually, has produced thus the compound electrode material.Due to the advantage of ordered porous carbon and metal oxide materials, therefore, increasing researcher starts to pay close attention to the composite material of ordered porous carbon and metal oxide, to realizing the reasonable balance between material cost and performance.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide a kind of new electrode material for super capacitor---Mn0
2/ C combination electrode material and preparation method thereof.
The Ni-based Mn0 of foam of the present invention
2/ C combination electrode material, be comprised of the manganese bioxide material that is deposited on the on-chip carbon ball material of nickel foam by hydro thermal method and deposit on the carbon ball material by electro-deposition method.
The Ni-based Mn0 of foam of the present invention
2The preparation method of/C combination electrode material, its step is as follows:
1) clean the nickel foam substrate and dry;
2) preparation glucose deionized water solution;
3) nickel foam substrate step 1) obtained is put into reactor, again by step 2) glucose solution that obtains is transferred in this reactor, the nickel foam substrate is immersed in glucose solution fully, react 5～15h under 170～190 ℃, thereby prepare the carbon ball on the nickel foam substrate;
4) the nickel foam substrate is taken out to rear and cleaning, drying, then progressively be heated to 700～900 ℃ under nitrogen atmosphere, be incubated 1.5～3 hours; Finally be cooled to room temperature, thereby obtain the Ni-based carbon electrode of foam;
5) adopt the method for electrochemical deposition, the Ni-based carbon electrode of foam is immersed in and contains MnS0
4And Na
2S0
4The aqueous solution in, the voltage of setting constant potential I-t curve is 1.0～1.3V, sedimentation time 1～3h, at carbon electrodes deposition Mn0
2Thin layer, thus the Ni-based Mn0 of foam obtained
2/ C combination electrode.
Cleaning nickel foam substrate described in step 1) is also dried, and is the nickel foam substrate is used to deionized water, ethanol, acetone, ethanol, deionized water supersound washing 10～20 minutes successively, dries.
Step 2) in, the concentration of glucose deionized water solution is 0.3mol/L～1.0mol/L.
The nickel foam substrate that makes described in step 3) immerses in glucose solution fully, that the nickel foam substrate is injected to the base of being made by polytetrafluoroethylmaterial material, the nickel foam substrate is immersed in glucose solution fully together with base, thereby prevent that the nickel foam substrate from floating to above solution; Base need to carry out cleaning and the drying course identical with the nickel foam substrate equally.。
Rear and the cleaning, drying by the taking-up of nickel foam substrate described in step 4), that nickel foam substrate and base are taken out, at first repeatedly rinse nickel foam substrate and base with deionized water, then carry out ultrasonic cleaning once respectively again with deionized water and ethanolic solution, finally the nickel foam substrate is taken off from base, dried in baking oven.
MnS0 in the aqueous solution described in step 5)
4Concentration be 0.02～0.08molL
-1, Na
2S0
4Concentration be MnS0
45 times of concentration.
We are to prepared Mn0
2/ C combination electrode has carried out structure and Electrochemical Characterization, and result shows: this Mn0
2/ C combination electrode is at current density (1.5Ag
-1) under, obtained up to 1045.5Fg
-1Specific capacity.Demonstrate this electrode material and there is good chemical property and good cyclical stability.
The accompanying drawing explanation
Fig. 1: the Ni-based Mn0 of foam
2The stereoscan photograph of/C combination electrode under different amplification;
The Ni-based Mn0 of foam of Fig. 2: embodiment 2 preparations
2The XRD spectra of/C combination electrode;
The Ni-based Mn0 of foam of Fig. 3: embodiment 2 preparations
2The EDX spectrogram of/C combination electrode;
The Ni-based Mn0 of foam of Fig. 4: embodiment 2 preparations
2The cyclic voltammetry curve of/C combination electrode;
The Ni-based Mn0 of foam of Fig. 5: embodiment 2 preparations
2The constant current charge-discharge curve of/C combination electrode;
The Ni-based Mn0 of foam of Fig. 6: embodiment 2 preparations
2The cycle life curve of/C combination electrode.
Fig. 1 is the Ni-based Mn0 of foam
2The scanning electron microscope (SEM) photograph of/C combination electrode.From Fig. 1 a, b, the nickel foam surface is covered by prepared composite material, and surface is rugged, and nickel foam has still maintained the 3D network configuration.Fig. 1 c is the Ni-based Mn0 of corresponding foam
2The stereoscan photograph of the amplification of/C combination electrode, clearly shown that trickle spherical structure is below deposition layer, the stereoscan photograph that Fig. 1 d is the manganese dioxide that deposits on the Ni-based material with carbon element of foam, can observe deposited manganese dioxide is the petal-shaped structure, is similar to the accumulation from level to level of sheet.
The XRD spectra that Fig. 2 is prepared combination electrode material, through and the contrast of standard spectrogram, confirm that the material of preparing is Mn0
2/ C composite material.
Fig. 3 is the Ni-based Mn0 of foam prepared
2The EDX collection of illustrative plates of/C combination electrode material, can know the sample of preparing and contain manganese, oxygen, carbon, nickel element from picture analyzing.The sample that has proved again preparation is the composite material of manganese dioxide and carbon.
The spectrogram of the cyclic voltammetry curve that Fig. 4 is the different scanning speed lower electrode material, from figure, can see very clearly, curve does not have obvious redox peak, cathodic process and anodic process are more symmetrical, above-mentioned phenomenon shows that this material has shown electric double layer capacitance, and electrode charge and discharge process has good dynamics invertibity.
Fig. 5 is combination electrode material constant current charge-discharge curve, from figure, can find out, the constant current charge-discharge curve symmetry triangular in shape of two electrodes, show good electrochemical double-layer performance.Calculating in current density is 1.5Ag
-1The time, the high specific capacity of manganese dioxide/nickel foam is 340.22Fg
-1.And the high specific capacity of manganese dioxide/carbon/nickel foam is 1045.5Fg
-1.
The cycle life figure that Fig. 6 is combination electrode material, it is 1.5Ag that result demonstrates in current density
-1The time, cycle efficieny is up to 89.81%.
Electrode material prepared by the pressed disc method of therefore comparing, the present invention prepares the Ni-based Mn0 of foam by chemical one step hydro thermal method
2/ C material, technique is simple, the material preparation cost is low, easily realizes large-scale production, and has shown good chemical property.
Embodiment
Embodiment 1:
The cleaning of nickel foam substrate: the nickel foam substrate is cut into to the 1cm*1cm square, Yi Bian and leave therein a fillet (0.1cm*1cm), for injecting base, (base is the small cubes that a kind of polytetrafluoroethylmaterial material is made, the about 1cm of volume
3Left and right, dig out a narrow groove thereon, and its effect is to be used for fixing the nickel foam substrate, and the nickel foam substrate injects base can make the nickel foam substrate be immersed in solution, thereby prevents that the nickel foam substrate from floating to above solution; Again the nickel foam substrate is used successively to deionized water, ethanol, acetone, ethanol, each supersound washing of deionized water 10 minutes, then dried, finally the nickel foam substrate is fixed to above the base that same cleaning, drying crosses.
2.4g glucose is dissolved in the 40mL deionized water and forms settled solution, be mixed with D/W, the nickel foam substrate of this D/W, clean and the base that is used for fixing substrate are positioned in the reactor of polytetrafluoroethylene together, and the nickel foam substrate is immersed in D/W, react 10h under 180 ℃, thereby prepare the carbon ball on the nickel foam substrate, the carbon ball is of a size of 2～5 μ m.
Nickel foam substrate and base are taken out, at first with deionized water, repeatedly rinse nickel foam substrate and base, then with deionized water and ethanolic solution, carry out ultrasonic cleaning once respectively again, then the nickel foam substrate is taken off from base, dry in baking oven.Finally progressively be heated to 800 ℃ under nitrogen atmosphere, be incubated 2 hours, be cooled to room temperature, obtain the Ni-based carbon electrode of foam.
Adopt the method for electrochemical deposition, containing 0.1molL
-1Na
2S0
4And 0.02mol-L
-1MnS0
4The aqueous solution in, set the voltage 1.1V of constant potential I-t curve, sedimentation time 2h, at the Ni-based carbon electrodes deposition of foam Mn0
2Thin layer, the auxiliary electrode of employing is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the Mn0 in growth
2The quality of/C composite material, the Mn0 prepared in this example
2The quality of/C composite material is 0.0031g.By the Ni-based Mn0 of the foam prepared
2/ C combination electrode is directly as work electrode, and with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 756Fg
-1.
Embodiment 2:
In preliminary treatment, on good nickel foam, the method for hydro-thermal deposit carbon material and consumption are with embodiment 1, and only the concentration of glucose deionized water solution is 0.5mol/L.Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04molL
-1MnS0
4The aqueous solution in, set the voltage 1.1V of constant potential I-t curve, sedimentation time 2h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the Mn0 in growth
2The quality of/C composite material, the Mn0 prepared in this example
2The quality of/C composite material is 0.0126g.By the Ni-based Mn0 of the foam prepared
2/ C combination electrode is directly as work electrode, and with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 1045.5Fg
-1.
Embodiment 3:
In preliminary treatment, on good nickel foam, the method for hydro-thermal deposit carbon material and consumption are with embodiment 1, and only the concentration of glucose deionized water solution is 0.3mol/L.
Adopt the method for electrochemical deposition, containing 0.3molL
-1Na
2S0
4And 0.06molL
-1MnS0
4In solution, set the voltage 1.1V of constant potential I-t curve, sedimentation time 2h, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, at carbon electrodes deposition Mn0
2Thin layer, thus the Ni-based Mn0 of foam obtained
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the Mn0 in growth
2The quality of/C composite material, the Mn0 prepared in this example
2The quality of/C composite material is 0.0126g.Using the Ni-based and manganese oxide/carbon composite electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 862.5Fg
-1.
Embodiment 4:
In preliminary treatment, on good nickel foam, the method for hydro-thermal deposit carbon material and consumption are with embodiment 1, and only the concentration of glucose deionized water solution is 1.0mol/L.
Adopt the method for electrochemical deposition, containing 0.4molL
-1Na
2S0
4And 0.08molL
-1MnS0
4In solution, set the voltage 1.1V of constant potential I-t curve, sedimentation time 2h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the quality of the metal manganese dioxide/carbon composite material in growth.Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 902Fg
-1.
Embodiment 5:
In preliminary treatment on good nickel foam the method for hydro-thermal deposit carbon material and consumption with embodiment 1.Just make the nickel foam substrate be immersed in D/W, react 5h under 190 ℃, thereby prepare the carbon ball on the nickel foam substrate.Obtain the carbon ball and be of a size of 2～5 μ m.
Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04mol.L
-1MnS0
4In solution, set the voltage 1.0V of constant potential I-t curve, sedimentation time 2h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 756Fg
-1.
Embodiment 6:
In preliminary treatment on good nickel foam the method for hydro-thermal deposit carbon material and consumption with embodiment 1.Just make the nickel foam substrate be immersed in D/W, react 15h under 170 ℃, thereby prepare the carbon ball on the nickel foam substrate, obtain the carbon ball and be of a size of 2～5 μ m.
Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04molL
-1MnS0
4In solution, set the voltage 1.2V of constant potential I-t curve, sedimentation time 2h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 965Fg
-1.
Embodiment 7:
In preliminary treatment on good nickel foam the method for hydro-thermal deposit carbon material and consumption with embodiment 1.
Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04molL
-1MnS0
4In solution, set the voltage 1.3V of constant potential I-t curve, sedimentation time 2h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 899Fg
-1.
Embodiment 8:
In preliminary treatment on good nickel foam the method for hydro-thermal deposit carbon material and consumption with embodiment 1.Just the nickel foam substrate is taken off from base, dried in baking oven.Then progressively be heated to 700 ℃ under nitrogen atmosphere, be incubated 3 hours, be cooled to room temperature, obtain the Ni-based carbon electrode of foam, obtain the carbon ball and be of a size of 2～5 μ m.
Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04molL
-1MnS0
4In solution, set the voltage 1.1V of constant potential I-t curve, sedimentation time 1h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the quality of the metal manganese dioxide/carbon composite material in growth, and the quality of the metal manganese dioxide/carbon composite material prepared in this example is 0.00325g.Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 340Fg
-1.
Embodiment 9:
In preliminary treatment on good nickel foam the method for hydro-thermal deposit carbon material and consumption with embodiment 1.Just the nickel foam substrate is taken off from base, dried in baking oven.Then progressively be heated to 900 ℃ under nitrogen atmosphere, be incubated 1.5 hours, be cooled to room temperature, obtain the Ni-based carbon electrode of foam, obtain the carbon ball and be of a size of 2～5 μ m.
Adopt the method for electrochemical deposition, containing 0.2molL
-1Na
2S0
4And 0.04molL
-1MnS0
4In solution, set the voltage 1.1V of constant potential I-t curve, sedimentation time 3h, at carbon electrodes deposition Mn0
2Thin layer, the auxiliary electrode that this experiment adopts is the metal platinum plate electrode, thereby obtains the Ni-based Mn0 of foam
2/ C combination electrode.
The Ni-based Mn0 of weighing foam
2The quality of/C combination electrode, the quality that this quality deducts pretreated blank nickel foam is the quality of the metal manganese dioxide/carbon composite material in growth, and the quality of the metal manganese dioxide/carbon composite material prepared in this example is 0.0194g.Using the Ni-based manganese dioxide/carbon combination electrode of the foam prepared, directly as work electrode, with the metal platinized platinum, as auxiliary electrode, the Ag/AgCl electrode carries out the sign of chemical property as reference electrode.
The electrochemical property test result shows, this electrode material is 1.5Ag in current density
-1Time specific discharge capacity can reach 386Fg
-1.
Claims (7)
1. the Ni-based Mn0 of foam
2/ C combination electrode material is characterized in that: the manganese bioxide material that is deposited on the on-chip carbon ball material of nickel foam by hydro thermal method and deposit on the carbon ball material by electro-deposition method, consist of.
2. the Ni-based Mn0 of foam claimed in claim 1
2The preparation method of/C combination electrode material, its step is as follows:
1) clean the nickel foam substrate and dry;
2) preparation glucose deionized water solution;
3) nickel foam substrate step 1) obtained is put into reactor, again by step 2) glucose solution that obtains is transferred in this reactor, the nickel foam substrate is immersed in glucose solution fully, react 5～15h under 170～190 ℃, thereby prepare the carbon ball on the nickel foam substrate;
4) the nickel foam substrate is taken out to rear and cleaning, drying, then progressively be heated to 700～900 ℃ under nitrogen atmosphere, be incubated 1.5～3 hours; Finally be cooled to room temperature, thereby obtain the Ni-based carbon electrode of foam;
5) adopt the method for electrochemical deposition, the Ni-based carbon electrode of foam is immersed in and contains MnS0
4And Na
2S0
4The aqueous solution in, the voltage of setting constant potential I-t curve is 1.0～1.3V, sedimentation time 1～3h, at carbon electrodes deposition Mn0
2Thin layer, thus the Ni-based Mn0 of foam obtained
2/ C combination electrode.
3. the Ni-based Mn0 of foam as claimed in claim 2
2The preparation method of/C combination electrode material is characterized in that: the cleaning nickel foam substrate described in step 1) is also dried, and is the nickel foam substrate is used to deionized water, ethanol, acetone, ethanol, deionized water supersound washing 10～20 minutes successively, dries.
4. the Ni-based Mn0 of foam as claimed in claim 2
2The preparation method of/C combination electrode material, is characterized in that: step 2) in the concentration of glucose deionized water solution be 0.3mol/L～1.0mol/L.
5. the Ni-based Mn0 of foam as claimed in claim 2
2The preparation method of/C combination electrode material, it is characterized in that: the nickel foam substrate that makes described in step 3) immerses in glucose solution fully, that the nickel foam substrate is injected to the base of being made by polytetrafluoroethylmaterial material, the nickel foam substrate is immersed in glucose solution fully together with base, thereby prevent that the nickel foam substrate from floating to above solution; Base need to carry out cleaning and the drying course identical with the nickel foam substrate equally.
6. the Ni-based Mn0 of foam as claimed in claim 5
2The preparation method of/C combination electrode material, it is characterized in that: the rear and cleaning, drying by the taking-up of nickel foam substrate described in step 4), that nickel foam substrate and base are taken out, at first repeatedly rinse nickel foam substrate and base with deionized water, then carry out ultrasonic cleaning once respectively again with deionized water and ethanolic solution, finally the nickel foam substrate is taken off from base, dried in baking oven.
7. the Ni-based Mn0 of foam as claimed in claim 2
2The preparation method of/C combination electrode material is characterized in that: MnS0 in the aqueous solution described in step 5)
4Concentration be 0.02～0.08molL
-1, Na
2S0
4Concentration be MnS0
45 times of concentration.
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