CN109786117A - Carbon nano tube-cobaltosic sulfide composite material and preparation method and application thereof - Google Patents
Carbon nano tube-cobaltosic sulfide composite material and preparation method and application thereof Download PDFInfo
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- CN109786117A CN109786117A CN201711123379.5A CN201711123379A CN109786117A CN 109786117 A CN109786117 A CN 109786117A CN 201711123379 A CN201711123379 A CN 201711123379A CN 109786117 A CN109786117 A CN 109786117A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a carbon nano tube-cobaltosic sulfide nickel composite material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) ultrasonically dispersing a carbon nano tube, ammonia water, ethyl orthosilicate and surfactant in a mixed solution of ethanol and water, stirring for reaction, and filtering and drying the obtained powder; (2) dispersing the powder in the last step, nickel nitrate, cobalt nitrate and an alkaline environment promoter in deionized water, carrying out hydrothermal reaction, and then carrying out suction filtration, cleaning and drying on a cooled product; (3) and dispersing the powder obtained in the last step in a sodium sulfide aqueous solution, and carrying out hydrothermal reaction to finally obtain the carbon nano tube-cobaltosic sulfide composite material. The invention has the beneficial effects that: the capacity and the cycling stability of the material are improved.
Description
Technical field
The present invention relates to material chemistry technical fields, and it is compound to vulcanize two cobalts conjunction nickel more particularly to a kind of carbon nanotube-four
Material and its preparation method and application.
Background technique
Four two cobalts of vulcanization, which close nickel, has high supercapacitor fake capacitance capacity, element abundance, electric conductivity relative to sulphur
Change nickel, the features such as cobalt sulfide is high, is a kind of very promising super capacitor material.But its electric conductivity be not able to satisfy still it is super
The requirement of capacitor high current density, capacitance loss is larger at high power, and high rate performance is not good enough.Carbon nanotube crystallinity
Well, there is excellent mechanics, electric property and high specific surface area, ideal conductive network can be provided for other materials.It is logical
It crosses active material is compound with carbon nanotube, forms carbon nano tube network to provide electron channel for active material, it can be effective
Improve the electric conductivity that four two cobalts of vulcanization close nickel, is conducive to its fast ionic adsorption desorption between electrolyte, transmission, thus significantly
Improve the performance under the high magnification current density of material.In addition, carbon nanotube has high-specific surface area, by itself and four two cobalts of vulcanization
It closes nickel and carries out that clad type is compound can significantly improve its specific surface area, more reactivity sites are provided, to improve material
Capacity.
Summary of the invention
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of carbon nanotubes-four to vulcanize
Two cobalts close nickel composite material and its preparation method and application.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of carbon nanotube-four of the invention vulcanizes the preparation method that two cobalts close nickel composite material, comprising the following steps:
Step 1, carbon nanotube-silica composite material is taken, deionized water, ultrasonic disperse, wherein the carbon nanometer is added
Pipe-silica composite material concentration is 0.5~1g L-1, alkaline environment promotor and Ni (NO is then added3)2And Co
(NO3)2, after mixing evenly, the hydro-thermal reaction 10-15h under the conditions of 90 DEG C -120 DEG C is filtered after natural cooling, cleaning gained produces
Object, dry 10-15h, obtains carbon nanotube-cobaltous silicate nickel composite material under the conditions of 40-80 DEG C；
Step 2, the carbon nanotube for taking step 1 to be prepared-cobaltous silicate nickel composite material, addition ethyl alcohol and deionized water
In the mixed solvent, wherein carbon nanotube-cobaltous silicate nickel composite material concentration is 0.1g L-1~0.4g L-1, wherein ethyl alcohol and
The volume ratio of deionized water is 1:(2-4), vulcanized sodium is then added, wherein vulcanized sodium and the carbon nanotube-cobaltous silicate nickel are multiple
The mass ratio of condensation material is (4-8): 1, after being uniformly dispersed, and the hydro-thermal reaction 10-15h under the conditions of 100-200 DEG C, finally by gained
Product centrifugation is cleaned, and freeze-drying obtains carbon nanotube-four and vulcanizes two cobalts conjunction nickel composite material.
Preferably, the matter of alkaline environment promotor described in the step 1 and the carbon nanotube-silica composite material
Amount is than being (1~2): (0.02-0.04), the Ni (NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:
(1.6-2.0), Co (NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:(0.8-1.0).
Preferably, carbon nanotube-silica composite material in the step 1 is the preparation method is as follows: by surface-active
Agent is dissolved in the mixed solution of deionized water and ethyl alcohol, and wherein the concentration of surfactant is 1~2gL-1, wherein deionized water with
The volume ratio of ethyl alcohol is 1:(3-5), ammonium hydroxide and hydroxylating carbon nanotube dust is then added, in which: the additional amount of ammonium hydroxide is institute
The 0.5%~2% of mixed liquor volume is stated, concentration of the carbon nanotube in the mixed solution is 0.5~0.8g L-1, dispersion
After uniformly, positive methyl-monosilane (TEOS) is added dropwise, wherein the additional amount of TEOS is the 0.5%~2% of the mixed liquor volume,
After being stirred to react 5~10h, product is filtered and is cleaned, dry 10-15h, it is multiple to obtain carbon nanotube-silica under the conditions of 40-80 DEG C
Condensation material.
Preferably, the surfactant is cetyl trimethylammonium bromide, Cetyltrimethylammonium bromide or ten
Eight amino trimethyl ammonium chlorides.
Preferably, the alkaline environment promotor in the step 1 is urea or ammonium hydroxide.
Another aspect of the present invention further includes that a kind of two cobalts of vulcanization of carbon nanotube-four close nickel composite material, by carbon nanotube
Vulcanize two cobalts with the cluster-shaped or Nanocrystalline four for being coated on its surface and close nickel composition, coaxial cable structure is formed, according to following
Method preparation:
Step 1, carbon nanotube-silica composite material is taken, deionized water, ultrasonic disperse, wherein the carbon nanometer is added
Pipe-silica composite material concentration is 0.5~1g L-1, alkaline environment promotor and Ni (NO is then added3)2And Co
(NO3)2, after mixing evenly, the hydro-thermal reaction 10-15h under the conditions of 90 DEG C -120 DEG C is filtered after natural cooling, cleaning gained produces
Object, dry 10-15h, obtains carbon nanotube-cobaltous silicate nickel composite material under the conditions of 40-80 DEG C；
Step 2, the carbon nanotube for taking step 1 to be prepared-cobaltous silicate nickel composite material, addition ethyl alcohol and deionized water
In the mixed solvent, wherein carbon nanotube-cobaltous silicate nickel composite material concentration is 0.1g L-1~0.4g L-1, wherein ethyl alcohol and
The volume ratio of deionized water is 1:(2-4), vulcanized sodium is then added, wherein vulcanized sodium and the carbon nanotube-cobaltous silicate nickel are multiple
The mass ratio of condensation material is (4-8): 1, after being uniformly dispersed, and the hydro-thermal reaction 10-15h under the conditions of 100-200 DEG C, finally by gained
Product centrifugation is cleaned, and freeze-drying obtains carbon nanotube-four and vulcanizes two cobalts conjunction nickel composite material.
Preferably, the matter of alkaline environment promotor described in the step 1 and the carbon nanotube-silica composite material
Amount is than being (1~2): (0.02-0.04), the Ni (NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:
(1.6-2.0), Co (NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:(0.8-1.0).
Preferably, carbon nanotube-silica composite material in the step 1 is the preparation method is as follows: by surface-active
Agent is dissolved in the mixed solution of deionized water and ethyl alcohol, and wherein the concentration of surfactant is 1~2gL-1, wherein deionized water with
The volume ratio of ethyl alcohol is 1:(3-5), ammonium hydroxide and hydroxylating carbon nanotube dust is then added, in which: the additional amount of ammonium hydroxide is institute
The 0.5%~2% of mixed liquor volume is stated, concentration of the carbon nanotube in the mixed solution is 0.5~0.8g L-1, dispersion
After uniformly, positive methyl-monosilane (TEOS) is added dropwise, wherein the additional amount of TEOS is the 0.5%~2% of the mixed liquor volume,
After being stirred to react 5~10h, product is filtered and is cleaned, dry 10-15h, it is multiple to obtain carbon nanotube-silica under the conditions of 40-80 DEG C
Condensation material.
Preferably, the surfactant is cetyl trimethylammonium bromide, Cetyltrimethylammonium bromide or ten
Eight amino trimethyl ammonium chlorides.
Preferably, the alkaline environment promotor in the step 1 is urea or ammonium hydroxide.
Preferably, the carbon nanotube-four vulcanize two cobalts close nickel composite material and have 400 under 1A/g current density~
The specific capacity of 700F/g.
Another aspect of the present invention further includes that the carbon nanotube-four vulcanizes two cobalts conjunction nickel composite material in super capacitor
Application on device electrode material.
Preferably, the carbon nanotube-four is vulcanized two cobalts conjunction nickel composite material to press with carbon black, polytetrafluoroethylene (PTFE) (PTFE)
According to (5-10): (1-2): (1-2) mass ratio mixes and rolls piece or coating is used to prepare super capacitor material.
Compared with prior art, the beneficial effects of the present invention are:
1, closing nickel by four two cobalts of vulcanization of this method preparation has good performance of the supercapacitor, and synthesis technology is simple
Feasible, product is uniform.
2, two cobalts conjunction nickel composite material is vulcanized by the carbon nanotube-four of this method preparation and by carbon nanotube and is coated on its table
The cluster-shaped or Nanocrystalline four in face vulcanize two cobalts and close nickel composition, and clad structure provides big specific surface area for material, subtracts
Weak to reunite, carbon nanotube skeleton provides structural stability, and with good cyclical stability, carbon nano tube network is mentioned
Be supplied with electric power son and ion channel, improves the electric conductivity of material, thus times when improving charge and discharge under material high current density
Rate performance is still able to maintain 84.3% capacity at 5A/g.Performance of the supercapacitor test is carried out using three electrode test systems,
Carbon nanotube-four, which vulcanizes two cobalts, which closes nickel composite material, has good cyclical stability, is recycled under speed in sweeping for 50mV/s
It tests, material remains to remain with 80% capacity after 1600 circles.
Detailed description of the invention
Fig. 1 is the SEM image that the obtained carbon nanotube-four of embodiment 1 vulcanizes that two cobalts close nickel composite material；
Fig. 2 is the TEM image that the obtained carbon nanotube-four of embodiment 1 vulcanizes that two cobalts close nickel composite material；
Fig. 3 is that the obtained carbon nanotube-four of embodiment 1 vulcanizes under the different scanning rates that two cobalts close nickel composite material
Cyclic voltammetry test curve；
Fig. 4 is that the obtained carbon nanotube-four of embodiment 1 vulcanizes under the different charge-discharge velocities that two cobalts close nickel composite material
Constant current charge-discharge curve；
Fig. 5 is the 50mV/s sweep speed that the obtained carbon nanotube-four of embodiment 1 vulcanizes that two cobalts close nickel composite material
The cyclic voltammetry of 1600 weeks circulations calculates resulting volume change curve；
Fig. 6 is that the obtained cobaltous silicate nickel carbon nano tube compound material of embodiment 1 and carbon nanotube-four vulcanize two cobalts and close nickel
The XRD spectrum of composite material.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Embodiment 1
(1) 0.16g cetyl trimethylammonium bromide is taken to be dissolved in the mixed solution of 30ml deionized water and 120ml ethyl alcohol
In, 1.5ml ammonium hydroxide and 0.1g hydroxylating carbon nanotube dust is added, is mixed in beaker, ultrasonic disperse 40min.Then it is added dropwise
The positive methyl-monosilane of 1ml (TEOS), magnetic agitation 6h, revolving speed 60r/min.Then product is filtered and is cleaned, 60 DEG C of dry 12h are obtained
To CNT@SiO2。
(2) it takes and walks powder body material obtained on 30mg, be added in blue cover glass bottle, 40ml deionized water, ultrasound point is added
Dissipate 40min.Ni (the NO of 1g urea and 1ml 0.1mol/L is then added3)2With the Co (NO of 2ml 0.1mol/L3)2Solution, magnetic
Power stirs 5min, is tamping bottleneck, 105 DEG C of hydro-thermal reaction 12h.Then natural cooling filters cleaning products therefrom, 60 DEG C of dryings
12h obtains CNT@NiCoSilicate.
(3) powder made from 10mg previous step is taken, 10ml ethyl alcohol and 30ml deionized water is added, the sulphur of certain 48mg is added
Change sodium, is transferred in 50ml water heating kettle after ultrasonic 40min, 160 DEG C of hydro-thermal reaction 12h.Then products therefrom is centrifuged and is cleaned, it is cold
Jelly is dried to obtain product carbon nanotube-four and vulcanizes two cobalts conjunction nickel composite material.
It is compound that the cobaltous silicate nickel carbon nano tube compound material and carbon nanotube-four obtain to the present embodiment vulcanizes two cobalts conjunction nickel
Material carries out X-ray diffraction analysis, obtains image shown in Fig. 6, as seen from the figure, resulting materials structure complies with standard card.
Two cobalts conjunction nickel composite material is vulcanized to the carbon nanotube-four that the present embodiment obtains and is scanned electron microscope analysis and transmission
Electron-microscopic analysis obtains image as shown in Figure 1 and Figure 2, and as seen from the figure, resulting materials have coaxial cable clad structure.
The cyclic voltammetry detection that different multiplying is carried out to sample, obtains curve as shown in Figure 3, as seen from the figure, image goes out
Existing a pair of of redox peaks meet four vulcanizations, two cobalt and close nickel material characteristic.
The chronoptentiometry detection that different charge-discharge velocities are carried out to sample, obtains curve as shown in Figure 4, as seen from the figure,
Under 1A/g charge-discharge velocity, sample discharge time is 312s, is computed, and corresponding capacitance is 688F/g, and under 5A/g
Capacitance is 580F/g, remains 84.3%.
The test of cyclic voltammetry cycle life is carried out to sample, number 1600 encloses, and obtains curve as shown in Figure 5, You Tuke
Know, material passes through the circulation of 1600 circles, and material property is continued to decline according to certain rate, finally remains with initial capacity
80%, there is good cyclical stability.
Embodiment 2
(1) 0.2g cetyl trimethylammonium bromide is taken to be dissolved in the mixed solution of 30ml deionized water and 120ml ethyl alcohol,
1.5ml ammonium hydroxide and 0.1g hydroxylating carbon nanotube dust is added, is mixed in beaker, ultrasonic disperse 40min.Then 1ml is added dropwise
Positive methyl-monosilane (TEOS), magnetic agitation 6h, revolving speed 60r/min.Then product is filtered and is cleaned, 60 DEG C of dry 12h.
(2) it takes and walks powder body material obtained on 30mg, be added in blue cover glass bottle, 40ml deionized water, ultrasound point is added
Dissipate 40min.Ni (the NO of 2g ammonium hydroxide and 1ml 0.1mol/L is then added3)2With the Co (NO of 2ml 0.1mol/L3)2Solution, magnetic
Power stirs 5min, is tamping bottleneck, 105 DEG C of hydro-thermal reaction 12h.Then natural cooling filters cleaning products therefrom, 60 DEG C of dryings
12h。
(3) powder made from 10mg previous step is taken, 10ml ethyl alcohol and 30ml deionized water is added, the sulphur of certain 80mg is added
Change sodium, is transferred in 50ml water heating kettle after ultrasonic 40min, 160 DEG C of hydro-thermal reaction 12h.Then products therefrom is centrifuged and is cleaned, it is cold
Jelly is dried to obtain product.
Embodiment 3
(1) 0.16g Cetyltrimethylammonium bromide is taken to be dissolved in the mixed solution of 30ml deionized water and 120ml ethyl alcohol
In, 1.5ml ammonium hydroxide and 0.1g hydroxylating carbon nanotube dust is added, is mixed in beaker, ultrasonic disperse 40min.Then it is added dropwise
The positive methyl-monosilane of 1ml (TEOS), magnetic agitation 6h, revolving speed 60r/min.Then product is filtered and is cleaned, 60 DEG C of dry 12h.
(2) it takes and walks powder body material obtained on 30mg, be added in blue cover glass bottle, 40ml deionized water, ultrasound point is added
Dissipate 40min.Ni (the NO of 1g urea and 1ml 0.1mol/L is then added3)2With the Co (NO of 2ml 0.1mol/L3)2Solution, magnetic
Power stirs 5min, is tamping bottleneck, 105 DEG C of hydro-thermal reaction 12h.Then natural cooling filters cleaning products therefrom, 60 DEG C of dryings
12h。
(3) powder made from 10mg previous step is taken, 10ml ethyl alcohol and 30ml deionized water is added, the sulphur of certain 60mg is added
Change sodium, is transferred in 50ml water heating kettle after ultrasonic 40min, 160 DEG C of hydro-thermal reaction 12h.Then products therefrom is centrifuged and is cleaned, it is cold
Jelly is dried to obtain product.
The adjustment that technological parameter is carried out according to the content of present invention can prepare the vulcanization of carbon nanotube-four two of the invention
Cobalt closes nickel composite material, and tests its performance, finds
The chronoptentiometry detection that different charge-discharge velocities are carried out to sample, under 1A/g charge-discharge velocity, sample electric discharge
Time is 300-350s, is computed, and corresponding capacitance is 650-700F/g, and the capacitance under 5A/g is 550-600F/g,
Remain 80%~85%.
The test of cyclic voltammetry cycle life is carried out to sample, number 1600 encloses, and material property is held according to certain rate
Continuous decline, finally remains with the 75-85% of initial capacity, has good cyclical stability.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of carbon nanotube-four vulcanizes the preparation method that two cobalts close nickel composite material, which comprises the following steps:
Step 1, carbon nanotube-silica composite material is taken, deionized water is added, ultrasonic disperse is then added alkaline environment and promotees
Into agent and Ni (NO3)2With Co (NO3)2, after mixing evenly, hydro-thermal reaction 10-15h, natural cooling under the conditions of 90 DEG C -120 DEG C
It filters afterwards, clean products therefrom, dry 10-15h, obtains carbon nanotube-cobaltous silicate nickel composite material under the conditions of 40-80 DEG C；
Step 2, the mixing of ethyl alcohol and deionized water is added in the carbon nanotube for taking step 1 to be prepared-cobaltous silicate nickel composite material
In solvent, vulcanized sodium is then added, wherein vulcanized sodium and the carbon nanotube-cobaltous silicate nickel composite material mass ratio are (4-
8): 1, after being uniformly dispersed, products therefrom is finally centrifuged and cleans by the hydro-thermal reaction 10-15h under the conditions of 100-200 DEG C, and freezing is dry
The dry carbon nanotube-four that obtains vulcanizes two cobalts conjunction nickel composite material.
2. a kind of carbon nanotube-four as described in claim 1 vulcanizes the preparation method that two cobalts close nickel composite material, feature exists
Be in the mass ratio of, alkaline environment promotor described in the step 1 and the carbon nanotube-silica composite material (1~
2): (0.02-0.04), the Ni (NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:(1.6-2.0),
Co(NO3)2Mass ratio with the carbon nanotube-silica composite material is 1:(0.8-1.0).
3. a kind of carbon nanotube-four as described in claim 1 vulcanizes the preparation method that two cobalts close nickel composite material, feature exists
In carbon nanotube-silica composite material in the step 1 is the preparation method is as follows: be dissolved in deionization for surfactant
In the mixed solution of water and ethyl alcohol, wherein the concentration of surfactant is 1~2gL-1, the wherein volume ratio of deionized water and ethyl alcohol
For 1:(3-5), ammonium hydroxide and hydroxylating carbon nanotube dust is then added, in which: the additional amount of ammonium hydroxide is the mixed solution body
Long-pending 0.5%~2%, concentration of the carbon nanotube in the mixed solution are 0.5~0.8g L-1, after being uniformly dispersed, it is added dropwise just
Methyl-monosilane (TEOS), wherein the additional amount of TEOS is the 0.5%~2% of the mixed liquor volume, it is stirred to react 5~
After 10h, product is filtered and is cleaned, dry 10-15h, obtains carbon nanotube-silica composite material under the conditions of 40-80 DEG C.
4. a kind of carbon nanotube-four as claimed in claim 3 vulcanizes the preparation method that two cobalts close nickel composite material, feature exists
In the surfactant is cetyl trimethylammonium bromide, Cetyltrimethylammonium bromide or 18 amino trimethyls
Ammonium chloride.
5. a kind of carbon nanotube-four as described in claim 1 vulcanizes the preparation method that two cobalts close nickel composite material, feature exists
In the alkaline environment promotor in the step 1 is urea or ammonium hydroxide.
6. a kind of carbon nanotube-four, which vulcanizes two cobalts, closes nickel composite material, which is characterized in that by carbon nanotube and be coated on its surface
Cluster-shaped or Nanocrystalline four vulcanize two cobalts close nickel constitute, formed coaxial cable structure, prepare in accordance with the following methods:
Step 1, carbon nanotube-silica composite material is taken, deionized water is added, ultrasonic disperse is then added alkaline environment and promotees
Into agent and Ni (NO3)2With Co (NO3)2, after mixing evenly, hydro-thermal reaction 10-15h, natural cooling under the conditions of 90 DEG C -120 DEG C
It filters afterwards, clean products therefrom, dry 10-15h, obtains carbon nanotube-cobaltous silicate nickel composite material under the conditions of 40-80 DEG C；
Step 2, the mixing of ethyl alcohol and deionized water is added in the carbon nanotube for taking step 1 to be prepared-cobaltous silicate nickel composite material
In solvent, vulcanized sodium is then added, wherein vulcanized sodium and the carbon nanotube-cobaltous silicate nickel composite material mass ratio are (4-
8): 1, after being uniformly dispersed, products therefrom is finally centrifuged and cleans by the hydro-thermal reaction 10-15h under the conditions of 100-200 DEG C, and freezing is dry
The dry carbon nanotube-four that obtains vulcanizes two cobalts conjunction nickel composite material.
7. a kind of carbon nanotube-four as claimed in claim 6 vulcanizes two cobalts and closes nickel composite material, which is characterized in that the step
Carbon nanotube-silica composite material in rapid 1 is the preparation method is as follows: be dissolved in deionized water and ethyl alcohol for surfactant
In mixed solution, wherein the concentration of surfactant is 1~2gL-1, wherein deionized water and the volume ratio of ethyl alcohol are 1:(3-5),
Then ammonium hydroxide and hydroxylating carbon nanotube dust is added, in which: the additional amount of ammonium hydroxide be the mixed liquor volume 0.5%~
2%, concentration of the carbon nanotube in the mixed solution is 0.5~0.8g L-1, after being uniformly dispersed, positive methyl-monosilane is added dropwise,
The additional amount of middle TEOS is the 0.5%~2% of the mixed liquor volume, and after being stirred to react 5~10h, product suction filtration is washed
Only, dry 10-15h under the conditions of 40-80 DEG C, obtains carbon nanotube-silica composite material.
8. a kind of carbon nanotube-four as claimed in claim 6 vulcanizes two cobalts and closes nickel composite material, which is characterized in that the carbon
Nanotube-four vulcanizes two cobalts and closes the specific capacity that nickel composite material has 400~700F/g under 1A/g current density.
9. a kind of carbon nanotube-four as claimed in claim 6, which vulcanizes two cobalts, closes nickel composite material in electrode of super capacitor material
Application on material.
10. a kind of carbon nanotube-four as claimed in claim 9, which vulcanizes two cobalts, closes nickel composite material in electrode of super capacitor material
Application on material, it is characterised in that: the carbon nanotube-four is vulcanized into two cobalts and closes nickel composite material and carbon black, polytetrafluoroethylene (PTFE)
According to (5-10): (1-2): (1-2) mass ratio mixes and rolls piece or coating is used to prepare super capacitor material.
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