CN105261487B - Preparation method for the nucleocapsid porous nano material with carbon element of electrode of super capacitor - Google Patents
Preparation method for the nucleocapsid porous nano material with carbon element of electrode of super capacitor Download PDFInfo
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Abstract
The preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, including preparation, the preparation of carbon nano tube dispersion liquid of carbon source solution；CNT is coated with；Carbonization；Pore-creating；Wherein CNT cladding is for by carbon source solution and carbon nano tube dispersion liquid mix homogeneously, stir 6 10 hours at 60 180 DEG C, uniformly be coated with carbon source clad in carbon nano tube surface, more scrubbed, be dried to obtain with CNT as core, carbon source is the enveloped carbon nanometer tube of external coating.The nucleocapsid porous nano material with carbon element that the inventive method prepares has good conductivity, specific surface area is big, the advantage that pore structure is abundant and ion diffusion length is short, is conducive to height ratio capacity as electrode material, the acquisition of low internal resistance, high rate capability and long circulation life.
Description
Technical field
The present invention relates to the preparation method of a kind of capacitance electrode material, especially for the nucleocapsid porous nano of electrode of super capacitor
The preparation method of material with carbon element.
Background technology
Ultracapacitor (Supercapacitors, ultracapacitor), has another name called electrochemical capacitor (Electrochemical
Capacitors), double layer capacitor (Electrical Double-Layer Capacitor), gold electric capacity, farad capacitor,
It it is a kind of electrochemical element being carried out energy storage by polarized electrolytic matter grown up from the 1970s and 1980s in last century.It is different from biography
The electrochmical power source of system, be a kind of between traditional capacitor and battery, there is the power supply of property, rely primarily on electric double layer
Electric energy is stored with Redox pseudocapacitance electric charge.But the process in its energy storage does not occur chemical reaction, this thermal energy storage process to be can
Inverse, also just because of this ultracapacitor can be hundreds thousand of secondary with repeated charge.The electric double layer electricity of its ultimate principle and other kind
Container is the same, is all the capacity utilizing the double electrical layers of activated carbon porous electrode and electrolyte composition to obtain super large.Outstanding advantages
That power density is high, the discharge and recharge time is short, have extended cycle life, operating temperature range width, be the double electricity the most having put into volume production
The one that in layer capacitor, capacity is maximum.
Ultracapacitor, owing to having high power density and long circulation life, produces at transportation, wind-power electricity generation, electronics
The various fields such as product all have wide practical use.Limiting factor of its application at present, to be mainly its energy density relatively low.Activated carbon
Being current topmost commercial electrode material, it has, and specific surface area is big, pore structure abundant, and expects the advantages such as the most inexpensive, because of
And there is in height ratio capacity electrode material obvious advantage.But, owing to activated carbon is in granular form, and carbon atom mostly is sp3
Form, therefore its electrical conductivity is low, needs in actual applications to add the conductive agent auxiliary such as white carbon black.It addition, the particle size of activated carbon
Generally at several microns to tens microns, it is long that ion diffuses into activated carbon inner distance completely, the most limited by kinetics.To sum up,
Activated carbon is when for electrode material, and internal resistance is big, and high rate performance is the best.
CNT is the cellular one-dimentional structure formed by sp2 carbon due to it, has good electric conductivity, high mechanics strong
Degree and huge draw ratio and surface area, be widely used in the composite strengthening fields such as macromolecule, be also used as catalyst carrier.
Replace the conventional conductive agent such as white carbon black with CNT, auxiliary activity charcoal is the most promising thinking in electrode material.But,
Owing to CNT caliber is thin, Van der Waals force is big, easily forms tube bank and is difficult to disperse so that when CNT mixes with activated carbon,
Being difficult to mix homogeneously, the electric conductivity of CNT cannot obtain good performance.
Summary of the invention
For solving the problems referred to above, the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention,
The nucleocapsid porous nano material with carbon element that it is prepared has good conductivity, and specific surface area is big, and pore structure is abundant and ion diffusion length is short
Advantage, beneficially height ratio capacity, low internal resistance, high rate capability and the acquisition of long circulation life.
The preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, including carbon source solution
Preparation；The preparation of carbon nano tube dispersion liquid；CNT is coated with；Carbonization；Pore-creating；
Wherein CNT cladding is for by carbon source solution and carbon nano tube dispersion liquid mix homogeneously, stirs 6-10 at 60-180 DEG C
Hour, be uniformly coated with carbon source clad in carbon nano tube surface, more scrubbed (can with ethanol diafiltration repeatedly), be dried to obtain
With CNT as core, carbon source is the enveloped carbon nanometer tube of external coating.Carbon source solution with polyvinyl alcohol, polyethylene, poly-third
In alkene, nylon arbitrary for carbon source, be dissolved in dimethylbenzene or Glycerol solvents and obtaining；In carbon source solution, carbon source concentration is 0.001-0.3
mol/L.Carbon nano tube dispersion liquid obtains for being scattered in dimethylbenzene or Glycerol solvents by CNT；Carbon in carbon nano tube dispersion liquid
The mass percent of nanotube is 0.01%-3%.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, carbonization
For by enveloped carbon nanometer tube in 0.1-1mol/L oxidizing acid, after 50-120 DEG C of oxidation processes 3-6 hour, carbon source be coated with
Layer is carbonized into agraphitic carbon shell, obtains the CNT of agraphitic carbon shell cladding, and wherein the concentration of oxidizing acid solution is with acid group
Anion concentration meter.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, pore-creating
After the CNT that agraphitic carbon shell is coated with is mixed with alkali, in 500-800 DEG C of process pore-creating in 3-6 hour more cooled,
(being neutralized with hydrochloric acid, hydrochloric acid belongs to volatile acid and is easy to remove, and is difficult to and nucleocapsid porous nano carbon material surface in acid neutralization
Formation bonding), wash, be dried.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, carbon is received
Being dried as vacuum lyophilization in mitron encapsulation steps, drying time is 24-48h.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, carbonization
In step, oxidizing acid is arbitrary in being sulphuric acid, nitric acid.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, pore-creating
In step, the CNT of agraphitic carbon shell cladding is (mass ratio) 1:(1-10 with the mixed proportion of alkali).
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, pore-creating
At least one during alkali is sodium hydroxide, potassium hydroxide or calcium hydroxide in step.
A kind of improvement of the preparation method of the nucleocapsid porous nano material with carbon element for electrode of super capacitor disclosed by the invention, pore-creating
Step is dried into being dried 12-24 hour at 20-110 DEG C.
The nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, nucleocapsid porous nano material with carbon element be with
CNT is core, and is uniformly coated with nanometer porous carbon-coating at core outer layer, and described core is single-layer carbon nano-tube or many
Layer CNT.
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, nucleocapsid porous nano
The specific surface area of material with carbon element is 300-2500m2/g。
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, the carbon nanometer of core
The number of plies of pipe is 1-20 layer.
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, the ratio of CNT
Surface area is 150-1300m2/g。
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, nanometer porous carbon
The aperture of layer is 1-50nm.
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, nanometer porous carbon
The thickness of layer is 0.05-1 μm.
A kind of improvement of the nucleocapsid porous nano material with carbon element being applied to electrode of super capacitor disclosed by the invention, nanometer porous carbon
The specific surface area of layer is 300-2500m2/g。
The ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, including positive pole, negative pole, electrolyte and every
Film, wherein negative or positive electrode surface-coated has slurry, slurry to comprise nucleocapsid porous nano material with carbon element, described nucleocapsid porous nano carbon
Material is with CNT as core, and is uniformly coated with nanometer porous carbon-coating at core outer layer, and described core is multiple-level stack
CNT.
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, nucleocapsid porous nano material with carbon element
Specific capacity in the electrolytic solution is 120-250F/g (constant current charge-discharge electric current density is 0.5A/g), or 70-180F/g is (permanent
Stream charging and discharging currents density is 5A/g).
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the equivalent series of super capacitor
Resistance is 0.1-0.5 Ω.
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, nucleocapsid porous nano material with carbon element
Specific surface area be 300-2500m2/g。
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the layer of the CNT of core
Number is 1-20 layer.
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the specific surface area of CNT
For 150-1300m2/g。
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the hole of nanometer porous carbon-coating
Footpath is 1-50nm.
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the thickness of nanometer porous carbon-coating
Degree is 0.05-1 μm.
A kind of improvement of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, the ratio of nanometer porous carbon-coating
Surface area is 300-2500m2/g。
The preparation method of the ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, comprise the steps: negative pole,
Cellulosic separator, positive pole and cellulosic separator load in shell after being assembled into battery core according to Z-type lamination process, and irrigate electrolysis
Liquid post package obtains, and wherein includes nucleocapsid porous nano material with carbon element in the coating slurry of positive pole or negative pole.
Compared with the prior art this invention, has a following usefulness:
(1) compared to the physical mixed of activated carbon Yu CNT, in this nucleocapsid porous nano material with carbon element, amorphous carbon layer is by carbon
Pipe is coated with completely, overcomes the Van der Waals force between tube and tube so that CNT dispersion is completely；Meanwhile, CNT also with work
Property charcoal completely attach to, be more conducive to electronics and be effectively transported on activated carbon.This material specific surface area is big, and pore structure is abundant and electric
Conductance is high, is conducive to, by low internal resistance, improving specific capacity, and can being effectively improved high rate performance.
(2) this nucleocapsid structure due to the thickness of shell thin, ion from electrolyte main body to completely into porous carbon structure internal layer away from
From short, the raising of the fast transport of ion, beneficially high rate performance under the biggest charging and discharging currents.
(3) ultracapacitor of application nucleocapsid porous nano material with carbon element disclosed by the invention, service life is long, at 0-2.7V electricity
Pressure, after circulating more than 5000 times, specific capacity declines 1%-5%.
Detailed description of the invention
Below in conjunction with detailed description of the invention, it is further elucidated with the present invention, it should be understood that following detailed description of the invention is merely to illustrate this
Bright rather than limit the scope of the present invention.
Nucleocapsid porous nano material with carbon element embodiment 1
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.05 μm to level porous carbon layer, and aperture is 50nm, and specific surface area is 300m2/ g), core is the CNT of 1 layer
(specific surface area is 250m2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 300m2/g。
Nucleocapsid porous nano material with carbon element embodiment 2
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.1 μm to level porous carbon layer, and aperture is 40nm, and specific surface area is 500m2/ g), core is that the carbon that 2 layer stack are folded is received
(specific surface area is 150m to mitron2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 500m2/g。
Nucleocapsid porous nano material with carbon element embodiment 3
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.3 μm to level porous carbon layer, and aperture is 35nm, and specific surface area is 700m2/ g), core is that the carbon that 3 layer stack are folded is received
(specific surface area is 400m to mitron2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 800m2/g。
Nucleocapsid porous nano material with carbon element embodiment 4
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 1 μm to level porous carbon layer, and aperture is 1nm, and specific surface area is 2500m2/ g), core is the carbon nanometer that 20 layer stack are folded
(specific surface area is 1000m to pipe2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 2500m2/g。
Nucleocapsid porous nano material with carbon element embodiment 5
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.5 μm to level porous carbon layer, and aperture is 20nm, and specific surface area is 1500m2/ g), core is the carbon that 10 layer stack are folded
(specific surface area is 800m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 1300m2/g。
Nucleocapsid porous nano material with carbon element embodiment 6
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.6 μm to level porous carbon layer, and aperture is 25nm, and specific surface area is 2000m2/ g), core is the carbon that 13 layer stack are folded
(specific surface area is 1100m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 1500m2/g。
Nucleocapsid porous nano material with carbon element embodiment 7
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.08 μm to level porous carbon layer, and aperture is 7nm, and specific surface area is 800m2/ g), core is that the carbon that 17 layer stack are folded is received
(specific surface area is 1300m to mitron2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 1800m2/g。
Nucleocapsid porous nano material with carbon element embodiment 8
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.15 μm to level porous carbon layer, and aperture is 13nm, and specific surface area is 2200m2/ g), core is the carbon that 15 layer stack are folded
(specific surface area is 800m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 1600m2/g。
Nucleocapsid porous nano material with carbon element embodiment 9
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.33 μm to level porous carbon layer, and aperture is 19nm, and specific surface area is 1600m2/ g), core is the carbon that 12 layer stack are folded
(specific surface area is 700m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 1350m2/g。
Nucleocapsid porous nano material with carbon element embodiment 10
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.68 μm to level porous carbon layer, and aperture is 25nm, and specific surface area is 1200m2/ g), core is the carbon that 16 layer stack are folded
(specific surface area is 600m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 2000m2/g。
Nucleocapsid porous nano material with carbon element embodiment 11
In the present embodiment, nucleocapsid porous nano material with carbon element is with CNT as core, and is uniformly coated with nanometer at core outer layer
(thickness is 0.84 μm to level porous carbon layer, and aperture is 36nm, and specific surface area is 1750m2/ g), core is the carbon that 19 layer stack are folded
(specific surface area is 1250m to nanotube2/ g), the specific surface area of nucleocapsid porous nano material with carbon element is 2300m2/g。
Include, without being limited to the nucleocapsid porous nano material with carbon element cited by above nucleocapsid porous nano material with carbon element embodiment all can pass through
The technical scheme cited by preparation embodiment including, without being limited to following nucleocapsid porous nano material with carbon element prepares, and without departing from
Scope of the presently claimed invention.
The preparation embodiment 1 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.3mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 0.3wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 60 DEG C, stirs 10 hours, make polyvinyl alcohol uniformly be coated with in carbon nano tube surface.
Afterwards by filter product is leached, with ethanol diafiltration repeatedly, use freeze dryer be dried under vacuum, drying time 24h,
Acquisition CNT is axle, and polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 1mol/L, processes 6 hours in 120 DEG C, complete the carbonisation of polyvinyl alcohol.
Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:1, after within 6 hours, make in 500 DEG C of process
Hole processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 12 hours at 110 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.05 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2500m2/g.This material specific capacity in organic electrolyte is 250
F/g (constant current charge-discharge electric current density is 0.5A/g), or 180F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 2 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.001mol/L.It is 1300m by specific surface area2/g
SWCN by ultrasonic disperse be scattered in dimethylbenzene formation concentration be the dispersion liquid of 0.01wt%.
Above two solution is mixed, at 80 DEG C, stirs 9.5 hours, make polyvinyl alcohol uniformly wrap in carbon nano tube surface
Cover.By filtration, product is leached afterwards, with ethanol diafiltration repeatedly, use freeze dryer to be dried under vacuum, drying time 27
H, it is thus achieved that CNT is axle, polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.1mol/L, processes 4.6 hours in 77 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:2, after within 6.8 hours, carry out in 570 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 13 hours at 100 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.05 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2500m2/g.This material specific capacity in organic electrolyte is 250
F/g (constant current charge-discharge electric current density is 0.5A/g), or 180F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 3 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.008mol/L.It is 1300m by specific surface area2/g
SWCN by ultrasonic disperse be scattered in dimethylbenzene formation concentration be the dispersion liquid of 0.08wt%.
Above two solution is mixed, at 73 DEG C, stirs 9 hours, make polyvinyl alcohol uniformly be coated with in carbon nano tube surface.
Afterwards by filter product is leached, with ethanol diafiltration repeatedly, use freeze dryer be dried under vacuum, drying time 32h,
Acquisition CNT is axle, and polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.3mol/L, processes 5.5 hours in 110 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:3, after within 5.5 hours, carry out in 520 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 14 hours at 90 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 1 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 300m2/g.This material specific capacity in organic electrolyte is 120
F/g (constant current charge-discharge electric current density is 0.5A/g), or 70F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 4 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.01mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 1.01wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 95 DEG C, stirs 8.5 hours, make polyvinyl alcohol uniformly wrap in carbon nano tube surface
Cover.By filtration, product is leached afterwards, with ethanol diafiltration repeatedly, use freeze dryer to be dried under vacuum, drying time 35
H, it is thus achieved that CNT is axle, polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.6mol/L, processes 6.2 hours in 108 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:4, after within 5 hours, make in 680 DEG C of process
Hole processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 15 hours at 80 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.1 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2000m2/g.This material specific capacity in organic electrolyte is 220
F/g (constant current charge-discharge electric current density is 0.5A/g), or 150F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 5 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.05mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 3wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 104 DEG C, stirs 8 hours, make polyvinyl alcohol uniformly be coated with in carbon nano tube surface.
Afterwards by filter product is leached, with ethanol diafiltration repeatedly, use freeze dryer be dried under vacuum, drying time 40h,
Acquisition CNT is axle, and polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.5mol/L, processes 5.5 hours in 66 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:5, after within 5.2 hours, carry out in 640 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 16 hours at 70 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.2 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 1200m2/g.This material specific capacity in organic electrolyte is 200
F/g (constant current charge-discharge electric current density is 0.5A/g), or 130F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 6 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.08mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 0.8wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 113 DEG C, stirs 7.5 hours, make polyvinyl alcohol uniformly wrap in carbon nano tube surface
Cover.By filtration, product is leached afterwards, with ethanol diafiltration repeatedly, use freeze dryer to be dried under vacuum, drying time 43
H, it is thus achieved that CNT is axle, polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.9mol/L, processes 3.6 hours in 98 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:6, after within 3.4 hours, carry out in 770 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 17 hours at 60 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.5 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2000m2/g.This material specific capacity in organic electrolyte is 220
F/g (constant current charge-discharge electric current density is 0.5A/g), or 160F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 7 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.1mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 2.1wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 125 DEG C, stirs 7 hours, make polyvinyl alcohol uniformly be coated with in carbon nano tube surface.
Afterwards by filter product is leached, with ethanol diafiltration repeatedly, use freeze dryer be dried under vacuum, drying time 45h,
Acquisition CNT is axle, and polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.78mol/L, processes 3 hours in 100 DEG C, complete the carbonization of polyvinyl alcohol
Journey.Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:7, after within 4.4 hours, carry out in 750 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 18 hours at 50 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.5 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 800m2/g.This material specific capacity in organic electrolyte is 140
F/g (constant current charge-discharge electric current density is 0.5A/g), or 110F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 8 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.17mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 1.17wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 145 DEG C, stirs 6.5 hours, make polyvinyl alcohol uniformly wrap in carbon nano tube surface
Cover.By filtration, product is leached afterwards, with ethanol diafiltration repeatedly, use freeze dryer to be dried under vacuum, drying time 48
H, it is thus achieved that CNT is axle, polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.45mol/L, processes 5 hours in 80 DEG C, complete the carbonisation of polyvinyl alcohol.
Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:8, after within 4.8 hours, carry out in 600 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 21 hours at 40 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.05 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2500m2/g.This material specific capacity in organic electrolyte is 250
F/g (constant current charge-discharge electric current density is 0.5A/g), or 180F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 9 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.2mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 2.3wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 167 DEG C, stirs 6 hours, make polyvinyl alcohol uniformly be coated with in carbon nano tube surface.
Afterwards by filter product is leached, with ethanol diafiltration repeatedly, use freeze dryer be dried under vacuum, drying time 33h,
Acquisition CNT is axle, and polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.36mol/L, processes 3 hours in 70 DEG C, complete the carbonisation of polyvinyl alcohol.
Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:9, after within 4.5 hours, carry out in 700 DEG C of process
Pore-creating processes.After cooling, it is neutralized with hydrochloric acid, and uses deionized water diafiltration, be dried 23 hours at 30 DEG C.After testing,
The layer thickness of the nanometer porous carbon-coating that this step obtains is 0.05 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 2500m2/g.This material specific capacity in organic electrolyte is 250
F/g (constant current charge-discharge electric current density is 0.5A/g), or 180F/g (constant current charge-discharge electric current density is 5A/g).
The preparation embodiment 10 of nucleocapsid porous nano material with carbon element
Polyvinyl alcohol is dissolved in dimethylbenzene, forms the solution that concentration is 0.26mol/L.It is 1300m by specific surface area2/ g's
It is the dispersion liquid of 2.72wt% that SWCN is scattered in dimethylbenzene formation concentration by ultrasonic disperse.
Above two solution is mixed, at 180 DEG C, stirs 7.3 hours, make polyvinyl alcohol uniformly wrap in carbon nano tube surface
Cover.By filtration, product is leached afterwards, with ethanol diafiltration repeatedly, use freeze dryer to be dried under vacuum, drying time 27
H, it is thus achieved that CNT is axle, polyvinyl alcohol is the nucleocapsid structure of shell.
Product is placed in the sulfuric acid solution of 0.27mol/L, processes 4 hours in 50 DEG C, complete the carbonisation of polyvinyl alcohol.
Rear diafiltration, be dried, it is thus achieved that CNT is axle, and agraphitic carbon is the pure carbon nucleocapsid structure of shell.
This pure carbon nucleocapsid structure is mixed (mass ratio) with KOH with the ratio of 1:10, after within 3 hours, make in 800 DEG C of process
Hole processes.After cooling, be neutralized with hydrochloric acid, and use deionized water diafiltration, at 20 DEG C be dried 24 hours after testing, this
The layer thickness of the nanometer porous carbon-coating that step obtains is 0.2 μm, and the diameter Distribution of porous is 1-50nm.
The specific surface area of this nucleocapsid porous nano material with carbon element is 500m2/g.This material specific capacity in organic electrolyte is 130
F/g (constant current charge-discharge electric current density is 0.5A/g), or 80F/g (constant current charge-discharge electric current density is 5A/g).
Distinguishing with above-described embodiment, in carbon nano tube dispersion liquid, solvent can also be glycerol；Carbon source solution can also be poly-second
The glycerite of enol, the xylene solution of polyethylene, the glycerite of polyethylene, polyacrylic xylene solution, polypropylene
Glycerite, the xylene solution of nylon, nylon glycerite in arbitrary；When carbonization, oxidizing acid can also be
Nitric acid；When pore-creating, alkali can also be arbitrary for include, without being limited in below scheme: sodium hydroxide, calcium hydroxide, hydrogen-oxygen
Change potassium and sodium hydroxide mixture (mass ratio 1:2,1:1,1:3,1:2.5,1:2.7,1:4,1:5,1:6,1:7 and
Other is arbitrarily than mixture), potassium hydroxide and calcium hydroxide mixture (mass ratio 1:2,1:1,1:3,1:2.5,1:2.7,
1:4,1:5,1:6,1:7 and other arbitrarily than mixture), sodium hydroxide and calcium hydroxide mixture (mass ratio 1:2,1:
1,1:3,1:2.5,1:2.7,1:4,1:5,1:6,1:7 and other arbitrarily than mixture) and sodium hydroxide, hydrogen-oxygen
Change potassium and calcium hydroxide three's mixture (mass ratio 1:1:2,0.5:1:1,1:3:1,1:1:2.5,1:2.7:1,1:1:4,
5:1:1,1:6:1,1:7:0.1 and other arbitrarily than mixture).
The embodiment 1 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 1.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.5 Ω after testing；At 0-2.7V electricity
Pressure, after circulating 5000 times, specific capacity declines 5%.
The embodiment 2 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 2.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.48 Ω after testing；At 0-2.7V
Under voltage, after circulating 8000 times, specific capacity declines 5%.
The embodiment 3 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 3.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.4 Ω after testing；At 0-2.7V electricity
Pressure, after circulating 14000 times, specific capacity declines 5%.
The embodiment 4 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 4.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.1 Ω after testing；At 0-2.7V electricity
Pressure, after circulating 22000 times, specific capacity declines 5%.
The embodiment 5 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 5.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.2 Ω after testing；At 0-2.7V electricity
Pressure, after circulating 20000 times, specific capacity declines 5%.
The embodiment 6 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 6.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.4 Ω after testing；At 0-2.7V electricity
Pressure, after circulating 12000 times, specific capacity declines 5%.
The embodiment 7 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 7.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.35 Ω after testing；At 0-2.7V
Under voltage, after circulating 15000 times, specific capacity declines 5%.
The embodiment 8 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 8.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.45 Ω after testing；At 0-2.7V
Under voltage, after circulating 10000 times, specific capacity declines 5%.
The embodiment 9 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 9.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.25 Ω after testing；At 0-2.7V
Under voltage, after circulating 5500 times, specific capacity declines 5%.
The embodiment 10 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 10.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.33 Ω after testing；At 0-2.7V
Under voltage, after circulating 8000 times, specific capacity declines 5%.
The embodiment 11 of the ultracapacitor of application nucleocapsid porous nano material with carbon element
The ultracapacitor of the present embodiment includes positive pole, negative pole, electrolyte and barrier film, and wherein negative or positive electrode surface-coated has
Slurry, slurry comprises nucleocapsid porous nano material with carbon element, and wherein nucleocapsid porous nano material with carbon element uses nucleocapsid porous nano material with carbon element real
Execute example 11.Through the capacitor assembled, encapsulation obtains, its equivalent series resistance is 0.42 Ω after testing；At 0-2.7V
Under voltage, after circulating 7000 times, specific capacity declines 5%.
In view of the present invention program embodiment is numerous, each embodiment experimental data is huge numerous, is not suitable for enumerating the most one by one explanation,
But the content of the required checking of each embodiment and the final conclusion obtained are the most close, so the most not checking to each embodiment
Content illustrates one by one, only enumerate above-mentioned part as representing explanation the present patent application excellence in place of, and not as to the present invention
The restriction of claimed range.
This place embodiment is to right in place of the claimed non-limit of technical scope midrange and in embodiment technical scheme
Single or multiple technical characteristic replace the new technical scheme formed on an equal basis, the most all in the scope of protection of present invention
In；Simultaneously in all embodiments enumerated or do not enumerate of the present invention program, parameters in the same embodiment is merely representative of
One example (i.e. a kind of feasible scheme) of its technical scheme, and between parameters, there is not strict cooperation and restriction
Relation, the most each parameter can mutually be replaced, except special declaration when stating ask without prejudice to axiom and the present invention.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also include by more than
The technical scheme that technical characteristic combination in any is formed.The above is the detailed description of the invention of the present invention, it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some improvement and profit
Decorations, these improvements and modifications are also considered as protection scope of the present invention.
Claims (6)
1. it is used for the preparation method of the nucleocapsid porous nano material with carbon element of electrode of super capacitor, it is characterised in that:
Including preparation, the preparation of carbon nano tube dispersion liquid of carbon source solution, carbon source solution with polyvinyl alcohol,
In polyethylene, polypropylene, nylon arbitrary for carbon source, be dissolved in dimethylbenzene or Glycerol solvents and obtaining；
In carbon source solution, carbon source concentration is 0.001-0.3mol/L, and carbon nano tube dispersion liquid is by carbon nanometer
Pipe is scattered in dimethylbenzene or Glycerol solvents and obtains；The quality of CNT in carbon nano tube dispersion liquid
Percent is 0.01%-3%；CNT is coated with；Carbonization；Pore-creating；
Wherein, CNT cladding for by carbon source solution and carbon nano tube dispersion liquid mix homogeneously,
Stir 6-10 hour at 60-180 DEG C, be uniformly coated with carbon source clad in carbon nano tube surface, then through washing
Washing, be dried to obtain with CNT as core, carbon source is the enveloped carbon nanometer tube of external coating；
Described carbonization is by enveloped carbon nanometer tube in 0.1-1mol/L oxidizing acid, through 50-120 DEG C of oxidation
After processing 3-6 hour, carbon source clad is carbonized into agraphitic carbon shell, obtains agraphitic carbon shell cladding
CNT, wherein the concentration of oxidizing acid solution is with acid radical anion densitometer；
Described pore-creating be by agraphitic carbon shell be coated with CNT mix with alkali after, 500-800 DEG C of process
Pore-creating in 3-6 hour, then neutralization cooled, sour, wash, be dried.
Nucleocapsid porous nano material with carbon element for electrode of super capacitor the most according to claim 1
Preparation method, it is characterised in that: described CNT encapsulation steps is dried into vacuum lyophilization,
Drying time is 24-48h.
Nucleocapsid porous nano material with carbon element for electrode of super capacitor the most according to claim 1
Preparation method, it is characterised in that: in described carburising step, oxidizing acid is arbitrary in being sulphuric acid, nitric acid.
Nucleocapsid porous nano material with carbon element for electrode of super capacitor the most according to claim 1
Preparation method, it is characterised in that: in described pore-creating step agraphitic carbon shell cladding CNT with
The mixed proportion of alkali is (mass ratio) 1:(1-10).
5. according to the nucleocapsid porous nano material with carbon element for electrode of super capacitor described in claim 1 or 4
Preparation method, it is characterised in that: in described pore-creating step alkali be sodium hydroxide, potassium hydroxide or
At least one in calcium hydroxide.
Nucleocapsid porous nano material with carbon element for electrode of super capacitor the most according to claim 1
Preparation method, it is characterised in that: described pore-creating step is dried into being dried 12-24 at 20-110 DEG C
Hour.
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