CN110491685A - A kind of graphene method for preparing super capacitor slurry and the graphene supercapacitor prepared using graphene super capacitor slurry - Google Patents
A kind of graphene method for preparing super capacitor slurry and the graphene supercapacitor prepared using graphene super capacitor slurry Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/68—Current collectors characterised by their material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The present invention relates to a kind of preparation method of graphene super capacitor slurry and its graphene supercapacitors prepared using graphene super capacitor slurry, belong to ultracapacitor energy storage device arts.The preparation method of graphene super capacitor slurry is the following steps are included: graphene powder is added in the dispersion liquid of bonding agent, agitated dispersion is prepared into the bonding agent dispersing liquid containing graphene, then graphene bonding agent dispersing liquid is subjected to kneading stirring with electrode active material in batches, it dilutes, be dispersed with stirring through solvent again, slurry is finally obtained, supercapacitor is made in the processes such as coated, roll-in, cutting, winding, fluid injection.The slurry production method is simple, fast, Yi Shixian continuous production, gained slurry graphene dispersion is preferable simultaneously, made pole piece has lower membrane resistance rate, graphene supercapacitor energy density with higher obtained, lower D.C. resistance and high power density.
Description
Technical field
The invention belongs to new energy energy storage device technical field, in particular to a kind of graphene super capacitor slurry preparation
Method and the graphene supercapacitor prepared using graphene super capacitor slurry.
Background technique
Supercapacitor is since with high power density, long cycle life, excellent low temperature and security performance etc. are excellent
Point has huge answer in electric car start and stop power supply, city common-rail traffic and its large-scale photovoltaic, wind-powered electricity generation energy storage field
Use prospect.To meet increasing need, performance of the supercapacitor is promoted from material, technique etc., it is close to prepare high-energy
The capacitor product of degree, high power density and long circulation life is always the hot spot for studying invention.
Graphene is due to having huge answer in supercapacitor field with biggish specific surface area and high conductivity
With prospect, but graphene must be dispersed well in use, and competence exertion goes out its good characteristic, however graphite
The dispersion of alkene is constantly subjected to the concern of scientific circles and industrial circle, it usually needs auxiliary material such as dispersing agent etc. is added, still
On the one hand the addition of dispersing agent can bring the increase of cost, on the other hand these materials do not have the performance boost of supercapacitor
There is any benefit, it instead can the decrease of power density and power density.Graphite alkenes carbon nanomaterial oil factor with higher, leads
It causes compared with the graphene of low-solid content viscosity with higher, therefore is directly added into graphene in active electrode and on the one hand will lead to point
It is scattered more difficult, the excellent performance of graphene can not be played, the solid content of slurry can on the other hand reduced, the face for influencing pole piece is close
Degree and compacted density, and then influence the energy density of capacitor.Active carbon is carried out sour processing by patent CN 106847534, by oxygen
Graphite alkene is dissolved in solvent, then condensation reaction occurs with polymer, obtains the positively charged graphene oxide colloid in surface, passes through
Electrostatic self-assembled technology forms graphene oxide and coats absorbent charcoal composite material slurry, so that graphene and active material reach very
It is good compound, but the process route is more complex, added graphene is graphene oxide, and the more intrinsic graphene of electric conductivity is far short of what is expected,
And the acid processing of active material may influence the performance of active material.
Summary of the invention
In order to overcome the shortcomings of the prior art, the present invention provides a kind of graphene method for preparing super capacitor slurry
And the graphene supercapacitor prepared using graphene super capacitor slurry, the especially preparation of capacitor combination electrode slurry
Method, this method do not need to add any dispersing agent or carry out oxidation processes to graphene, do not need to electrode activity material yet
Material carries out any processing, directly premixing dispersion is carried out using bonding agent as dispersing agent and graphene, then by pre-dispersed stone
Black alkene bonding agent mixed liquor and active material gradually mediate mixing, finally solubilization dilution agent and carry out high-speed stirred dispersion again, institute
Obtaining slurry has high solid content and low viscosity, and prepared supercapacitor has low DC internal resistance, high energy density
And power density.
The present invention is achieved by the following technical programs.
A kind of graphene method for preparing super capacitor slurry, comprising the following steps:
1), graphene bonding agent dispersing liquid configuration
Graphene is added in the dispersion liquid of bonding agent and is stirred dispersion, wherein the mass ratio of graphene and bonding agent is 1:
2 ~ 1:20, the solid content of graphene are 0.1% ~ 10%, and mixing speed is 10 ~ 100 r/min, and rate of dispersion is 800 ~ 3000 r/
Min, being dispersed with stirring the time is 30 ~ 600 min；
2), electrode active material and graphene bonding agent dispersing liquid substep mediate mixing
Firstly, the 20% ~ 70% of the bonding agent dispersing liquid total amount of graphene made from step 1) is taken, into bonding agent graphene mixed liquor
Active electrode material is added, carries out first step kneading and is stirred, wherein electrode active material include conductive agent and active carbon,
One of activated carbon fibre, capacitance carbon, graphite or other forms carbon material or several mixtures, wherein active raw material of wood-charcoal
Expect specific surface area > 1500m2/ g, mediating solid content is 30% ~ 90%, and mixing speed is 5 ~ 100r/min, kneading time 10
min~180 min；Then after first step kneading stirring being added in the bonding agent dispersing liquid of residue graphene made from step 1) again
It in mixture, carries out second step and mediates stirring, it is 25% ~ 85% that wherein second step, which mediates solid content, whole material proportion are as follows: activity
Material: graphene be bonded agent dispersing liquid: conductive agent=70% ~ 95%:4.5% ~ 20%:0.5% ~ 10%, mediate stirring speed be 5 ~
100r/min, kneading mixing time are 30 ~ 600 min；
3), solubilizer is diluted dispersion
Solubilizer, which is diluted, after step 2, in agitator tank is dispersed with stirring, and being entirely dispersed with stirring process is in vacuum ring
It being carried out in border, the main purpose dispersed under vacuum conditions is exactly to eliminate bubble, the dispersing uniformity for influencing material is avoided,
Wherein solid content is 20% ~ 80%, and mixing speed is 10 ~ 100r/min, and rate of dispersion is 500 ~ 3000r/min, when being dispersed with stirring
Between be 10 ~ 600min, be made graphene super capacitor slurry, wherein the range of viscosities of graphene super capacitor slurry be
3000~8000 mPa•S。
Further, graphene is that oxidation-reduction method, physics stripping method, physics intercalation or chemistry are inserted in the step 1)
Made from layer, the bonding agent is Kynoar, in polytetrafluoroethylene (PTFE), butadiene-styrene rubber, sodium carboxymethylcellulose, sodium alginate
One or more.
Further, the concentration of graphene is 0.5% ~ 5% in step 1) the graphene bonding agent dispersing liquid, and graphene is dense
It spends low, complete conductive network cannot be formed, increase super supercapacitor internal resistance, graphene excessive concentration disperses difficulty
Greatly, slurry solid content reduces, bad stability；The ratio of graphene and bonding agent is 1:5 ~ 1:15, and ratio is too low, and bonding agent contains
Measure it is lower, electrode slice be easy picking, influence device performance.Ratio is excessively high, and bonding agent ratio is excessively high, and increase internal resistance reduces device simultaneously
Part energy density.
Further, mixing speed is 20 ~ 50r/min in the step 1), and rate of dispersion is 1000 ~ 2000rpm, stirring
Jitter time is 60 ~ 300min, and it is too low to be dispersed with stirring speed, and the time is too short to be unfavorable for intergranular mixing, is dispersed with stirring speed
Too high, mixing time is too long, and stirring efficiency reduces, and the loss simultaneously for equipment is larger.
Further, the solid content that the first step mediates stirring in the step 2) is 30% ~ 90%, and the first step mediates stirring speed
Degree is 5 ~ 100r/min, and kneading time is 10min ~ 180min；It is 25% ~ 85% that second step kneading solid content, which is conjunction solid content, is pinched
Conjunction mixing time is 30 ~ 600 min.
Further, solvent described in the step 3) be one of water, ethyl alcohol, N-methyl pyrrolidones solvent or
The mixed solvent of multi-solvents.
Further, mixing speed is 20 ~ 50rpm in the step 3), and rate of dispersion is 1000 ~ 2000rpm, stirring point
Dissipating the time is 60min ~ 300min.
A kind of graphene supercapacitor prepared using graphene super capacitor slurry, graphene obtained is super
Capacitor slurry is coated, graphene supercapacitor is made in roll-in, slitting, winding and fluid injection process, wherein coating collection used
Fluid is carbon-coated aluminum foils, and the infused electrolyte solvent of capacitor includes ethylene carbonate, propene carbonate, gamma-butyrolacton, carbonic acid two
One or more of methyl esters, diethyl carbonate, butylene, methyl ethyl carbonate, acetonitrile；Solute in the electrolyte is
Sodium perchlorate, sodium hexafluoro phosphate, trifluoromethyl sulfonate, two (trimethyl fluoride sulfonyl) imines sodium, double oxalic acid Boratexes, hexafluoro arsenic
At least one of sour sodium, tetraethyleneglycol dimethylether, tetraethyl ammonium tetrafluoroborate, spiro quaternary ammonium salt.
The present invention is by graphene and adhesive solution premixing dispersion, and then active material carries out substep and mediates stirring, after
Continuous solubilizer high-speed stirred again is dispersed, and the present invention, which uses, disperses graphene and adhesive solution premixing, then active material
Carry out substep and mediate stirring, the dispersion of the subsequent high-speed stirred of solubilizer again, compared with prior art the invention has the benefit that
1, the dispersion of graphene low cost may be implemented, while not introducing dispersing agent, be conducive to promote electrode active material ratio；
2, high areal density coating may be implemented in gained slurry solid content with higher, and the traditional stirring technique solid content of solution is low,
The low problem of coated face density, and then in the energy density for promoting super capacitor；
3, technological operation is simple, easily realizes standardization, quality stability, coating apparatus can be directly accessed by stirring the slurry finished
It carries out following process and greatly promotes production efficiency without further handling.
Specific embodiment
Main idea of the present invention is further illustrated with subordinate list combined with specific embodiments below.In following embodiment, except there is special theory
Bright outer all proportions are mass ratio.
Embodiment 1
1), graphene is added in the dispersion liquid of sodium carboxymethylcellulose (CMC), graphene concentration is 0.5%, graphene and CMC
Ratio is 1:8；
2), after step 1), agitator tank is added in gained graphene adhesive solution in batches and active carbon mediate and mixed
It closes, wherein mediating mixed solid content for the first time is 50%, kneading mixing speed is 20rpm, and kneading mixing time is 20min；To
After stirring for the first time then, it then by the dispersion liquid of remaining graphene and bonding agent is added, wherein aggregate sample entirety solid content
It is 40%, stirring 120min is then mediated with 20rpm, the overall ratio of active carbon, bonding agent and graphene is 95.5:4:
0.5；
3), to step 2 after be added deionized water be stirred dispersion, wherein the whole solid content of slurry be 38%, stir
Speed is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 60min；In addition, the step is entirely dispersed with stirring
Process is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, by slitting, winding, fluid injection and envelope
The supercapacitor using the slurry is made in the processes such as mouth.Wherein by capacitor produced carry out capacity, the performances such as D.C. resistance
Test, wherein test current density is 1A/g.
Embodiment 2
1), graphene is added to the dispersion liquid of sodium carboxymethylcellulose (CMC), graphene concentration is 0.5%, graphene and CMC ratio
Example is 1:15；
2), after step 1), agitator tank is added in gained graphene adhesive solution in batches and active carbon mediate and mixed
It closes, wherein mediating mixed solid content for the first time is 60%, kneading mixing speed is 20rpm, and kneading mixing time is 20min；To
After stirring for the first time then, it then by the dispersion liquid of remaining graphene and bonding agent is added, wherein aggregate sample entirety solid content
It is 50%, stirring 120min is then mediated with 20rpm, the overall ratio of active carbon, bonding agent and graphene is 92:7.5:
0.5；
3), to step 2 after deionized water be added be stirred dispersion, slurry entirety solid content is 43%, wherein stirring is fast
Degree is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 60min, in addition, the step was entirely dispersed with stirring
Journey is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, by slitting, winding, fluid injection and envelope
The supercapacitor using the slurry is made in the processes such as mouth.Wherein by capacitor produced carry out capacity, the performances such as D.C. resistance
Test, wherein test current density is 1A/g.
Embodiment 3
1), graphene is added to the dispersion liquid of sodium carboxymethylcellulose (CMC), graphene concentration is 1%, graphene and CMC ratio
For 1:5；
2), after step 1), agitator tank is added in gained graphene adhesive solution in batches and active carbon mediate and mixed
It closes, wherein mediating mixed solid content for the first time is 48%, kneading mixing speed is 20rpm, and kneading mixing time is 20min；To
After stirring for the first time then, it then by the dispersion liquid of remaining graphene and bonding agent is added, wherein aggregate sample entirety solid content
It is 38%, stirring 120min, active carbon is then mediated with 20rpm, the overall ratio of bonding agent and graphene is 94:5:1；
3), to step 2 after be added deionized water be stirred dispersion, slurry entirety solid content is designed as 32%, wherein stirring
Mixing speed is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 60min, is divided in addition, the step entirely stirs
Scattered process is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, and gained pole piece is carried out resistivity
Test, by slitting, winding, the supercapacitor using the slurry is made in the processes such as fluid injection and sealing.Wherein by gained capacitor
Device carries out capacity, the test of the performances such as D.C. resistance, wherein test current density is 1A/g.
Embodiment 4
1), graphene is added to the dispersion liquid of SBR, graphene concentration is 1%, and graphene and SBR ratio are 1:5；
2), after step 1), agitator tank is added in gained graphene adhesive solution in batches and active carbon mediate and mixed
Closing and wherein mediating mixed solid content for the first time is 60%, and kneading mixing speed is 20rpm, and kneading mixing time is 20min；To
After stirring for the first time then, it then by the dispersion liquid of remaining graphene and bonding agent is added, wherein aggregate sample entirety solid content
For
50%, stirring 120min, active carbon are then mediated with 20rpm, the overall ratio of bonding agent and graphene is 94:5:1；
3), to step 2 after be added deionized water be stirred dispersion, slurry entirety solid content is designed as 40%, wherein stirring
Mixing speed is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 60min, in addition, the step entirely stirs
Dispersion process is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, and gained pole piece is carried out resistivity
Test, by slitting, winding, the supercapacitor using the slurry is made in the processes such as fluid injection and sealing.Wherein by gained capacitor
Device carries out capacity, the test of the performances such as D.C. resistance, wherein test current density is 1A/g.
Comparative example 1
By active carbon, graphene conductive agent, CMC bonding agent is mixed according to 94:5:1 ratio, while deionized water is added and is divided
It dissipates, wherein mixing speed is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 600min, and slurry design is solid
Content is 23%, and being entirely dispersed with stirring process is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, and gained pole piece is carried out resistivity
Test, by slitting, winding, the supercapacitor using the slurry is made in the processes such as fluid injection and sealing.Wherein by gained capacitor
Device carries out capacity, the test of the performances such as D.C. resistance, wherein test current density is 1A/g.
Comparative example 2
By active carbon, graphene conductive agent, SBR bonding agent is mixed according to 94:5:1 ratio, while deionized water is added and is divided
It dissipates, wherein mixing speed is 50r/min, rate of dispersion 2000r/min, and being dispersed with stirring the time is 600min, and material mixing design is solid
Content is 28%, and being entirely dispersed with stirring process is to carry out under vacuum, tested viscosity and solid content after the above slurry agitation.
Then coated, roll pressing must use the super-capacitor pole piece of the slurry, and gained pole piece is carried out resistivity
Test, by slitting, winding, the supercapacitor using the slurry is made in the processes such as fluid injection and sealing.Wherein by gained capacitor
Device carries out capacity, the test of the performances such as D.C. resistance, wherein test current density is 1A/g.
Active carbon used is YP-50F in the present embodiment 1- embodiment 6, and electrolyte used is PC dicyandiamide solution.
Table 1 is each embodiment slurry, pole piece and its capacitor performance data
As can be seen from the data, the Graphene electrodes slurry preparation method that the present invention uses has slurry with higher compared with common process
Expect solid content, lower viscosity, obtained supercapacitor has low D.C. resistance, high energy density and power density.
In view of the numerous embodiments of the scheme of the present invention, the performance and final conclusion of each embodiment verifying are all close, herein not
It does and illustrates one by one.It simultaneously include that cited and unlisted each experiment parameter only represents technical solution in the embodiment of the present invention
One example namely a kind of feasible scheme, and between parameters and stringent cooperation and qualified relation is not present, wherein respectively
Parameter can be replaced mutually when stating and asking without prejudice to axiom and the present invention, except special declaration.
The above description is only a preferred embodiment of the present invention and is not intended to restrict the invention, in embodiment technical solution
Same replacement is carried out to single or multiple technical parameters and forms new technical solution, equally all in claimed model
In enclosing；For those skilled in the art, the present invention can carry out various modifications and variations.It is all in spirit of the invention and
Any modification, equivalent replacement, improvement and so within principle, should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of graphene method for preparing super capacitor slurry, it is characterised in that the following steps are included:
1), graphene bonding agent dispersing liquid configuration
Graphene is added in the dispersion liquid of bonding agent and is stirred dispersion, wherein the mass ratio of graphene and bonding agent is 1:
2 ~ 1:20, the solid content of graphene are 0.1% ~ 10%, and mixing speed is 10 ~ 100 r/min, and rate of dispersion is 800 ~ 3000 r/
Min, being dispersed with stirring the time is 30 ~ 600 min；
2), electrode active material and graphene bonding agent dispersing liquid substep mediate mixing
Firstly, the 20% ~ 70% of the bonding agent dispersing liquid total amount of graphene made from step 1) is taken, into bonding agent graphene mixed liquor
Active electrode material is added, carries out first step kneading and is stirred, wherein electrode active material include conductive agent and active carbon,
One of activated carbon fibre, capacitance carbon, graphite or other forms carbon material or several mixtures, wherein active raw material of wood-charcoal
Expect specific surface area > 1500m2/ g, mediating solid content is 30% ~ 90%, and mixing speed is 5 ~ 100r/min, kneading time 10
min~180 min；Then after first step kneading stirring being added in the bonding agent dispersing liquid of residue graphene made from step 1) again
It in mixture, carries out second step and mediates stirring, it is 25% ~ 85% that wherein second step, which mediates solid content, whole material proportion are as follows: activity
Material: graphene be bonded agent dispersing liquid: conductive agent=70% ~ 95%:4.5% ~ 20%:0.5% ~ 10%, mediate stirring speed be 5 ~
100r/min, kneading mixing time are 30 ~ 600 min；
3), solubilizer is diluted dispersion
Solubilizer, which is diluted, after step 2, in agitator tank is dispersed with stirring, and being entirely dispersed with stirring process is in vacuum ring
It is carried out in border, wherein solid content is 20% ~ 80%, and mixing speed is 10 ~ 100r/min, and rate of dispersion is 500 ~ 3000r/min,
Being dispersed with stirring the time is 10 ~ 600min, and graphene super capacitor slurry is made, and wherein graphene super capacitor slurry is viscous
Degree range is 3000 ~ 8000 mPa S.
2. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 1)
Middle graphene is made from oxidation-reduction method, physics stripping method, physics intercalation or chemical graft, and the bonding agent is to gather inclined fluorine
One or more of ethylene, polytetrafluoroethylene (PTFE), butadiene-styrene rubber, sodium carboxymethylcellulose, sodium alginate.
3. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 1)
The concentration that graphene is bonded graphene in agent dispersing liquid is 0.5% ~ 5%, and the ratio of graphene and bonding agent is 1:5 ~ 1:15.
4. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 1)
Middle mixing speed is 20 ~ 50r/min, and rate of dispersion is 1000 ~ 2000rpm, and being dispersed with stirring the time is 60 ~ 300min.
5. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 2)
The solid content that the middle first step mediates stirring is 30% ~ 90%, and it is 5 ~ 100r/min that the first step, which mediates mixing speed, and kneading time is
10min~180min；It is 25% ~ 85% that second step kneading solid content, which is conjunction solid content, and kneading mixing time is 30 ~ 600 min.
6. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 3)
Described in solvent be one of water, ethyl alcohol, N-methyl pyrrolidones solvent or multi-solvents mixed solvent.
7. a kind of graphene method for preparing super capacitor slurry as described in claim 1, it is characterised in that: the step 3)
Middle mixing speed is 20 ~ 50rpm, and rate of dispersion is 1000 ~ 2000rpm, and being dispersed with stirring the time is 60min ~ 300min.
8. a kind of graphene supercapacitor using the graphene super capacitor slurry prepared such as claim 1 preparation,
Be characterized in that: by graphene super capacitor slurry obtained, graphite is made in coated, roll-in, slitting, winding and fluid injection process
Alkene supercapacitor, wherein being coated with collector used is carbon-coated aluminum foils, the infused electrolyte solvent of capacitor include ethylene carbonate,
One of propene carbonate, gamma-butyrolacton, dimethyl carbonate, diethyl carbonate, butylene, methyl ethyl carbonate, acetonitrile
Or it is several；Solute in the electrolyte is sodium perchlorate, sodium hexafluoro phosphate, trifluoromethyl sulfonate, two (trifluoromethyl sulphurs
Acyl) imines sodium, double oxalic acid Boratexes, hexafluoroarsenate sodium, tetraethyleneglycol dimethylether, tetraethyl ammonium tetrafluoroborate, spiro quaternary ammonium salt
At least one of.
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