CN102637531A - Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode - Google Patents
Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode Download PDFInfo
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- CN102637531A CN102637531A CN2012100746357A CN201210074635A CN102637531A CN 102637531 A CN102637531 A CN 102637531A CN 2012100746357 A CN2012100746357 A CN 2012100746357A CN 201210074635 A CN201210074635 A CN 201210074635A CN 102637531 A CN102637531 A CN 102637531A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
- H01G11/16—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors against electric overloads, e.g. including fuses
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention provides a preparation method of slurry for an electrode of a supercapacitor, the electrode of the supercapacitor and a preparation method of the electrode of the supercapacitor. A eight-stage slurry preparation process is adopted in the preparation method of the slurry, and the preparation method of the slurry comprises the following steps of: I, dry mixing; II, wet mixing; III, lumping; IV, rubber mixing; V, roasting; VI, pelleting; VII, smashing; and VIII, slurry forming. The preparation method of the slurry can be used for increasing the solid content of the slurry, reducing the using amount of an adhesive, improving the dispersing effect of the slurry, realizing the quantitative control for the slurry preparation process and achieving better process stability and consistency. The electrode prepared by using the slurry has the advantages that the strength of the electrode is enhanced, the internal resistance of the electrode is reduced, the electrochemical stability and the structural stability of the electrode are improved, the reliability of the supercapacitor with the electrode is improved, and the service life of the supercapacitor is prolonged.
Description
Technical field
The present invention relates to ultracapacitor, relate in particular to a kind of electrode for super capacitor and preparation method thereof and a kind of electrode of super capacitor preparation method with slurry.
Background technology
Ultracapacitor is a kind of novel energy-storing device; Integrate high-energy-density, high power density, long-life characteristics such as (more than hundreds thousand of times); It has also that capacity is big, internal resistance is little, the speed that discharges and recharges is fast, operating temperature range is wide (40 ℃～65 ℃), non-maintaining, reliability advantages of higher in addition, all has in fields such as new forms of energy (wind energy and solar energy), communication, digital electric, electric power, automobile, engineering machinery, military affairs and Aero-Space very to use widely.
Electrode is the core part of ultracapacitor, is made up of active material layer and collector, and its performance quality has critical influence to the capacity of ultracapacitor, internal resistance etc.Usually, the electrode manufacture craft of ultracapacitor adopts the slurry coating process, promptly on collector, applies the mixed slurry of active material, conductive agent and binding agent, obtains activated carbon electrodes through dry, roll-in again.Wherein, pulp preparation is a most key step in this kind cloth of coating-type technology for preparing electrode.But; Traditional electrode pulping process is and adopts single step slurrying, and pulping process is that dependence experience or qualitative observation analysis carry out to a great extent, so made slurry exists solid content low; Dispersion effect is relatively poor and unstable; Defectives such as the big and instability of viscosity, thus make that the electrode that is coated with exists that bonding is not firm, dry linting, pliability reach binding agent inadequately and stop up problems such as active carbon duct, further influences chemical properties such as its capacity, internal resistance.
Summary of the invention
The present invention provides a kind of electrode of super capacitor with slurry and preparation method thereof for solving the defective of above prior art.
This electrode of super capacitor adopts the preparation of eight segmentation pulping process with the preparation method of slurry, and said eight segmentation pulping process comprise the steps:
I, do to mix, be about to active material and electric conducting material and place the mixer of sealing to carry out high speed dispersion to mix and obtain dry mash;
II, wet mixing promptly add the solvent and the dispersant of certain proportioning in the step I gained dry mash, stir into the wet-milling powder;
III, agglomerating promptly toward a certain amount of dispersant of the continuous interpolation of Step II gained material relaying, suitably reduces mixing speed, makes it to form to have certain flexible bulk elastic material;
IV, glue refining, the bulk elastic material glue that is about to Step II I gained is smelt the sheet elastic material;
The moisture in the sheet elastic material of step IV gained is promptly removed in V, baking, obtains dry sheet elastic material;
VI, granulation, the dry sheet elastic material that is about to step V gained is ground into the fine particle of certain grain size;
VII, pulverizing, the fine particle that is about to step VI gained is ground into powder;
VIII, pulping promptly add certain amount of dispersant, solvent and binding agent, and stir into slurry in step VII gained material.
Also can adopt following optimized technical scheme according to this electrode of super capacitor of embodiment with the preparation method of slurry:
Among said Step II, III, IV, VI, VII, the VIII, the control temperature is at 20 ℃～55 ℃, and the solid content of said step VIII is controlled at 25%～35%.
Said active material is at least a in active carbon, CNT, carbon black, nano carbon fiber, charcoal-aero gel, Graphene, metal oxide, conducting polymer and the organic carbonizing production, and said active material is the form of powder or fiber.
Said conductive agent is selected from least a in electrically conductive graphite, conductive black and the acetylene black.
Said dispersant is selected from one or several in sodium carboxymethylcellulose, water-base cement, polytetrafluoroethylene and the Kynoar.
Said solvent is selected from one or more in water, N-methyl pyrrolidone, ethanol, propyl alcohol and the isopropyl alcohol.
Said first binding agent is selected from one or several in sodium carboxymethylcellulose, water-base cement, polytetrafluoroethylene, Kynoar, the butadiene-styrene rubber, and said second binding agent is selected from one or several in Kynoar, polytetrafluoroethylene, polyphenylene sulfide, polyethylene and the polypropylene.
The present invention also provides a kind of preparation method of electrode for super capacitor, and it comprises the steps:
A. slurrying is about to active material, conductive agent, dispersant, binding agent and solvent and prepares slurry;
B. slurry coating is about to steps A gained slurry and is coated on the collector, becomes the preliminary treatment electrode;
C. dry, be about to said preliminary treatment electrode and toast to remove volatile ingredient wherein;
D. roll-in is about to step C gained preliminary treatment pole piece roll-in compacting, becomes electrode;
It is characterized in that said steps A adopts aforementioned arbitrary described preparation method's preparation.
According to embodiment, the preparation method of electrode for super capacitor of the present invention also can adopt following optimized technical scheme:
Extruding, transfer or blade coating mode are adopted in said slurry coating.
Each solid matter comprises in the said slurry: the said active material of 60～100 mass parts; The said conductive agent of 0～15 mass parts; The said dispersant of 0～5 mass parts, said binding agent comprise first binding agent of 0～10 mass parts and second binding agent of 0～10 mass parts.
Adopt hot air drier that said preliminary treatment electrode is toasted among the said step C, the hot air temperature of said hot air drier is set near the boiling point of solvent.
Said collector is aluminium foil or corrosive aluminum foil, and aluminum foil thickness is preferably 10 μ m～50 μ m.
The present invention also provides a kind of electrode for super capacitor; Comprise slurry and collector, said slurry is coated on the said collector, wherein; Said slurry adopts aforementioned arbitrary described ultracapacitor to use slurry, adopts preparation method's preparation of aforementioned arbitrary described electrode for super capacitor.
Preferably, said collector is aluminium foil or corrosive aluminum foil.
Further preferred, the thickness of said aluminium foil or corrosive aluminum foil is 10 μ m～50 μ m.
Preferred again, the thickness that is coated on the slurry on the said collector is 40 μ m～400 μ m.
Pass through lot of test; The applicant finds according to aforesaid I～VIII procedure; Then this slurry preparation method can improve the slurry solid content, reduces the use amount of bonding agent, improves the dispersion effect of slurry; Reduce the viscosity of slurry, realize preparation dispersiveness and the good pulp preparation controllable process of caking property.Use the electrode of this pulp preparation to improve pole strength; Reduced the internal resistance of electrode; Improved the electrical conductance of electrode, improved the electrochemical stability and the structural stability of electrode, the reliability of the ultracapacitor that this electrode of enhancing usefulness is made also increases the service life.
Description of drawings
Fig. 1 is eight segmentation pulping process flow figure of the present invention;
Fig. 2 is the preparation flow sketch map of electrode of super capacitor of the present invention;
Fig. 3 is the sem photograph of 2000 times of the embodiment of the invention 1 prepared super capacitor electrode slices;
Fig. 4 is the sem photograph of 5000 times of the embodiment of the invention 1 prepared super capacitor electrode slices;
Fig. 5 is the sem photograph of 10000 times of the embodiment of the invention 1 prepared super capacitor electrode slices.
Embodiment
Eight segmentation pulping process flows of the present invention are as shown in Figure 1, mainly may further comprise the steps:
I, do to mix, be about to active material and conductive agent and place the mixer of sealing to carry out high speed dispersion to mix and obtain dry mash;
II, wet mixing promptly add the solvent and the dispersant of certain proportioning in the step I gained dry mash, stir into the wet-milling powder; In this step, the control temperature is at 20 ℃～55 ℃, and the control solid content is 70%～80%.
III, agglomerating promptly toward a certain amount of dispersant of the continuous interpolation of Step II gained material relaying, increases mixing speed, makes it to form to have flexible bulk elastic material; The control solid content is 50～60%, and the maintenance temperature of charge is at 20 ℃～55 ℃.
IV, glue refining, the bulk elastic material that is about to Step II I gained is smelt the sheet elastic material with flour stranding machine glue; And keep temperature of charge at 20 ℃～55 ℃.
V, baking are promptly removed the moisture in the sheet elastic material of step IV gained with convection oven, obtain dry sheet elastic material.
VI, granulation, the dry sheet elastic material that is about to step V gained is ground into the fine particle of 2～10mm; And keep temperature of charge at 20 ℃～55 ℃.
VII, pulverizing, the fine particle that is about to step VI gained is ground into the powder of 0.01～0.1mm; And keep temperature of charge at 20 ℃～55 ℃.
VIII, pulping promptly add certain amount of dispersant, solvent and binding agent, and stir into slurry in step VII gained material.Specifically comprise the steps: 1) in step VII gained mixed material, add certain amount of dispersant and solvent; The control solid content is 30%～40%; The vacuum high speed dispersion stirs certain hour and obtains slurry, and the adjustment slurry viscosity is 1200mPaS～2500mPaS; 2) add first binding agent after the dilution process in the step 1) gained slurry, the vacuum stirring certain hour, the adjustment slurry viscosity is 1000mPaS～2000mPaS; 3) toward step 2) add the second binding agent emulsion in the gained slurry through sonicated, the vacuum stirring certain hour, the control solid content is 25～35%, adjustment viscosity is 1000mPaS～2000mPaS.
" solvent and the conducting resinl of certain proportioning " among the abovementioned steps II can be confirmed according to solid content, as long as promptly can satisfy the requirement of solid content.Similarly, aforementioned " a certain amount of conducting resinl ", " a small amount of conducting resinl " also are to confirm according to solid content.
Aforementioned eight steps are overall processes, and lot of test shows, through complete so whole process, can solve the problem that solid content is low, dispersion effect is poor and viscosity is bigger simultaneously.
The present invention practices in two processes at agglomerating, glue; Can solve following two problems; 1, dispersion effect problem: owing to be in solid but not under solution (liquid state) state tiny conductive particle disperseed, so do not deposit (promptly can avoid) conductive agent aggregation phenomenon after dispersion.The existence of an amount of bonding agent can guarantee that the fine particle conductive agent disperses closely bonding of back and active material.2, solid content problem: bonding agent/dispersant is act on material lip-deep; Particle is more little; The surface area of whole material is just big more, and the amount of the required use of bonding agent/dispersant is just many more, and the quantity of solvent that the use amount of bonding agent/dispersant needs at most is big; Then the ratio of solid matter in whole slurry reduces, and promptly causes solid content low.Simultaneously in granulation and pulverizing two steps; Particle agglomerating because of the front, that two steps of glue white silk are made into is the body of combining closely of active material and conductive particle; Make the granularity of whole particle increase, thereby specific area obviously diminish, like this; In follow-up pulping operation, can obtain the slurry of viscosity lower (being that binding agent is less).Simultaneously, conductive agent is dispersed preferably, can obviously reduce the use amount of the conductive agent that particle is less, specific area is big, thereby improves solid content.
Viscosity big low with solid content be two complementary factors because after slurry processes, require viscosity within the specific limits, could normally carry out next process and process, controlled solid content well, also just solved the viscosity problem.
More than eight steps, previous section mainly is the dispersion of particle and bonding, is to reduce specific surface, increases dispersed.Aft section has drying course, and the bonding agent that main cause is used before and after being is different with dicyandiamide solution, and follow-up pulping need be avoided the influence of forward part solvent.
Preparation flow sketch map such as Fig. 2 of electrode for super capacitor of the present invention, it mainly comprises the steps:
A. slurrying is about to active material, conductive agent, dispersant, binding agent and solvent and prepares slurry;
B. slurry coating is about to steps A gained slurry and is coated on the collector, becomes the preliminary treatment electrode;
C. dry, be about to said preliminary treatment electrode and toast to remove volatile ingredient wherein;
D. roll-in is about to step C gained preliminary treatment pole piece roll-in compacting, becomes electrode.
Below in conjunction with accompanying drawing the present invention is done further detailed description, so that those skilled in the art can be implemented according to this with reference to the specification literal.
Embodiment 1
At first, by proportioning first binding agent of the dispersant of the conductive black of the active carbon of 100 parts of mass parts, 9.3 parts of mass parts, 3.1 parts of mass parts, 3.5 parts of mass parts and the water of 220 parts of mass parts are mixed with slurry, the pulp preparation process is following:
Active carbon and conductive black are placed the efficient batch mixer high speed of the bipyramid batch mixing 8 hours of sealing, the dry blend that is fully mixed; Then add entry and dispersant (the dispersant temperature is controlled at 20～55 ℃), the control solid content is 70%～80%, and the working power mixer stirs 1h, and batch mixing becomes the wet-milling powder.Continue to add dispersant, the control solid content increases mixing speed 50%～60%, makes it to form to have flexible bulk material (pliability is meant object behind stress deformation, not the character of frangible); Use flour stranding machine that bulk material glue is smelt the sheet resilient materials; Place 120 ℃ convection oven to toast 8h the sheet resilient materials, obtain dry sheet resilient materials; Use comminutor the sheet resilient materials of drying to be a granulated into the fine particle of particle diameter 2mm～10mm; Use pulverizer fine particle to be ground into the powder of 0.01～0.1mm.Test shows, through two steps of granulation and pulverizing, can obtain the powder of better effect.In powder, add dispersant and water, the control solid content is 36%～38%, and the working power mixer stirs 1h.Vacuum high-speed stirred 0.5h then, adding entry is 1200mPaS～2500mPaS with the adjustment slurry viscosity, no bubble and obvious particle appear.Add first binding agent after the dilution process (the dilution process here gets final product with common methods, as dilute with water etc.), vacuum stirring 0.5h promptly gets said coating sizing-agent; Secondly, adopt coating machine to coat with the coating speed of 10m/min on the corrosive aluminum foil of 30 μ m, the thickness of coating is between 80 μ m～400 μ m; Then, with said coating pole piece through a heat drying device to remove the water in the pole piece; At last, the pole piece with said drying finally makes electrode for super capacitor of the present invention through the twin rollers roll-in.In the above step, each addition of dispersant and water need satisfy the prerequisite of control solid content.
Calculating through test, is 1800PaS through the prepared slurry viscosity of eight segmentation pulping process of the present invention, and solid content is 34.1%.This has improved solid content of slurry than the pulp-making method of prior art, has reduced the viscosity of coating sizing-agent; Further, be coated with activated carbon particles and conductive black distribution of particles excellent in uniform (seeing accompanying drawing 3-5) in the gained pole piece through adopting said slurry, and through 5 non-crackings of doubling, fall to expect phenomenon, pliability is good.This compares the rubbing method of prior art, reduces the internal resistance of electrode, improves the electrical conductance of electrode, improves the electrochemical stability and the structural stability of electrode, strengthens the reliability of the ultracapacitor made from this electrode and increases the service life.
Among this embodiment, said dispersant comprises one or several of sodium carboxymethylcellulose (CMC), water-base cement, polytetrafluoroethylene (PTFE), Kynoar (PVDF).First binding agent comprises one or several in sodium carboxymethylcellulose (CMC), water-base cement, polytetrafluoroethylene (PTFE), Kynoar (PVDF), the butadiene-styrene rubber (SBR).
Among this embodiment, said heat drying device adopts hot air drier, and hot air temperature better is to be set near the boiling point of solvent, desolvates through removing, and obtains electrode of the present invention.
Embodiment 2
At first, by proportioning first binding agent of the dispersant of the electrically conductive graphite that comprises active carbon, 9.3 parts of mass parts of 100 parts of mass parts, 3.8 parts of mass parts, 3.4 parts of mass parts, the water of 272 parts of mass parts are mixed with slurry, the pulp preparation process is following:
Active carbon and conductive black are placed the efficient batch mixer high speed of the bipyramid batch mixing 8 hours of sealing, the dry blend that is fully mixed; Then add entry and dispersant (the dispersant temperature is controlled at 20～55 ℃), the control solid content is 70%～80%, and the working power mixer stirs 1h, and batch mixing becomes the wet-milling powder.Continue to add dispersant, the control solid content increases mixing speed 50%～60%, makes it to form to have flexible bulk material; Use flour stranding machine that bulk material glue is smelt the sheet resilient materials; Place 120 ℃ convection oven to toast 8h the sheet resilient materials, obtain dry sheet resilient materials; Use comminutor the sheet resilient materials of drying to be a granulated into the fine particle of particle diameter 2mm～10mm; Use pulverizer fine particle to be ground into the powder of 0.01～0.1mm.In powder, add dispersant and water, the control solid content is 36%～38%, and the working power mixer stirs 1h.Vacuum high-speed stirred 0.5h then, the adjustment slurry viscosity is 1200mPaS～2500mPaS, no bubble and obvious particle appear.First binding agent after the adding dilution process, vacuum stirring 1h promptly gets said coating sizing-agent; Secondly, adopt coating machine to coat with the coating speed of 3m/min on the corrosive aluminum foil of 30 μ m, the thickness of coating is between 80 μ m～400 μ m; Then, with said coating pole piece through a heat drying device to remove the volatile ingredient (solvent etc.) in the electrode; At last, the pole piece with said drying finally makes electrode for super capacitor of the present invention through the twin rollers roll-in.
Calculating through test, is 1700mPaS through the prepared slurry viscosity of eight segmentation pulping process of the present invention, and solid content is 29.5%.This has improved solid content of slurry than the pulp-making method of prior art, has reduced the viscosity of coating sizing-agent; Further, be coated with activated carbon particles and electrically conductive graphite distribution of particles excellent in uniform in the gained pole piece through adopting said slurry, and through 5 non-crackings of doubling, fall to expect phenomenon, pliability is good.This compares the rubbing method of prior art, reduces the internal resistance of electrode, improves the electrical conductance of electrode, improves the electrochemical stability and the structural stability of electrode, strengthens the reliability of the ultracapacitor made from this electrode and increases useful life.
Among this embodiment, said dispersant comprises one or several of sodium carboxymethylcellulose (CMC), water-base cement, polytetrafluoroethylene (PTFE), Kynoar (PVDF).First binding agent comprises one or several in sodium carboxymethylcellulose (CMC), water-base cement, polytetrafluoroethylene (PTFE), Kynoar (PVDF), the butadiene-styrene rubber (SBR).
Among this embodiment, said heat drying device adopts hot air drier, and hot air temperature better is to be set near the boiling point of solvent, desolvates through removing, and obtains electrode of the present invention.
Embodiment 3
At first, by proportioning second binding agent of first binding agent of the dispersant of the conductive black of the active carbon of 80 parts of mass parts, 5 parts of mass parts, 2 parts of mass parts, 3 parts of mass parts, 3 parts of mass parts and the water of 296 parts of mass parts are mixed with slurry.Wherein, active carbon is YP-50, and distributors is Kuraray Chemical Co.Ltd., Shin-hankyu Bldg.9F.Blvd.C-237,1-12-39Umeda Kiataku, Osaka, 530-8611, Japan; Conductive black is SUPER S, and distributors is TIMCAL Belgium S.A., B-1050 Bruxelles, Belgium; Dispersant is WAL CRT30000P, and distributors is CM industrial chemical co., Ltd; First binding agent is LA133, and distributors is CHENGDU INDIGO POWER SOURCES CO., LTD; Second binding agent is SFN-1, the ZHONGHAO CHENGUANG RESERRCH INSTITUTE OF CHEMICAL INDUSTAY of distributors.The pulp preparation process is following:
Active carbon and conductive black are placed the efficient batch mixer high speed of the bipyramid batch mixing 8 hours of sealing, the dry blend that is fully mixed; Then add entry and dispersant (the dispersant temperature is controlled at 20～55 ℃), the control solid content is 70%～80%, and the working power mixer stirs 1h, and batch mixing becomes the wet-milling powder.Continue to add dispersant, the control solid content increases mixing speed 50%～60%, makes it to form to have flexible bulk material; Use flour stranding machine that bulk material glue is smelt the sheet resilient materials; Place 120 ℃ convection oven to toast 8h the sheet resilient materials, obtain dry sheet resilient materials; Use comminutor the sheet resilient materials of drying to be a granulated into the fine particle of particle diameter 2mm～10mm; Use pulverizer fine particle to be ground into the powder of 0.01～0.1mm.In powder, add dispersant and water, the control solid content is 36%～38%, and the working power mixer stirs 1h.Vacuum high-speed stirred 0.5h then, the adjustment slurry viscosity is 1200mPaS～2500mPaS, no bubble and obvious particle appear.First binding agent after the adding dilution process, vacuum stirring 1.5h adds second bonding agent, and vacuum stirring 0.5h regulates viscosity 1200mPaS～2500mPaS, promptly gets said coating sizing-agent; Secondly, adopt coating machine to coat with the coating speed of 10m/min on the corrosive aluminum foil of 30 μ m, the thickness of coating is between 40 μ m～400 μ m; Then, with said coating pole piece through a heat drying device to remove the volatile ingredient (solvent etc.) in the electrode; At last, the pole piece with said drying finally makes electrode for super capacitor of the present invention through the twin rollers roll-in.
Calculating through test, is 1750mPaS through the prepared slurry viscosity of eight segmentation pulping process of the present invention, and solid content is 34.5%.This has improved solid content of slurry than the pulp-making method of prior art, has reduced the viscosity of coating sizing-agent; Further, be coated with activated carbon particles and conductive black distribution of particles excellent in uniform in the gained pole piece through adopting said slurry, and through doubling 5 times and above non-cracking, fall to expect phenomenon, pliability is good.This compares the rubbing method of prior art, reduces the internal resistance of electrode, improves the electrical conductance of electrode, improves the electrochemical stability and the structural stability of electrode, strengthens the reliability of the ultracapacitor made from this electrode and increases useful life.
Although embodiment of the present invention are open as above; But it is not restricted to listed utilization in specification and the execution mode; It can be applied to various suitable the field of the invention fully, for being familiar with those skilled in the art, can easily realize other modification; Therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.
Claims (10)
1. an electrode of super capacitor is characterized in that with the preparation method of slurry said slurry adopts the preparation of eight segmentation pulping process, and said eight segmentation pulping process comprise the steps:
I, do to mix, be about to active material and electric conducting material and place the mixer of sealing to carry out high speed dispersion to mix and obtain dry mash;
II, wet mixing promptly add the solvent and the dispersant of certain proportioning in the step I gained dry mash, stir into the wet-milling powder;
III, agglomerating promptly toward a certain amount of dispersant of the continuous interpolation of Step II gained material relaying, suitably reduces mixing speed, makes it to form to have certain flexible bulk elastic material;
IV, glue refining, the bulk elastic material glue that is about to Step II I gained is smelt the sheet elastic material;
The moisture in the sheet elastic material of step IV gained is promptly removed in V, baking, obtains dry sheet elastic material;
VI, granulation, the dry sheet elastic material that is about to step V gained is ground into the fine particle of certain grain size;
VII, pulverizing, the fine particle that is about to step VI gained is ground into powder;
VIII, pulping promptly add certain amount of dispersant, solvent and binding agent, and stir into slurry in step VII gained material.
2. electrode of super capacitor as claimed in claim 1 is characterized in that with the preparation method of slurry: among said Step II, III, IV, VI, VII, the VIII, the control temperature is at 20 ℃～55 ℃, and the solid content of said step VIII is controlled at 25%～35%.
3. electrode of super capacitor as claimed in claim 1 is characterized in that with the preparation method of slurry: said binding agent comprises first binding agent and second binding agent.
4. electrode of super capacitor as claimed in claim 1 is with the preparation method of slurry; It is characterized in that: said active material is at least a in active carbon, CNT, carbon black, nano carbon fiber, charcoal-aero gel, Graphene, metal oxide, conducting polymer and the organic carbonizing production, and said active material is the form of powder or fiber.
5. electrode of super capacitor as claimed in claim 1 is characterized in that with the preparation method of slurry: said electric conducting material is selected from least a in electrically conductive graphite, conductive black and the acetylene black.
6. electrode of super capacitor as claimed in claim 1 is characterized in that with the preparation method of slurry: said dispersant is selected from one or several in sodium carboxymethylcellulose, water-base cement, polytetrafluoroethylene and the Kynoar.
7. electrode of super capacitor as claimed in claim 3 is with the preparation method of slurry; It is characterized in that: said first binding agent is selected from one or several in sodium carboxymethylcellulose, water-base cement, polytetrafluoroethylene, Kynoar, the butadiene-styrene rubber, and said second binding agent is selected from one or several in Kynoar, polytetrafluoroethylene, polyphenylene sulfide, polyethylene and the polypropylene.
8. the preparation method of an electrode for super capacitor comprises the steps:
A. slurrying is about to active material, conductive agent, dispersant, binding agent and solvent and prepares slurry;
B. slurry coating is about to steps A gained slurry and is coated on the collector, becomes the preliminary treatment electrode;
C. dry, be about to said preliminary treatment electrode and toast to remove volatile ingredient wherein;
D. roll-in is about to step C gained preliminary treatment pole piece roll-in compacting, becomes electrode;
It is characterized in that said steps A adopts like the arbitrary described preparation method of claim 1～7.
9. the manufacturing approach of electrode of super capacitor as claimed in claim 8 is characterized in that: said slurry coating employing extruding, transfer or blade coating mode.
10. the preparation method of electrode of super capacitor as claimed in claim 8; It is characterized in that: each solid matter comprises in the said slurry: the said active material of 60～100 mass parts; The said electric conducting material of 0～15 mass parts; The said dispersant of 0～5 mass parts, said binding agent comprise first binding agent of 0～10 mass parts and second binding agent of 0～10 mass parts.
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Address after: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road No. 009 China Technology Development Institute Technology Park building three, 202 building, room 306 Patentee after: TIG TECHNOLOGY CO., LTD. Address before: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road No. 009 China Technology Development Institute Technology Park building three, 202 building, room 306 Patentee before: Shenzhen City TIG New Energy Technologies Co., Ltd. |