CN102543480A - Preparation method of super capacitor - Google Patents
Preparation method of super capacitor Download PDFInfo
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- CN102543480A CN102543480A CN2011104502431A CN201110450243A CN102543480A CN 102543480 A CN102543480 A CN 102543480A CN 2011104502431 A CN2011104502431 A CN 2011104502431A CN 201110450243 A CN201110450243 A CN 201110450243A CN 102543480 A CN102543480 A CN 102543480A
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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
A preparation method of a super capacitor belongs to the technical field of new energy storage. A metal collector is conducted surface roughening, active materials, conducting materials and composite bonding agents are evenly mixed to be pressed into pole pieces with the thickness of 100-150mum, the pole pieces are bonded on the surface of the surface of the collector to form a belt-shaped electrode which is cut to be two electrodes with same size, the two electrodes are riveted with a lead, then an electrode separating film with the thickness of 10-50mum is added to form a core in a winding mode, the core is vacuumizing for 8-72 hours at 100-150 DEG C, then soaked in organic electrolyte, externally adds 2.7 V direct current voltage for electrifying 10 hours at 50 DEG C, and finally is packed in a round aluminum case to obtain a super capacitor product. The composite bonding agents are mixture of materials with the general formula of (HO-Si(CH3)2O(Si(CH3)2O)nSi(CH3)2-OH and Teflon. The electrode made by using the composite bonding agents is soft, big in mechanical strength and easy to large-scale process production, and greatly prolongs service life.
Description
Technical field
The invention belongs to new forms of energy energy storage technology field, relate to ultracapacitor, be specifically related to a kind of preparation method of ultracapacitor.
Background technology
Ultracapacitor is double electric layer capacitor again, is a kind of energy-storage travelling wave tube of novel environment friendly.The basic principle of ultracapacitor is to utilize the capacity of the double electrical layers acquisition super large of active matter porous electrode and electrolyte composition; Do not relate to chemical reaction so its energy storage mechanism is the physics energy storage, this just means that ultracapacitor has 100,000 even millions of time charge and discharge circulation lifes.The charge storage region of traditional capacitor is a simple flat surface; And ultracapacitor with active matter as both positive and negative polarity; Utilize its super large specific area to increase the memory space of electric charge, and make charged particle form electric double layer, make ultracapacitor can have other capacity of farad level at the both positive and negative polarity near surface.
In electrode of super capacitor is made in the past,, be generally dusty material with active material and electric conducting material; Mix with rubber-like binding agent and water, active material and electric conducting material are dispersed in rubber-like binding agent and the water, and wherein the dispersive electrode material is processed slurry; Form pole piece, be applied on the collector electrode, drying is processed electrode; But because a little less than the cohesive force of this method, pole piece and current collection very guarantee the adhesive strength of pole piece, bonding agent content in pole piece is higher usually more than 10%; Cause that active matter content is lower than 80% in the whole pole piece, electrode further is processed into ultracapacitor after, product capacity density is lower; Simultaneously product is in big electric current high-frequency charge and discharge process, and pole piece will separate gradually with collector electrode and peels off, and ultracapacitor properties of product deterioration is serious.
Summary of the invention
To the problem that present ultracapacitor production technology exists, the present invention provides a kind of preparation method of ultracapacitor, solves between collector electrode and pole piece problems such as the little and pole piece internal bond strength of adhesion strength is little.
Pole piece is made up of active material, electric conducting material and compound binding agent among the present invention; Pole piece and metal collector are integrally formed, and constitute the electrode of ultracapacitor, electrode is processed into certain size after; Lead-in wire in the connection; In the middle of two electrodes, add the fuse that is wound into certain size at a distance from utmost point film, vacuumize, ultracapacitor is processed in encapsulation behind the adding organic electrolyte.
Realize that technical scheme of the present invention is:
(1) prepares collector electrode: choose the feed metal aluminum or aluminum alloy through after the surperficial AC corrosion roughened, as collector electrode;
(2) preparation pole piece: active material and electric conducting material are mixed; Again the compoiste adhering agent solution is joined in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; Compoiste adhering agent solution content is 0.5-3%; Active material is 92-97.5%, and electric conducting material is 2-5%, then said mixture is pressed into the pole piece that thickness is 100-150 μ m; Described compoiste adhering agent solution mixes the compound binding agent that forms for material and the polytetrafluoroethylene with general formula (1) structure; Be dissolved in water, ethanol, isopropyl alcohol or the acetone solvent and be uniformly dispersed; The solution that forms, by weight, the material of general formula (1) is 5-35%; Polytetrafluoroethylene is 65-95%, and the structure of matter of general formula (1) is:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=1-100
(3) preparation electrode: with collector electrode surface-coated one deck conducting resinl, pole piece is sticked to the one or both sides of collector electrode, form electrode;
(4) preparation fuse: behind two measure-alike electrodes connection lead-in wires, sandwich the thick separated utmost point film of 10 ~ 50 μ m therebetween, being wound into diameter is that Φ 16-Φ 65mm highly is the fuse of 20-165mm, then at 100-150 ℃ of following vacuumize 8-72 hour;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition, add energising 10h under the 2.7V direct voltage at 50 ℃ then, be packaged at last in the circular aluminum hull, obtain the ultracapacitor product.
Wherein said feed metal aluminum or aluminum alloy as collector electrode, purity is at least 99.9wt%, and copper content is below the 0.005wt%.Collector electrode requires rough surface, is in order to contact well with pole piece.
The compoiste adhering agent content is 0.5-3% in the pole piece of the present invention; All the other are active material and electric conducting material; Wherein the compoiste adhering agent content is 0.5% and just can reaches the intensity of required pole piece with superior pole piece, but the too high pole piece resistance of binder content becomes greatly, is preferably 1.5-3%.
Described active material is selected one or more compositions with the arbitrary proportion mixing in active carbon, CNT or the Graphene for use, and wherein the specific area of activated carbon is 800-3000m
2/ g, the specific area of CNT is 200-600m
2/ g, the specific area of Graphene is 500-1500 m
2/ g.
Described electric conducting material is graphite, carbon black or acetylene black, and granularity is 0.1-2 μ m.
Described conducting resinl is graphite conductive adhesive, cupric powder conductive adhesive or sliver-powder conducting glue.
Described is that cellulose paper, porous polypropylene, porous Teflon, porous Kynoar, porous polyethylene, porous polypropylene polyethylene are laminated with film or porous polyimide at a distance from utmost point film; Requiring the porosity at a distance from utmost point film is 60-95%, aperture 0.05-0.2 μ m.
Described organic electrolyte is the salt R that contains disassociation property
1R
2R
3R
4NY or R
1R
2R
3R
4NPY is dissolved in and forms in the organic solvent, R
1R
2R
3R
4Be alkyl, identical or inequality, Y is BF
4 -, PF
6 -ClO
4 -Or CF
3SO
3 -Anion; Described organic solvent is propene carbonate, ethylene carbonate, butylene, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, sulfolane, acetonitrile or oxolane, or wherein more than one mix the mixed solvent that forms according to arbitrary proportion.
Compared with prior art, characteristics of the present invention and beneficial effect are:
One or more compositions when existing electrode of super capacitor is made in common employing polytetrafluoroethylene, carboxymethyl cellulose, polyvinyl alcohol, the Kynoar are as binding agent; Adopt a little less than the electrode plates mechanical strength of these binding agents making, be unfavorable for the serialization commercial production; And core of the present invention is to adopt (HO-Si (CH
3)
2O (Si (CH
3)
2O)
nSi (CH
3)
2-OH and polytetrafluoroethylene symbolism binding agent, the electrode of making is soft, mechanical strength is big, is easy to serialization production; Is 50 ℃ to ultracapacitor of the present invention in ambient temperature; Direct voltage is from 2.7V to 1.35V; Electric current is to discharge and recharge the cycle experiment under the condition of 100A, and capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around; Capability retention is 88% after 10,000 times, and this explains that ultracapacitor of the present invention has good capacity stability.
Embodiment
Raw material that the present invention adopts: the material of general formula (1) is from the research institute that becomes more meticulous of Bohai University, and all the other raw materials are the commercially available prod.Embodiment 1
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=2
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 5%, polytetrafluoroethylene 95%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 30 μ m, and roughness is the collector electrode of one-sided thickness 3 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the isopropyl alcohol is uniformly dispersed formation compoiste adhering agent solution; The compoiste adhering agent solution joined in the above-mentioned materials mixed be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2%; Active material is 95%, and electric conducting material is 3%, uses the roller machine to be rolled into the pole piece that thickness is 100 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to a side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned band electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich between wherein 50 μ m thick at a distance from utmost point film; Adopt cellulose paper at a distance from utmost point film; Porosity at a distance from utmost point film is 80%, and the aperture is 0.2 μ m, and being wound into diameter is Φ 35mm; Highly be the fuse of 100mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Add energising 10h under the 2.7V direct voltage at 50 ℃ then; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V700F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
The active material that present embodiment is selected for use is the active carbon of stable electrochemical property, and specific area is 2200m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NBF
4The butylene carbonate ester solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 20A; Capability retention is 93% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 86% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 2
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH?（1）
n=10
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 10%, polytetrafluoroethylene 90%.
(1) prepare collector electrode: aluminum alloy surface is carried out the AC corrosion roughened, and obtaining thickness is 30 μ m, and roughness is the collector electrode of one-sided thickness 3 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the isopropyl alcohol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2%; Active material is 94%, and electric conducting material is 4%, uses the roller machine to be rolled into the pole piece that thickness is 100 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck cupric powder conductive adhesive, pole piece is sticked to a side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich between wherein 50 μ m thick at a distance from utmost point film; Adopt porous polypropylene at a distance from utmost point film; Porosity at a distance from utmost point film is 60%, and the aperture is 0.05 μ m, and being wound into diameter is Φ 20mm; Highly be the fuse of 40mm, with this fuse 150 ℃ of following vacuum drying 8 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V150F.
Described collector electrode adopts purity more than 99.9wt%, the aluminium alloy of copper content below 0.005wt%.
Described active material is the mixture of active carbon, CNT and the Graphene of stable electrochemical property, mass ratio 1:2:6, and the specific area of active carbon is 2200m
2/ g, the specific area of CNT is 200 m
2/ g, the specific area of Graphene is 500 m
2/ g.
The electric conducting material of selecting for use is an acetylene black, and granularity is 1 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NPF
6The solution that mixes according to volume ratio 1:1 of propene carbonate and oxolane.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 20A; Capability retention is 93% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 86% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 3
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=15
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 25%, polytetrafluoroethylene 75%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided thickness 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the water is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2.5%; Active material is 93%, and electric conducting material is 4.5%, and using the roller machine to be rolled into thickness said mixture then is 120 μ m pole pieces;
(3) preparation electrode: with collector electrode surface-coated one deck sliver-powder conducting glue, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, to wherein sandwich 40 μ m thick at a distance from utmost point film; Adopt porous Teflon at a distance from utmost point film; Porosity at a distance from utmost point film is 90%, and the aperture is 0.1 μ m, and being wound into diameter is Φ 50mm; Highly be the fuse of 100mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V2500F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is the CNT of stable electrochemical property and the mixture of Graphene, presses mass ratio 2:8, and wherein the specific area of CNT is 400m
2/ g, the specific area of Graphene is 1500 m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NClO
4Acetonitrile solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 20A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 4
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=30
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 10%, polytetrafluoroethylene 90%.
(1) prepare collector electrode: aluminum alloy surface is carried out the AC corrosion roughened, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided thickness 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the ethanol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2%; Active material is 95%, and electric conducting material is 3%, uses the roller machine to be rolled into the pole piece that thickness is 120 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned band electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich 20 μ m thick at a distance from utmost point film; Adopt porous Teflon at a distance from utmost point film; Porosity at a distance from utmost point film is 80%, and the aperture is 0.1 μ m, and being wound into diameter is Φ 35mm; Highly be the fuse of 100mm, with this fuse 100 ℃ of following vacuum drying 72 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V2000F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is the mixture of active carbon and CNT, and active carbon and CNT mass ratio are 8:2, and the active carbon specific area is 2200m
2/ g, the specific area of CNT is 600 m
2/ g.
The electric conducting material of selecting for use is a carbon black, and granularity is 0.1 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NCF
3SO
3Ethylene carbonate, talk that Sun Ding is careful, solution that dimethyl carbonate and carbonic acid diethyl ester mix according to volume ratio 1:1:1:1.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 50A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 5
The binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=40
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 20%, polytetrafluoroethylene 80%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided thickness 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the acetone is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 0.5%; Active material is 97.5%, and electric conducting material is 2%, uses the roller machine to be rolled into the pole piece that thickness is 120 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned band electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, to wherein sandwich 50 μ m thick at a distance from utmost point film; Adopt the porous Kynoar at a distance from utmost point film; Porosity at a distance from utmost point film is 70%, and the aperture is 0.2 μ m, and being wound into diameter is Φ 35mm; Highly be the fuse of 60mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V500F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is the mixture of active carbon and Graphene, and active carbon and Graphene mass ratio are 8:2, and the active carbon specific area is 2200m
2/ g, the specific area of Graphene is 500 m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
3H
8) NBF
4Dimethyl carbonate solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 50A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 6
The binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=50
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 25%, polytetrafluoroethylene 75%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided thickness 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the ethanol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 1.5%; Active material is 96.5%, and electric conducting material is 2%, uses the roller machine to be rolled into the pole piece that thickness is 120 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned band electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich 50 μ m thick at a distance from utmost point film; Adopt porous polyethylene at a distance from utmost point film; Porosity at a distance from utmost point film is 80%, and the aperture is 0.1 μ m, and being wound into diameter is Φ 25mm; Highly be the fuse of 100mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Add 2.7V direct voltage energising 10h at 50 ℃ then; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V1500F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is the mixture of active carbon and CNT, and active carbon and CNT mass ratio are 8:2, and the active carbon specific area is 2200m
2/ g, the specific area of CNT is 400 m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NBF
4Carbonic acid diethyl ester solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 20A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 7
The compound binding agent that present embodiment adopts is mixed by material with following structure and polytetrafluoroethylene:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=50
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 25%, polytetrafluoroethylene 75%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the ethanol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 3%; Active material is 92%, and electric conducting material is 5%, uses the roller machine to be rolled into the pole piece that thickness is 150 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned band electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich between wherein 50 μ m thick at a distance from utmost point film; Adopt the porous polypropylene polyethylene composite film at a distance from utmost point film; Porosity at a distance from utmost point film is 90%, and the aperture is 0.1 μ m, and being wound into diameter is Φ 30mm; Highly be the fuse of 100mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V1200F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is a CNT, and the specific area of CNT is 600m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NBF
4The methyl ethyl carbonate lipoprotein solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 50A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 8
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=70
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 15%, polytetrafluoroethylene 85%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided thickness 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the ethanol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2.5%; Active material is 94%, and electric conducting material is 3.5%, uses the roller machine to be rolled into the pole piece that thickness is 150 μ m said mixture then;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned electrode is cut into two measure-alike electrodes, behind two electrodes riveted joint lead-in wire, sandwich 20 μ m thick at a distance from utmost point film; Adopt porous polyimide at a distance from utmost point film; Porosity at a distance from utmost point film is 80%, and the aperture is 0.1 μ m, and being wound into diameter is Φ 30mm; Highly be the fuse of 100mm, with this fuse 120 ℃ of following vacuum drying 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V2000F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is an active carbon, and the active carbon specific area is 2200m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NBF
4The methyl ethyl carbonate lipoprotein solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 50A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Embodiment 9
The compound binding agent that present embodiment adopts is mixed by material and polytetrafluoroethylene with following general formula (1) structure:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=80
Each constituent content is pressed mass ratio in the compound binding agent, and the material of general formula (1) is 20%, polytetrafluoroethylene 80%.
(1) prepare collector electrode: the AC corrosion roughened is carried out on the metallic aluminium surface, and obtaining thickness is 20 μ m, and roughness is the collector electrode of one-sided 2 μ m;
(2) preparation pole piece: active material and electric conducting material are mixed, compound binding agent is dissolved in the ethanol is uniformly dispersed formation compoiste adhering agent solution; Join in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; The compoiste adhering agent content is 2%; Active material is 94%, and electric conducting material is 4%, and using the roller machine to be rolled into thickness said mixture then is 150 μ m pole pieces;
(3) preparation electrode: with collector electrode surface-coated one deck graphite conductive adhesive, pole piece is sticked to the both side surface of collector electrode, form band electrode;
(4) preparation fuse: above-mentioned electrode is cut into two measure-alike electrodes, behind two electrode riveted joint lead-in wires, between wherein, sandwiches the thick separated utmost point film of 20 μ m; Adopt porous Teflon at a distance from utmost point film, the porosity of separated utmost point film is 80%, and thickness is 20 μ m; The aperture is 0.1 μ m; Being wound into diameter is Φ 30mm, highly is the fuse of 100mm, with this fuse 120 ℃ of following vacuumizes 48 hours;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition; Fuse behind the dipping organic electrolyte is added 2.7V direct voltage energising 10h at 50 ℃; Be loaded at last in the circular aluminum hull; Both positive and negative polarity adopts the laser machine to be welded on aluminum hull respectively and seals behind the two ends up and down, obtains the ultracapacitor product of rated operational voltage 2.7V1500F.
Described collector electrode adopts purity more than 99.9wt%, the metallic aluminium of copper content below 0.005wt%.
Described active material is an active carbon, and the active carbon specific area is 2200m
2/ g.
The electric conducting material of selecting for use is a graphite, and granularity is 2 μ m.
The organic electrolyte of selecting for use is (the C of 1.0mol/L
2H
5) NBF
4Tetrahydrofuran solution.
In ambient temperature is 50 ℃; Direct voltage is from 2.7V to 1.35V; Electric current is that the ultracapacitor to present embodiment discharges and recharges the cycle experiment under the condition of 50A; Capability retention is 92% after 20,000 times, and temperature is to carry out the same cycle that discharges and recharges experiment under 65 ℃ the condition around, and capability retention is 88% after 10,000 times; When separating metallic aluminium collector electrode and pole piece, at the active material of the residual volume of collector electrode one side with cutter.
Claims (7)
1. the preparation method of a ultracapacitor is characterized in that carrying out according to following steps:
(1) prepares collector electrode: choose the feed metal aluminum or aluminum alloy through after the surperficial AC corrosion roughened, as collector electrode;
(2) preparation pole piece: active material and electric conducting material are mixed; Again the compoiste adhering agent solution is joined in the above-mentioned materials mixed and be uniformly dispersed, form mixture, wherein by mass percentage; Compoiste adhering agent solution content is 0.5-3%; Active material is 92-97.5%, and electric conducting material is 2-5%, then said mixture is pressed into the pole piece that thickness is 100-150 μ m; Described compoiste adhering agent solution mixes the compound binding agent that forms for material and the polytetrafluoroethylene with general formula (1) structure; Be dissolved in water, ethanol, isopropyl alcohol or the acetone solvent and be uniformly dispersed; The solution that forms, by weight, the material of general formula (1) is 5-35%; Polytetrafluoroethylene is 65-95%, and the structure of matter of general formula (1) is:
（HO－Si（CH
3）
2?O〔Si（CH
3）
2?O〕
nSi(CH
3)
2-OH（1）
n=1-100
(3) preparation electrode: with collector electrode surface-coated one deck conducting resinl, pole piece is sticked to the one or both sides of collector electrode, form electrode;
(4) preparation fuse: behind two measure-alike electrodes connection lead-in wires, sandwich the thick separated utmost point film of 10 ~ 50 μ m therebetween, being wound into diameter is that Φ 16-Φ 65mm highly is the fuse of 20-165mm, then at 100-150 ℃ of following vacuumize 8-72 hour;
(5) encapsulation: fuse is flooded organic electrolyte under vacuum condition, add energising 10h under the 2.7V direct voltage at 50 ℃ then, be packaged at last in the circular aluminum hull, obtain the ultracapacitor product.
2. the preparation method of a kind of ultracapacitor according to claim 1 is characterized in that described feed metal aluminum or aluminum alloy as collector electrode, and purity is at least 99.9wt%, and copper content is below the 0.005wt%.
3. the preparation method of a kind of ultracapacitor according to claim 1; It is characterized in that described active material selects for use in active carbon, CNT or the Graphene one or more with compositions that arbitrary proportion mixes, wherein the specific area of activated carbon is 800-3000m
2/ g, the specific area of CNT is 200-600m
2/ g, the specific area of Graphene is 500-1500 m
2/ g.
4. the preparation method of a kind of ultracapacitor according to claim 1 is characterized in that described electric conducting material is graphite, carbon black or acetylene black, and granularity is 0.1-2 μ m.
5. the preparation method of a kind of ultracapacitor according to claim 1 is characterized in that described conducting resinl is graphite conductive adhesive, cupric powder conductive adhesive or sliver-powder conducting glue.
6. the preparation method of a kind of ultracapacitor according to claim 1; It is characterized in that described is that cellulose paper, porous polypropylene, porous Teflon, porous Kynoar, porous polyethylene, porous polypropylene polyethylene are laminated with film or porous polyimide at a distance from utmost point film; Porosity at a distance from utmost point film is 60-95%, aperture 0.05-0.2 μ m.
7. the preparation method of a kind of ultracapacitor according to claim 1 is characterized in that described organic electrolyte is the salt R that contains disassociation property
1R
2R
3R
4NY or R
1R
2R
3R
4NPY is dissolved in and forms in the organic solvent, R
1R
2R
3R
4Be alkyl, identical or inequality, Y is BF
4 -, PF
6 -ClO
4 -Or CF
3SO
3 -Anion; Described organic solvent is propene carbonate, ethylene carbonate, butylene, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, sulfolane, acetonitrile or oxolane, or wherein more than one mix the mixed solvent that forms according to arbitrary proportion.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824701A (en) * | 2014-03-11 | 2014-05-28 | 中国第一汽车股份有限公司 | Active graphene composite electrode material |
| CN103839683A (en) * | 2012-11-23 | 2014-06-04 | 海洋王照明科技股份有限公司 | Graphene electrode plate and preparation method thereof |
| CN103839696A (en) * | 2012-11-23 | 2014-06-04 | 海洋王照明科技股份有限公司 | Graphene electrode plate, and preparation method and application thereof |
| CN106206047A (en) * | 2016-08-30 | 2016-12-07 | 江苏超电新能源科技发展有限公司 | Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof |
| CN109637822A (en) * | 2018-12-19 | 2019-04-16 | 大连理工大学 | A kind of TiN electrode of high-specific surface area, preparation method and applications |
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| US3657379A (en) * | 1970-07-02 | 1972-04-18 | Ncr Co | Intercrossing resin/curing agent adhesive systems |
| CN101299398A (en) * | 2008-05-29 | 2008-11-05 | 锦州凯美能源有限公司 | Method for preparing super capacitor |
| CN101710538A (en) * | 2009-11-27 | 2010-05-19 | 锦州凯美能源有限公司 | Method for manufacturing long-life electrode of super capacitor |
-
2011
- 2011-12-29 CN CN2011104502431A patent/CN102543480A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657379A (en) * | 1970-07-02 | 1972-04-18 | Ncr Co | Intercrossing resin/curing agent adhesive systems |
| CN101299398A (en) * | 2008-05-29 | 2008-11-05 | 锦州凯美能源有限公司 | Method for preparing super capacitor |
| CN101710538A (en) * | 2009-11-27 | 2010-05-19 | 锦州凯美能源有限公司 | Method for manufacturing long-life electrode of super capacitor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839683A (en) * | 2012-11-23 | 2014-06-04 | 海洋王照明科技股份有限公司 | Graphene electrode plate and preparation method thereof |
| CN103839696A (en) * | 2012-11-23 | 2014-06-04 | 海洋王照明科技股份有限公司 | Graphene electrode plate, and preparation method and application thereof |
| CN103824701A (en) * | 2014-03-11 | 2014-05-28 | 中国第一汽车股份有限公司 | Active graphene composite electrode material |
| CN106206047A (en) * | 2016-08-30 | 2016-12-07 | 江苏超电新能源科技发展有限公司 | Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof |
| CN109637822A (en) * | 2018-12-19 | 2019-04-16 | 大连理工大学 | A kind of TiN electrode of high-specific surface area, preparation method and applications |
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Application publication date: 20120704 |