CN101937774B - Preparation method of winding type super capacitor - Google Patents
Preparation method of winding type super capacitor Download PDFInfo
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- CN101937774B CN101937774B CN 201010217061 CN201010217061A CN101937774B CN 101937774 B CN101937774 B CN 101937774B CN 201010217061 CN201010217061 CN 201010217061 CN 201010217061 A CN201010217061 A CN 201010217061A CN 101937774 B CN101937774 B CN 101937774B
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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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
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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
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- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention provides a preparation method of a winding type super capacitor, which comprises the following steps: 1) selecting the direct growth method for preparing a carbon nanotube thin film as an electrode material; 2) cutting the carbon nanotube thin film into a plurality of carbon nanotube thin film small pieces; 3) flatly laying a long strip-shaped separator film in a volatile organic solvent; 4) sequentially flatly laying the plurality of the carbon nanotube thin film small pieces on the separator film in a head-to-tail connection manner till the organic solvent on the separator film which is laid on the carbon nanotube thin film is completely volatilized; and 5) winding and packaging the separator film and obtaining the winding type super capacitor. The invention firstly successfully prepares the winding type super capacitor with a carbon nanotube thin film electrode and can greatly improve the electrical conductivity of the winding type super capacitor, reduce the equivalent series resistance of the super capacitor, further improve the energy and the power density of the carbon nanotube thin film winding type super capacitor and show good power characteristic and current response.
Description
Technical field
Present embodiment relates to technical field of electrochemistry, specifically, the present invention relates to a kind of winding type super capacitor and preparation method thereof.
Background technology
Ultracapacitor also is electrochemical capacitor, is a kind of novel energy-storing device, and its performance has the characteristics of battery high-energy-density and traditional capacitor high-specific-power concurrently between traditional capacitor and battery.Its capacity can reach farad level even thousands of farad, and quality is 20～200 times of traditional capacitor than capacitance or volumetric capacitance amount, and energy density is 10～100 times of traditional capacitor.Simultaneously, the power density ratio battery of ultracapacitor is high about 10 times, and cycle life also is superior to battery, and cycle-index can reach 106 times.In addition, ultracapacitor also has characteristics such as efficiency for charge-discharge height, safety, can be used as great power pulse power source, all has wide practical use in many fields such as data accumulating storage system, portable instrument equipment, communication apparatus, electric vehicle mixed powers.
In the prior art, ultracapacitor mainly contains two kinds of versions: a kind of is the button-shaped capacitor of sandwich laminated construction, and another kind is around the Wound capacitor that gets up to form with electrode slice and membrane coil.Button-shaped ultracapacitor is difficult to hold broad-area electrode, and this has limited the raising of button-shaped ultracapacitor capacitance, and button-shaped ultracapacitor can need bear big pressure.Wound capacitor can hold large-area electrode, easy realization of industrialization, and the ultracapacitor of suitable preparation high power capacity, but its electrode material must have the characteristics that softness can be rolled over, so its electrode material applicatory receives than limitations.The restriction of electrode material often becomes one of main bottleneck of winding type super capacitor various aspects of performance raising.
At present, the main electrode material of winding type super capacitor is active carbon fiber fabrics (ACFC).Its defective comprises: 1, the preparation more complicated of activated carbon fiber cloth; And its conductivity is lower; Must will improve its conductivity at its surface deposition layer of aluminum film earlier as before the electrode, and the existence of aluminium film will cause inorganic electrolyte liquid such as sulfuric acid solution to use.2, the equivalent series resistance of active carbon fiber fabrics ultracapacitor (ESR) is bigger, and this causes the power density of active carbon fiber fabrics lower.
On the other hand, there have been at present some to utilize based on the thin-film material of CNT report as button-shaped electrode material for super capacitor.Research shows that power characteristic and frequency characteristic all are much better than common electrode materials such as active carbon and charcoal-aero gel based on the specific area utilance of the thin-film material of CNT.Electrode material for super capacitor based on carbon nano-tube film mainly contains two kinds at present: 1. through CNT is mixed with conducting polymer, then mixture is coated onto on the conductive substrates as thin-film electrode material (being designated hereinafter simply as the carbon nanotube polymer film).2. the pure nano-carbon tube film that in substrate, prepares (being the pure nano-carbon tube film of strip substrate).
1. for the carbon nanotube polymer membrane electrode; Because the adding of polymer will reduce the conductance and the porosity rate of carbon nanotube electrode; Transfer and the diffusion of electrolyte intermediate ion in electrode gap in electrode has adverse effect to electric charge, cause the ultracapacitor power density to descend, and the carbon nanotube polymer film must use metallic substrates to collect and transfer charge as current collector; The use of metallic substrates will increase the weight of capacitor, influences its actual use; In addition; The preparation of carbon nanotube polymer membrane electrode is complicated; Controllable thickness property is poor, and the ratio capacity ratio of carbon nanotube polymer ultracapacitor is less, compares electric capacity though the polymer through activated carbon nano-tube can improve it; But activation need at high temperature be carried out, and the conductive substrates of therefore a lot of non-refractories can't be used.In addition, but the pliable and tough folding endurance of metallic substrates and carbon nanotube polymer is all relatively poor, and therefore the ultracapacitor based on the carbon nanotube polymer electrode is commonly button-shaped structure, is difficult to be applicable to winding type super capacitor.
2. the pure nano-carbon tube film of strip substrate has high conductivity and loose structure, can be directly as the electrode material of ultracapacitor.Yet the adhesion of carbon nano-tube film and substrate is smaller, if substrate and one of carbon nano-tube film are curled, and the easy and substrate disengaging of carbon nano-tube film.In addition, but the pliable and tough folding endurance of substrate is relatively poor, causes suprabasil carbon nano-tube film to be difficult to directly be used to prepare winding type super capacitor.
In sum; Winding type super capacitor can hold large-area electrode; To improve its capacitance, can be used as high power capacity, great power pulse power source; Yet its electrode material need have that softness can be rolled over and characteristic such as difficult drop-off, has so just limited to have the more application of the thin-film electrode material of high conductivity and porosity rate.Therefore, current press for a kind of can be with the solution of the thin-film material with more high conductivity and porosity rate as the Wound capacitor electrode.
Summary of the invention
The purpose of this invention is to provide the method for Wound capacitor that a kind of preparation has the thin-film electrode material of high conductivity and porosity rate.
For realizing the foregoing invention purpose, winding type super capacitor preparation method provided by the invention comprises the following steps:
1) carbon nano-tube film of selecting the preparation of direct growth method is as electrode material;
2) said carbon nano-tube film is cut into the carbon nano-tube film fritter of polylith regular shape;
3) barrier film with strip is tiled in the volatile organic solvent;
4) the end to end successively Horizon of polylith carbon nano-tube film small pieces is taped against on the said barrier film; The organic solvent of waiting to be covered with on the said barrier film of carbon nano-tube film volatilizees fully;
5) with said membrane coil around and encapsulate, obtain said winding type super capacitor.
Wherein, said step 2) in, the little block length of said carbon nano-tube film is 5-10cm, width is 1-5cm.
Wherein, in the said step 3), said organic solvent liquid level is higher than said membrane surface 0.5mm～1mm.
Wherein, said step 4) comprises following substep:
41) a carbon nano-tube film fritter is immersed in the said volatile organic solvent, on its said barrier film that evenly stretches and tile;
The said barrier film that 42) will be covered with carbon nano-tube film is mentioned from said volatile organic solvent, treats that organic solvent volatilizees fully;
43) repeating step 41) to 42), the end to end in the longitudinal direction successively Horizon of polylith carbon nano-tube film small pieces is taped against on the said barrier film.
Wherein, said step 41) also comprise: said carbon nano-tube film fritter is when being stretched, and keeping the carbon nano-tube film tensile stress is 50GPa～150GPa.
Wherein, said step 42) also comprise: mention an end of barrier film, the barrier film that at the uniform velocity will be covered with carbon nano-tube film with the speed of 3～5cm/min is then mentioned from said organic solvent.
Wherein, said step 43) in, align on adjacent two carbon nano-tube film fritter Widths, have the lap of 1～2mm on the length direction; The width of barrier film than the wide 2-3mm of the carbon nano-tube film of spreading, the long 1-3cm of length.
Wherein, said step 43) also comprise: polylith carbon nano-tube film fritter multilayer is overlapping, make said carbon nano-tube film arrive desired thickness.
Compared with prior art, the present invention has following technique effect:
1, successfully prepares winding type super capacitor first with carbon nano-tube film electrode; Greatly improved the conductivity of winding type super capacitor electrode; Reduced the equivalent series resistance of ultracapacitor; Thereby improved the energy and the power density of carbon nano-tube film winding type super capacitor, shown good power characteristic and current response.
2, can guarantee that the winding type super capacitor electrode has very high evenness.
3, can guarantee that the winding type super capacitor electrode has very high consistency of thickness, and then strengthen the stability of winding type super capacitor.
4, the controllability of the thickness of electrode and area is strong, does not receive the restriction of carbon nano-tube film original area and thickness.
5, need not use metallic substrates as current collector, reduce the weight of capacitor, improve the adaptability of capacitor electrolyte.
6, technology is comparatively simple, and rate of finished products is high.
Description of drawings
Below, specify embodiments of the invention in conjunction with accompanying drawing, wherein:
Fig. 1 is the tiling mode and the carbon nano-tube film winding type super capacitor preparation method's of carbon nano-tube film on a barrier film of the present invention sketch map;
Fig. 2 is the cyclic voltammetry curve figure of carbon nano-tube film winding type super capacitor under different scanning rates of one embodiment of the invention;
Fig. 3 is the impedance spectrum of the carbon nano-tube film winding type super capacitor of one embodiment of the invention;
Fig. 4 is the charging and discharging curve figure of the carbon nano-tube film winding type super capacitor of one embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment; From selection of electrode materials; The preparation of carbon nano-tube film electrode, the combination property measured data of the assembling of carbon nano-tube film winding type super capacitor and carbon nano-tube film winding type super capacitor is done further explanation and explanation to the present invention.
One, selection of electrode materials
The carbon nano-tube film that present embodiment uses directly utilizes floating catalytic chemical vapour deposition technique growth (hereafter is the direct growth method) to obtain.Different with the carbon nanotube polymer film, the carbon nano-tube film of direct growth method preparation can directly tile on the barrier film as the positive and negative electrode material, need not use metallic substrates as current collector.Simultaneously, adsorptivity is strong, and with respect to the carbon nano-tube film of back sedimentation preparation, the carbon nano-tube film of direct growth method preparation has advantages such as pliability is strong, adsorptivity is strong, therefore is suitable for the electrode material as winding type super capacitor.As electrode material, the area of carbon nano-tube film, thickness can be adjusted as required.Carbon nano-tube film also can carry out functionalization (like preliminary treatment, activation, modification etc.).
Two, the preparation of carbon nano-tube film electrode
1, carbon nano-tube film is cut into required size.
Winding type super capacitor needs the electrode material of long strip of length.And that the carbon nano-tube film of direct growth method preparation has is very strong from adsorptivity, and the carbon nano-tube film that length is long is difficult to directly evenly tile on the barrier film, and this inhomogeneous inconsistency that causes will reduce the stability of ultracapacitor.In addition, the area of the carbon nano-tube film of direct growth method preparation is limited, and therefore, the way that the invention property ground proposes to splice behind the first piecemeal guarantees the uniformity of carbon nano-tube film electrode.Simultaneously, this method has also been expanded the area of carbon nano-tube film electrode, and the area of carbon nano-tube film of having broken through the preparation of direct growth method is to the restriction of electrode of super capacitor area.Present embodiment, the width of monolithic carbon nano-tube film are at 1-5cm, and length is described for convenient at 5-10cm, is referred to as the carbon nano-tube film fritter among this paper, abbreviates the film fritter as.The width of above-mentioned film fritter and length select to have taken all factors into consideration each side factors such as tiling operation and capacitor design.Every carbon nano-tube film area is big more, and is just more difficult with on its barrier film that evenly tiles in the process of tiling; And area is more little, then causes the electrode splicing number of times of equal length too much, and contact resistance increases, the consistency of thickness variation.And the consistency of thickness difference will cause the electric capacity of ultracapacitor to descend, and also cause the stability of ultracapacitor to reduce simultaneously.
In addition, because the carbon nano-tube film that the used direct growth method of present embodiment prepares is strong from adsorptivity, be difficult to directly carbon nano-tube film cut into the needed size of preparation winding type super capacitor.Therefore in the present embodiment, elder generation clips to carbon nano-tube film in the middle of two pan papers, utilizes cutting implement that it is cut into needed shape and size again.Because the special surface of pan paper, carbon nano-tube film can be from its complete stripping down in surface.Simultaneously, present embodiment also need cut into needed shape and size with barrier film.
2, the film fritter is tiled on the barrier film successively, and make each film fritter be spliced to form complete electrode successively.
(1) for the film fritter that tiles equably, present embodiment use volatile organic solvent (like ethanol or acetone) reduce the film fritter from adsorptivity.In this step, be dipped in the said organic solvent, and make the height of organic solvent exceed barrier film and carbon nano-tube film thickness 0.5mm to 1mm with shearing good barrier film.Because said organic solvent is volatile; Present embodiment also need utilize conduit uninterruptedly to add organic solvent; And control the organic solvent liquid level through the flow velocity of organic solvent in the control conduit, make it exceed 0.5-1mm all the time with respect to barrier film (carbon nano-tube film thickness is much smaller than membrane thicknesses).
(2) carbon nano-tube film also is dipped in the said organic solvent; In organic solvent, along the direction at four angles of carbon nano-tube film CNT is stretched at first simultaneously; Then little stretching adjustment is carried out on each limit of carbon nano-tube film, removed wrinkling, carbon nano-tube film is evenly tiled on the barrier film; In drawing process, be 50GPa～150GPa to the carbon nano-tube film tensile stress to carbon nano-tube film.Tensile stress is crossed senior general and is caused carbon nano-tube film to break, and tensile stress is too small then to be difficult to remove fold, causes electrode inhomogeneous.
(3) after on carbon nano-tube film tiles barrier film; One end of mentioning barrier film; The barrier film that at the uniform velocity will be covered with carbon nano-tube film with the speed of 3～5cm/min is then mentioned from organic solvent, in air, lets the organic solvent on barrier film and the carbon nano-tube film volatilize fully.Because carbon nano-tube film can adsorb a large amount of organic solvents; Carbon nano-tube film does not recover from absorption affinity as yet in mentioning process; Can not be firm be adsorbed onto on the barrier film, therefore, if mention the excessive velocities (as greater than 5cm/min) of barrier film; Carbon nano-tube film landing from the barrier film easily influences its evenness on barrier film.On the other hand, mention speed and cross and to cause production efficiency low excessively slowly, find through a large amount of experiments; When speed is lower than 3cm/min; Further underspeeding to make the evenness of carbon nano-tube film obviously improve, and therefore, the speed of mentioning barrier film generally is not less than 3cm/min.
(4) successively polylith film fritter is tiled on the barrier film by above-mentioned steps (2), (3), and make each film fritter be spliced to form complete electrode successively end to end.
Wherein said splicing end to end is exactly that polylith film fritter aligns on Width, the tiling that joins end to end in the longitudinal direction, and the lap on adjacent two film fritter length directions is 1～2mm.Lap can cause the ratio electric capacity of ultracapacitor to reduce too much, and lap then can increase the contact resistance between the carbon nano-tube film very little, influences the power density of ultracapacitor.Therefore the lap on adjacent in a preferred embodiment two film fritter length directions is defined as 1～2mm.
In the present embodiment; The width of the carbon nano-tube film that the tiling back is total should be less than the width of barrier film; Little 2-3mm is generally wanted at the edge of carbon nano-tube film Edge Distance barrier film; The length of total carbon nano-tube film also should be less than the width of barrier film, and 1-3cm is generally wanted apart from the length at the two ends of barrier film respectively in the two ends of carbon nano-tube film.The tile overall size (as: thickness and area) of the carbon nano-tube film on the barrier film, i.e. the size of capacitor film electrode is with capacitance that directly influences prepared ultracapacitor and volume.
Usually, when the thinner thickness of carbon nano-tube film electrode, the ratio electric capacity of carbon nano-tube film ultracapacitor is bigger; But when the ultracapacitor of assembling same electrical capacity, thin carbon nano-tube film is as electrode; The area of carbon nano-tube film electrode is bigger; The diaphragm area that needs is just big, and the thickness of barrier film is greater than the thickness of carbon nano-tube film, so big with the volume of this ultracapacitor of preparing; Therefore; For reducing carbon nano-tube film ultracapacitor volume; Can suitably increase the thickness of carbon nano-tube film electrode through the mode of being layering; Yet when the thickness of carbon nano-tube film electrode is thicker, within the specific limits, the ratio electric capacity of carbon nano-tube film ultracapacitor will increase with the thickness of membrane electrode and reduce.Therefore; When the ultracapacitor of assembling same electrical capacity, the thickness of membrane electrode increases, and the total amount of required carbon nano-tube film just increases; In sum, the size of carbon nano-tube film electrode need be looked the ratio electric capacity of ultracapacitor and the specific requirement of volume is confirmed.
In the present embodiment; The gross area of carbon nano-tube film can be expanded according to the capacitance of winding type super capacitor; Can be much larger than the original area of the carbon nano-tube film of direct preparation, promptly the electrode area of winding type super capacitor can not receive the restriction of the original area of carbon nano-tube film.
In addition; The all right multilayer of film fritter is overlapping with control electrode thickness among the present invention; Multilayer is overlapping to be on the overlapping barrier film that tiles of polylith film fritter; The number of plies that the thickness of carbon nano-tube film electrode overlaps is proportional, and the gross thickness of carbon nano-tube film generally is controlled at 300nm-100 μ m.The overlapping implementation of multilayer promptly repeats the mode of above-mentioned steps (2), (3), one by one the film fritter is tiled.Specifically, at first ground floor film fritter is tiled on the barrier film, then successively on the preceding thin film fritter according to the method tiling of step (2), (3) under the thin film fritter, reach necessary requirement until the gross thickness of carbon nano-tube film.
In another embodiment, can also splicing and overlapping dual mode be mixed, with the length and the thickness of while controlling carbon nanotube membrane electrode.Can be only tiling ground floor, the 3rd layer, during odd-levels such as layer 5, each film fritter is spliced in the longitudinal direction, and at the tiling second layer, the 4th layer when waiting even level, the film fritter can not splice in the longitudinal direction.The 3rd layer, the standard when odd-levels such as layer 5 splice is consistent with ground floor.The area and the number of plies of the carbon nano-tube film of spreading on the barrier film can decide according to factors such as the size of required carbon nano-tube film winding type super capacitor and capacitances.Fig. 1 (a) part shows the electrode 1 that only has overlay structure respectively, has an electrode 2 of overlapping and splicing construction and only have the electrode 3 of splicing construction simultaneously.
Three, the assembling of carbon nano-tube film winding type super capacitor
Two identical barrier films that are covered with the carbon nano-tube film electrode are overlapping, and shown in Fig. 1 (b) part, wherein 4 is barrier film, and 5 is electrode.Carbon nano-tube film electrode on two barrier films will guarantee that when overlapping barrier film is spaced-apart.Utilize spool with above-mentioned two overlapping membrane coil around, the length of spool greater than barrier film width 0.3～0.5cm, the carbon nano-tube film on two barrier films is respectively as positive and negative two electrodes of ultracapacitor; The lead-in wire of extraction electrode in the winding process; The contact length of contact conductor and carbon nano-tube film is assembled into the barrier film of reeling in the shell of ultracapacitor generally at 0.5～1cm, adds electrolyte; Finally sealed assembling ultracapacitor is shown in Fig. 1 (c) part.
Four, the combination property measured data of carbon nano-tube film winding type super capacitor
In this test, be the electrode material of the unsupported carbon nano-tube film of independence of 400nm as winding type super capacitor with the thickness of direct growth.The length of carbon nano-tube film fritter and wide 10cm and the 1.2cm of being respectively; Barrier film is Celgard 2325, long and wide 25cm and the 1.6cm of being respectively.Electrolyte is Lithium perchlorate anhydrous's solution (solvent is 1: 1: 1 a diethyl carbonate of mol ratio, ethylene carbonate, dimethyl carbonate) of 1M.
The chemical property that below is above-mentioned carbon nano-tube film winding type super capacitor characterizes:
1. the cyclic voltammetry curve of the carbon nano-tube film winding type super capacitor of present embodiment preparation
Fig. 2 for cyclic voltammetry curve under different scanning rates of the carbon nano-tube film winding type super capacitor of present embodiment preparation (sweep speed is respectively 2mV/s, 10mV/s, 50mV/s).Fig. 2 shows: the cyclic voltammetry curve of the carbon nano-tube film winding type super capacitor of present embodiment preparation is approximately rectangle in the potential range that detects; This carbon nano-tube film winding type super capacitor that shows the present embodiment preparation is pure double electric layer capacitor, and for potential inversion good current response is arranged.Capacitance increases with the increase of sweep speed, but constant basically with respect to the specific capacitance of carbon nano-tube film quality, shows that it has good power characteristic.
2. the impedance spectrum of the carbon nano-tube film winding type super capacitor of present embodiment preparation
Fig. 3 is the impedance spectrum of the carbon nano-tube film winding type super capacitor of present embodiment preparation.As can beappreciated from fig. 3 the imaginary part of the impedance of capacitor increases sharply under low frequency, has proved the electric capacity behavior of carbon nanotube electrode.
3. the charging and discharging curve of the carbon nano-tube film winding type super capacitor of present embodiment preparation
Fig. 4 is the charging and discharging curve of the carbon nano-tube film winding type super capacitor of present embodiment preparation; Charging current is 5mA; As can beappreciated from fig. 4 the efficiency for charge-discharge of the carbon nano-tube film winding type super capacitor of present embodiment preparation is very near 100%; The cut-ff voltage of capacitor work and the difference of discharge initiation voltage are very little; This equivalent series resistance (ESR) that shows the carbon nano-tube film ultracapacitor that present embodiment prepares is very little, and the quality of the carbon nano-tube film winding type super capacitor that the present embodiment that is calculated by charging and discharging curve prepares is 25F/g than electric capacity, volumetric capacitance 65F/cm
3, energy density is 13.6Wh/kg, power density is 83.3kW/kg.The equivalent series resistance (ESR) of the carbon nano-tube film ultracapacitor of present embodiment preparation is about 200m Ω/cm
2, (latter's ESR value is greater than 1 Ω/cm to be far smaller than the value of the active carbon fiber fabrics ultracapacitor of reporting in the document
2) (Journal ofApplied Electrochemistry (2005) 35:1067-1072), and volumetric capacitance is greater than the value (Journal of Applied Electrochemistry (2005) 35:1067-1072) of the active carbon fiber fabrics ultracapacitor of reporting in the document; In addition; The energy density of the energy density of the carbon nano-tube film ultracapacitor of present embodiment preparation and the ultracapacitor of electrode materials such as power density values and general active carbon fiber fabrics and power density values (latter's energy density is generally less than 10Wh/kg, and power density is generally less than 30kW/kg) are compared and are significantly improved.
The above embodiments only are used for explaining this explanation, and it should not be construed is that protection range to this explanation carries out any restriction.And, it will be apparent to those skilled in the art that do not breaking away under present embodiment spirit and the principle, to various equivalent variation that present embodiment carried out, modification and in the text not the various improvement of description all within the protection range of this patent.
Claims (7)
1. a winding type super capacitor preparation method comprises the following steps:
1) carbon nano-tube film of selecting the preparation of direct growth method is as electrode material;
2) said carbon nano-tube film is cut into a plurality of carbon nano-tube film fritters;
3) barrier film with strip is tiled in the volatile organic solvent, and said organic solvent liquid level is higher than said membrane surface 0.5mm～1mm;
4) the end to end successively Horizon of polylith carbon nano-tube film fritter is taped against on the said barrier film; The organic solvent of waiting to be covered with on the said barrier film of carbon nano-tube film volatilizees fully;
5) with said membrane coil around and encapsulate, obtain said winding type super capacitor.
2. winding type super capacitor preparation method according to claim 1 is characterized in that, said step 2) in, the little block length of said carbon nano-tube film is 5-10cm, width is 1-5cm.
3. winding type super capacitor preparation method according to claim 1 is characterized in that, said step 4) comprises following substep:
41) a carbon nano-tube film fritter is immersed in the said volatile organic solvent, on its said barrier film that evenly stretches and tile;
The said barrier film that 42) will be covered with carbon nano-tube film is mentioned from said volatile organic solvent, treats that organic solvent volatilizees fully;
43) repeating step 41) to 42), the end to end in the longitudinal direction successively Horizon of polylith carbon nano-tube film fritter is taped against on the said barrier film.
4. winding type super capacitor preparation method according to claim 3 is characterized in that, said step 41) also comprise: said carbon nano-tube film fritter is when being stretched, and keeping the carbon nano-tube film tensile stress is 50GPa～150GPa.
5. winding type super capacitor preparation method according to claim 3; It is characterized in that; Said step 42) also comprise: mention an end of barrier film, the barrier film that at the uniform velocity will be covered with carbon nano-tube film with the speed of 3～5cm/min is then mentioned from said organic solvent.
6. winding type super capacitor preparation method according to claim 3, said step 43) in, align on adjacent two carbon nano-tube film fritter Widths, have the lap of 1～2mm on the length direction; The width of barrier film than the wide 2-3mm of the carbon nano-tube film of spreading, the long 1-3cm of length.
7. winding type super capacitor preparation method according to claim 3, said step 43) also comprise: polylith carbon nano-tube film fritter multilayer is overlapping, make said carbon nano-tube film arrive desired thickness.
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| CN102810360B (en) * | 2012-07-31 | 2016-03-30 | 中国科学院物理研究所 | A kind of method of thinning carbon nano-tube film |
| CN103337376B (en) * | 2013-05-06 | 2016-08-03 | 中国科学院物理研究所 | A kind of all solid state winding type super capacitor and preparation method thereof |
| JP6812533B1 (en) * | 2019-12-27 | 2021-01-13 | トクセン工業株式会社 | Manufacturing method for long products made of carbon nanotubes |
| CN113027664B (en) * | 2021-03-23 | 2022-08-05 | 华中科技大学 | Wave energy recovery device and method based on electrochemical principle |
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| CN101471184A (en) * | 2007-12-27 | 2009-07-01 | 清华大学 | Super capacitor |
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