CN102610397A - High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof - Google Patents
High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a high-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and a manufacturing method of the high-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece, which belongs to new energy material technology and relative field; high-power charging/discharging capacity of a hybrid asymmetric super-capacitor is enhanced effectively; after lithium is led to cathode, a potential window of the hybrid asymmetric super-capacitor is widened; energy density of the super-capacitor is increased effectively; finally, the super-capacitor is encapsulated by soft package; production efficiency of the super-capacitor is also increased greatly; and production cost is reduced.
Description
Technical field
The present invention relates to high-power embedding cathode of lithium and mix in asymmetric the ultracapacitor pole piece, particularly positive electrode active materials and introduced carbon nano-fiber and/or CNT, improved the power density of mixing asymmetric ultracapacitor, and anode material of lithium battery LiCoO
2Adding when making the graphite embedding lithium in the negative material, the potential drop that also makes negative material has been widened the operation potential window that mixes asymmetric ultracapacitor to 0.21V (VS.Li/Li+).Belong to technical field of new energies.
Background technology
Electrochemical capacitor in double electrode layer (EDLC) is called ultracapacitor (supercapacitor) again; Be one type and utilize absorption that electrochemical double-layer or electrode material take place at electrode/solution interface or desorption and the device of stored energy has cycle life overlength (≤10
5Inferior), the safe and reliable fast characteristics of (0.3 second ~ 15 minutes) that discharge and recharge.Consider that from the angle of environmental protection its used electrode active material is a kind of green energy resource (active carbon), free from environmental pollution.
The operation principle of ultracapacitor is that pair of electrodes all is immersed in the electrolyte solution, and when applying the decomposition voltage that is lower than electrolyte solution to electrode, at the interface of solid electrode and electrolyte solution, electric charge can be arranged evenly in extremely short distance.As compensation; Positively charged positive pole can attract the anion in the solution, and is opposite, and negative pole attracts cation; Thereby form electric double layer closely; The stored charge at the interface of electrode and electrolyte solution, but electric charge can not pass the interface of electrode and electrolyte solution, and the electric current that in this process, is produced is to be reset and the displacement current of generation by electric charge basically.Its energy is stored in the surface of electrode material with electric charge or concentrated electronics.But also come from the electric double layer of electrode active material and electrolyte solution generation, cause the energy density of ultracapacitor lower, have only 5Wh/kg-8Wh/kg, therefore also limited its application aspect energy storage just because of the energy of system storage.Remarkable advantages such as lithium ion battery has the operating voltage height, energy density is big, self-discharge rate is low, memory-less effect, therefore the present lithium ion battery of developing is mainly used in the main driving power of environmentally friendly vehicle, as pure electric vehicle, hybrid vehicle etc.However many advantages, but the electric vehicle lithium ion battery explosion accident on fire that takes place frequently makes people strengthen the worry of its fail safe, and when big multiplying power discharging, the problem that how to solve the battery heating is also very thorny.Can inventing out a kind of electrochemical energy storage device so, promptly to have the ultracapacitor power density big; Have the big characteristics of lithium ion battery energy density again? Therefore the present invention realizes that from combining the angle of the two advantage a kind of high-power cathode of lithium that contains mixes asymmetric condenser plate and method for production thereof.
The CNT that adds in the anodal in addition system is a kind of hollow tube, specific area is big, degree of crystallinity is high, good conductivity with and micropore all concentrate within the specific limits, be a kind of desirable conductive electrode material.Wherein the outermost electronics of carbon atom passes through SP
2Hydridization and three adjacent carbon atoms form stable plane covalent bond, are in the big π key that electronics on the vertical direction Z axle has then formed delocalization.Therefore have the electronics that can move freely in a large number at the CNT tube wall, and these electron distributions are at the tube wall surface of CNT, so CNT has the excellent conductivity of leading.And carbon nano-fiber is a kind of carbon fiber with nanoscale, has outside low-density, high ratio modulus, high specific strength, the high conduction performance, has also that defects count is few, specific area is big and advantage such as compact structure.
A key factor of known decision ultracapacitor internal resistance be exactly electrode active material with metal collector between contact, whether the distribution of conductive materials between the electrode active material even.If in the ultracapacitor pole piece, introduce CNT and/or carbon nano-fiber, under a spot of condition of adding, just can obviously improve the conductivity of pole piece, thereby further improve the high-power charge-discharge performance of ultracapacitor.
Summary of the invention
The purpose of this invention is to provide a kind of asymmetric flexible packed super-capacitor of mixing high-power, negative pole embedding lithium of making.Wherein mix and be meant the positive electrode LiCoO that contains lithium ion battery in the positive electrode
2And negative material is AC and/or graphite; Like this when the asymmetric ultracapacitor of mixing fills inferior charging; Lithium ion in the positive electrode just can be embedded in the negative material, and the potential drop of negative material has been widened the operation potential window that mixes asymmetric ultracapacitor to 0.21V (VS.Li/Li+).
At first be coated with the certain thickness conducting resinl of one deck at the wire netting collection liquid surface, and then coating layer of active carbon, coating one deck anode material for lithium-ion batteries LiCoO on positive electrode at last
2And the negative active core-shell material that mixes asymmetric ultracapacitor is selected AC and/graphite for use; When mixing asymmetric ultracapacitor and carry out initial charge; Lithium ion is embedded in the negative pole; The potential drop of negative material has been widened the operation potential window that mixes asymmetric ultracapacitor to 0.21V (VS.Li/Li+).Through after in electrode material, adding small amount of carbon nanotubes and/or carbon nano-fiber, can significantly improve the high-power charge-discharge performance of ultracapacitor then.After using flexible package that ultracapacitor is encapsulated, can significantly reduce the quality of monomer ultracapacitor, thereby can under the prerequisite that does not change the ultracapacitor static capacity, can improve the energy density of ultracapacitor.
The objective of the invention is to realize like this:
Use wire netting to be electrode current collecting body; Add a kind of strong alkalinity anion surfactant; Use ultrasonic technology that collection liquid surface is carried out abatement processes 1-5min; Clean the back with secondary deionized water it is carried out 80 vacuumize 10min, and then use a kind of fluorine-containing surfactant that collector is carried out finishing 3-5min, just can obtain the substrate material that a certain type of organo-functional group is rich on surface no-pollution and surface.Wherein the perforate mode of wire netting can be corrosion perforate, punching press perforate, laser beam drilling; Perhaps use braiding silk screen, oblique wire drawing net.The material of the used wire netting of electrode can be aluminium, copper, stainless steel or nickel plating stainless steel.The thickness of wire netting is between 0.02mm-0.1mm.The shape of metal mesh opening can be irregularly shaped for circle, rhombus, rectangle or other.The surfactant that scrubbing is used is alkaline anion surfactant.Coating material uses fluorine-containing surfactant; Comprising anion surfactant, cationic surfactant, non-ionic surface active agent and special surface activating agent.Ultrasonic wave dirty handle (1-5min) that dispel, ultrasonic surface is modified (1-5min).Used frequency of ultrasonic is 40KHZ, and decentralized medium is the quartzy Asia deionized water that boils, and jitter time is 18-30min, and temperature is 40-55 ℃.
After wire netting handled, begin once to be coated with, just earlier conducting resinl is coated the surface of wire netting, the single face wet-film thickness of conducting resinl is about 15.It is the EB-815 or the EB-012 of Main Ingredients and Appearance that conducting resinl can be selected with the electrically conductive graphite.After treating the conducting resinl drying, carry out the secondary coating, scribbling coating AC single face wet-film thickness 185 μ m on the substrate of conducting resinl.Be coated with for the third time at last, scribbling the pole piece coating anode material for lithium-ion batteries LiCoO of conducting resinl/AC
2, the single face wet coating thickness is 10 μ m.
When the preparation electrode active material slurry, add surfactant, ultrasonic Treatment (1-3min) earlier; After adding adhesive again; Ultrasonic Treatment (3-5min) adds CNT and/or carbon nano-fiber again, and CNT and/or carbon nano-fiber account for the 1%-2% of solid content; Ultrasonic Treatment 3-5min adds active carbon ultrasonic Treatment 1-5min at last.
Active material slurry with method for preparing prepares ultracapacitor pole piece, 1MLiPF
6Electrolyte (EC/DEC=1:1), PP or PE are barrier film, use the aluminum plastic film flexible package to seal.Core is anodal ︱ barrier film ︱ negative pole laminated structure, on the charge-discharge test appearance, carries out 2.0-3.8V loop test, charging current 50A.The experiment proof prepares the high-power charge-discharge performance that electrode of super capacitor can significantly improve ultracapacitor through method of the present invention; Improved the energy density of mixing asymmetric ultracapacitor; Widen the operation potential window that mixes asymmetric ultracapacitor, improved the energy density of mixing asymmetric ultracapacitor.
The present invention has compared with prior art significantly improved the high-power charge-discharge performance that mixes asymmetric ultracapacitor, has improved the energy density of mixing asymmetric ultracapacitor, has widened the operating voltage window that mixes asymmetric ultracapacitor.Its principle is: use the strong alkalinity anion surfactant, not only can dispel the pollutant of collection liquid surface, can also play roughened is carried out on the surface of collector, to increase the contact area of itself and active material.Next conducting resinl is coated the surface of metal mesh opening collector, conducting resinl is riddled in the hole of metal mesh opening collector, therefore a very short time through indirect increase electrode active material and metal collector touches area, has increased the approach of electrical conductivity.Because the anode material for lithium-ion batteries LiCoO when being coated with for the third time
2Introducing; The asymmetric capacitor of mixing can be embedded into lithium ion in the negative material when initial charge; Thereby the potential drop that can make negative material is to 0.21V (VS.Li/Li+); Widened the operation potential window that mixes asymmetric ultracapacitor, known E=1/2CV by ultracapacitor energy computing formula
2, potential window widen the raising that just means maximum system energy.CNT of introducing in the system in addition and/or carbon nano-fiber have improved the electronic conductivity of integral material to a great extent, thereby make the prepared ultracapacitor of the present invention have high-power charge-discharge performance.Because CNT and/or carbon nano-fiber are not easy to be scattered in uniformly in the slurry; Therefore used ultrasonic wave to disperse; The mixing of using ultrasonic wave to carry out material has not only significantly been shortened the time of mixing of materials with dispersion, but also can make the mixture homogeneity of material in the shortest time, reach best.
Description of drawings
Fig. 1 ultracapacitor external form sketch map
Fig. 2 wire netting collector of the present invention sketch map
Fig. 3 pole piece structural representation of the present invention
Fig. 4 lamination type electric core structural representation of the present invention
Among Fig. 11 is positive pole ear, and 2 is negative lug.Among Fig. 31 is the metal forming lug, and Fig. 2 is an active material layer.
Four case study on implementation 1:
Getting the breadth width is that 300mm, thickness are the collector of the metallic aluminium net of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.Then the metallic aluminium net is done following processing; Add a kind of strong alkalinity anion surfactant; Use ultrasonic technology that collection liquid surface is carried out abatement processes 1.5min; Clean the back with secondary deionized water it is carried out 80 ° of C vacuumize 10min, and then use fluorine-containing surfactant that collector is carried out finishing 4min.
Once be coated with conducting resinl, the wire netting of handling well is coated with conducting resinl, conducting resinl single face wet-film thickness is 15 μ m.
Secondary coating active carbon; When the preparation electrode active material slurry, at first in the 150ml absolute ethyl alcohol, add CNT 8g, utilize ultrasonic wave to disperse; And then take by weighing 20g polyvinylidene fluoride PVDF and be dissolved in the 200g N-methyl pyrrolidone (NMP); Stirring is fully dissolved it, carries out ultrasonic Treatment 3min then, and then takes by weighing the 20gSuper-P conductive carbon black; Take by weighing the 200g active carbon and in stirring ball mill, fully carry out the ball milling stirring as electrode active material; Mixture with conductive black behind the above-mentioned stirring ball-milling and active carbon joins in the CNT of ultrasonic dispersing again, said mixture is joined among the NMP of PVDF again, then this slurry is transferred in the homogenizer; Stirred 1.5 hours with 3200 rev/mins rotating speeds, add the 500gNMP dilution again and obtain the liquid slurry that viscosity is 6000pas.And then slurry carried out ultrasonic Treatment 15min.It is online to use the transfer type coating machine that this slurry is coated on above-mentioned aluminium uniformly, and coating single face thickness is 200 μ m.
Three coating lithium electricity positive electrode LiCoO
2, the process and method of preparation slurry is identical with process two, just in preparation lithium electricity positive electrode process, need not add any conductive agent.
To carry out 120 ° of C vacuumizes 8 hours through the pole piece after three coatings at last, and use twin rollers that pole piece is depressed into 150 μ m then, obtain the ultracapacitor positive pole, the die-cut pole piece of processing length * wide=120mm * 55mm.
With the above-mentioned positive/negative plate that is complementary, be barrier film with U.S. celgard 2400, fold by the top-down order of anodal ︱ barrier film ︱ negative pole ︱ septum electrode, obtain stacked core body.Use flexible package that core body is encapsulated.In the glove box that is full of Ar gas of drying, to the housing that electric core is housed, inject an amount of 1MLiPF from liquid injection port
6Electrolyte (EC/DEC=1:1).Sealing the back is taken out by glove box.
10A discharges and recharges, and voltage-operated window is 2.0V-3.8V, and the internal resistance of ultracapacitor is 0.65m Ω, and static capacity is 2200F.
Case study on implementation 2:
Change the CNT in the case study on implementation 1 into carbon nano-fiber.Slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.10A discharges and recharges, and voltage-operated window is 2.0V-3.8V, and the internal resistance of ultracapacitor is 0.55m Ω, and static capacity is 2100F.
Case study on implementation 3:
Change the CNT in the case study on implementation 1 mixture of Nano carbon fibers peacekeeping CNT into, and the quality summation of the two is constant.Slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 0.49m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2100F.
Contrast case 1:
Getting the breadth width is that 300mm, thickness are the collector of the metallic aluminium net of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.In this Comparative Examples, metallic aluminium net collector is not handled, slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.
10A discharges and recharges, and voltage-operated window is 2.0V-3.8V, and the internal resistance of ultracapacitor is 1.48m Ω, and static capacity is 2200 F.
Contrast case 2:
Change the CNT in the contrast case 1 into carbon nano-fiber.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and voltage-operated window is 2.0V-3.8V, and the internal resistance of ultracapacitor is 1.36m Ω, and static capacity is 2100F.
Contrast case 3:
Change the CNT of contrast in the case 1 mixture of carbon nano-fiber and CNT into, and the quality summation of the two is constant.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 1.41m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2200F.
Contrast case 4:
Getting the breadth width is that 300mm, thickness are the collector of the atresia metal aluminum foil of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.The processing method of atresia metal aluminum foil collector, slurry are mixed, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.
10A discharges and recharges, and the internal resistance of ultracapacitor is 1.56m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2000 F.
Contrast case 5:
Change the CNT in the contrast case 4 into carbon nano-fiber.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 1.47m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1950F.
Contrast case 6:
Change the CNT of contrast in the case 4 mixture of carbon nano-fiber and CNT into, and the quality summation of the two is constant.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 1.43m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2000F.
Contrast case 7:
Getting the breadth width is that 300mm, thickness are the collector of the atresia metal aluminum foil of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.In this Comparative Examples, metallic aluminium net collector is not handled, slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.
10A discharges and recharges, and the internal resistance of ultracapacitor is 2.42m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2000 F.
Contrast case 8:
Change the CNT in the contrast case 7 into carbon nano-fiber.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.31m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2000F.
Contrast case 9:
Change the CNT of contrast in the case 7 mixture of carbon nano-fiber and CNT into, and the quality summation of the two is constant.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.26m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 2000F.
Contrast case 10:
Getting the breadth width is that 300mm, thickness are the collector of the atresia metal aluminum foil of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.In this Comparative Examples, metallic aluminium net collector is not handled, pole piece is only carried out the secondary coating, that is to say does not have anode material for lithium-ion batteries LiCoO in the positive electrode in this contrast case
2, slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.
10A discharges and recharges, and the internal resistance of ultracapacitor is 2.67m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1200F.
Contrast case 11:
Change the CNT in the contrast case 10 into carbon nano-fiber.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.52m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1150F.
Contrast case 12:
Change the CNT of contrast in the case 10 mixture of carbon nano-fiber and CNT into, and the quality summation of the two is constant.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.61m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1300F.
Contrast case 13:
Getting the breadth width is that 300mm, thickness are the collector of the atresia metal aluminum foil of 0.1mm as electrode active material, and wherein the mesh areas width is 260mm, and the 20mm imperforate section is respectively reserved on both sides.In this Comparative Examples, metallic aluminium net collector is handled, pole piece is only carried out the secondary coating, that is to say does not have anode material for lithium-ion batteries LiCoO in the positive electrode in this contrast case
2, the processing method of atresia metal forming, slurry are mixed, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.
10A discharges and recharges, and the internal resistance of ultracapacitor is 2.21m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1200F.
Contrast case 14:
Change the CNT in the contrast case 13 into carbon nano-fiber.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.15m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1200F.
Contrast case 15:
Change the CNT of contrast in the case 13 mixture of carbon nano-fiber and CNT into, and the quality summation of the two is constant.The assembling of slurry mixing, pole piece making and battery is with test condition and contrast in the case 1 consistent.10A discharges and recharges, and the internal resistance of ultracapacitor is 2.20m Ω, and voltage-operated window is 2.0V-3.8V, and static capacity is 1250F.
Contrast case 4:
Positive electrode in the case study on implementation 1 is only carried out the secondary coating, that is to say not add lithium electricity positive electrode LiCoO in the anodal system
2, slurry mixes, pole piece is made and the assembling of battery and test condition and case study on implementation 1 in consistent.10A discharges and recharges, and voltage-operated window is 2.0V-3.8V, and the internal resistance of ultracapacitor is 0.42m Ω, and static capacity is 1700F.
Claims (19)
1. a high-power embedding cathode of lithium mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof; It is characterized in that: the used collector of ultracapacitor pole piece is a wire netting; At first use coating machine on the net collector, to apply one deck conducting resinl; Again with the pole piece coating layer of active carbon of coating machine, be coated with one deck LiCoO at last after the drying to the surface coverage conducting resinl
2, negative material is selected AC and/or graphite.
2. a high-power embedding cathode of lithium mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: added carbon nano-fiber, SWCN and multi-walled carbon nano-tubes in the process of preparation ultracapacitor active material slurry.
3. a high-power embedding cathode of lithium mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: use ultrasonic wave that CNT and/or carbon nano-fiber are disperseed, optimize material interpolation order.
4. a high-power embedding cathode of lithium mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: flexible package is adopted in the shell encapsulation of ultracapacitor.
5. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the perforate mode of wire netting can be corrosion perforate, punching press perforate, laser beam drilling; Perhaps use braiding silk screen, oblique wire drawing net.
6. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the material of the used wire netting of electrode can be aluminium, copper, stainless steel or nickel plating stainless steel.
7. mix asymmetric ultracapacitor pole piece and manufacturing approach thereof according to claim 1 high-power embedding cathode of lithium, it is characterized in that: the thickness of wire netting is between 0.02mm-0.1mm.
8. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the shape of metal mesh opening can be irregularly shaped for circle, rhombus, rectangle or other.
9. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: think in the conducting resinl that electrically conductive graphite is the EB-815 or the EB-012 of Main Ingredients and Appearance.
10. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the single face wet-film thickness of conducting resinl is 15 μ m.
11. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the single face wet-film thickness of active carbon is 185 μ m.
12. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: be coated with LiCoO for the third time
2The time, the LiCoO of preparation
2Do not add any conductive agent in the slurry.
13. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: LiCoO
2The single face wet-film thickness be 10 μ m.
14. a kind of high-power embedding cathode of lithium according to claim 1 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the ratio of AC and graphite is 4: 1 in the negative active core-shell material.
15. a kind of high-power embedding cathode of lithium according to claim 2 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the diameter 50nm-200nm of carbon nano-fiber.
The caliber 2nm-20nm of SWCN and multi-walled carbon nano-tubes.
16. a kind of high-power embedding cathode of lithium according to claim 2 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: CNT and/or carbon nano-fiber account for the 1%-2% of solid content.
17. a kind of high-power embedding cathode of lithium according to claim 3 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof; It is characterized in that: used frequency of ultrasonic is 40KHZ; Decentralized medium is the quartzy Asia deionized water that boils, and jitter time is 1-30min, and temperature is 40-55 ℃.
18. a kind of high-power embedding cathode of lithium according to claim 3 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the interpolation of each material is followed successively by in proper order, adhesive, conductive agent (CNT and/or carbon nano-fiber) and active carbon.
19. a kind of high-power embedding cathode of lithium according to claim 4 mixes asymmetric ultracapacitor pole piece and manufacturing approach thereof, it is characterized in that: the thickness of flexible package aluminum plastic film is 0.153mm.
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| CN104409224A (en) * | 2013-11-28 | 2015-03-11 | 东莞市长安东阳光铝业研发有限公司 | Cathode plate for lithium-ion capacitor and production method of cathode plate |
| CN106783205A (en) * | 2016-12-15 | 2017-05-31 | 宁波中车新能源科技有限公司 | A kind of big multiplying power high-power battery electric capacity cathode pole piece and preparation method thereof |
| CN106783205B (en) * | 2016-12-15 | 2019-07-26 | 宁波中车新能源科技有限公司 | A kind of big multiplying power high-power battery capacitor cathode pole piece and preparation method thereof |
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