CN102683034A - Method for preparing super capacitor electrode plate - Google Patents
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- CN102683034A CN102683034A CN2012101349472A CN201210134947A CN102683034A CN 102683034 A CN102683034 A CN 102683034A CN 2012101349472 A CN2012101349472 A CN 2012101349472A CN 201210134947 A CN201210134947 A CN 201210134947A CN 102683034 A CN102683034 A CN 102683034A
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- Y02E60/13—Energy storage using capacitors
Abstract
The invention provides a method for preparing a super capacitor electrode plate. The method comprises the following steps of: 1) dispersing a carbon substrate active material and a carbon substrate conductive agent for 5-60 minutes by first dispersion equipment to obtain a mixture A; 2) preparing an aqueous binder into an aqueous colloidal solution B with a mass concentration of 1-8%; 3) dispersing the mixture A and the aqueous colloidal solution B for 20-240 minutes by second dispersion equipment to obtain slurry C; and 4) coating the slurry C on a current collector, drying, trimming and rolling to prepare the electrode plate.
Description
Technical field
The present invention relates to a kind of preparation method of super capacitor electrode slice.
Background technology
Ultracapacitor is also claimed electrochemical capacitor; Be a kind of novel energy-storage travelling wave tube, have the big and high advantage of chemical power source energy density of power density of conventional capacitor concurrently, but fast charging and discharging; Long service life all has broad application prospects in fields such as electronics, electric power and automobiles.
The preparation method of electrode slice has two kinds: a kind of is that active material, conductive agent and binding agent are mixed, and processes mould and overlays on the collector, tailors into electrode slice after the drying; Another kind is that active material, conductive agent and binding agent are mixed, and is coated on the collector through the mode that is coated with, and tailors into electrode slice after the drying.Also will be in order to reduce resistance with prepared electrode slice roll-in to suitable thickness.Electrode slice through lamination or be wound into electric core and put into the ultracapacitor shell, is sealed after adding electrolyte solution, process ultracapacitor.
For coating process, the common way that adopts is earlier binding agent to be dissolved in the solvent and to dilute obtaining sol solution, obtains slurry with mixing in conductive agent and the active material adding sol solution then.This technology is widely used in the preparation of electrode slice of lithium ion battery; But preparation for the electrode slice of ultracapacitor; Especially adopt the electrode slice of aqueous binders and carbon-based material, because the specific area of carbon back active material and carbon-based conductive agent is generally all bigger, and the surface of carbon-based conductive agent is the oleophilic drainage type; Therefore carbon-based conductive agent is difficult to disperse in aqueous colloidal solution; Time that will spend reach 6～7 hours or the time longer, limited production efficiency, and the dispersion effect of carbon-based conductive agent is also bad.
Summary of the invention
The objective of the invention is to overcome that carbon-based conductive agent is difficult to disperse the shortcoming long with jitter time in the existing aqueous binders system coating process, provide a kind of and evenly disperse carbon-based conductive agent to obtain slurry at short notice, prepare the method for pole piece.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of preparation method of super capacitor electrode slice comprises following steps:
1) use first dispersing apparatus that active material and carbon-based conductive agent are disperseed to obtain in 5～60 minutes mixture A;
2) aqueous binders being mixed with mass concentration is 1%～8% aqueous colloidal solution B;
3) use second dispersing apparatus that mixture A and aqueous colloidal solution B are disperseed to obtain in 20～240 minutes slurry C;
4) slurry C is coated onto on the collector, dry after cut with roll-in after process electrode slice;
Described first dispersing apparatus can be the equipment that can be used for disperseing powder arbitrarily, includes, but are not limited to mixer, ball mill, mixer.
Described second dispersing apparatus is selected from a kind of in ball mill, mixer, ultrasonic dispersion machine, mulser, colloid mill, the grinder.
Described active material is the carbon back active material.
Perhaps, described active material is inserted the embedding material by mass ratio 50～95 by carbon back active material and lithium ion: 5～50 form.
Said carbon back active material is selected from one or more in active carbon, mesoporous charcoal, active charcoal fiber, carbon aerogels, the graphene oxide; Described lithium ion is inserted the embedding material and is selected from natural flake graphite, natural micro crystal graphite, Delanium, carbonaceous mesophase spherules, LiFePO
4, LiMn
2O
4, LiCoO
2, LiNiO
2, LiCo
1/3Ni
1/3Mn
1/3O
2, Li
4Ti
5O
12In one or more.
Described aqueous binders can be polytetrafluoroethylene or butadiene-styrene rubber, and wherein butadiene-styrene rubber generally makes up together as binding agent with sodium carboxymethylcellulose and uses, and sodium carboxymethylcellulose can play thickening and the effect of regulating viscosity.Also can be the binding agent of other kinds, such as the LA type aqueous binders of the happy company in mattress ground, Chengdu.Aqueous binders is obtained aqueous colloidal solution with distilled water or deionized water dissolving or after diluting.
Described carbon-based conductive agent includes but not limited to conductive black, electrically conductive graphite, CNT, nano carbon fiber and Graphene, and above-mentioned carbon-based conductive agent can be used separately, also can mix use by different materials.
The mass ratio of carbon back active material, carbon-based conductive agent, aqueous binders is 60～94: 3～20: 3～20.
Described collector can be selected aluminium foil, nickel foil or Copper Foil for use.
As more excellent embodiment, in step 1) or step 2) or step 3) in add surfactant, the quality of described surfactant accounts for 0.05%～1% of solid gross mass contained in the slurry.The gross mass of other composition beyond described " in the slurry contained solid gross mass " is meant and desolventizes in the slurry.Described surfactant can be one or more in dodecyl sodium sulfate, lauryl sodium sulfate, the neopelex; Can be polyacrylate, like in Sodium Polyacrylate, polyacrylic acid potassium, Lithium polyacrylate, the ammonium polyacrylate one or more; Also can be the hydrophilic acrylate's copolymer that contains sulfonic group scion grafting unit, especially, contain in the hydrophilic methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate of sulfonic group scion grafting unit one or more.Surfactant can improve surface infiltration performance and the dispersion effect of carbon-based conductive agent in aqueous colloidal solution, thereby reduces the resistance of electrode slice.In one embodiment, add the aqueous solution that mass concentration is 2%～40% surfactant in step 1); In one embodiment, in step 2) in surfactant is mixed with aqueous colloidal solution B with aqueous binders; In another kind of embodiment, the mixture A, the step 2 that in step 3), surfactant are obtained with step 1)) the aqueous colloidal solution B that obtains joins in second dispersing apparatus and disperses.
The drying of the electrode slice of ultracapacitor can be divided into two processes; The one, coating finishes the disposed slurry drying and sticks to the process on the collector; Can place aeration cabinet drying under 80～150 ℃ temperature to get final product in 10～15 minutes; If dispose aeration cabinet on the coating machine, this step can be ignored; After this to place vacuum drying chamber under 80～120 ℃ temperature dry 4～48 hours, fully remove the carbon back active material micropore and mesoporous in traces of moisture.The purpose of electrode slice roll process is to make closely contact between active material, conductive agent and the collector, thereby reduces the contact resistance of electrode slice and the equivalent series resistance of ultracapacitor.
Description of drawings
Shown in Figure 1 is the electron scanning micrograph of the super capacitor electrode slice of embodiment 5.
Shown in Figure 2 is the electron scanning micrograph of the super capacitor electrode slice of Comparative Examples.
Shown in Figure 3 is the electron scanning micrograph of the super capacitor electrode slice of embodiment 9.
Embodiment
The nano carbon fiber of the electrically conductive graphite of the conductive black of the active carbon of 200 mass parts and 15 mass parts, 5 mass parts, 5 mass parts added to mix in the mixer obtained mixture A in 10 minutes; With the solid content of 42 mass parts is that the sodium carboxymethylcellulose of 60% butadiene-styrene rubber and 25 mass parts is dissolved in the deionized water of 560 mass parts and obtains aqueous colloidal solution B; With mixture A with the ultrasonic dispersion of solution B 120 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 2
The multiple-wall carbon nanotube of the conductive black of the active carbon of 200 mass parts, 10 mass parts and 2 mass parts added to mix in the ball mill obtained mixture A in 5 minutes; With the solid content of 80 mass parts is that 15% LA133 aqueous binders is dissolved in the deionized water of 800 mass parts and obtains aqueous colloidal solution B; Mixture A and aqueous colloidal solution B were disperseed 20 minutes with mulser; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 3
The active carbon of 200 mass parts and the conductive black of 6.5 mass parts were added stirrer for mixing 5 minutes; Obtain mixture A; With the solid content of 43 mass parts is that 15% LA133 aqueous binders is dissolved in the deionized water of 600 mass parts; The aqueous colloidal solution B that obtains and mixture A with disperseing 120 minutes in the mixer, are coated the slurry C that obtains on the nickel foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 4
The conductive black of the Graphene of the active carbon of 180 mass parts, 10 mass parts and 50 mass parts added in the ball mill mixed 60 minutes; Obtain mixture A; With the solid content of 320 mass parts is that to be 60% polytetrafluoroethylene aqueous emulsion obtain aqueous colloidal solution B with the deionized water dilution of 800 mass parts for the solid content of 15% LA133 aqueous binders and 20 mass parts; With mixture A with aqueous colloidal solution B ball milling 240 minutes; The slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
The conductive black of the active carbon of 200 mass parts and 30 mass parts added in the ball mill mixed 30 minutes; Obtain mixture A; With the solid content of 300 mass parts is that 15% LA135 aqueous binders is dissolved in the deionized water of 900 mass parts; To obtain aqueous colloidal solution B with mixture A ball milling 180 minutes, the slurry C that obtains will be coated on the aluminium foil, and cut, obtain super capacitor electrode slice after the roll-in.
Comparative Examples
With the solid content of 300 mass parts is that 15% LA135 aqueous binders is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution; The active carbon of 200 mass parts and the conductive black and the aqueous colloidal solution of 30 mass parts were added stirrer for mixing 420 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 6
The conductive black of the active carbon of 200 mass parts and 30 mass parts added in the ball mill mixed 30 minutes; Obtain mixture A; With the solid content of 300 mass parts is that the neopelex of lauryl sodium sulfate, 1 mass parts of 15% LA135 aqueous binders and 1.75 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Aqueous colloidal solution B was put into basket grinding machine for grinding 45 minutes with mixture A; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
The conductive black of the active carbon of 200 mass parts and 30 mass parts added in the ball mill mixed 30 minutes; Obtain mixture A; With the solid content of 300 mass parts is that the neopelex of 15% LA135 aqueous binders and 0.15 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Aqueous colloidal solution B with mixture A ball milling 120 minutes, is coated the slurry C that obtains on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 8
The conductive black of the active carbon of 200 mass parts and 30 mass parts added in the ball mill mixed 30 minutes; Obtain mixture A; With the solid content of 300 mass parts is that the dodecyl sodium sulfate of 15% LA135 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Aqueous colloidal solution B with mixture A ball milling 120 minutes, is coated the slurry C that obtains on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 9
The conductive black of the active carbon of 200 mass parts and 30 mass parts added in the ball mill mixed 30 minutes; Obtain mixture A; With the solid content of 300 mass parts is that the Sodium Polyacrylate of 15% LA135 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Aqueous colloidal solution B with mixture A ball milling 120 minutes, is coated the slurry C that obtains on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 10
With the active carbon of 200 mass parts, the conductive black of 30 mass parts and the solid content of 6 mass parts is to mix in the 10% polyacrylic acid sodium water solution adding ball mill to obtain mixture A in 30 minutes; With the solid content of 300 mass parts is that 15% LA135 aqueous binders is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Mixture A and aqueous colloidal solution B were mixed in ball mill 120 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 11
The conductive black of the active carbon of 200 mass parts and 30 mass parts added to mix in the ball mill obtained mixture A in 20 minutes; With the solid content of 300 mass parts is that the methyl acrylate copolymer that contains sulfonic group scion grafting unit of 15% LA135 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
The conductive black of the carbon aerogels of the charcoal fiber of the activity of the active carbon of 100 mass parts, 50 mass parts, 50 mass parts and 30 mass parts added to mix in the ball mill obtained mixture A in 60 minutes; With the solid content of 300 mass parts is that the deionized water that 15% LA133 aqueous binders is dissolved in 900 mass parts obtains aqueous colloidal solution B; With the mass concentration of 6 mass parts is 10% surfactant, aqueous colloidal solution B, mixture A ball milling 90 minutes together; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.Wherein surfactant is that 1: 1: 1 polyacrylic acid potassium, Lithium polyacrylate, ammonium polyacrylate formed by mass ratio.
Embodiment 13
With the active carbon of 190 mass parts, the LiFePO of 10 mass parts
4, 20 mass parts the mass concentration of electrically conductive graphite and 30 mass parts of conductive black, 10 mass parts be that 10% the ethyl acrylate copolymer aqueous solution that contains sulfonic group scion grafting unit adds to mix in the ball mill and obtained mixture A in 10 minutes; With the solid content of 300 mass parts is that 15% LA133 aqueous binders is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
With the active carbon of 100 mass parts, the LiMn of 100 mass parts
2O
4, 30 mass parts the mass concentration of conductive black and 1.5 mass parts be that 10% the propyl acrylate aqueous copolymers solution that contains sulfonic group scion grafting unit adds to mix in the ball mill and obtained mixture A in 20 minutes; With the solid content of 25 mass parts is that the sodium carboxymethylcellulose of 60% butadiene-styrene rubber and 10 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; Aqueous colloidal solution B, mixture A were mixed in colloid mill 30 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 15
The conductive black of the natural flake graphite of the graphene oxide of the active carbon of 100 mass parts, 20 mass parts, 80 mass parts and 30 mass parts added to mix in the ball mill obtained mixture A in 20 minutes; With the solid content of 300 mass parts is that the surfactant of 15% LA133 aqueous binders and 1.38 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B, and wherein surfactant is that 1: 1 the hydrophily methyl acrylate that contains sulfonic group scion grafting unit, the hydrophily butyl acrylate copolymer that contains sulfonic group scion grafting unit are formed by mass ratio.Aqueous colloidal solution B poured into mixture A disperse 30 minutes in the colloid mill, the slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
With the active carbon of 140 mass parts, the Li of 60 mass parts
4Ti
5O
12Add to mix in the ball mill with the conductive black of 30 mass parts and obtained mixture A in 20 minutes; With the solid content of 300 mass parts is that the Lithium polyacrylate of 15% LA135 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 17
With the active carbon of 180 mass parts, the LiCo of 20 mass parts
1/3Ni
1/3Mn
1/3O
2Add with the conductive black of 30 mass parts and to mix 20 clocks in the ball mill and obtain mixture A; With the solid content of 200 mass parts is that the polyacrylic acid potassium of 15% LA135 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
With the active carbon of 160 mass parts, the LiCoO of 40 mass parts
2Add to mix in the ball mill with the conductive black of 30 mass parts and obtained mixture A in 20 minutes; With the solid content of 200 mass parts is that the ammonium polyacrylate of 15% LA133 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 19
With the active carbon of 120 mass parts, the LiNiO of 80 mass parts
2Add to mix in the ball mill with the conductive black of 30 mass parts and obtained mixture A in 20 minutes; With the solid content of 200 mass parts is that the butyl acrylate copolymer that contains sulfonic group scion grafting unit of 15% LA132 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the aluminium foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 20
The conductive black of the natural micro crystal graphite of the active carbon of 100 mass parts, 100 mass parts and 15 mass parts added to mix in the ball mill obtained mixture A in 20 minutes; With the solid content of 200 mass parts is that the Sodium Polyacrylate of 15% LA133 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 60 minutes; The slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
The conductive black of the Delanium of the active carbon of 120 mass parts, 80 mass parts and 30 mass parts added to mix in the ball mill obtained mixture A in 20 minutes; With the solid content of 200 mass parts is that the Sodium Polyacrylate of 15% LA133 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 60 minutes; The slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
The conductive black of the carbonaceous mesophase spherules of the active carbon of 120 mass parts, 80 mass parts and 30 mass parts added to mix in the ball mill obtained mixture A in 30 minutes; With the solid content of 200 mass parts is that the Sodium Polyacrylate of 15% LA133 aqueous binders and 0.60 mass parts is dissolved in the deionized water of 900 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
Embodiment 23
The conductive black of the Delanium of the carbonaceous mesophase spherules of the active carbon of 100 mass parts, 80 mass parts, 20 mass parts and 10 mass parts added to mix in the ball mill obtained mixture A in 20 minutes; With the solid content of 200 mass parts is that the Sodium Polyacrylate of 15% LA133 aqueous binders and 0.40 mass parts is dissolved in the deionized water of 800 mass parts and obtains aqueous colloidal solution B; With aqueous colloidal solution B with mixture A ball milling 90 minutes; The slurry C that obtains is coated on the Copper Foil, cut, obtain super capacitor electrode slice after the roll-in.
Shown in Figure 1 is the electron scanning micrograph of embodiment 5 electrode slices, and bulky grain is an active carbon, and granule is a conductive black, and it is comparatively even to see that active carbon and conductive black disperse.
Shown in Figure 2 is the electron scanning micrograph of Comparative Examples electrode slice, and bulky grain is an active carbon, and granule is a conductive black.The space is bigger between activated carbon granule, and conductive black still is aggregating state, and active carbon and conductive black dispersion effect are not good.
Shown in Figure 3 is the electron scanning micrograph of embodiment 9 electrode slices, and bulky grain is an active carbon, and granule is a conductive black.Active carbon and conductive black evenly disperse, and conductive black is coated on the activated carbon granule.
Adopt embodiment 5,8～11 and Comparative Examples pole piece to be assembled into the symmetric form ultracapacitor respectively.Specific practice is following: it is 14 millimeters super capacitor electrode slice that the electrode slice for preparing is washed into diameter; After the vacuumize; Press the order of lower house-electrode slice-polypropylene diaphragm-electrode slice-pad-spring leaf-upper shell, in the glove box of argon shield, earlier first electrode slice and polypropylene diaphragm are put into lower house, drip the acetonitrile solution of the tetraethyl ammonium tetrafluoroborate of 1 an amount of mol; Put second electrode slice then; Wherein the coated face that active material is arranged of first electrode slice and second electrode slice all contacts with polypropylene diaphragm, seals after putting pad, spring leaf and upper shell at last, is assembled into the button ultracapacitor.The data of the equivalent series resistance of the button ultracapacitor of test are as shown in the table:
| Sequence number | The pole piece that uses | The equivalent series resistance of |
| 1 | |
9.5 ohm |
| 2 | Comparative Examples | 20.4 ohm |
| 3 | Embodiment 8 | 6.2 ohm |
| 4 | Embodiment 9 | 4.7 ohm |
| 5 | Embodiment 10 | 3.0 ohm |
| 6 | Embodiment 11 | 4.0 ohm |
Comprehensive above embodiment and Comparative Examples can be found; Compare with the method that Comparative Examples is adopted; Adopt method disclosed by the invention to make that production efficiency significantly improves, dispersion effect obviously improves; And the electrode slice resistance of preparation is littler, and the resistance reduction behavior of adding surfactant rear electrode sheet is more remarkable.
Claims (10)
1. the preparation method of a super capacitor electrode slice is characterized in that described preparation method comprises following steps:
1) use first dispersing apparatus that active material and carbon-based conductive agent are disperseed to obtain in 5～60 minutes mixture A;
2) aqueous binders being mixed with mass concentration is 1%～8% aqueous colloidal solution B;
3) use second dispersing apparatus that described mixture A and aqueous colloidal solution B are disperseed to obtain in 20～240 minutes slurry C;
4) described slurry C is coated onto on the collector, dry after cut with roll-in after process electrode slice;
Described first dispersing apparatus is a kind of in mixer, ball mill, the mixer, and described second dispersing apparatus is a kind of in ball mill, mixer, ultrasonic dispersion machine, mulser, colloid mill, the grinder.
2. the preparation method of super capacitor electrode slice according to claim 1 is characterized in that described active material is the carbon back active material.
3. the preparation method of super capacitor electrode slice according to claim 1, it is characterized in that described active material inserts the embedding material by mass ratio 50～95 by carbon back active material and lithium ion: 5～50 form.
4. according to the preparation method of claim 2 or 3 described super capacitor electrode slices, it is characterized in that said carbon back active material is selected from one or more in the charcoal fiber of active carbon, mesoporous charcoal, activity, carbon aerogels, the graphene oxide; Described lithium ion is inserted the embedding material and is selected from natural flake graphite, natural micro crystal graphite, Delanium, carbonaceous mesophase spherules, LiFePO
4, LiMn
2O
4, LiCoO
2, LiNiO
2, LiCo
1/3Ni
1/3Mn
1/3O
2, Li
4Ti
5O
12In one or more.
5. the preparation method of super capacitor electrode slice according to claim 1 is characterized in that described carbon-based conductive agent is selected from one or more in conductive black, electrically conductive graphite, CNT, nano carbon fiber, the Graphene.
6. the preparation method of super capacitor electrode slice according to claim 1, the mass ratio that it is characterized in that described active material, carbon-based conductive agent, aqueous binders is 60～94: 3～20: 3～20.
7. the preparation method of super capacitor electrode slice according to claim 1; It is characterized in that in described step 1) or step 2) or step 3) in add surfactant, the quality of described surfactant accounts for 0.05%～1% of solid gross mass contained in the slurry.
8. the preparation method of super capacitor electrode slice according to claim 7 is characterized in that described surfactant is one or more in dodecyl sodium sulfate, lauryl sodium sulfate, the neopelex.
9. the preparation method of super capacitor electrode slice according to claim 7 is characterized in that described surfactant is a polyacrylate.
10. the preparation method of super capacitor electrode slice according to claim 7 is characterized in that described surfactant is the hydrophilic acrylate's copolymer that contains sulfonic group scion grafting unit.
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| CN111224062A (en) * | 2020-01-14 | 2020-06-02 | 广州鹏辉能源科技股份有限公司 | Electrode plate and manufacturing method thereof |
| CN113380556A (en) * | 2021-06-08 | 2021-09-10 | 福建师范大学泉港石化研究院 | Nano flaky conductive agent |
| CN114694898A (en) * | 2022-06-01 | 2022-07-01 | 西北工业大学 | Preparation method of MLCC nickel inner electrode slurry |
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