TW201904866A - Method for forming uniform carbon nanotube conductive paste and processing apparatus applied by the same wherein the conductive paste is provided with very stable physical properties and chemical properties - Google Patents

Abstract

Disclosed are a method for forming a uniform carbon nanotube conductive paste and a processing apparatus applied by the method. The method includes the following steps: applying a dispersant and NMP (N-methyl-2-pyrrolidone) to a planetary mixer, and performing a mixing and stirring operation; then adding a medium carbon nanotube to the planetary mixer, and continuously performing the mixing and stirring operation, wherein the medium carbon nanotube has a length of 5m to 10m and a diameter of 10 nm to 12 nm; then sequentially adding graphene and conductive carbon spheres (such as Super P) to the planetary agitator, so as to form a conductive paste; then feeding the conductive paste to a stirring and grinding mechanism, wherein the stirring and grinding mechanism includes another planetary mixer and a wet grinder connected in series with the another planetary mixer; pouring the conductive paste in the another planetary mixer and then circulating the conductive paste between the another planetary mixer and the wet grinder by a circulating conveyor mechanism. In this way, the medium carbon nanotube does not form an aggregate structure in the conductive paste so as to be effectively dispersed in the conductive paste, and the conductive paste as a whole forms a uniform structure, such that its physical properties and chemical properties may be very stable.

Description

 Method for forming uniform carbon nanotube conductive paste and applied process device  

The invention relates to the manufacture of a carbon nanotube conductive paste, in particular to a method for forming a uniform carbon nanotube conductive paste and a process device applied thereto.

The battery is mainly formed by placing a positive electrode and a negative electrode in an electrolyte. The positive electrode is a mixture of a plurality of positive electrode conductive units (positive electrode materials such as lithium cobalt oxide) dispersed in the slurry. In general, the positive conductive unit must be mixed with the conductive paste before it can be applied to the electrode sheets and assembled into a battery. Therefore, a plurality of positive electrode conductive units (positive electrode materials) are connected to each other through a conductive paste, and therefore the conductive paste must have conductivity or conductivity so that free electrons can migrate in different positive electrode conductive units. It is not necessary to consume too much energy due to internal resistance to achieve an effective conductive purpose. Therefore, it is necessary to adjust the conductivity of the slurry using a specific conductive material when manufacturing the slurry.

Since the development of the carbon nanotubes, humans have discovered that carbon nanotubes are extremely powerful materials, and they are also widely used in mechanical engineering, physical energy and biotechnology, achieving many practical purposes. A conductive paste using a carbon nanotube as a positive electrode has been known in the prior art.

In the prior art, a medium-sized carbon nanotube slurry is produced by using a single-length or diameter-diameter carbon nanotube. It is a single average value in length and diameter, and its length is more than 1~5μm carbon tube. The purity is also a major problem to be overcome. The positive electrode slurry made of short carbon nanotubes is theoretically less able to span more than one positive conductive unit like long carbon, so free electrons need to span more than one conductivity difference interface to make more energy due to resistance. It affects the internal resistance of the positive pole piece and reduces the battery performance.

In view of the above issues, the inventor of the present invention based on the long-term research and development of carbon nanotubes, the inventor's research and development team has the growth technology of carbon nanotubes, and has applied various technologies related to carbon nanotubes to touch panels. Biomedical materials and functional textiles, and these research and development results have also received corresponding patents or application patents, such as the patent CN1483668A. Within the scope of the known, carbon nanotubes have been used in combination with nanomaterials or carbon nanotubes of different physical properties in the positive conducting paste. Therefore, the inventor team applied the carbon nanotube slurry containing different forms of carbon nanotubes to the conductive paste of the positive electrode after understanding the advantages of the carbon nanotube material. However, there are still quite a few problems in the process of nanocarbon tube slurry that must be broken.

The main contribution of the inventors is to apply a long length of carbon nanotubes in the conductive paste. Generally, the carbon nanotubes themselves are high molecular polymers and the benzene rings on the carbon nanotubes have a van der Waals force, so they are aggregated into a mass structure and precipitated to the bottom of the solution to make the overall conductive paste. The conductivity cannot be exerted. Especially when the length of the carbon nanotube is longer and the diameter is smaller, the problem becomes more serious. Therefore, an effective method must be used to disperse the agglomerated carbon nanotubes and evenly distribute them throughout the conductive paste region to produce an effective effect.

Therefore, the present invention intends to propose a new method for forming a uniform carbon nanotube conductive paste and a processing device applied thereto to solve the above-mentioned prior art defects.

Therefore, the object of the present invention is to solve the above-mentioned problems in the prior art. In the present invention, a method for forming a uniform carbon nanotube conductive paste and a process device therefor are proposed, which are to apply a planetary agitator to a medium-sized nanometer. The carbon tube is mixed with a dispersant, a conductive carbon ball, and NMP to form a conductive paste. The revolving agitator in the planetary agitator is used for agitating the conductive slurry in a large path so that the conductive slurry forms a large area displacement inside the inner tub. The self-rotating agitator in the planetary agitator is used for partially stirring the conductive slurry, mainly by rotating the block body along its own axis, so as to be around the self-rotating agitator. The conductive paste forms a vortex. After the slurry is transferred from the planetary agitator to a wet mill, the grinding beads passing through the wet mill will strike the inner conductive slurry to fully dissipate the carbon nanotubes in the conductive slurry, and the original agglomeration The carbon nanotubes together will be broken up due to the impact of the grinding beads. And the planetary stirrer and the wet grinder repeatedly agitate and impact, on the one hand, the medium-sized carbon nanotubes do not form an aggregate structure, are effectively dispersed in the conductive paste, and the overall conductive paste is formed uniformly. Structure, so its physical properties and chemical properties can be fairly uniform.

In order to achieve the above object, a method for forming a uniform carbon nanotube conductive paste is provided, which comprises the following steps: the first process is a premixing process, and the steps include: Step A: dispersing agent and NMP (N- Methyl-2-pyrrolidone, N-methylpyrrolidone) is added to a first planetary agitator and mixed and stirred; wherein the NMP is used as a solvent; Step B: then the medium carbon nanotube is added The mixing and stirring operation is continued in the first planetary agitator; wherein the medium-sized carbon nanotube has a length between 5 μm and 10 μm and a diameter between 10 nm and 12 nm; and step C: then graphene ( Graphene) adding the first planetary agitator to continue the mixing and stirring operation; step D: then adding a conductive carbon ball (such as Super P) to the first planetary agitator to continue the mixing and stirring operation; The dispersing agent, the NMP, the medium-sized carbon nanotube, the graphene and the conductive carbon ball in the inner barrel of the first planetary agitator form a conductive paste; the second process is a grinding and agitating process, including the steps For: step E: feeding the conductive paste mixed and stirred in the first process to a stirring grinding mechanism, wherein the stirring grinding mechanism comprises a second planetary agitator and a wetness in series with the second planetary agitator a grinder; the conductive paste is first poured into the second planetary agitator, and the conductive slurry is circulated between the second planetary agitator and the wet grinder by a circulation conveying mechanism; the conductive paste The material flows back and forth between the second planetary agitator and the wet grinder.

In this case, a stirring and grinding mechanism for forming a uniform conductive carbon nanotube conductive slurry is proposed, in which a planetary agitator is connected in series with a wet grinder, wherein the conductive paste is firstly poured into the planetary agitator and then transferred by circulation. The mechanism circulates the conductive paste between the planetary agitator and the wet grinder; the conductive paste flows back and forth between the planetary agitator and the wet grinder, applying different agitation and impact In order to achieve the effect of sufficient dispersion of the carbon nanotubes in the electrically conductive paste; wherein the electrically conductive paste is first fed to the wet grinder after proper agitation of the second planetary agitator, due to the bead mill Rotating the agitator, the grinding bead in the wet grinder hits the inner conductive paste to fully dissipate the carbon nanotubes in the conductive paste, and the carbon nanotubes originally reunited together because The impact of the bead is broken up; the conductive paste must flow back and forth between the planetary agitator and the wet grinder, and different agitation and impact modes are applied to achieve the nanocarbon in the conductive paste. tube Fully dispersed effectiveness.

The features of the present invention and its advantages are further understood from the following description, and reference is made to the accompanying drawings.

1‧‧‧Agitating grinding mechanism

10‧‧‧ planetary mixer

11‧‧‧ inner barrel

12‧‧‧ outer barrel

20‧‧‧Rotary agitator

25‧‧‧Frame

30‧‧‧Rotary agitator

35‧‧‧ Turn the ball

40‧‧‧Wet grinder

41‧‧‧ grinding bucket

42‧‧‧Filter

50‧‧‧Bead mill mixer

60‧‧‧ grinding beads

70‧‧‧Circular transmission mechanism

100‧‧‧cooling water

101‧‧‧First planetary agitator

102‧‧‧Second planetary agitator

201‧‧‧ drive mechanism

202‧‧‧ drive mechanism

203‧‧‧ drive mechanism

251‧‧‧blade

351‧‧‧ hanging iron column

Figure 1 shows a schematic view of the planetary agitator of the present case.

Figure 2 shows a schematic view of the wet grinder of the present invention.

Figure 3 shows a schematic view of the agitating and grinding mechanism of the present invention.

Fig. 4 is a view showing the connection of the first planetary agitator, the second planetary agitator and the wet grinder of the present invention.

Figure 5 shows a flow chart of the method steps of the present case.

In view of the structural composition of the case, and the functions and advantages that can be produced, in conjunction with the drawings, a preferred embodiment of the present invention is described in detail below.

Referring to FIG. 1 to FIG. 4, a method for forming a uniform carbon nanotube conductive paste of the present invention and a processing device therefor are provided, comprising the following components: a planetary agitator 10, mainly for stirring and conducting electricity. The slurry allows the components in the conductive paste to be uniformly mixed. In particular, the carbon nanotubes can be thoroughly mixed with the dispersing agent without accumulating the carbon nanotubes into a massive structure.

As shown in FIG. 1, the planetary agitator 10 mainly comprises an inner tub 11 for placing the conductive paste and agitating the conductive paste.

An outer tub 12 is disposed to receive the inner tub 11 . The outer tub 12 and the inner tub 11 are disposed with cooling water 100 to cool the conductive paste inside the inner tub 11 , and the cooling water 100 can be externally connected to the circulating cooling system. (For well-known conventional techniques, the detailed structure is not described in detail) to achieve the effect of 100 cycles of cooling water and heat exchange.

a slewing agitator 20 disposed in the inner tub 11 and externally connected to the driving mechanism 201 for agitating the conductive slurry in a large path so that the conductive paste is inside The inside of the tub 11 forms a displacement of a large area. The revolving agitator 20 is an approximately U-shaped or V-shaped frame 25, and a plurality of blades 251 are disposed on the side of the frame 25. The agitating agitator 20 rotates along the axis of the frame 25 while agitating, causing the conductive paste to form a displacement of a larger path. Preferably, the volume swept out by the revolutionary agitator 20 exceeds one half of the volume of the inner tub 11.

A self-rotating agitator 30 is used for partially agitating the conductive paste, mainly by rotating the block body along its own axis, so that the conductive paste around the rotary agitator 30 Forming eddy currents. In the present case, the rotary agitator 30 is a ball 35 and is suspended by a suspension column 351 and driven by a drive mechanism 202. When rotated, the ball 35 rotates about the axis passing through its center of the ball to form a vortex to the conductive paste.

In the present case, the rotary agitator 30 may be provided with a plurality of rotating balls 35, and each of the rotating balls 35 is suspended by a suspension column 351, and the rotation directions of the respective rotating balls 35 may be the same or different. In the figure, two turning balls 35 are taken as an illustration.

The purpose of the rotation in this case is to cause the conductive paste to form a local eddy current, mainly to break up the agglomerated carbon nanotubes. The purpose of the revolution is to cause the conductive paste of the inner tub 11 to form a large displacement convection, so that the entire conductive paste can be uniformly distributed. Therefore, the conductive paste is fully fused by revolution and rotation.

A wet grinder 40, as shown in FIG. 2, comprises: a grinding barrel 41 in which the conductive paste is disposed.

A bead mill agitator 50 is disposed inside the grinding tub 41 for sufficiently agitating the conductive paste.

A plurality of grinding beads 60 are disposed inside the grinding drum 41. When the bead mill mixer 50 is agitated, the grinding beads 60 may impinge on the inner conductive paste to sufficiently fill the carbon nanotubes in the conductive paste. Breaking up, the carbon nanotubes that were originally reunited together will be broken up due to the impact of the grinding beads 60. Preferably, the size of the bead body 60 is between 0.5 mm and 1.3 mm, and the bead body 60 is made of zirconia.

A filter 42 is configured to filter the conductive paste in the grinding drum 41 to obtain a uniform conductive slurry for further transportation. In the present case, the filter 42 is disposed at the front end of the grinding tub 41, and the conductive paste is extruded through the filter 42 and then conveyed outward from one end of the grinding tub 41.

As shown in FIG. 3, in the present embodiment, the agitating and grinding mechanism 1 for forming a uniform carbon nanotube conductive paste is in which the planetary agitator 10 is connected in series to the wet grinder 40, and the conductive paste is first poured into the planet. The agitator 10 is then circulated by the circulation transfer mechanism 70 between the planetary agitator 10 and the wet grinder 40. Generally, the volume of the planetary agitator 10 is much larger than the volume of the wet grinder 40. The conductive paste must flow back and forth between the planetary agitator 10 and the wet grinder 40, applying different agitation and impact. The method is to achieve the effect of sufficient dispersion of the carbon nanotubes in the conductive paste. The circulation transfer mechanism 70 can be driven via a drive mechanism 203. The recirculating mechanism 70 is a generally well-known mechanism, so its details are not described herein, and the figures are only schematic.

As shown in FIG. 5, the method steps for forming a uniform carbon nanotube conductive paste in the present case are as follows:

The first process is a pre-mixing process: adding a dispersant and NMP (N-Methyl-2-pyrrolidone, N-methylpyrrolidone) to a first planetary agitator 101 (as shown in FIG. 4) and mixing And the agitating operation (step 801), the time is about 15 to 20 minutes. Among them, the NMP is used as a solvent. The structure of the first planetary agitator 101 is the same as that of the planetary agitator 10 described above.

The revolution frequency of the revolutionary agitator 20 of the first planetary agitator 101 is 40 rpm (rotation per minute), and the rotary agitator 30 of the first planetary agitator 101 is two rotating balls 35. The rotation frequency is 200 rpm, and the two balls 35 rotate in the same direction.

The medium carbon nanotube is then added to the first planetary agitator 101 to continue the mixing and agitation operation (step 802) for a period of about 30 to 60 minutes, wherein the revolution of the first planetary agitator 101 The revolving frequency of the agitator 20 is 40 rpm, and the autorotating agitator 30 of the first planetary agitator 101 is two rotating balls 35 having a rotation frequency of 1200 rpm, and the two rotating balls 35 are reversely rotated.

Graphene is then added to the first planetary agitator 101 to continue the mixing and agitation operation (step 803) for a period of about 30 to 60 minutes, wherein the revolution of the first planetary agitator 101 The revolving frequency of the agitator 20 is 40 rpm, and the autorotating agitator 30 of the first planetary agitator 101 is two rotating balls 35 having a rotation frequency of 800 rpm, and the two rotating balls 35 are reversely rotated.

A conductive carbon ball (e.g., Super P) is then added to the first planetary agitator 101 to continue the mixing and agitation operation for about 30 to 40 minutes. Therefore, the dispersant, the NMP, the medium-sized carbon nanotube, the graphene and the conductive carbon ball in the inner tub 11 of the first planetary agitator 101 form a conductive paste (step 804). The revolution frequency of the revolutionary agitator 20 of the first planetary agitator 101 is 40 rpm, and the rotation agitator 30 of the first planetary agitator 101 is two rotating balls 35, and the rotation frequency thereof is 600 rpm. The two balls 35 are reversely rotated.

The temperature at each step in the first process described above is between 20 and 30 °C.

Wherein the dispersant accounts for about 0.8% to 1.2% by weight of the entire conductive paste; the dispersant is mainly used to open the medium-sized carbon nanotubes without being aggregated, or even sinking to the end. And the medium-sized carbon nanotubes can be uniformly distributed in the conductive paste. The dispersant may comprise a polymeric dispersant and a low molecular dispersant. The ratio of the polymer dispersant to the low molecular dispersant is 7:3.

The polymer dispersant is, for example, PVP (Polyvinylpyrrolidone, polyvinylpyrrolidone). Among them, low molecular dispersants such as besylate, ammonium bromide and ketene (Triton X-100); the besylate can be any of the besylate salts; The ammonium salts may be, for example, CTAB (cetyltrimethylammonium bromide, cetyltrimethylammonium bromide). The ratio of PVP, besylate, ammonium bromide and ketene is 7:2:0.5:0.5.

Wherein the medium-sized carbon nanotubes account for about 1% to 5% by weight of the entire conductive paste; wherein the medium-sized carbon nanotubes have a length of between 5 μm and 10 μm, and the diameter is about 10 nm. Between 12nm.

Wherein the ratio of the graphene to the entire conductive paste is between about 0.2% and 1.2% by weight; the graphene comprises two types, one is graphene having a structure of two to four layers, which accounts for the whole The ratio of the conductive paste is greater than 0% by weight; the other is graphene having a structure of four to eight layers, which accounts for more than 0% by weight of the entire conductive paste, and the combination of the two accounts for the entire conductive paste. The ratio is between about 0.2% and 1.2% by weight.

The ratio of the conductive carbon sphere to the entire conductive paste is between about 0% and 1.5% by weight.

The second process is a grinding and agitating process, and the conductive slurry mixed and stirred in the first process is fed to a stirring and grinding mechanism 1 (as shown in FIG. 4), and the agitating and grinding mechanism 1 includes a second planetary stirring. The device 102 and the wet grinder 40 are connected in series. After the conductive paste is first poured into the second planetary agitator 102, the conductive slurry is circulated between the second planetary agitator 102 and the wet grinder 40 by a circulation transfer mechanism 70 (step 805). . The structure of the second planetary agitator 102 is the same as that of the planetary agitator 10 described above.

The conductive paste is first sent to the wet grinder 40 after being properly stirred by the second planetary agitator 102. Due to the rotation of the bead mill agitator 50, the bead body 60 may impinge on the internal conductive. The medium-sized carbon nanotubes in the conductive slurry are sufficiently dispersed by the slurry, and the carbon nanotubes originally agglomerated together are broken up due to the impact of the grinding beads 60, and after sufficient agitation and impact, the original The agglomerates formed by the agglomeration of the medium carbon nanotubes may have a diameter of less than 100 μm. The conductive paste must flow back and forth between the second planetary agitator 102 and the wet grinder 40, and different agitation and impact modes are applied to achieve the full dispersion effect of the carbon nanotubes in the conductive paste. .

In the present case, the bead mill agitator 50 has a rotational speed of 2000 to 3000 rpm. Operating temperature is less than 35 °C.

In this case, the above two processes can be applied to achieve the required uniformity.

The third process is a stock mixing process, after the conductive paste obtained above is taken out, the viscosity is measured to determine whether the conductive paste meets the required viscosity, and then packaged for sale as a commodity. The viscosity requirement is that the viscosity can reach 8000 to 12000 cps at 2 rpm (step 806).

In the present application, the medium-sized carbon nanotubes can be mixed with a dispersing agent, a conductive carbon ball and an NMP, and a revolving agitator in the planetary agitator is used for stirring the conductive slurry in a large path, so that The conductive paste forms a large area displacement inside the inner tub. The self-rotating agitator in the planetary agitator is used for partially stirring the conductive slurry, mainly by rotating the block body along its own axis, so as to be around the self-rotating agitator. The conductive paste forms a vortex. The grinding beads of the wet grinder collide with the inner conductive paste to fully dissipate the carbon nanotubes in the conductive paste, and the carbon nanotubes originally agglomerated together may be hit by the grinding beads. Was broken up.

After the planetary stirrer and the wet grinder are stirred back and forth, on the one hand, the medium-sized carbon nanotubes do not form an aggregate structure, are effectively dispersed in the conductive paste, and the conductive paste is uniformly formed as a whole. Structure, so its physical properties and chemical properties can be fairly uniform.

In summary, the humanized design of this case is quite in line with actual needs. The specific improvement of the existing defects is obviously a breakthrough improvement advantage compared with the prior art, and it has an improvement in efficacy and is not easy to achieve. The case has not been disclosed or disclosed in domestic and foreign literature and market, and has complied with the provisions of the Patent Law.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

Claims (21)

 A method for forming a uniform carbon nanotube conductive paste comprises the following steps: the first process is a premixing process, and the steps are: Step A: dispersing agent and NMP (N-Methyl-2-pyrrolidone, N- Methylpyrrolidone) is added to a first planetary agitator and mixed and stirred; wherein the NMP is used as a solvent; Step B: a medium carbon nanotube is then added to the first planetary agitator The mixing and stirring operation is continued; wherein the medium carbon nanotube has a length between 5 μm and 10 μm and a diameter between 10 nm and 12 nm; and step C: then graphene is added to the first planetary Mixing and stirring are continued in the agitator; Step D: then adding conductive carbon balls to the first planetary agitator to continue mixing and stirring; therefore, the inside of the inner barrel of the first planetary agitator The dispersing agent, the NMP, the medium-sized carbon nanotube, the graphene and the conductive carbon ball form a conductive paste; the second process is a grinding and agitating process, and the steps include: Step E: mixing the first process and Stirring The conductive paste is fed to a stirring grinding mechanism, wherein the agitating grinding mechanism comprises a second planetary agitator and a wet grinder in series with the second planetary agitator; the conductive paste is first poured into the first After the two planetary agitators, the conductive slurry is circulated between the second planetary agitator and the wet grinder by a circulating conveying mechanism; the conductive slurry is in the second planetary agitator and the wet type The grinder flows back and forth between the grinders.    The method for forming a uniform carbon nanotube conductive paste according to claim 1, wherein the first planetary agitator and the second planetary agitator each comprise: an inner barrel for placing conductive Slurry, and stirring the conductive slurry; an outer tub is for accommodating the inner tub, and cooling water is disposed between the outer tub and the inner tub to cool the conductive slurry inside the inner tub; Disposed in the inner tub and externally connected to the driving mechanism, the revolving stirrer is used for stirring the conductive slurry in a large path, so that the conductive paste forms a large area displacement inside the inner tub The revolving agitator is an approximately U-shaped or V-shaped frame, and a plurality of blades are arranged on the side of the frame; a self-rotating agitator is used for partially stirring the conductive paste locally; Mainly by the block body rotating along its own axis, so that the conductive paste around the rotating agitator forms a vortex; the self-rotating agitator is a two-turn ball, each of which is suspended by a ball The iron column is suspended and driven by the drive mechanism Each of the trackball is rotated about its own axis of rotation through the center of the sphere, and the conductive paste vortex formation.    The method for forming a uniform carbon nanotube conductive paste according to claim 1, wherein the wet grinder comprises: a grinding barrel, wherein the polishing barrel is provided with the conductive paste; The inside of the grinding barrel is configured to fully stir the conductive paste; a plurality of grinding beads are disposed inside the grinding barrel, and when the bead mill is stirred, the grinding bead will hit the inside. Conductive slurry to fully disperse the carbon nanotubes in the conductive paste; a filter for filtering the conductive paste in the grinding barrel to obtain a uniform conductive paste and then transporting it outward.    The method for forming a uniform carbon nanotube conductive paste according to claim 2, wherein in the step A, the mixing and stirring time is about 15 to 20 minutes; the first planetary agitator The revolution frequency of the revolutionary agitator is 40 rpm (rotation per minute), and the rotary agitator of the first planetary agitator has two rotation balls, and the rotation frequency thereof is 200 rpm, and the two balls rotate in the same direction.    The method for forming a uniform carbon nanotube conductive paste according to claim 1, wherein the proportion of the dispersant to the conductive paste is between 0.8% and 1.2% by weight; the dispersant is mainly used Expanding the medium-sized carbon nanotubes without being aggregated or even sinking to the bottom, so that the medium-sized carbon nanotubes can be uniformly distributed in the conductive paste; the dispersant comprises a polymer a dispersant and a low molecular dispersant; wherein the ratio of the polymer dispersant to the low molecular dispersant is 7:3.    The method for forming a uniform carbon nanotube conductive paste according to claim 5, wherein the polymer dispersant is PVP (Polyvinylpyrrolidone, polyvinylpyrrolidone); wherein the low molecular dispersant is a besylate , ammonium bromide salts and ketol (Triton X-100).    The method for forming a uniform carbon nanotube conductive paste according to claim 6, wherein the benzenesulfonate is any one of the besylate salts.    The method for forming a uniform carbon nanotube conductive paste according to claim 6, wherein the ammonium bromide salt is CTAB (cetyltrimethylammonium bromide).    The method for forming a uniform carbon nanotube conductive paste according to claim 1, wherein the medium-sized carbon nanotubes occupies between 1% and 5% by weight of the conductive paste.    The method for forming a uniform carbon nanotube conductive paste as described in claim 2, wherein in the step B, the mixing and stirring time is about 30 to 60 minutes, wherein the first planetary agitator The revolutionary frequency of the revolutionary agitator is 40 rpm, and the rotary agitator of the first planetary agitator is two rotating balls having a rotation frequency of 1200 rpm, and the two rotating balls are reversely rotated.    The method for forming a uniform carbon nanotube conductive paste according to claim 2, wherein in the step C, the mixing and stirring time is about 30 to 60 minutes, wherein the first planetary agitator The revolutionary frequency of the revolutionary agitator is 40 rpm, and the rotary agitator of the first planetary agitator is two rotating balls, and the rotation frequency thereof is 800 rpm, and the two rotating balls are reversely rotated.    The method for forming a uniform carbon nanotube conductive paste according to claim 1, wherein the ratio of the graphene to the conductive paste is between 0.2% and 1.2% by weight; the graphene comprises two a type of graphene having a structure of two to four layers, the proportion of the conductive paste being more than 0% by weight; and the other being graphene having a structure of four to eight layers, which accounts for the conductive paste The proportion of the material is more than 0% by weight, and the ratio of the two kinds of the conductive paste is between 0.2% and 1.2% by weight.    A method of forming a uniform carbon nanotube conductive paste as described in claim 1 wherein the temperature in each step of the first process is between 20 and 30 °C.    A method of forming a uniform carbon nanotube conductive paste as described in claim 3, wherein in the step E, wherein the bead mill has a rotational speed of 2000 to 3000 rpm and an operating temperature of less than 35 °C.    A stirring and grinding mechanism for forming a conductive slurry of uniform carbon nanotubes, wherein a planetary agitator is connected in series with a wet grinder, wherein the conductive paste is first poured into the planetary agitator and then passed by a circulation conveying mechanism The conductive paste circulates between the planetary agitator and the wet grinder; the conductive paste flows back and forth between the planetary agitator and the wet grinder, and different agitation and impact modes are applied to achieve The effect of the sufficient dispersion of the carbon nanotubes in the conductive paste; wherein the conductive paste is first fed to the wet grinder after proper agitation by the planetary agitator, due to the beads in the wet grinder Rotating the agitator, the grinding bead in the wet grinder hits the inner conductive paste to fully dissipate the carbon nanotubes in the conductive paste, and the carbon nanotubes originally reunited together because The abrasive bead is broken by impact; the conductive paste must flow back and forth between the planetary agitator and the wet grinder, and different agitation and impact modes are applied to reach the nanometer in the conductive paste. Carbon tube Fully dispersed utility.    The agitating and polishing mechanism for forming a uniform carbon nanotube conductive paste according to claim 15 wherein the grinding bead is made of zirconia.    The agitating grinding mechanism for forming a uniform carbon nanotube conductive paste according to claim 15 wherein the size of the grinding bead is between 0.5 mm and 1.3 mm.    The agitating grinding mechanism for forming a uniform carbon nanotube conductive paste according to claim 15, wherein the planetary agitator comprises a revolving agitator, and the revolving agitator is an approximate U shape or V The frame is shaped and a plurality of blade structures are disposed on the side of the frame; the agitating agitator rotates along the axis of the frame while stirring, so that the conductive paste forms a displacement of a larger path.    The agitating grinding mechanism for forming a uniform carbon nanotube conductive paste according to claim 15, wherein the planetary agitator comprises: an inner tub for placing the conductive paste and stirring the conductive paste; A rpm agitator is disposed in the inner tub; wherein the revolutionary agitator rotates a volume that exceeds one half of the inner tub volume.    The agitating and grinding mechanism for forming a uniform carbon nanotube conductive paste according to claim 15 , wherein the planetary agitator comprises a self-rotating agitator, wherein the rotary agitator is at least one turning ball, each The ball is suspended by a suspended iron column and driven by a driving mechanism; when rotating, the ball rotates around an axis passing through its own center of the ball to form a eddy current to the conductive paste.    The agitating grinding mechanism for forming a uniform carbon nanotube conductive paste according to claim 20, wherein the rotating agitator is a plurality of rotating balls, and each of the rotating balls has the same or different rotating directions.