CN110295378B - Preparation method of manganese dioxide-conductive polypropylene composite anode plate - Google Patents
Preparation method of manganese dioxide-conductive polypropylene composite anode plate Download PDFInfo
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- CN110295378B CN110295378B CN201910568457.5A CN201910568457A CN110295378B CN 110295378 B CN110295378 B CN 110295378B CN 201910568457 A CN201910568457 A CN 201910568457A CN 110295378 B CN110295378 B CN 110295378B
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- -1 polypropylene Polymers 0.000 title claims abstract description 92
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 66
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 66
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 32
- 239000011572 manganese Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000000919 ceramic Substances 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 48
- 239000006229 carbon black Substances 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000011812 mixed powder Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 16
- 229920002545 silicone oil Polymers 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 abstract description 26
- 229920000573 polyethylene Polymers 0.000 abstract description 26
- 239000011159 matrix material Substances 0.000 abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 239000011701 zinc Substances 0.000 abstract description 8
- 229910052725 zinc Inorganic materials 0.000 abstract description 8
- 238000004070 electrodeposition Methods 0.000 abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 4
- 238000009826 distribution Methods 0.000 abstract 1
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 18
- 238000003825 pressing Methods 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 239000003921 oil Substances 0.000 description 13
- 229910052710 silicon Inorganic materials 0.000 description 13
- 239000010703 silicon Substances 0.000 description 13
- 241000872198 Serjania polyphylla Species 0.000 description 12
- 239000010410 layer Substances 0.000 description 9
- 238000005507 spraying Methods 0.000 description 8
- 238000000227 grinding Methods 0.000 description 6
- 229910001316 Ag alloy Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229940024464 emollients and protectives zinc product Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Conductive Materials (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
The invention discloses a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which comprises the following steps: the following raw materials are respectively measured according to volume percentage: 5-70% of carbon black, 0.1-2% of copper powder and the balance of polypropylene powder, mixing the above powders, flatly paving the mixture between two preheated ceramic plates, placing the mixture in a high-temperature furnace for press forming to obtain a polyethylene plate, coating the polyethylene plate with manganese dioxide powder, passing the mixture between the two preheated ceramic plates, and placing the mixture in the high-temperature furnace for press forming to obtain the manganese dioxide-conductive polypropylene composite anode plate. The invention has simple operation flow, continuous net distribution of conductive carbon black and uniform distribution of copper powder in the composite anode plate, greatly reduces the resistivity of the conductive polypropylene, and simultaneously, the composite anode plate prepared by the method has lower oxygen evolution potential in the zinc electrodeposition process, and the surface manganese dioxide is well connected with the conductive polypropylene matrix.
Description
Technical Field
The invention belongs to the technical field of electrode material preparation, and relates to a preparation method of a manganese dioxide-conductive polypropylene composite anode plate.
Background
Manganese dioxide has high catalytic activity in the process of zinc electrodeposition, the manganese dioxide plays double roles of protecting a lead electrode matrix from further corrosion and catalyzing oxygen precipitation in a traditional lead-based anode plate, and meanwhile, a titanium-based manganese dioxide anode (manganese dioxide is deposited on the titanium matrix in a surface coating mode) also shows excellent performance, so that the manganese dioxide has good effect in the process of zinc electrode when being used as a surface layer of the electrode. However, the use of lead-based anode can reduce the quality of cathode zinc products (lead is dissolved in electrolyte and then is separated out on the cathode after being corroded), and manganese dioxide in the titanium-based manganese dioxide anode plate is deposited on the surface of the titanium-based anode plate in the form of a film and is easy to fall off, so that the service life is greatly reduced. The manganese dioxide powder has a low decomposition temperature, and manganese dioxide is decomposed when the softening temperature of metal is not reached, so that it is difficult to composite the manganese dioxide powder with metal by means of hot pressing.
Disclosure of Invention
The invention aims to provide a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which solves the problems that in the prior art, manganese dioxide is difficult to form stable connection with metal in a hot pressing mode, and the quality of a cathode zinc product is reduced due to the use of a lead-based anode.
The invention adopts the technical scheme that the preparation method of the manganese dioxide-conductive polypropylene composite anode plate is implemented according to the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 5-70% of carbon black, 0.1-2% of copper powder and the balance of polypropylene powder;
step 2, fully mixing the carbon black, the copper powder and the polypropylene powder measured in the step 1 to obtain mixed powder, uniformly paving the mixed powder between two preheated ceramic plates, placing the ceramic plates in a high-temperature furnace for compression molding, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two preheated ceramic plates, placing the ceramic plates in a high-temperature furnace for compression molding, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
The invention is also characterized in that:
in the step 1, the granularity of the polyethylene powder and the granularity of the copper powder are both 50-400 meshes.
And (3) spraying a silicon oil release agent on the ceramic plates in the step 2 and the step 3.
The pressure applied in the step 2 and the step 3 is 500-6000 pa.
The temperature of the high-temperature furnace in the step 2 and the step 3 is 100-250 ℃, and the ceramic plate is placed in the high-temperature furnace for 5-60 min.
And in the step 2, the thickness of the mixed powder paved between the two ceramic plates is 5-12 mm.
The structure between the ceramic plates in the step 3 is a manganese dioxide layer, a conductive polyethylene plate and a manganese dioxide layer in sequence.
The high-temperature furnace in the step 1 is a box-type furnace.
The invention has the beneficial effects that: the invention completes the pressing process of the manganese dioxide-conductive polypropylene composite anode plate in the box type furnace, can freely adjust the pressing force and simplifies the conditions and equipment required by the pressing forming; the polypropylene has the advantages of high strength, good heat resistance, acid medium corrosion resistance, light weight and easy processing, the composite material has better conductivity by compounding the conductive filler therein, the polypropylene molding temperature is low, and MnO cannot be caused in the compounding process2The quality of the cathode zinc product is not reduced by using the polyethylene, the conductive carbon black in the conductive polypropylene plate prepared by the method is continuously distributed in a network shape in the matrix, and the added copper powder is uniformly distributed in the matrix, so that the conductivity of the conductive polypropylene is improved; the prepared manganese dioxide-conductive polypropylene composite anode plate has a lower oxygen evolution potential in the zinc electrodeposition process, and the surface manganese dioxide is well connected with the conductive polypropylene matrix.
Drawings
FIG. 1 is a flow chart of a method for preparing a manganese dioxide-conductive polypropylene composite anode plate according to the invention;
FIG. 2 is a microstructure micrograph of a composite anode plate made by a method of making a manganese dioxide-conductive polypropylene composite anode plate according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which is specifically implemented according to the following steps as shown in figure 1:
step 1, respectively measuring the following raw materials in percentage by volume: 5-70% of carbon black with the particle size of 0.5-5 mm, 0.1-2% of copper powder with the particle size of 50-400 meshes, and the balance of polypropylene powder with the particle size of 50-400 meshes.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 30-50 cm from the ceramic plates to form uniformly-covered thin layers, wherein the thickness of the mixed powder is 5-12 mm, placing the ceramic plates in a box furnace at the temperature of 100-250 ℃, applying a balance weight at the pressure of 500-6000 pa, pressing for 5-60 min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 100-250 ℃, applying a counter weight at the pressure of 500-6000 pa, pressing for 5-60 min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
The preparation method of the manganese dioxide-conductive polypropylene composite anode plate comprises the following steps: the polypropylene is selected because the polypropylene has the advantages of high strength, good heat resistance, acid medium corrosion resistance, light weight and easy processing, the conductive filler is compounded in the polypropylene, so that the polypropylene also has good conductivity, the molding temperature is low, and the manganese dioxide is not decomposed in the compounding process;
the reason for preheating the ceramic plate in the step 2 is to reduce the heat loss in the compression molding process so as to shorten the molding time, the silicone release agent is sprayed on the two surfaces of the ceramic plate to facilitate the separation of the final finished product, and the thin layer which is uniformly covered is sprayed at a distance of 30-50 cm from the ceramic plate during spraying.
TABLE 1 oxygen evolution potential of manganese dioxide-conductive polypropylene composite anode plate and lead-silver alloy anode plate
| Kind of electrode | Manganese dioxide-conductive polypropylene composite anode plate | Existing lead-silver alloy anode plate |
| Oxygen evolution potential (V.vs SCE) | 1.46 | 1.89～1.94 |
FIG. 2(a) is a matrix shape of a composite anode plate prepared by the preparation method of the manganese dioxide-conductive polypropylene composite anode plate, from which it can be seen that conductive carbon black forms a complete conductive network in the matrix, and Cu powder is uniformly distributed in a conductive path of the carbon black, so that the conductivity of the matrix is increased; fig. 2(b) shows the connection morphology of the composite position of manganese dioxide and conductive polypropylene of the composite anode plate prepared by the preparation method of the manganese dioxide-conductive polypropylene composite anode plate, and the composite position can be seen to have a compact structure and is not easy to separate.
Table 1 shows the oxygen evolution potential of the composite anode plate prepared by the method of the present invention and the existing lead-silver alloy anode plate in the process of zinc electrodeposition, and it can be seen from the table that the oxygen evolution potential of the composite anode plate prepared by the method of the present invention in the process of zinc electrodeposition is significantly lower than that of the existing lead-silver alloy anode plate, and the lower oxygen evolution potential can reduce the energy loss in the conductive process.
Example 1
A preparation method of a manganese dioxide-conductive polypropylene composite anode plate is specifically implemented according to the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 10% of carbon black with a particle size of 0.5mm, 0.1% of copper powder with a particle size of 50 mesh, and the balance of polypropylene powder with a particle size of 50 mesh.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 30cm from the ceramic plates to form a uniformly covered thin layer, wherein the thickness of the mixed powder is 5mm, placing the ceramic plates in a box-type furnace at the temperature of 100 ℃, applying a balance weight at the pressure of 500pa, pressing for 5min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 100 ℃, applying a balance weight with the pressure of 500pa, pressing for 5min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
Example 2
A preparation method of a manganese dioxide-conductive polypropylene composite anode plate is shown in figure 1 and specifically comprises the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 25% of carbon black with the particle size of 2mm, 0.5% of copper powder with the particle size of 100 meshes and the balance of polypropylene powder with the particle size of 100 meshes.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 35cm from the ceramic plates to form a uniformly covered thin layer, wherein the thickness of the mixed powder is 7mm, placing the ceramic plates in a box-type furnace at the temperature of 150 ℃, applying a balance weight with the pressure of 1000pa, pressing for 15min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 150 ℃, applying a balance weight with the pressure of 1000pa, pressing for 15min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
Example 3
The invention relates to a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which is implemented according to the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 40% of carbon black with the particle size of 3mm, 1% of copper powder with the particle size of 200 meshes and the balance of polypropylene powder with the particle size of 200 meshes.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 40cm from the ceramic plates to form a uniformly covered thin layer, wherein the thickness of the mixed powder is 9mm, placing the ceramic plates in a box-type furnace at the temperature of 200 ℃, applying a balance weight at the pressure of 3000pa, pressing for 30min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 200 ℃, applying a balance weight with the pressure of 3000pa, pressing for 30min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
Example 4
The invention relates to a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which is implemented according to the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 55 percent of carbon black with the particle size of 4mm, 1.5 percent of copper powder with the particle size of 300 meshes, and the balance of polypropylene powder with the particle size of 300 meshes.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 40cm from the ceramic plates to form a uniformly covered thin layer, wherein the thickness of the mixed powder is 11mm, placing the ceramic plates in a box-type furnace at the temperature of 200 ℃, applying a balance weight at the pressure of 4500pa, pressing for 45min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 200 ℃, applying a balance weight with the pressure of 4500pa, pressing for 45min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
Example 5
The invention relates to a preparation method of a manganese dioxide-conductive polypropylene composite anode plate, which is implemented according to the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 70% of carbon black with the particle size of 5mm, 2% of copper powder with the particle size of 400 meshes and the balance of polypropylene powder with the particle size of 400 meshes.
Step 2, fully grinding the carbon black measured in the step 1, fully mixing the carbon black with copper powder and polypropylene powder to obtain mixed powder, uniformly paving the mixed powder between two ceramic plates which are preheated and sprayed with a silicon oil release agent, spraying the silicon oil release agent at a distance of 50cm from the ceramic plates to form a uniformly covered thin layer, wherein the thickness of the mixed powder is 12mm, placing the ceramic plates in a box-type furnace at the temperature of 250 ℃, applying a balance weight at the pressure of 6000pa, pressing for 60min, and cooling to room temperature to obtain a conductive polyethylene plate;
and 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the upper surface and the lower surface of the conductive polyethylene plate obtained in the step 2, placing the conductive polyethylene plate coated with the manganese dioxide powder between two ceramic plates which are preheated and sprayed with a silicone oil release agent, placing the ceramic plates in a box furnace at the temperature of 250 ℃, applying a balance weight with the pressure of 6000pa, pressing for 60min, and cooling to room temperature to obtain the manganese dioxide-conductive polypropylene composite anode plate.
Claims (2)
1. The preparation method of the manganese dioxide-conductive polypropylene composite anode plate is characterized by comprising the following steps:
step 1, respectively measuring the following raw materials in percentage by volume: 5-70% of carbon black, 0.1-2% of copper powder and the balance of polypropylene powder;
step 2, fully mixing the carbon black, the copper powder and the polypropylene powder measured in the step 1 to obtain mixed powder, uniformly paving the mixed powder between two preheated ceramic plates, placing the ceramic plates in a high-temperature furnace for compression molding, and cooling to room temperature to obtain a conductive polypropylene plate;
step 3, taking manganese dioxide powder, coating the obtained manganese dioxide powder on the conductive polypropylene plate obtained in the step 2, placing the conductive polypropylene plate coated with the manganese dioxide powder between two preheated ceramic plates, placing the ceramic plates in a high-temperature furnace for compression molding, and cooling to room temperature to obtain a manganese dioxide-conductive polypropylene composite anode plate;
the pressure applied in the step 2 and the step 3 is 500-6000 pa;
the temperature of the high-temperature furnace in the step 2 and the step 3 is 100-250 ℃, and the ceramic plate is placed in the high-temperature furnace for 5-60 min;
the thickness of the mixed powder paved between the two ceramic plates in the step 2 is 5-12 mm;
the structure among the ceramic plates in the step 3 is a manganese dioxide layer, a conductive polypropylene plate and a manganese dioxide layer in sequence;
the high-temperature furnace in the step 1 is a box-type furnace;
in the step 1, the granularity of the polypropylene powder and the granularity of the copper powder are both 50-400 meshes.
2. The method for preparing the manganese dioxide-conductive polypropylene composite anode plate according to claim 1, wherein the ceramic plates in the step 2 and the step 3 are both sprayed with a silicone oil release agent.
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Granted publication date: 20201218 |