Method for etching and modifying waste tire pyrolysis carbon black material by using nitrogen-phosphorus double-doped combined alkaline activator and application of method
The modified cracked carbon black is etched by nitrogen and phosphorus double-doping and alkaline activator, and its pore structure and surface chemical properties are optimized, which solves the application limitations of cracked carbon black materials, and achieves high-value utilization and excellent electrochemical properties.
Patent Information
- Application Number
- CN202510615794.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-08-19
AI Technical Summary
The waste tire cracked carbon black material has poor surface activity and insufficient pore structure development, which limits its application scope and full play to its economic value, making it difficult to achieve high-value recycling.
The nitrogen and phosphorus double-doped modified cracked carbon black was constructed through in-situ polymerization and high-temperature treatment to optimize its pore structure and surface chemistry.
It significantly improves the specific surface area and electrochemical performance of cracked carbon black, is suitable for supercapacitors, and realizes the high-value utilization of scrap tire cracked carbon black.
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of waste tire pyrolysis carbon black treatment and the technical field of new energy materials, and specifically relates to a preparation method of waste tire pyrolysis carbon black material modified by nitrogen and phosphorus dual doping and etching with an alkaline activator, as well as the application of the material in energy storage (supercapacitor) and other fields. Background Art
[0002] The rapid development of the global automotive and transportation sectors has driven the prosperity of the tire manufacturing industry. As the industry continues to expand, the disposal of waste tires has become a major challenge hindering the industry's sustainable development. Currently, traditional methods such as landfill and incineration are widely used to dispose of waste tires. These methods not only inefficiently utilize resources but also lead to increased environmental pollution, frequent safety incidents, and serious threats to the ecosystem. Therefore, the reuse of waste tires has become an urgent issue that needs to be addressed.
[0003] The main products of waste tire pyrolysis are pyrolysis oil, pyrolysis gas, steel wire, and pyrolysis carbon black. Pyrolysis carbon black (CBP) is a complex mixture of carbonaceous deposits formed during the pyrolysis of waste tires. However, due to issues such as poor surface activity and an underdeveloped pore structure, its application is primarily limited to low-end rubber products, severely restricting its full economic value. Therefore, achieving high-value recovery and utilization of pyrolysis carbon black is crucial to promoting the sustainable development of the tire pyrolysis industry.
[0004] Among the applications of pyrolysis carbon black, its use as an energy storage device is currently a hot topic. Supercapacitors are renowned for their rapid charge and discharge capabilities, high power density, long cycle life, and environmental friendliness. As an emerging energy storage device, supercapacitors exhibit enormous potential in a variety of fields, including communications, urban rail transit, and smart distributed grids. They are a common supercapacitor energy storage material. Carbon-based materials exhibit unique advantages, such as high specific surface area, hierarchical pore structure, excellent electrical conductivity, structural stability, and strong controllability. These properties make carbon materials an ideal choice for balancing the energy density and power density of supercapacitors.
[0005] Heteroatom doping is an emerging material modification strategy that can effectively regulate the micromorphology and chemical properties of carbon-based materials by introducing heterogeneous atoms into the lattice structure or surface functional groups of carbon-based materials. This modification method can not only optimize the electronic structure distribution of carbon materials, but also significantly improve their key performance indicators such as electrochemical activity and surface wettability. By regulating the type and content of doping elements, the conductivity, catalytic activity and interface properties of carbon materials can be directional controlled, providing a new research idea for the development of high-performance functional materials. Nitrogen atoms are one of the most common doping elements. Nitrogen atoms can enter carbon materials by replacing carbon atoms or forming surface functional groups such as pyridinic nitrogen, pyrrolic nitrogen, and graphitic nitrogen. P atoms are in the same main group as N in the periodic table and therefore have similar atomic radius and electronic structure. By introducing nitrogen and phosphorus atoms into carbon materials, not only can the structural stability of carbon-based materials be maintained, but also their electron density, number of active sites and surface hydrophilicity can be significantly improved.
[0006] Commonly used nitrogen sources for heteroatom doping include nitrogen-containing compounds such as ammonia, urea, and polyaniline, while phosphorus sources can be divided into inorganic phosphorus sources (such as ammonium phosphate and diammonium hydrogen phosphate) and organic phosphorus sources (such as phytic acid). Inorganic phosphorus sources are easily volatilized or decomposed at high temperatures, resulting in low doping efficiency and uneven distribution, making it difficult to achieve nitrogen-phosphorus co-doping; while organic phosphorus sources form stable C-N-P covalent bonds with the carbon matrix through an in-situ polymerization-carbonization process, which not only effectively inhibits element loss and improves thermal stability, but also can precisely control the doping type (such as pyridinic nitrogen, graphitic nitrogen, or phosphate, etc.), optimize the electronic structure and surface activity of the material, and enhance the electrochemical performance and long-term durability of the material. Compared with inorganic phosphorus sources, organic phosphorus sources have significant advantages in doping controllability, element distribution uniformity, and material stability. Summary of the Invention
[0007] The technical problem addressed by this invention is to provide a method for modifying pyrolysis carbon black materials through nitrogen and phosphorus dual doping and alkaline activator etching. By doping the pyrolysis carbon black with nitrogen and phosphorus and then etching and activating it with an alkaline activator, the internal structure of the material is modified, resulting in a desired nitrogen and phosphorus content, a high specific surface area, and a well-developed pore structure. The working electrode prepared from the modified pyrolysis carbon black exhibits excellent capacitance characteristics in supercapacitors.
[0008] To achieve the above objectives, the present invention adopts the following specific technical solutions:
[0009] In a first aspect, a method for etching and modifying waste tire pyrolysis carbon black by nitrogen and phosphorus dual doping combined with an alkaline activator comprises the following steps:
[0010] S1: The pyrolysis carbon black is subjected to acid washing and deashing to obtain purified pyrolysis carbon black, the purified pyrolysis carbon black is added to a flask, a phosphorus source raw material, p-phenylenediamine and triethylamine are added, and a solvent 1,4-dioxane is added, and the mixture is heated in an oil bath for reaction. The pyrolysis carbon black is polymerized in situ to obtain a nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor material;
[0011] Optionally, the phosphorus source raw material includes one or both of hexachlorocyclotriphosphazene and phenylphosphonic dichloride;
[0012] Furthermore, the mass ratio of the purified pyrolysis carbon black to the phosphorus source is 1:1-1:3;
[0013] Furthermore, the ratio of the phosphorus source raw material to the p-phenylenediamine substance is 1:2-1:4, and the ratio of the phosphorus source raw material to the triethylamine substance is 1:4-1:8.
[0014] Furthermore, the solid-liquid ratio of the purified cracked carbon black and the solvent 1,4-dioxane is 1g:40-80mL.
[0015] Furthermore, the oil bath temperature is 80-120° C., and the reaction time is 10-15 h.
[0016] S2: High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor material to obtain pretreated material CBP-NP;
[0017] Furthermore, the high temperature treatment temperature is 700-900° C., and the treatment time is 60-120 minutes.
[0018] S3: using an alkaline activator to etch the CBP-NP material to obtain nitrogen and phosphorus dual-doped modified pyrolysis carbon black ACBP-NP.
[0019] Optionally, the activator includes one or more of KOH, NaOH, Na2CO3 and K2CO3.
[0020] Furthermore, the etching treatment temperature is 500-700° C., and the etching treatment time is 60-150 minutes.
[0021] In the second aspect, the application of ACBP-NP, a carbon black material modified by pore etching with nitrogen and phosphorus dual doping and alkaline activator, as an electrode material includes the following steps:
[0022] S1: The nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor pretreated at high temperature is made into a working electrode.
[0023] S2: The counter electrode is a curled nickel wire, and the reference electrode is a Zn / ZnO system.
[0024] S3: Select 6M KOH solution as the electrolyte, assemble into a three-electrode system, and test in the blue battery system and electrochemical workstation.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] This invention utilizes organic phosphorus such as hexachlorocyclotriphosphazene as a phosphorus source for in-situ polymerization doping of pyrolysis carbon black, effectively suppressing the loss of doping elements and improving doping uniformity. Etching the internal pore structure of the pyrolysis carbon black with an alkaline activator allows for material electronegativity control, increased specific surface area, and the construction of a rich microporous structure. The method provided by this invention offers the advantages of flexible adjustability and simple process flow, enabling the construction of supercapacitors with high specific capacity, high rate performance, and excellent cycling stability. This method is of great significance for the application of pyrolysis carbon black in energy storage, achieving high-value utilization of pyrolysis carbon black from waste tires. DETAILED DESCRIPTION
[0027] The embodiments of the present invention will be described in detail below with reference to specific examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.
[0028] Example 1
[0029] A method for preparing modified pyrolysis carbon black by etching pores of nitrogen and phosphorus dual-doped and alkaline activator-modified pyrolysis carbon black material, the specific operation is as follows:
[0030] (1) Preparation of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0031] Pyrolysis carbon black was added to 2M HCl at a solid-liquid ratio of 1:10 and heated in a water bath at 65°C for 6 hours. After the reaction was completed and filtered, 2M HF was added and heated in a water bath at 80°C for 4 hours. The mixture was then filtered, washed, and dried to prepare purified carbon black. 1.5g of purified pyrolysis carbon black was then added to a three-necked flask as a substrate. 2.78g of hexachlorocyclotriphosphazene (HCCP) and 2.6g of p-phenylenediamine were dissolved in 100mL of 1,4-epoxyhexacyclopentadiene. 4.86g of triethylamine was added dropwise to the flask with constant stirring. The mixture was heated in an oil bath at 90°C for 12 hours with a reflux condenser. After the reaction was complete, the product was filtered, washed, and dried to obtain the nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor, CBP-HCCP.
[0032] (2) High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0033] 2.5 g of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor was placed in a nickel boat, transferred to a tube furnace, and heated at 5 °C min in a N2 atmosphere. -1The temperature was raised to 800°C at a rate of 10000 ℃ and maintained for 90 minutes. The reaction was completed to obtain pretreated pyrolysis carbon black (CBP-NP).
[0034] (3) Alkaline activator etching treatment of cracked carbon black
[0035] 1.5 g of pretreated pyrolysis carbon black CBP-NP was mixed with 6 g of alkaline activator KOH and placed in a tube furnace at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 600 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain nitrogen and phosphorus dual-doped combined with KOH etched pore-modified pyrolysis carbon black (ACBP-NP-KOH).
[0036] ACBP-NP-KOH was prepared as a working electrode, a curled nickel wire was selected as the counter electrode, a Zn / ZnO system was selected as the reference electrode, and a 6M KOH solution was selected as the electrolyte to form a three-electrode system for testing. -1 290F g available -1 Specific capacity.
[0037] Example 2
[0038] A method for preparing modified pyrolysis carbon black by etching pores of nitrogen and phosphorus dual-doped and alkaline activator-modified pyrolysis carbon black material, the specific operation is as follows:
[0039] (1) Preparation of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0040] Pyrolysis carbon black was added to 2M HCl at a solid-liquid ratio of 1:10 and heated in a water bath at 65°C for 6 hours. After the reaction was completed and filtered, 2M HF was added and heated in a water bath at 80°C for 4 hours. The mixture was then filtered, washed, and dried to prepare purified carbon black. 2.0g of the purified pyrolysis carbon black was then added to a three-necked flask as a substrate. 2.78g of hexachlorocyclotriphosphazene (HCCP) and 2.6g of p-phenylenediamine were dissolved in 100mL of 1,4-epoxyhexacyclopentadiene. 4.86g of triethylamine was added dropwise to the flask with constant stirring. The mixture was heated in an oil bath at 120°C for 8 hours with a reflux condenser. After the reaction was complete, the product was filtered, washed, and dried to obtain the nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor, CBP-HCCP.
[0041] (2) High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0042] 2.5 g of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor was placed in a nickel boat, transferred to a tube furnace, and heated at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 800°C at a rate of 10000 ℃ and maintained for 90 minutes. The reaction was completed to obtain pretreated pyrolysis carbon black (CBP-NP).
[0043] (3) Alkaline activator etching treatment of cracked carbon black
[0044] 1.5 g of pretreated pyrolysis carbon black CBP-NP was mixed with 6 g of alkaline activator KOH and placed in a tube furnace at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 600 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain nitrogen and phosphorus dual-doped combined with KOH etched pore-modified pyrolysis carbon black (ACBP-NP-KOH).
[0045] ACBP-NP-KOH was prepared as a working electrode, a curled nickel wire was selected as the counter electrode, a Zn / ZnO system was selected as the reference electrode, and a 6M KOH solution was selected as the electrolyte to form a three-electrode system for testing. -1 250F g available -1 Specific capacity.
[0046] Example 3
[0047] A method for preparing modified pyrolysis carbon black by etching pores of nitrogen and phosphorus dual-doped and alkaline activator-modified pyrolysis carbon black material, the specific operation is as follows:
[0048] (1) Preparation of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0049] Pyrolysis carbon black was added to 2M HCl at a solid-liquid ratio of 1:10 and heated in a water bath at 65°C for 6 hours. After the reaction was completed, the mixture was filtered and then 2M HF was added and heated in a water bath at 80°C for 4 hours. The mixture was then filtered, washed, and dried to prepare purified carbon black. 1.5g of purified pyrolysis carbon black was then added to a three-necked flask as a substrate. 2.78g of hexachlorocyclotriphosphazene (HCCP) and 2.6g of p-phenylenediamine were dissolved in 100mL of 1,4-epoxyhexacyclopentadiene. 4.86g of triethylamine was added dropwise to the flask with constant stirring. The mixture was heated in an oil bath at 120°C for 10 hours with a reflux condenser. After the reaction was complete, the product was filtered, washed, and dried to obtain the nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor, CBP-HCCP.
[0050] (2) High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0051] 2.5 g of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor was placed in a nickel boat, transferred to a tube furnace, and heated at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 800°C at a rate of 10000 ℃ and maintained for 90 minutes. The reaction was completed to obtain pretreated pyrolysis carbon black (CBP-NP).
[0052] (3) Alkaline activator etching treatment of cracked carbon black
[0053] 1.5 g of pretreated pyrolysis carbon black CBP-NP was mixed with 6 g of alkaline activator K2CO3 and placed in a tube furnace at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 600 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain nitrogen and phosphorus dual-doped and K2CO3 etched pore-modified pyrolysis carbon black (ACBP-NP-K2CO3).
[0054] ACBP-NP-K2CO3 was prepared as a working electrode by combining nitrogen and phosphorus dual doping with K2CO3 etched pores to modify pyrolysis carbon black. The counter electrode was a curled nickel wire, the reference electrode was a Zn / ZnO system, and the electrolyte was a 6M KOH solution. The three-electrode system was assembled and tested. -1 190F g available -1 Specific capacity.
[0055] Example 4
[0056] A method for preparing modified pyrolysis carbon black by etching pores of nitrogen and phosphorus dual-doped and alkaline activator-modified pyrolysis carbon black material, the specific operation is as follows:
[0057] (1) Preparation of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0058] Pyrolysis carbon black was added to 2M HCl at a solid-liquid ratio of 1:10 and heated in a water bath at 65°C for 6 hours. After the reaction was completed and filtered, 2M HF was added and heated in a water bath at 80°C for 4 hours. The mixture was then filtered, washed, and dried to prepare purified carbon black. 1.5g of purified pyrolysis carbon black was then added to a three-necked flask as a substrate. 2.78g of hexachlorocyclotriphosphazene (HCCP) and 2.6g of p-phenylenediamine were dissolved in 100mL of 1,4-epoxyhexacyclopentadiene. 4.86g of triethylamine was added dropwise to the flask with constant stirring. The mixture was heated in an oil bath at 90°C for 12 hours with a reflux condenser. After the reaction was complete, the product was filtered, washed, and dried to obtain the nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor, CBP-HCCP.
[0059] (2) High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0060] 2.5 g of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor was placed in a nickel boat, transferred to a tube furnace, and heated at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 700 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain pretreated pyrolysis carbon black (CBP-NP).
[0061] (3) Alkaline activator etching treatment of cracked carbon black
[0062] 1.5 g of pretreated pyrolysis carbon black CBP-NP was mixed with 6 g of alkaline activator KOH and placed in a tube furnace at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 600 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain nitrogen and phosphorus dual-doped combined with KOH etched pore-modified pyrolysis carbon black (ACBP-NP-KOH).
[0063] ACBP-NP-KOH was prepared as a working electrode, a curled nickel wire was selected as the counter electrode, a Zn / ZnO system was selected as the reference electrode, and a 6M KOH solution was selected as the electrolyte to form a three-electrode system for testing. -1 230F g available -1 Specific capacity.
[0064] Example 5
[0065] A method for preparing modified pyrolysis carbon black by etching pores of nitrogen and phosphorus dual-doped and alkaline activator-modified pyrolysis carbon black material, the specific operation is as follows:
[0066] (1) Preparation of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0067] Pyrolysis carbon black was added to 2M HCl at a solid-liquid ratio of 1:10 and heated in a water bath at 65°C for 6 hours. After the reaction was completed, the mixture was filtered and then 2M HF was added and heated in a water bath at 80°C for 4 hours. The mixture was then filtered, washed, and dried to prepare purified carbon black. 1.5g of the purified pyrolysis carbon black was then added to a three-necked flask as a substrate. 2.0g of phenylphosphonyl dichloride (PPDC) and 2.16g of p-phenylenediamine were dissolved in 80mL of 1,4-epoxyhexacyclopentane. 2.02g of triethylamine was added dropwise to the flask with constant stirring. The mixture was heated in an oil bath at 90°C for 12 hours with a reflux condenser. After the reaction was complete, the product was filtered, washed, and dried to obtain the nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor, CBP-HCCP.
[0068] (2) High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor
[0069] 2.5 g of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor was placed in a nickel boat, transferred to a tube furnace, and heated at 5 °C min in a N2 atmosphere. -1 The temperature was raised to 800°C at a rate of 10000 ℃ and maintained for 90 minutes. The reaction was completed to obtain pretreated pyrolysis carbon black (CBP-NP).
[0070] (3) Alkaline activator etching treatment of cracked carbon black
[0071] 1.5 g of pretreated pyrolysis carbon black CBP-NP was mixed with 6 g of alkaline activator KOH and placed in a tube furnace at 5 °C min in a N2 atmosphere.-1 The temperature was raised to 600 °C at a rate of 10000 ℃ and maintained for 120 min. The reaction was completed to obtain nitrogen and phosphorus dual-doped combined with KOH etched pore-modified pyrolysis carbon black (ACBP-NP-KOH).
[0072] ACBP-NP-KOH was prepared as a working electrode, a curled nickel wire was selected as the counter electrode, a Zn / ZnO system was selected as the reference electrode, and a 6M KOH solution was selected as the electrolyte to form a three-electrode system for testing. -1 210F g available -1 Specific capacity.
[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
[0074] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is intended solely to enhance understanding of the overall background of the present invention and should not be construed as an admission or any form of implication that such information constitutes prior art known to those skilled in the art.
Claims
1. A method for etching and modifying waste tire pyrolysis carbon black by nitrogen and phosphorus dual doping combined with an alkaline activator, comprising the following steps: S1: The pyrolysis carbon black is subjected to acid washing and deashing to obtain purified pyrolysis carbon black, the purified pyrolysis carbon black is added to a flask, a phosphorus source raw material, p-phenylenediamine and triethylamine are added, and a solvent 1,4-dioxane is added, and the mixture is heated in an oil bath for reaction. The pyrolysis carbon black is polymerized in situ to obtain a nitrogen-phosphorus dual-doped modified pyrolysis carbon black precursor material; S2: High-temperature treatment of nitrogen and phosphorus dual-doped modified pyrolysis carbon black precursor material to obtain pretreated material CBP-NP; S3: using an alkaline activator to etch the CBP-NP material to obtain nitrogen and phosphorus dual-doped modified pyrolysis carbon black ACBP-NP.
2. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S1, the phosphorus source raw materials include one or both of hexachlorocyclotriphosphazene and phenylphosphonic dichloride.
3. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S1, the mass ratio of the purified pyrolysis carbon black to the phosphorus source raw material is 1:1-1:
3.
4. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S1, the ratio of the phosphorus source raw material to the p-phenylenediamine substance is 1:2-1:4, and the ratio of the phosphorus source raw material to the triethylamine substance is 1:4-1:
8.
5. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S1, the solid-to-liquid ratio of the purified cracked carbon black and the solvent 1,4-dioxane is 1 g:40-80 mL.
6. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S1, the oil bath temperature is 80-120° C., and the reaction time is 10-15 h.
7. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S2, the high temperature treatment temperature is 700-900° C., and the high temperature treatment time is 60-120 minutes.
8. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S3, the activating agent includes one or more of KOH, NaOH, Na2CO3 and K2CO3.
9. The method for preparing nitrogen and phosphorus dual-doping combined with alkaline activator etching modified pyrolysis carbon black according to claim 1, characterized in that: In step S3, the etching temperature is 500-700° C., and the etching time is 60-150 minutes.