A sulfur-doped catalytic oil slurry-based porous carbon material and its preparation method

Abstract

A sulfur-doped catalytic slurry oil-based porous carbon material and a preparation method thereof are provided, belonging to the field of comprehensive utilization of catalytic cracking slurry oil andfunctional carbon materials. The technical problem to be solved by the invention is the current problem of deep processing and utilization of catalytic slurry oil. The method comprises the steps of adding a certain volume of cyclohexane to catalytic slurry oil under the heating condition, stirring until the catalytic slurry oil is uniform, filtering under vacuum, distilling the filtrate under reduced pressure, adding a certain amount of pore-forming agent to the clarified oil, stirring uniformly under the ultrasonic heating condition, heating a heating furnace to a certain temperature under the protection of inert gas, injecting the prepared mixture into the heating furnace through an injector for pyrolysis reaction to obtain pyrolysis products, elemental sulfur and carbon disulfide, stirring for a certain time under the ultrasonic condition, filtering under vacuum, collecting insoluble matters, and drying to obtain a sulfur-doped catalytic slurry oil-based porous carbon material. Thematerial is used to alleviate the volume effect of a sulfur positive electrode.

Description

technical field

[0001] The invention belongs to the field of comprehensive utilization of catalytic cracking oil slurry and functional carbon materials, and in particular relates to a sulfur-doped catalytic oil slurry-based porous carbon material and a preparation method thereof. Background technique

[0002] With the rapid development of portable electronic devices and electric vehicles, the development of new high energy density secondary batteries has attracted more and more attention. Among them, lithium-sulfur batteries with high energy density have attracted more and more attention from researchers due to their excellent electrical properties. Lithium-sulfur battery is an electrochemical energy storage device that stores electrical energy in sulfur electrodes. At present, research work on lithium-sulfur batteries mainly focuses on the design and synthesis of high-performance sulfur cathode materials. In the positive electrode material, the theoretical mass specific ca...

Examples

specific Embodiment approach 1

[0031] A preparation method of sulfur-doped catalytic oil slurry-based porous carbon material, comprising the steps of:

[0032] Step 1. Pretreatment of oil slurry: under heating conditions, add a certain volume of cyclohexane to the catalytic oil slurry, stir until uniform, vacuum filter, and carry out vacuum distillation on the filtrate to obtain clarified oil, which is ready for use;

[0033] Step 2, raw material blending: add a certain quality of pore-forming agent to the clarified oil prepared in step 1, heat and stir evenly under ultrasonic conditions, and then add the obtained mixture into a syringe for use;

[0034] Step 3, high-temperature carbonization: under the protection of an inert gas, after the heating furnace is heated to a certain temperature, the mixture prepared in step 2 is injected into the heating furnace through a syringe for pyrolysis reaction, and a pyrolysis product is obtained after the reaction, which is ready for use;

[0035] Step 4, sulfur-carbo...

specific Embodiment approach 2

[0050] A preparation method of sulfur-doped catalytic oil slurry-based porous carbon material, comprising the steps of:

[0051] Step 1. Pretreatment of oil slurry: under heating conditions, add a certain volume of cyclohexane to the catalytic oil slurry, stir until uniform, vacuum filter, and carry out vacuum distillation on the filtrate to obtain clarified oil, which is ready for use;

[0052] Step 2, raw material blending: add a certain quality of pore-forming agent to the clarified oil prepared in step 1, heat and stir evenly under ultrasonic conditions, and then add the obtained mixture into a syringe for use;

[0053] Step 3, high-temperature carbonization: under the protection of an inert gas, after the heating furnace is heated to a certain temperature, the mixture prepared in step 2 is injected into the heating furnace through a syringe for pyrolysis reaction, and a pyrolysis product is obtained after the reaction, which is ready for use;

[0054] Step 4, sulfur-carbo...

specific Embodiment approach 3

[0058] According to the preparation method of a sulfur-doped catalytic oil slurry-based porous carbon material described in the second specific embodiment, after the catalytic oil slurry is heated to 40-50°C in step 1, cyclohexane is added to the catalytic oil slurry, and the catalytic oil The solid-liquid ratio of slurry to cyclohexane is 5-10g: 200-300mL. After stirring evenly, add cyclohexane again. The solid-liquid ratio of catalytic oil slurry to cyclohexane is 5-10g: 300- 400mL.

technical field

[0001] The invention belongs to the field of comprehensive utilization of catalytic cracking oil slurry and functional carbon materials, and in particular relates to a sulfur-doped catalytic oil slurry-based porous carbon material and a preparation method thereof. Background technique

[0002] With the rapid development of portable electronic devices and electric vehicles, the development of new high energy density secondary batteries has attracted more and more attention. Among them, lithium-sulfur batteries with high energy density have attracted more and more attention from researchers due to their excellent electrical properties. Lithium-sulfur battery is an electrochemical energy storage device that stores electrical energy in sulfur electrodes. At present, research work on lithium-sulfur batteries mainly focuses on the design and synthesis of high-performance sulfur cathode materials. In the positive electrode material, the theoretical mass specific ca...

Examples

specific Embodiment approach 1

[0031] A preparation method of sulfur-doped catalytic oil slurry-based porous carbon material, comprising the steps of:

[0032] Step 1. Pretreatment of oil slurry: under heating conditions, add a certain volume of cyclohexane to the catalytic oil slurry, stir until uniform, vacuum filter, and carry out vacuum distillation on the filtrate to obtain clarified oil, which is ready for use;

[0033] Step 2, raw material blending: add a certain quality of pore-forming agent to the clarified oil prepared in step 1, heat and stir evenly under ultrasonic conditions, and then add the obtained mixture into a syringe for use;

[0034] Step 3, high-temperature carbonization: under the protection of an inert gas, after the heating furnace is heated to a certain temperature, the mixture prepared in step 2 is injected into the heating furnace through a syringe for pyrolysis reaction, and a pyrolysis product is obtained after the reaction, which is ready for use;

[0035] Step 4, sulfur-carbo...

specific Embodiment approach 2

[0050] A preparation method of sulfur-doped catalytic oil slurry-based porous carbon material, comprising the steps of:

[0051] Step 1. Pretreatment of oil slurry: under heating conditions, add a certain volume of cyclohexane to the catalytic oil slurry, stir until uniform, vacuum filter, and carry out vacuum distillation on the filtrate to obtain clarified oil, which is ready for use;

[0052] Step 2, raw material blending: add a certain quality of pore-forming agent to the clarified oil prepared in step 1, heat and stir evenly under ultrasonic conditions, and then add the obtained mixture into a syringe for use;

[0053] Step 3, high-temperature carbonization: under the protection of an inert gas, after the heating furnace is heated to a certain temperature, the mixture prepared in step 2 is injected into the heating furnace through a syringe for pyrolysis reaction, and a pyrolysis product is obtained after the reaction, which is ready for use;

[0054] Step 4, sulfur-carbo...

specific Embodiment approach 3

[0058] According to the preparation method of a sulfur-doped catalytic oil slurry-based porous carbon material described in the second specific embodiment, after the catalytic oil slurry is heated to 40-50°C in step 1, cyclohexane is added to the catalytic oil slurry, and the catalytic oil The solid-liquid ratio of slurry to cyclohexane is 5-10g: 200-300mL. After stirring evenly, add cyclohexane again. The solid-liquid ratio of catalytic oil slurry to cyclohexane is 5-10g: 300- 400mL.

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