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A method of preparing a hierarchical porous carbon material as a supercapacitor electrode material

A supercapacitor, hierarchical porous technology, applied in hybrid capacitor electrodes, carbon preparation/purification, etc., can solve the problems of complex methods, long time-consuming, poor pore-forming effect, etc., achieve simple process, good rectangularity, avoid The effect of de-template process

Inactive Publication Date: 2017-08-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the commonly used method for preparing hierarchical porous carbon materials is the soft / hard template method, but the method is complicated, time-consuming, and the pore-forming effect is not very good.

Method used

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  • A method of preparing a hierarchical porous carbon material as a supercapacitor electrode material
  • A method of preparing a hierarchical porous carbon material as a supercapacitor electrode material

Examples

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Embodiment 1

[0032] Measure 1.4mL of formaldehyde with a mass percentage of 37%, 2mL 0.005g mL -1 Weigh 1g of resorcinol, add distilled water to make 75mL mixed solution, stir evenly, and react at 85°C for 3h to obtain orange-yellow phenolic resin prepolymer (RF) solution; weigh 0.25g of acrylamide, 0.0054g of N,N'-methylenebisacrylamide, prepared as 20mL monomer solution. After mixing the above two solutions evenly, transfer them to a 100mL round-bottomed flask, stir and ventilate nitrogen for 30 minutes to exhaust the oxygen, then add the initiator ammonium persulfate and sodium bisulfite (the amount of both is 1% of the molar amount of acrylamide) 2%) as a redox initiator for acrylamide polymerization, reacted at 30° C. for 12 hours under a nitrogen atmosphere to obtain a light yellow gel, at which time acrylamide self-polymerized in a phenolic resin solution to form polyacrylamide (PAM). The gel was placed in an autoclave at 120° C. for 24 hours, so that the phenolic resin was complet...

Embodiment 2

[0035] Measure 1.4mL of formaldehyde with a mass percentage of 37%, 2mL 0.005g mL -1 Weigh 1g of resorcinol, add distilled water to make 75mL mixed solution, stir evenly, and react at 85°C for 3h to obtain orange-yellow phenolic resin prepolymer (RF) solution; weigh 0.5g of acrylamide, 0.0108g of N,N'-methylenebisacrylamide, prepared as 20mL monomer solution. After the above two solutions were mixed evenly, they were transferred to a 100mL round-bottomed flask, stirred and fed with nitrogen for 30 minutes to exhaust the oxygen, then added ammonium persulfate and sodium bisulfite (the initiator was 2% of the molar weight of the monomer) as propylene The redox initiator for amide polymerization reacts at 30°C for 12 hours under a nitrogen atmosphere to obtain a light yellow gel. At this time, the self-polymerization of acrylamide in the phenolic resin solution is completed to form polyacrylamide (PAM). The gel was placed in an autoclave at 120° C. for 24 hours, so that the phen...

Embodiment 3

[0037] Measure 1.4mL of formaldehyde with a mass percentage of 37%, 2mL 0.005g mL -1 Sodium carbonate solution, weigh 1g resorcinol, add distilled water to prepare 75mL mixed solution, stir evenly, react at 85°C for 3h to obtain orange-yellow phenolic resin prepolymer (RF) solution; weigh 1g acrylamide, 0.0216 g N,N'-methylenebisacrylamide, configured as a 20mL monomer solution. After the above two solutions were mixed evenly, they were transferred to a 100mL round-bottomed flask, stirred and fed with nitrogen for 30 minutes to exhaust the oxygen, then added ammonium persulfate and sodium bisulfite (the initiator was 2% of the molar weight of the monomer) as propylene The redox initiator for amide polymerization reacts at 30°C for 12 hours under a nitrogen atmosphere to obtain a light yellow gel. At this time, the self-polymerization of acrylamide in the phenolic resin solution is completed to form polyacrylamide (PAM). The gel was placed in an autoclave at 120° C. for 24 hou...

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Abstract

The invention relates to a method of preparing a hierarchical porous carbon material as a supercapacitor electrode material. Firstly an RF / PAM interpenetrating polymer network is prepared, and then is mixed with an activating agent that is potassium hydroxide, the mixture is put into a tubular furnace and heated and reacted under inert gas protection, and a product is cooled to obtain the target product that is the hierarchical porous carbon material. Compared with the prior art, the method is novel and simple in process, and when the obtained hierarchical porous carbon material is adopted as a supercapacitor electrode material, and under a current intensity of 1 A g<-1>, the highest specific capacitance can reach 261 F g<-1>, the capacity retention ratio after 10000 times of cyclic charging and discharging is 90.8%, and the specific capacitance can still be 216 F g<-1> under a large current intensity of 20 A g<-1>, and therefore the hierarchical porous carbon material shows a high specific capacitance, excellent rate capacity, and good cycle stability.

Description

technical field [0001] The invention relates to the technical field of preparation of supercapacitor electrode materials, in particular to a method for preparing supercapacitor electrode material graded porous carbon materials. Background technique [0002] Supercapacitors, as a new type of energy storage device between traditional capacitors and rechargeable batteries, have the advantages of high energy density, high power, and long life, and have aroused widespread interest among researchers of electrochemical energy storage devices at home and abroad. And because of its low production cost, low environmental pollution and high safety, it has great practical application value in many fields such as new energy vehicles, portable electronic equipment, memory storage, aviation and military. Among them, the electrode material plays a decisive role in the performance of supercapacitors. Hierarchical porous carbons (HPCs) refer to the structure containing a certain proportion o...

Claims

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Application Information

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IPC IPC(8): C01B32/05C08G8/22C08F220/56C08F222/38H01G11/44
CPCC01P2006/12C01P2006/14C01P2006/16C01P2006/40C08F220/56C08G8/22H01G11/44C08F222/385Y02E60/13
Inventor 朱大章陈婷
Owner TONGJI UNIV
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