CN110364370B - Pyridyl porous carbon material and preparation method and application thereof - Google Patents

Pyridyl porous carbon material and preparation method and application thereof Download PDF

Info

Publication number
CN110364370B
CN110364370B CN201910532460.1A CN201910532460A CN110364370B CN 110364370 B CN110364370 B CN 110364370B CN 201910532460 A CN201910532460 A CN 201910532460A CN 110364370 B CN110364370 B CN 110364370B
Authority
CN
China
Prior art keywords
carbon material
pyridyl
porous carbon
washing
preparation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910532460.1A
Other languages
Chinese (zh)
Other versions
CN110364370A (en
Inventor
廖耀祖
何颜
程中桦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Donghua University
Original Assignee
Donghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Donghua University filed Critical Donghua University
Priority to CN201910532460.1A priority Critical patent/CN110364370B/en
Publication of CN110364370A publication Critical patent/CN110364370A/en
Application granted granted Critical
Publication of CN110364370B publication Critical patent/CN110364370B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/34Carbon-based characterised by carbonisation or activation of carbon
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/44Raw materials therefor, e.g. resins or coal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention relates to a pyridyl porous carbon material and a preparation method and application thereof. The preparation method comprises the following steps: mixing 1,3, 5-triacetyl benzene, aromatic aldehyde and ammonium acetate, reacting under an acidic condition, washing, filtering, drying in vacuum, and pyrolyzing the obtained pyridyl conjugated microporous polymer. The method is simple to operate, large-scale preparation can be realized, and the obtained pyridyl porous carbon material mainly takes micropores and has potential application value in the aspect of supercapacitors.

Description

Pyridyl porous carbon material and preparation method and application thereof
Technical Field
The invention belongs to the field of porous carbon materials and preparation and application thereof, and particularly relates to a pyridyl porous carbon material and a preparation method and application thereof.
Background
The super capacitor is used as a novel electrochemical energy storage device, is between a traditional capacitor and a rechargeable battery, has the advantages of high charging and discharging speed, simple preparation, environmental protection and the like, and becomes an energy device which is widely applied. The energy storage mechanism can be divided into an electric double layer capacitor and a pseudo capacitor, and the electric double layer capacitor and the pseudo capacitor respectively store charges through an electric double layer structure and a redox reaction.
The porous carbon material is a carbon material with different pore structures, has the characteristics of large specific surface area, heat and electricity conduction, high thermal stability and chemical stability and the like, and has important application in a super capacitor as an electrode material. However, the pores with different pore diameters have different effects on electrochemical transmission, so that the specific capacitance of most porous carbon materials is not ideal. It is reported in the literature that micropores, especially ultramicropores, contribute significantly better to electrochemical energy storage than other pores. The conjugated microporous polymer is used as a precursor, so that the porous carbon material with more micropores can be obtained, nitrogen atoms are easily introduced, the pseudo capacitance is increased, and the specific capacitance of the carbon material is favorably improved. However, most of the current conjugated microporous polymers are complex to synthesize, and large-scale synthesis is difficult to realize. For example, Jiang et al synthesized CMP-1 and CMP-1-NH2 using a Pd-catalyzed Sonogashira-Hagohara coupling method, and carbonized these two conjugated microporous polymers as precursors in an atmosphere of N2 or NH3 to obtain different porous carbon Materials (Journal of Materials Chemistry A,2016,4, 7665).
Disclosure of Invention
The invention aims to solve the technical problem of providing a pyridyl porous carbon material, a preparation method and application thereof, so as to overcome the defect of poor specific capacitance of the carbon material in the prior art.
The invention provides a preparation method of a pyridyl porous carbon material, which comprises the following steps:
mixing 1,3, 5-triacetylbenzene, aromatic aldehyde and ammonium acetate, carrying out amine cyclization reaction under an acidic condition, washing, carrying out suction filtration and vacuum drying to obtain a pyridyl conjugated microporous polymer, and then carrying out pyrolysis to obtain the pyridyl porous carbon material, wherein the molar ratio of the aromatic aldehyde containing carbonyl to the 1,3, 5-triacetylbenzene is 1:2-2.2, and the molar ratio of the sum of the ammonium acetate, the 1,3, 5-triacetylbenzene and the aromatic aldehyde containing carbonyl is 5: 1-20: 1.
The aromatic aldehyde is terephthalaldehyde or trimesic aldehyde.
The acidic condition is under acetic acid condition.
The amine cyclization reaction temperature is 110-120 ℃, and the amine cyclization reaction time is 8-12 h.
The washing is as follows: firstly, washing with an alkali solution at room temperature, and then sequentially washing with deionized water and an organic solvent at 55-65 ℃ for 20-26 h.
The alkali solution is 1mol/L ammonia water.
The organic solvent is methanol.
The vacuum drying temperature is 60-80 ℃, and the vacuum drying time is 20-24 h.
The pyrolysis process parameters are as follows: the pyrolysis temperature is 800-1100 ℃ under the argon atmosphere, the pyrolysis time is 1h, and the heating rate is 5 ℃/min.
The invention also provides the pyridyl porous carbon material prepared by the method.
The invention also provides application of the pyridyl porous carbon material prepared by the method in a super capacitor.
Advantageous effects
(1) The invention adopts Chihchibabin amine cyclization reaction principle, does not use pyridyl derivatives as raw materials, can synthesize a large amount of pyridyl conjugated microporous polymers under mild conditions, and further pyrolyzes to obtain the pyridyl porous carbon material. The reaction operation is simple, the large-scale preparation can be realized, and the obtained pyridyl porous carbon material is mainly microporous.
(2) The synthesized pyridyl porous carbon material has potential application value in the aspect of super capacitors as an electrode material.
Drawings
FIG. 1 shows N at 77.4K of the pyridyl-based porous carbon material synthesized in example 12Adsorption-desorption curve of (a);
FIG. 2 is a pore size distribution curve of the pyridyl-based porous carbon material-1 synthesized in example 1 at 77.4K using NLDFT as a calculation method;
FIG. 3 shows the pyridine-based porous carbon material synthesized in example 1, namely, 1 in a three-electrode system and 0.5M H2SO4CV curve in electrolyte;
FIG. 4 shows the pyridine-based porous carbon material synthesized in example 1, namely, 1 in a three-electrode system and 0.5M H2SO4GCD profile in electrolyte;
FIG. 5 shows N at 77.4K of the pyridyl-based porous carbon material synthesized in example 22Adsorption-desorption curve of (a);
FIG. 6 is a pore size distribution curve of the pyridyl-based porous carbon material-1 synthesized in example 1 at 77.4K using NLDFT as a calculation method;
FIG. 7 shows the pyridine-based porous carbon material synthesized in example 2, in a three-electrode system and 0.5M H2SO4CV curve in electrolyte;
FIG. 8 shows the pyridine-based porous carbon material synthesized in example 2, in a three-electrode system and 0.5M H2SO4GCD profile in electrolyte.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Trimesic aldehyde (Shanghai Bide pharmaceutical science and technology Co., Ltd.), p-benzaldehyde, 1,3, 5-triacetylbenzene (Chishieiyi chemical industry development Co., Ltd.), ammonium acetate (national chemical reagent Co., Ltd.), glacial acetic acid (Shanghai Lingfeng chemical reagent Co., Ltd.)
Example 1
Terephthalaldehyde (134.1mg, 1mmol) and 1,3, 5-triacetylbenzene (408.4mg, 2mmol) were mixed and placed in a 100ml round bottom flask, ammonium acetate (2.31g, 30mmol) was added, then 60ml acetic acid was added to dissolve the above mixed powder completely, and finally the mixture was put in a 120 ℃ oil bath and stirred for reaction for 8 hours. And after the reaction is finished, performing suction filtration, firstly stirring and washing for 24 hours at room temperature by using 1mol/L ammonia water, then washing for 24 hours at 60 ℃ by using deionized water and anhydrous methanol respectively, and after the suction filtration, placing in a vacuum oven at 60 ℃ for drying for 24 hours to obtain the pyridyl-containing conjugated microporous polymer. Then, heating the obtained pyridyl conjugated microporous polymer to 1000 ℃ at a heating rate of 5 ℃/min under an argon atmosphere for pyrolysis for 1h, and cooling to room temperature to obtain a pyridyl porous carbon material, namely a carbon material-1, wherein the BET specific surface area of the pyridyl conjugated microporous polymer is 1232m2/g。
Carbon Material 1 obtained in this example has N at 77.4K2The adsorption/desorption curve of (A) is shown in FIG. 1, and an adsorption isotherm is known. In the low relative pressure region (P/P)0<0.001), the gas adsorption rapidly increases, which is due to the function of micropore filling, and shows that a large amount of micropore structures exist in the carbon material-1; in the middle and high relative pressure region (P/P)00.1-1.0), the curve shows a clear plateau and the gas adsorption remains essentially unchanged. Finally, the desorption curve and the adsorption curve are completely closed. FIG. 1 shows the adsorption/desorption curve of carbon Material-1 as a typical microporous adsorption isotherm, demonstrating thatIn which a large number of micropores are present.
The pore size distribution curve of the carbon material-1 obtained in this example at 77.4K by NLDFT is shown in fig. 2, and it is understood that the pore volumes are all contributed by pores having a pore diameter of 2nm or less, and there is substantially no significant fluctuation in pore volume at 2nm or more, which proves that the pores of the carbon material-1 are mainly micropores and a certain amount of ultramicropores exist.
The carbon material-1 obtained in this example was in a three-electrode system and 0.5M H2SO4As shown in FIG. 3, the CV curves in the electrolyte showed different scanning rates (5mV s)-1,10mV s-1,20mV s-1,50mV s-1) An obvious redox peak exists at 0.4-0.5V, which proves that pyridyl exists; as the scan rate increased, the CV curve shifted significantly to the right, as did the redox peaks, again demonstrating the stable presence of pyridine nitrogen in carbon material-1.
The carbon material-1 obtained in this example was in a three-electrode system and 0.5M H2SO4The GCD curve in the electrolyte is shown in figure 4, and the specific capacitance of the carbon material-1 at the current density of 0.1A/g is 297.5F/g which is better than that of the common porous carbon material (the common porous carbon material at the current density of 0.1A/g does not exceed 250F/g), so that the introduction of the pyridyl and the increase of the micropore volume are beneficial to improving the electrochemical energy storage of the carbon material. The specific capacitances at current densities of 0.2, 0.5, 1, 2, 5, 10A/g were 262.2, 233.5, 212.7, 197.6, 177, 157.7F/g, respectively.
Example 2
The procedure of example 1 was repeated except for changing "terephthalaldehyde (134.1mg, 1 mmol)" into "trimesic aldehyde (162.1mg, 1 mmol)" and the like to obtain a pyridyl-based porous carbon material having a BET specific surface area of 1056m, designated as carbon material-2, according to example 12/g。
Carbon Material 2 obtained in this example N at 77.4K2The adsorption/desorption curve of (a) is shown in FIG. 5, and an adsorption isotherm is known. In the low relative pressure region (P/P)0<0.001), the gas adsorption rapidly increases, which is due to the function of micropore filling, and shows that a large amount of micropore structures exist in the carbon material-2; in high and highRelative pressure area (P/P)00.1-1.0), the curve shows a clear plateau and the gas adsorption remains essentially unchanged. Finally, the desorption curve and the adsorption curve are completely closed. Fig. 5 shows the adsorption-desorption curve of carbon material-2 as a typical microporous adsorption isotherm, demonstrating the presence of a large number of micropores therein.
The pore size distribution curve of the carbon material-2 obtained in this example at 77.4K by using NLDFT as a calculation method is shown in fig. 6, and it is understood that the pore volumes are all contributed by pores having a pore diameter of 2nm or less, and that there is substantially no significant fluctuation in pore volume at 2nm or more, which proves that the pores of the carbon material-2 are mainly micropores and a large amount of ultramicropores exist.
The carbon material-2 obtained in this example was in a three-electrode system and 0.5M H2SO4As shown in FIG. 7, the CV curves in the electrolyte showed different scanning rates (5mV s)-1,10mV s-1,20mV s-1,50mV s-1) An obvious redox peak exists at 0.4-0.5V, which proves that pyridyl exists; as the scan rate increased, the CV curve shifted significantly to the right, as did the redox peaks, again demonstrating the stable presence of pyridine nitrogen in carbon material-2.
The carbon material-2 obtained in this example was in a three-electrode system and 0.5M H2SO4The GCD curve in the electrolyte is shown in FIG. 8, and the specific capacitance of the carbon material-2 is 324F/g under the current density of 0.1A/g, which is obviously superior to that of the common porous carbon material, so that the introduction of the pyridyl and the increase of the micropore volume are beneficial to improving the electrochemical energy storage of the carbon material. The specific capacitance at current densities of 0.2, 0.5, 1, 2, 5, 10A/g were 282, 239.5, 226, 212.6, 196, 182.4F/g, respectively.
Comparative example 1
1,3, 5-Triethynylbenzene (300mg,2.0mmol), 1, 4-diiodobenzene (660mg,2.0mmol), tetrakis (triphenylphosphine) palladium (100mg) and copper iodide (30mg) were dissolved in a mixture of toluene (2.5mL) and triethylamine (2.5mL), heated to 80 ℃ under a nitrogen atmosphere and stirred for 72 h. Cooling the mixture to room temperature, filtering, sequentially washing with chloroform, water, methanol and acetone, performing Soxhlet extraction with methanol as solvent for 48 hr, vacuum filtering, and collecting the productVacuum drying at 70 deg.c for 24 hr to obtain the conjugated microporous polymer CMP-1. And then heating the CMP-1 to 800 ℃ at the heating rate of 5 ℃/min under the nitrogen atmosphere for pyrolysis for 2h, and cooling to room temperature to obtain the porous carbon material C1-CMP-1. Then in NH3Heating the C1-CMP-1 to 800 ℃ at the heating rate of 5 ℃/min under the atmosphere for pyrolysis for 2h to obtain the nitrogen-containing porous carbon material N3-CMP-1, wherein the BET specific surface area of the nitrogen-containing porous carbon material N3-CMP-1 is 1436m2(ii) in terms of/g. In a three-electrode system and 1M H2SO4The specific capacitance of the electrolyte measured by using N3-CMP-1 as an electrode material at a current density of 0.1A/g is 175.3F/g.

Claims (7)

1. A preparation method of a pyridyl porous carbon material comprises the following steps:
mixing 1,3, 5-triacetylbenzene, aromatic aldehyde and ammonium acetate, carrying out amine cyclization reaction under an acidic condition, washing, carrying out suction filtration and vacuum drying to obtain a pyridyl conjugated microporous polymer, and then carrying out pyrolysis to obtain the pyridyl porous carbon material, wherein the molar ratio of the aromatic aldehyde to the 1,3, 5-triacetylbenzene is 1:2-2.2, the molar ratio of the ammonium acetate to the sum of the 1,3, 5-triacetylbenzene and the aromatic aldehyde containing carbonyl is 5: 1-20: 1, and the aromatic aldehyde is terephthalaldehyde or trimesic aldehyde.
2. The method of claim 1, wherein the acidic conditions are under acetic acid conditions.
3. The method according to claim 1, wherein the amine cyclization reaction temperature is 110-120 ℃ and the amine cyclization reaction time is 8-12 h.
4. The method of claim 1, wherein the washing is: firstly, washing with an alkali solution at room temperature, and then sequentially washing with deionized water and an organic solvent at 55-65 ℃ for 20-26 h.
5. The method of claim 1, wherein the pyrolysis process parameters are: the pyrolysis temperature is 800-1100 ℃ under the argon atmosphere, the pyrolysis time is 1h, and the heating rate is 5 ℃/min.
6. A pyridyl porous carbon material prepared by the method of claim 1.
7. The application of the pyridyl porous carbon material prepared by the method in claim 1 in a super capacitor.
CN201910532460.1A 2019-06-19 2019-06-19 Pyridyl porous carbon material and preparation method and application thereof Active CN110364370B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910532460.1A CN110364370B (en) 2019-06-19 2019-06-19 Pyridyl porous carbon material and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910532460.1A CN110364370B (en) 2019-06-19 2019-06-19 Pyridyl porous carbon material and preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN110364370A CN110364370A (en) 2019-10-22
CN110364370B true CN110364370B (en) 2021-05-11

Family

ID=68216413

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910532460.1A Active CN110364370B (en) 2019-06-19 2019-06-19 Pyridyl porous carbon material and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN110364370B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111269417B (en) * 2019-11-26 2023-05-02 镇江猎盾特种材料有限公司 Pyridyl-containing conjugated microporous polymer and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104177576A (en) * 2014-08-12 2014-12-03 吉林大学 Imino organic porous polymer framework material and preparation method thereof
CN104495791A (en) * 2015-01-06 2015-04-08 日照格鲁博新材料科技有限公司 Preparation method of porous carbon
CN107871615A (en) * 2016-09-27 2018-04-03 国家纳米科学中心 A kind of porous carbon nanomaterial and its production and use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104177576A (en) * 2014-08-12 2014-12-03 吉林大学 Imino organic porous polymer framework material and preparation method thereof
CN104495791A (en) * 2015-01-06 2015-04-08 日照格鲁博新材料科技有限公司 Preparation method of porous carbon
CN107871615A (en) * 2016-09-27 2018-04-03 国家纳米科学中心 A kind of porous carbon nanomaterial and its production and use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Acetic acid-ammonium acetate reactions. An improved chichibabin pyridine synthesis";Weiss M;《Journal of the American Chemical Society》;19521231;第74卷;第200-202页 *

Also Published As

Publication number Publication date
CN110364370A (en) 2019-10-22

Similar Documents

Publication Publication Date Title
Jain et al. Mesoporous activated carbons with enhanced porosity by optimal hydrothermal pre-treatment of biomass for supercapacitor applications
CN109087814B (en) In-situ nitrogen-doped porous carbon nanofiber electrode material and macro preparation method and application thereof
CN108238596B (en) Doped carbon aerogel material and preparation method and application thereof
CN110323072B (en) Preparation method of nitrogen-doped hollow carbon sphere/MOF-based porous carbon composite material applied to supercapacitor
CN113955756B (en) Carbonized amino acid modified lignin and preparation method thereof
CN108565129B (en) Preparation method of carbon nanotube/boron-nitrogen co-doped porous carbon composite material
CN109942814B (en) Pyridyl-containing conjugated microporous polymer and preparation method and application thereof
Pourjavadi et al. Novel synthesis route for preparation of porous nitrogen-doped carbons from lignocellulosic wastes for high performance supercapacitors
CN104803382A (en) Preparation method of activated carbon
Cai et al. Phenol–formaldehyde carbon with ordered/disordered bimodal mesoporous structure as high-performance electrode materials for supercapacitors
Wang et al. Novel activated N-doped hollow microporous carbon nanospheres from pyrrole-based hyper-crosslinking polystyrene for supercapacitors
CN112357900B (en) High-density nitrogen, oxygen and chlorine co-doped carbon particle material, and preparation method and application thereof
CN111939878A (en) Ternary composite aerogel and preparation method and application thereof
CN110364370B (en) Pyridyl porous carbon material and preparation method and application thereof
Liu et al. Modulating pore nanostructure coupled with N/O doping towards competitive coal tar pitch-based carbon cathode for aqueous Zn-ion storage
Liu et al. Pre‐Oxidating and Pre‐Carbonizing to Regulate the Composition and Structure of Coal Tar Pitch: The Fabrication of Porous Carbon for Supercapacitor Applications
CN111430153B (en) Carbon nano aerogel material for all-solid-state supercapacitor and preparation method and application thereof
KR101478139B1 (en) Manufacturing method of activated carbons
CHEN et al. Synthesis of nitrogen doped porous carbons from sodium carboxymethyl cellulose and the capacitive performance
CN112194113A (en) Morphology-controllable carbon material based on porous aromatic skeleton and preparation method and application thereof
CN111547719A (en) 3D porous carbon material and preparation method and application thereof
CN113120897B (en) Method for preparing nitrogen-doped microporous carbon electrode material by solvent-free method
Zhou et al. RETRACTED: Carbonization-dependent nitrogen-doped hollow porous carbon nanospheres synthesis and electrochemical study for supercapacitors
CN113299488A (en) Porous carbon material based on nitrogen-rich covalent organic framework structure and preparation method and application thereof
CN111484614A (en) Preparation method of supercapacitor electrode material

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant