CN112707398A - Method for preparing coal-based porous carbon, electrode material and supercapacitor - Google Patents
Method for preparing coal-based porous carbon, electrode material and supercapacitor Download PDFInfo
- Publication number
- CN112707398A CN112707398A CN201911022242.XA CN201911022242A CN112707398A CN 112707398 A CN112707398 A CN 112707398A CN 201911022242 A CN201911022242 A CN 201911022242A CN 112707398 A CN112707398 A CN 112707398A
- Authority
- CN
- China
- Prior art keywords
- coal
- porous carbon
- based porous
- promoter
- raw material
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/44—Raw materials therefor, e.g. resins or coal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention provides a method for preparing coal-based porous carbon, an electrode material and a super capacitor. The method comprises the following steps: (1) preparing a raw material mixture, wherein the raw material mixture comprises coal powder, a microcrystalline promoter and a chemical active agent; (2) and (3) carrying out activation treatment on the raw material mixture to obtain the coal-based porous carbon. According to the preparation method provided by the invention, the microcrystal promoter is added in the physical-chemical coupling activation method, so that the coal-based porous carbon with a high specific surface area can be obtained, the graphite microcrystal size in the porous carbon structure and the orderliness of the porous carbon structure can be improved, the electrochemical performance of the supercapacitor can be improved, and the preparation method is low in cost, simple in process, high in yield and has the potential of industrialization.
Description
Technical Field
The invention relates to the technical field of porous carbon materials, in particular to a method for preparing coal-based porous carbon, an electrode material and a super capacitor.
Background
The super capacitor is a novel energy storage device between a traditional capacitor and a rechargeable battery, has the characteristics of quick charge and discharge of the capacitor and the energy storage characteristic of the battery, and is an important energy storage and conversion device for realizing clean and efficient utilization of new energy. The porous carbon is an important electrode material of the supercapacitor, the electrochemical performance of the supercapacitor is mainly determined by the pore structure and the microcrystalline structure of the electrode material, and the electrode material with developed pores, high specific surface area and high graphitization degree is beneficial to exerting the performance of the supercapacitor.
Coal is an important energy resource in China due to abundant reserves and low price. In conventional applications, coal is used as a fuel to convert chemical energy stored in the coal into heat energy by combustion. However, from the molecular perspective, coal is a complex carbon-based molecule consisting of an aromatic structure (graphite microcrystalline structure) and an aliphatic structure which are connected by chemical bridges, has high carbon density, and is a carbon structure treasury formed by the evolution of millions of years. The characteristics of aromatic structure, high carbon content and low price of coal determine that coal materials can be used as carbon sources for preparing high-value carbon materials. The coal-based porous carbon is one of important products of coal-based carbon materials, and is widely applied to the fields of catalysis, energy storage, gas phase/liquid phase pollutant removal, magnetic materials and the like.
The activation method is a main method for preparing a coal-based porous carbon material, and is specifically classified into a physical activation method, a chemical activation method, and a physicochemical coupling activation method. Wherein the physical activation method uses CO2、H2Weak oxidizing gas such as OCarrying out mild oxidation on the carbon source at high temperature, and selectively removing some structures in the carbon source so as to realize the pore-forming process; the chemical activation method realizes pore-forming on the carbon source by the interaction of the chemical reagent and the carbon source at high temperature. Chemical activation has a higher carbon yield and a higher specific surface area than physical activation with low yield and less developed pores.
Disclosure of Invention
The present invention has been completed based on the following findings of the inventors:
in the research process, the inventor of the invention finds that the porous carbon is an important electrode material of a supercapacitor, and the specific surface area and the graphite microcrystalline structure of the porous carbon determine the electrochemical performance of the supercapacitor, so that the invention provides a method for preparing the microcrystalline coal-based porous carbon based on coupling of catalysis and chemical activation. Specifically, the preparation of the coal-based porous activated carbon with high specific surface area and high graphitization degree can be realized by controlling the proportion of the coal powder, the microcrystalline promoter and the activator, the activation temperature, the activation time and other parameters, so that the electrochemical performance of the supercapacitor is improved.
In a first aspect of the invention, a method of making a coal-based porous carbon is presented.
According to an embodiment of the invention, the method comprises: (1) preparing a raw material mixture, wherein the raw material mixture comprises coal powder, a microcrystalline promoter and a chemical active agent; (2) and carrying out activation treatment on the raw material mixture to obtain the coal-based porous carbon.
The inventor finds that by adopting the preparation method provided by the embodiment of the invention and adding the microcrystalline promoter in the physical-chemical coupling activation method, the coal-based porous carbon with high specific surface area can be obtained, and the graphite microcrystalline size in the porous carbon structure and the orderliness of the porous carbon structure can be improved, so that the electrochemical performance of the supercapacitor can be improved.
In addition, the preparation method according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the microcrystalline promoter comprises at least one of an iron salt, a copper salt and a nickel salt.
According to an embodiment of the invention, the iron salt is ferrous dichloride, ferrous trichloride, ferrous nitrate or ferric nitrate.
According to an embodiment of the invention, the copper salt is copper chloride or copper nitrate.
According to an embodiment of the invention, the chemical active agent is potassium hydroxide.
According to the embodiment of the invention, the mass ratio of the coal powder, the microcrystalline promoter and the chemical active agent is 1: (0.1-1): (2-6).
According to the embodiment of the invention, the activation treatment is carried out by heating at 600-1000 ℃ for 0.5-4 hours in an inert gas.
According to an embodiment of the present invention, the preparation method further comprises:
(3) and washing and drying the coal-based porous carbon after the activation treatment, wherein the reagent for washing is at least one of hydrochloric acid, hydrofluoric acid and ferric chloride, the washing is carried out for 8-24 hours at 20-60 ℃, and the drying is carried out for 6-12 hours at 60-240 ℃.
In a second aspect of the invention, an electrode material is presented.
According to an embodiment of the present invention, the electrode material is prepared by the above method.
The inventor researches to find that the electrode material of the embodiment of the invention has the advantages that the specific surface area of porous carbon is higher, the graphitization degree is higher, and the porous carbon is microcrystallized, so that the electrochemical performance of a super capacitor containing the electrode material is better. It will be appreciated by those skilled in the art that the features and advantages described above with respect to the method of preparing coal-based porous carbon, are still applicable to the electrode material and will not be described in further detail herein.
In a third aspect of the invention, a supercapacitor is presented.
According to an embodiment of the invention, the supercapacitor comprises a positive electrode, a negative electrode, a porous separator and an electrolyte, wherein the material forming at least one of the positive electrode and the negative electrode comprises the electrode material described above.
The inventor researches to find that the specific surface area of the electrode material of the positive electrode or the negative electrode of the super capacitor is higher, the graphitization degree is higher, and therefore the electrochemical performance of the super capacitor is better. It will be appreciated by those skilled in the art that the features and advantages described above for the electrode material are still applicable to the supercapacitor and will not be described in detail here.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing aspects of the invention are explained in the description of the embodiments with reference to the following drawings, in which:
FIG. 1 is a schematic flow diagram of a method of preparing coal-based porous carbon in accordance with one embodiment of the present invention;
FIG. 2 is a nitrogen adsorption isotherm for two embodiments of the present invention;
FIG. 3 is a plot of pore size distribution for two embodiments of the present invention;
FIG. 4 is a Raman plot of three embodiments of the present invention;
FIG. 5 is an XRD pattern of three embodiments of the present invention;
fig. 6 is a graph of conductivity measurements for three embodiments of the present invention.
Detailed Description
The following examples of the present invention are described in detail, and it will be understood by those skilled in the art that the following examples are intended to illustrate the present invention, but should not be construed as limiting the present invention. Unless otherwise indicated, specific techniques or conditions are not explicitly described in the following examples, and those skilled in the art may follow techniques or conditions commonly employed in the art or in accordance with the product specifications.
In one aspect of the invention, a method of making a coal-based porous carbon is presented. According to an embodiment of the present invention, referring to fig. 1, the preparation method includes:
s100: preparing a raw material mixture, wherein the raw material mixture comprises coal powder, a microcrystalline promoter and a chemical active agent.
In the step, coal powder A, a microcrystalline promoter B, a chemical active agent C and the like are prepared into a raw material mixture, and specifically, the raw material mixture can be fully mixed in a liquid-phase stirring mixing mode, a solid-phase grinding mixing mode or a liquid-phase ultrasonic dispersion mixing mode; wherein the stirring speed of the liquid phase stirring and mixing is 200-1000 revolutions per minute, the heating temperature is 50-100 ℃ and the time is 1-10 hours, the stirring speed of the solid phase grinding and mixing is 60-200 revolutions per minute and the time is 10-180 minutes, and the ultrasonic power of the liquid phase ultrasonic dispersion and mixing is 50-200W and the time is 10-180 minutes.
According to the embodiment of the invention, the chemical activator C can be potassium hydroxide (KOH), so that KOH can realize a pore-forming process through strong oxidation, and the porous carbon material prepared by using KOH as an activator has a developed pore structure and a specific surface area of 2800m2More than g and has higher micropore volume. However, the inventor finds in the research process that the carbon material prepared by KOH activation is in a highly disordered state, the crystallite size of the carbon material is still small, and although KOH has strong oxidizing capability, the amount of generated elemental potassium is limited, so that coal powder cannot easily form coal with a graphite crystallite structure with larger size, better orderliness and better quality under the single action of KOH. Therefore, the inventor further adds a microcrystalline promoter B into the raw material mixture consisting of the coal powder a and the chemical active agent C, so that under the combined action of the microcrystalline promoter B and the chemical active agent C, the microcrystalline promoter B also has a positive effect on the growth and development of the microcrystals in the carbon material structure, and the growth of the graphite microcrystals is further promoted while the non-graphitizable microcrystals are removed.
In some embodiments of the invention, the microcrystalline promoter B may comprise at least one of an iron, copper and nickel salt, such that the activator C reacts with carbon (6KOH +2C → 2K + 3H)2+2K2CO3) The purpose of pore-forming can be achieved, simple substance potassium is generated in the reaction product, and the simple substance potassium and the microcrystalline promoter B are subjected to displacement reaction to carry out micro-pore formingThe metal in the crystal promoter B is replaced to form simple substance iron or copper, and the simple substance iron or copper has a catalytic action on graphitization, so that the simple substance iron or copper can become a crystal nucleus of a graphite structure, and further the graphite microcrystal structure in the porous carbon material can grow larger and has better order. In some specific examples, the microcrystalline promoter B may be selected from iron salts, and the iron salt may be ferrous dichloride (FeCl)2) FeCl, and ferric chloride3) Ferrous nitrate (Fe (NO)3)2) Or ferric nitrate (Fe (NO)3)3) Thus, the specific surface area of the coal-based porous carbon can be made higher. In other embodiments, the microcrystalline promoter B may also be selected from copper salts, and the copper salt may be copper chloride (CuCl)2) Or copper nitrate (Cu (NO)3)2) Therefore, the graphite structure microcrystal of the coal-based porous carbon can be refined and normalized, and the conductivity of the porous carbon is better.
In some embodiments of the present invention, the mass ratio of the pulverized coal a, the microcrystalline promoter B, and the chemical active agent C may be 1: (0.1-1): (2-6), and thus, by adopting the raw material mixture composed according to the proportion, the coal-based porous activated carbon with higher specific surface area and higher graphitization degree can be obtained through subsequent activation treatment.
According to the embodiment of the invention, the pulverized coal A can be prepared by crushing at least one of anthracite, bituminous coal, sub-bituminous coal and lignite into particles with the particle size of 0.1-250 micrometers, such as 150-micrometer eastern Junggar coal, so that the efficiency and the conversion rate of subsequent activation treatment are conveniently improved.
S200: and (3) carrying out activation treatment on the raw material mixture to obtain the coal-based porous carbon.
In this step, the raw material mixture mixed in step S100 is subjected to an activation treatment, and specifically, the raw material mixture may be transferred to a crucible and subjected to a high temperature treatment in a high temperature furnace, so that the porous carbon formed after carbonization can be used as a skeleton and a support of an electrode material.
The specific process parameters of the activation process, according to the embodiments of the present invention, can be designed and selected by those skilled in the art according to the specific types of the microcrystalline promoter B and the chemical active agent C in the raw material mixture. In some embodiments of the present invention, the activation treatment may be heating at 600-1000 ℃ for 0.5-4 hours in an inert gas, specifically, heating to 900 ℃ in nitrogen, argon or helium, and holding for 1 hour, etc., so that the coal powder is completely converted into porous carbon, thereby increasing the efficiency and conversion rate of the activation treatment.
In some specific examples, after step S200, the preparation method may further include:
s300: and washing and drying the activated coal-based porous carbon.
In the step, the activated coal-based porous carbon can be further washed and dried, wherein the washing reagent can be at least one of hydrochloric acid, hydrofluoric acid and ferric chloride, the washing is carried out at 20-60 ℃ for 8-24 hours, and the drying is carried out at 60-240 ℃ for 6-12 hours. Thus, the coal-based porous activated carbon powder which is used for manufacturing the electrode material of the super capacitor and has higher specific surface area and higher graphitization degree can be obtained.
In summary, according to the embodiments of the present invention, the invention provides a preparation method, wherein a microcrystal promoter is added in a physicochemical coupling activation method, so that not only can coal-based porous carbon with a high specific surface area be obtained, but also the graphite microcrystal size in a porous carbon structure and the orderliness of the porous carbon structure can be improved, so that the electrochemical performance of a supercapacitor can be improved, and the preparation method has the advantages of low cost, simple process, high yield and industrialization potential.
In another aspect of the invention, an electrode material is provided. According to an embodiment of the present invention, an electrode material is prepared by the above method.
In summary, according to the embodiments of the present invention, the present invention provides an electrode material, which has a porous carbon with a higher specific surface area and a higher graphitization degree and is microcrystallized, so that a supercapacitor containing the electrode material has better electrochemical performance. It will be appreciated by those skilled in the art that the features and advantages described above with respect to the method of preparing coal-based porous carbon, are still applicable to the electrode material and will not be described in further detail herein.
In another aspect of the invention, a supercapacitor is presented.
According to an embodiment of the present invention, a supercapacitor comprises a positive electrode, a negative electrode, a porous separator and an electrolyte, wherein a material forming at least one of the positive electrode and the negative electrode comprises the above-mentioned electrode material.
In summary, according to the embodiments of the present invention, the present invention provides a supercapacitor, in which the specific surface area of the electrode material of the positive electrode or the negative electrode is higher and the graphitization degree is higher, so that the electrochemical performance of the supercapacitor is better. It will be appreciated by those skilled in the art that the features and advantages described above for the electrode material are still applicable to the supercapacitor and will not be described in detail here.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
In this example, a coal-based porous carbon (ZD-CuCl) was prepared2-KOH). Wherein, the east China coal is used as a raw material, the production place is the east China area of Xinjiang, and the results of the industrial analysis and the elemental analysis of the raw material are Mar＝11.79、Ad＝3.68、Vd＝32.70、FCd＝56.64；Cdaf＝73.52、Hdaf＝6.55、Odaf*＝18.51、Ndaf0.91 and Sdaf0.51, where the lower subscript ar denotes the received base, d denotes the dry base, daf denotes the dry ashless base, and the upper subscript is calculated by subtraction. The preparation method comprises the following specific steps:
(1) mixing 3g of 150-micron powder of eastern Juniper coal, 3.1g of copper chloride dihydrate and 9g of potassium hydroxide in 50mL of deionized water, and stirring and evaporating the mixed solution on a magnetic stirrer with the heating temperature of 80 ℃ to dryness at the stirring speed of 500 revolutions per minute;
(2) transferring the dried raw material mixture into a nickel crucible, flatly placing the nickel crucible in a tubular furnace, heating the nickel crucible to 900 ℃ at a heating rate of 5 ℃/min in a nitrogen atmosphere, and keeping the temperature for 1h, wherein the flow rate is 200 mL/min;
(3) and after naturally cooling to room temperature, washing for 12h by using 2M hydrochloric acid solution, washing by using deionized water until the solution is clear, and finally drying for 12h at 80 ℃ to obtain the coal-based porous carbon.
The coal-based porous carbon (ZD-CuCl) prepared in this example2KOH) with a nitrogen adsorption isotherm as shown in figure 2, a pore distribution as shown in figure 3, a raman profile as shown in figure 4, an XRD profile as shown in figure 5 and a conductivity profile as shown in figure 6. As can be seen from FIG. 4, the Raman spectrum appeared at a wavenumber of 2700cm-1Characteristic peaks of graphite or graphene on the left and right. As can be seen from FIG. 5, the microcrystalline promoter was selected from copper chloride, coal-based porous carbon (ZD-CuCl)2-KOH) has a larger size and better ordering of the graphite crystallites. As seen from FIG. 6, coal-based porous carbon (ZD-CuCl)2-KOH) is better.
Example 2
In this example, coal-based porous carbon (ZD-FeCl) was prepared according to substantially the same method and conditions as in example 13-KOH). The difference is that in this embodiment: (1) mixing 3g of 150-micron-sized powder of eastern Junggar coal, 1.57g of ferric chloride tetrahydrate and 9g of potassium hydroxide in 50mL of deionized water; the other steps and conditions were the same.
The coal-based porous carbon (ZD-FeCl) prepared in this example3KOH) with a nitrogen adsorption isotherm as shown in figure 2, a pore distribution as shown in figure 3, a raman profile as shown in figure 4, an XRD profile as shown in figure 5 and a conductivity profile as shown in figure 6. As can be seen from FIG. 2, the microcrystalline promoter is selected from ferric chloride, coal-based porous carbon (ZD-FeCl)3KOH) has stronger adsorption capacity and higher specific surface area. As can be seen from FIG. 4, the Raman spectrum appeared at a wavenumber of 2700cm-1Characteristic peaks of graphite or graphene on the left and right. As can be seen from FIG. 5, coal-based porous carbon (ZD-FeCl)3KOH) the sharp peaks appearing around 26 ° represent graphitized crystallite structures. As seen from FIG. 6, coal-based porous carbon (ZD-FeCl)3KOH) is preferred.
Comparative example 1
In this comparative example, a coal-based porous carbon (ZD-KOH) was prepared according to substantially the same method and conditions as in example 1. The difference is that in this comparative example, no microcrystalline promoter of any kind is added to the raw material mixture, i.e.: (1) mixing 3g of 150-micron-sized powder coal in the east China and 9g of potassium hydroxide in 50mL of deionized water; the other steps and conditions were the same.
The raman curve, the XRD curve and the conductivity curve of the coal-based porous carbon (ZD-KOH) prepared in this example are shown in fig. 4, fig. 5 and 6, respectively. From fig. 6, it is seen that the conductivity of the coal-based porous carbon (ZD-KOH) is the worst.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of making a coal-based porous carbon, comprising:
(1) preparing a raw material mixture, wherein the raw material mixture comprises coal powder, a microcrystalline promoter and a chemical active agent;
(2) and carrying out activation treatment on the raw material mixture to obtain the coal-based porous carbon.
2. The method of claim 1, wherein the microcrystalline promoter comprises at least one of an iron salt, a copper salt, and a nickel salt.
3. The method of claim 2, wherein the iron salt is ferrous dichloride, ferrous trichloride, ferrous nitrate, or ferric nitrate.
4. The method of claim 2, wherein the copper salt is copper chloride or copper nitrate.
5. The method of claim 1, wherein the chemical active is potassium hydroxide.
6. The method of claim 1, wherein the mass ratio of the coal fines, the microcrystalline promoter, and the chemical active agent is 1: (0.1-1): (2-6).
7. The method according to claim 1, wherein the activation treatment is heating at 600 to 1000 ℃ for 0.5 to 4 hours in an inert gas.
8. The method of claim 1, further comprising:
(3) and washing and drying the coal-based porous carbon after the activation treatment, wherein the reagent for washing is at least one of hydrochloric acid, hydrofluoric acid and ferric chloride, the washing is carried out for 8-24 hours at 20-60 ℃, and the drying is carried out for 6-12 hours at 60-240 ℃.
9. An electrode material prepared by the method of any one of claims 1 to 8.
10. An ultracapacitor comprising a positive electrode, a negative electrode, a porous separator and an electrolyte, wherein a material forming at least one of the positive electrode and the negative electrode comprises the electrode material of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022242.XA CN112707398A (en) | 2019-10-25 | 2019-10-25 | Method for preparing coal-based porous carbon, electrode material and supercapacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022242.XA CN112707398A (en) | 2019-10-25 | 2019-10-25 | Method for preparing coal-based porous carbon, electrode material and supercapacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112707398A true CN112707398A (en) | 2021-04-27 |
Family
ID=75541432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911022242.XA Pending CN112707398A (en) | 2019-10-25 | 2019-10-25 | Method for preparing coal-based porous carbon, electrode material and supercapacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112707398A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114768765A (en) * | 2022-05-12 | 2022-07-22 | 太原理工大学 | Preparation method of brown coal-based magnetic activated carbon and wastewater treatment method |
| CN115520863A (en) * | 2022-11-04 | 2022-12-27 | 合肥工业大学 | Coal-based activated carbon prepared by hydrothermal or solvothermal method and preparation method and application thereof |
| CN115626644A (en) * | 2022-11-04 | 2023-01-20 | 合肥工业大学 | Briquetting activated carbon containing nano iron and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6899970B1 (en) * | 2001-06-25 | 2005-05-31 | Touchstone Research Laboratory, Ltd. | Electrochemical cell electrodes comprising coal-based carbon foam |
| CN104016330A (en) * | 2014-05-17 | 2014-09-03 | 西安科技大学 | Graphitization processing method for soft coal and coal-rock compositions thereof |
| CN110330016A (en) * | 2019-08-10 | 2019-10-15 | 哈尔滨工业大学 | An a kind of step cooperative development method of anthracite-base porous carbon graphite microcrystal and hole |
-
2019
- 2019-10-25 CN CN201911022242.XA patent/CN112707398A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6899970B1 (en) * | 2001-06-25 | 2005-05-31 | Touchstone Research Laboratory, Ltd. | Electrochemical cell electrodes comprising coal-based carbon foam |
| CN104016330A (en) * | 2014-05-17 | 2014-09-03 | 西安科技大学 | Graphitization processing method for soft coal and coal-rock compositions thereof |
| CN110330016A (en) * | 2019-08-10 | 2019-10-15 | 哈尔滨工业大学 | An a kind of step cooperative development method of anthracite-base porous carbon graphite microcrystal and hole |
Non-Patent Citations (1)
| Title |
|---|
| 连芳: "《电化学储能器件及关键材料》", 31 July 2019, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114768765A (en) * | 2022-05-12 | 2022-07-22 | 太原理工大学 | Preparation method of brown coal-based magnetic activated carbon and wastewater treatment method |
| CN115520863A (en) * | 2022-11-04 | 2022-12-27 | 合肥工业大学 | Coal-based activated carbon prepared by hydrothermal or solvothermal method and preparation method and application thereof |
| CN115626644A (en) * | 2022-11-04 | 2023-01-20 | 合肥工业大学 | Briquetting activated carbon containing nano iron and preparation method and application thereof |
| CN115520863B (en) * | 2022-11-04 | 2023-11-21 | 合肥工业大学 | Coal-based activated carbon prepared by hydrothermal or solvothermal method and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6682557B2 (en) | Method for preparing graphene from coal | |
| Gao et al. | A cross-disciplinary overview of naturally derived materials for electrochemical energy storage | |
| CN108328706B (en) | Preparation and application of MOF-derived porous carbon/graphene composite electrode material | |
| CN110853937A (en) | Preparation method of nickel-cobalt bimetallic selenide/carbon composite for supercapacitor | |
| CN112707398A (en) | Method for preparing coal-based porous carbon, electrode material and supercapacitor | |
| Xu et al. | In situ construction of hierarchical Co/MnO@ graphite carbon composites for highly supercapacitive and OER electrocatalytic performances | |
| Shin et al. | Porosity tailoring of the Zn-MOF-5 derived carbon materials and its effects on the performance as a cathode for lithium-air batteries | |
| CN111285347B (en) | Three-dimensional graphitized porous carbon material and preparation method and application thereof | |
| CN111710860B (en) | Nitrogen-phosphorus co-doped carbon composite material modified by cobalt-molybdenum phosphide particles and preparation method and application thereof | |
| Sharma et al. | All-solid-state asymmetric supercapacitor with MWCNT-based hollow NiCo2O4 positive electrode and porous Cu2WS4 negative electrode | |
| KR101630933B1 (en) | Method of preparing heteroatom-doped carbon materials using flue gas comprising carbon dioxide | |
| CN102583561A (en) | Alpha-phase manganese dioxide nano-rod, and preparation method and application thereof | |
| US20230216027A1 (en) | Immobilized selenium in a porous carbon with the presence of oxygen, a method of making, and uses of immobilized selenium in a rechargeable battery | |
| CN113307254A (en) | Method for preparing three-dimensional porous graphene sheet by using low-temperature double-salt compound and application | |
| JP4576374B2 (en) | Activated carbon, its production method and its use | |
| Lal et al. | Multifunctional high entropy oxides incorporated functionalized biowaste derived activated carbon for electrochemical energy storage and desalination | |
| CN114890420A (en) | Preparation method of coal-based novel porous carbon electrode material | |
| CN106430144A (en) | Method for preparing asphalt-based hierarchical porous carbon sheet based on sheet-shaped magnesium oxide template and application thereof | |
| CN110697708A (en) | Nitrogen-doped porous carbon material for lithium ion capacitor and efficient preparation method of low-temperature co-molten solvent activated biomass waste of nitrogen-doped porous carbon material | |
| Mohamed et al. | A comparison of the electrochemical performance of graphitized coal prepared by high-temperature heating and flash Joule heating as an anode material for lithium and potassium ion batteries | |
| Yan et al. | Waste to wealth: direct utilization of spent materials for electrocatalysis and energy storage | |
| CN110690054B (en) | Preparation method of atomic-level dispersed zinc carbon nitrogen material for super capacitor | |
| CN109970056B (en) | Preparation method and application of biomass-based ordered microporous carbon material | |
| CN114291806B (en) | Multi-scale regulation and control method for graphitization degree of low-order coal-based porous carbon | |
| Nanzumani et al. | Molten salt synthesis of nitrogen-doped hierarchical porous carbon from plantain peels for high-performance supercapacitor |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210427 |