Methods of making porous carbon structures having increased surface area and total pore volume and porous carbon structures made using the methods

Abstract

Disclosed is a method of preparing a porous carbon structure capable of significantly increasing the surface area and total pore volume of the porous carbon structure; and a porous carbon structure prepared using the method. The method of the present invention includes the steps of: preparing a template having a mesoporous shell; injecting a carbon precursor into the template, the carbon precursor including a polymer precursor and a crosslinking agent, the polymer precursor including a first component having a halogen functional group and a second component having no halogen functional group, and the content of the first component in the polymer precursor being 20 to 80% by weight; polymerizing the polymer precursor to form a polymer; carbonizing the polymer to obtain a template-carbon composite; and removing the template from the template-carbon composite.

Description

Technical Field

[0001] This disclosure relates to a method for manufacturing a porous carbon structure having increased surface area and total pore volume, and a porous carbon structure manufactured using this method, and more specifically, to a method for manufacturing a porous carbon structure capable of significantly increasing the surface area and total pore volume of the porous carbon structure, and a porous carbon structure manufactured using this method. Background Technology

[0002] Due to their high surface area, high pore volume, excellent electrical conductivity, and excellent chemical stability, porous carbon structures have been used in a variety of technological fields, including (i) the field of adsorbents and (ii) the field of electrochemistry, including fuel cells, secondary batteries, and capacitors.

[0003] To precisely control the microstructure of porous carbon structures and further increase their surface area and total pore volume, templates are typically used to fabricate porous carbon structures. For example, a carbon precursor (e.g., a monomer) is injected into a template comprising spherical inorganic particles and a mesoporous shell formed thereon, followed by polymerization and carbonization to prepare a template-carbon composite. The template is then removed from the template-carbon composite to create a hollow porous carbon structure.

[0004] However, the surface area and total pore volume of porous carbon structures manufactured by conventional methods are insufficient to meet industrial requirements (e.g., 2,000 m²). 2 BET surface area above / g and 2.0cm 3 Total pore volume of / g or more).

[0005] Furthermore, the required BET surface area and total pore volume levels for porous carbon structures are increasing in several technological fields. Summary of the Invention

[0006] Technical issues

[0007] Therefore, this disclosure relates to a method for manufacturing a porous carbon structure with increased surface area and total pore volume, and the porous carbon structure manufactured using this method, which can prevent problems caused by the limitations and disadvantages of related technologies.

[0008] One aspect of this disclosure is to provide a method for producing porous carbon structures with a significantly increased surface area and total pore volume.

[0009] Another aspect of this disclosure is to provide a porous carbon structure with a significantly increased surface area and total pore volume.

[0010] Another aspect of this disclosure is to provide an adsorbent that is endowed with excellent properties by comprising a porous carbon structure having a significantly increased surface area and total pore volume.

[0011] Another aspect of this disclosure is to provide an electrode for an electrochemical device, which is endowed with excellent performance by including a porous carbon structure having a greatly increased surface area and total pore volume.

[0012] Another aspect of this disclosure is to provide a membrane-electrode assembly that is endowed with superior performance by including an anode and / or cathode having a porous carbon structure having a significantly increased surface area and total pore volume.

[0013] Another aspect of this disclosure is to provide a fuel cell that is endowed with superior performance by including the membrane-electrode assembly.

[0014] In addition to the aspects of this disclosure described above, other features and advantages of this disclosure will be clearly understood by those skilled in the art to which this disclosure pertains in the detailed description that follows.

[0015] Technical solution

[0016] According to one aspect of this disclosure, a method for manufacturing a porous carbon structure is provided, the method comprising: preparing a template having a mesoporous shell; injecting a carbon precursor into the template, wherein the carbon precursor comprises a polymer precursor and a crosslinking agent, wherein the polymer precursor comprises a first component having halogen functional groups and a second component not having halogen functional groups, wherein the content of the first component in the polymer precursor is 20% to 80% by weight; polymerizing the polymer precursor to form a polymer; carbonizing the polymer to obtain a template-carbon composite; and removing the template from the template-carbon composite.

[0017] The first component may be a halogenated monomer or NH4F.

[0018] The halogenated monomer may be a fluorinated monomer.

[0019] The first component may be fluorophenol, the second component may be phenol, and the crosslinking agent may be paraformaldehyde.

[0020] The fluorophenol may be 4-fluorophenol.

[0021] The first component may be NH4F, the second component may be phenol, and the crosslinking agent may be paraformaldehyde.

[0022] The method may further include treating the template with acid prior to injecting the carbon precursor.

[0023] The acid may contain AlCl3.

[0024] According to another aspect of this disclosure, a porous carbon structure is provided having a porous structure with a diameter of 2,000 to 5,000 μm. 2 / g BET surface area and 2.0 to 7.2cm 3 / g total pore volume.

[0025] The porous carbon structure can have a diameter of 2,300 to 5,000 m. 2 / g BET surface area and 2.8 to 7.2cm 3 / g total pore volume.

[0026] The porous carbon structure can have a size of 3,100 to 5,000 m. 2 / g BET surface area and 5.0 to 7.2cm 3 / g total pore volume.

[0027] The porous carbon structure can have a diameter of 3,400 to 5,000 μm. 2 / g BET surface area and 5.7 to 7.2cm 3 / g total pore volume.

[0028] The porous carbon structure can have a hollow structure.

[0029] According to another aspect of this disclosure, an adsorbent comprising the porous carbon structure is provided.

[0030] According to another aspect of this disclosure, an electrode for an electrochemical device is provided, the electrode comprising the porous carbon structure.

[0031] According to another aspect of this disclosure, a membrane-electrode assembly is provided, the membrane-electrode assembly including an anode, a cathode and an electrolyte membrane between the anode and the cathode, wherein at least one electrode selected from the anode and the cathode includes the porous carbon structure and catalytic metal particles dispersed on the porous carbon structure.

[0032] According to another aspect of this disclosure, a fuel cell including the membrane-electrode assembly is provided.

[0033] The above general description provided for this disclosure is for illustrative purposes only and does not limit the scope of this disclosure.

[0034] Beneficial effects

[0035] This disclosure provides a porous carbon structure with significantly increased surface area and total pore volume, which overcomes the limitations of the prior art. Therefore, this disclosure can meet the demand for porous carbon structures with higher surface area and total pore volume arising from technological developments in related fields.

[0036] Furthermore, the porous carbon structure disclosed herein can improve the performance of adsorbents including it as well as the performance of electrochemical devices including it (e.g., fuel cells, secondary batteries, capacitors, etc.). Attached Figure Description

[0037] The above and other objects, features and other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0038] Figure 1 This is a schematic diagram illustrating a method for manufacturing a porous carbon structure according to one embodiment of the present disclosure;

[0039] Figure 2 The BET adsorption / desorption isotherm curves of the carbon structure obtained by polymerization and carbonization of carbon precursors containing "components with halogen functional groups" and conventional carbon precursors disclosed herein.

[0040] Figure 3 a is a transmission electron microscope (TEM) image of the template prepared in Example 2;

[0041] Figure 3 b is a TEM image of the porous carbon structure of Comparative Example 2a;

[0042] Figure 3 c is a TEM image of the porous carbon structure of Example 2a;

[0043] Figure 3 d is a TEM image of the porous carbon structure in Example 2b;

[0044] Figure 3 e is a TEM image of the porous carbon structure in Example 2c;

[0045] Figure 3 f is a TEM image of the porous carbon structure of Comparative Example 2b;

[0046] Figure 4 These are the BET adsorption / desorption isotherms of the porous carbon structures in Examples 1a to 1c and the porous carbon structures in Comparative Examples 1a and 1b.

[0047] Figure 5 The BET adsorption / desorption isotherms are for the porous carbon structures of Examples 2a to 2c and Comparative Examples 2a and 2b. Detailed Implementation

[0048] In the following description, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided merely as examples to provide a clear understanding of the present disclosure and do not limit its scope.

[0049] Figure 1This is a schematic diagram illustrating a method for manufacturing a porous carbon structure according to one embodiment of the present disclosure.

[0050] like Figure 1 As shown, the method of this disclosure includes: preparing a template 10 having a mesoporous shell 12; injecting a carbon precursor 20 into the template 10; polymerizing the carbon precursor 20 to form a polymer; carbonizing the polymer to obtain a template-carbon composite; and removing the template 10 from the template-carbon composite.

[0051] The preparation of template 10 may include forming a mesoporous shell 12 on spherical inorganic particles 11.

[0052] Inorganic particles 11 may include inorganic oxides such as zirconium oxide, aluminum oxide, titanium dioxide, silicon dioxide, and cerium dioxide. For example, commercially available silicon dioxide particles with a diameter of 10 nm to 1,000 nm can be used as inorganic particles 11. Alternatively, silicon dioxide particles can be prepared by adding tetraethyl orthosilicate (TEOS) (also known as "tetraethoxysilane") to a mixed solution of ammonia, ethanol, and deionized water, and stirring the resulting mixture for a sufficient time.

[0053] In the following text, for ease of description, a method for preparing a template 10 including silica particles as inorganic particles 11 will be described in detail.

[0054] First, TEOS and octadecyltrimethoxysilane (C 18 -TMS) is added to the dispersion obtained by injecting silica particles 11 into a dispersion medium (e.g., a mixed dispersion medium of ethanol and water), and stirred for a sufficient time. Here, C 18 -TMS acts as a silane coupling agent. By controlling the interaction between TEOS and C... 18 The molar ratio of TEOS allows the pore size of the mesoporous shell 12 formed by the following calcination process to be adjusted within the range of 2 to 50 nm. For example, this molar ratio can be 3 to 50. With TEOS and C 18 As the molar ratio of TMS increases, the pore size of the mesoporous shell 12 decreases.

[0055] Subsequently, the silica particles 11 are separated from the dispersion by, for example, centrifugation, and then placed in a furnace and calcined at 500°C to 600°C (e.g., about 550°C) for 5 to 7 hours. The organic functional group (i.e., C...) of the silane coupling agent... 18 -TMS) is removed by a calcination process, so that the mesoporous shell 12 can be formed on the silica particles 11.

[0056] As an optional process, the template 10 thus obtained can be acid-treated. For example, the template 10 can be immersed in an acid solution containing AlCl3, dried, and then calcined at 500°C to 600°C (e.g., about 550°C) for 2 to 4 hours to prepare a template 10 having a mesoporous aluminum silica shell 12. This acid treatment can form acid sites on the surface of the template 10 to induce surface reactions, ultimately maximizing the surface area and total pore volume of the porous carbon structure 100 fabricated through the template 10.

[0057] Then, as Figure 1 As shown, carbon precursor 20 is injected into template 10. There are no particular limitations on the method of injecting carbon precursor 20 in this disclosure. For example, carbon precursor 20 can be injected into mesopores in template 10 by methods such as vacuum filling.

[0058] According to this disclosure, carbon precursor 20 comprises a polymer precursor and a crosslinking agent, and the polymer precursor comprises a first component having halogen functional groups and a second component not having halogen functional groups. The first component and the second component may each be a monomer. Alternatively, the first component may be a halogenating agent, and only the second component may be a monomer component. In some cases, carbon precursor 20 may further comprise an initiator for the polymerization of the monomer component.

[0059] The monomer components can be polymerized by condensation polymerization or addition polymerization. For example, carbon precursor 20 may contain phenolic monomers capable of forming phenolic resins by condensation polymerization as monomer components, and paraformaldehyde as a crosslinking agent.

[0060] The first component having a halogen functional group can be a halogenated monomer and / or NH4F. The halogenated monomer is a monomer in which the same monomer as the second component is replaced by a halogenated functional group, and can be a fluorinated monomer, a chloride monomer, a brominated monomer or an iodinated monomer, and preferably a fluorinated monomer.

[0061] For example, when carbon precursor 20 comprises phenol as a second component and paraformaldehyde as a crosslinking agent, the first component may be a halogenated phenol such as fluorophenol, chlorophenol, bromophenol, or iodophenol, preferably fluorophenol, and more preferably 4-fluorophenol. That is, carbon precursor 20 according to one embodiment of the present disclosure may comprise 4-fluorophenol, phenol, and paraformaldehyde.

[0062] Alternatively, instead of halogenated monomers or other components, the carbon precursor 20 of this disclosure may contain NH4F as a first component having a halogenated functional group. For example, the carbon precursor 20 according to one embodiment of this disclosure may contain NH4F, phenol, and paraformaldehyde.

[0063] The inventors of this disclosure have discovered that the "first component having halogen functional groups" contained in the carbon precursor 20 significantly increases the surface area of ​​the carbon structure obtained by polymerization and carbonization of the carbon precursor 20.

[0064] Figure 2 The BET adsorption / desorption isotherms of the carbon structure obtained by polymerization and carbonization of the carbon precursor containing "a first component having halogen functional groups" and conventional carbon precursors disclosed herein are shown.

[0065] Specifically, Figure 2 The graphs show: (i) BET adsorption / desorption isotherms of the first carbon precursor, obtained by heating a carbon precursor containing 4-fluorophenol and phenol and paraformaldehyde (phenol: 0.2 g, 4-fluorophenol: 0.2 g) at 160 °C for 6 hours, followed by polymerization and carbonization at 1,000 °C for 6 hours in an Ar atmosphere; and (ii) BET adsorption / desorption isotherms of the second carbon precursor, obtained by heating a carbon precursor containing NH4F ...iii) BET adsorption / desorption isotherms of the second carbon precursor, obtained by heating a carbon precursor containing NH4F and phenol and paraformaldehyde (phenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: 0.2 g, 4-fluorophenol: The carbon precursor of paraformaldehyde (phenol: 0.3 g, NH4F: 0.1 g) was heated at 160 °C for 6 hours, followed by polymerization and carbonization at 1,000 °C for 6 hours in an Ar atmosphere, and (iii) the BET adsorption / desorption isotherm curve of the third carbon precursor, which was obtained by heating a carbon precursor containing phenol and paraformaldehyde (phenol: 0.4 g) at 160 °C for 6 hours, followed by polymerization and carbonization at 1,000 °C for 6 hours in an Ar atmosphere.

[0066] As from Figure 2 As can be seen, in addition to the second component as a monomer, the carbon structure (i.e., the first carbon structure and the second carbon structure) further comprising a "first component having halogen functional groups" such as 4-fluorophenol or NH4F obtained from the carbon precursor 20 of this disclosure has a much larger surface area than the carbon structure (i.e., the third carbon structure) obtained from the carbon precursor of this disclosure which only comprises a second component as a monomer and lacks a "component having halogen functional groups".

[0067] According to one embodiment of this disclosure, in a polymer precursor comprising a first component and a second component, the content of the first component having halogenated functional groups is 20% to 80% by weight, more preferably 25% to 75% by weight. When the content of the first component having halogenated functional groups in the polymer precursor is less than 20% by weight, the effect of increasing the surface area of ​​the carbon structure according to this disclosure is insufficient. On the other hand, when the content of the first component having halogenated functional groups in the polymer precursor is greater than 80% by weight, structural collapse of the carbon structure occurs, and its surface area decreases instead.

[0068] Return to reference Figure 1Carbon precursor 20 is injected into template 10, and then carbon precursor 20 (more specifically, polymer precursor, and even more specifically, monomer component) is polymerized to form a polymer. The components constituting carbon precursor 20 can be considered to determine the temperature and time of the polymerization reaction. For example, when carbon precursor 20 contains phenolic monomers and paraformaldehyde, the polymerization reaction can be carried out at a temperature of 150°C to 200°C for 5 to 7 hours.

[0069] The polymer formed by the polymerization of carbon precursor 20 is then carbonized to obtain a template-carbon composite. The carbonization process can be carried out at a temperature of 800°C to 1,200°C for 5 to 7 hours in the presence of an inert gas such as Ar or N2.

[0070] Then, template 10 is removed from the template-carbon complex to obtain the porous carbon structure 100 of this disclosure. For example, template 10 is dissolved in a strong base (e.g., NaOH, KOH, etc.) or a strong acid (e.g., HF), and the remaining structure is washed with ethanol, water, or a mixture thereof, and dried at the boiling point of the washing solution or at a higher temperature for a sufficient time to obtain the porous carbon structure 100.

[0071] The porous carbon structure 100 of this disclosure obtained by the above method has a density of 2,000 to 5,000 μm. 2 / g, more preferably 2,300 to 5,000m 2 High BET surface area per g, and 2.0 to 7.2 cm². 3 / g, more preferably 2.8 to 7.2cm 3 / g of total pore volume.

[0072] Specifically, when the template 10 is acid-treated (e.g., using AlCl3) and calcined before the carbon precursor 20 is injected into the template 10, the resulting final porous carbon structure 100 has a density of 3,100 to 5,000 μm. 2 / g, more preferably 3,400 to 5,000m 2 Higher BET surface area per g, and 5.0 to 7.2 cm² 3 / g, more preferably 5.7 to 7.2cm 3 Higher total pore volume per g.

[0073] like Figure 1 As shown, the porous carbon structure 100 of this disclosure can be a hollow structure.

[0074] The porous carbon structure 100 disclosed herein can be used to prepare adsorbents and / or electrodes for electrochemical devices, thereby improving their performance.

[0075] For example, the porous carbon structure 100 of this disclosure can be used to manufacture membrane-electrode assemblies for fuel cells. In other words, in a membrane-electrode assembly including an anode, a cathode, and an electrolyte membrane between the anode and the cathode, at least one electrode selected from the anode and the cathode includes the porous carbon structure 100 of this disclosure and catalyst metal particles dispersed on the porous carbon structure 100.

[0076] The present disclosure will be described in more detail below with reference to preparation examples, embodiments, and comparative examples. However, the preparation examples, embodiments, and comparative examples should not be construed as limiting the scope of the present disclosure.

[0077] [Template Preparation]

[0078] Preparation Example 1

[0079] Commercially available silica nanoparticles were dispersed in a mixed dispersion medium of ethanol and water to obtain a mixture. TEOS and C... 18 -TMS was added to the mixture and stirred for 4 hours. Then, the silica nanoparticles separated from the mixture by centrifugation were calcined at 550°C for 6 hours to prepare a template in which mesoporous shells were formed on each silica nanoparticle.

[0080] Preparation Example 2

[0081] The template obtained in Preparation Example 1 was immersed in 0.2 g of a solution containing AlCl3, dried, and calcined at 550 °C for 3 hours to prepare a template with a mesoporous aluminosilicate shell.

[0082] [Preparation of porous carbon structures using the template from Preparation Example 1]

[0083] Example 1a

[0084] A carbon precursor was implanted into the mesopores of the template obtained in Preparation Example 1 using a vacuum filling method. The carbon precursor comprised a polymer precursor (4-fluorophenol and phenol) and a crosslinking agent (paraformaldehyde). The contents of 4-fluorophenol and phenol in the polymer precursor were 0.1 g and 0.3 g, respectively. Subsequently, the template with the carbon precursor implanted was heated at 160 °C for 6 hours to polymerize the carbon precursor. Then, the polymer was carbonized at 1000 °C for 6 hours in an Ar atmosphere to obtain a template-carbon composite. Subsequently, template 10 was dissolved in HF and removed from the template-carbon composite, and the remaining structure was washed and dried to complete the porous carbon structure.

[0085] Example 1b

[0086] The porous carbon structure was completed in the same manner as in Example 1a, except that the contents of 4-fluorophenol and phenol in the polymer precursor were both 0.2 g.

[0087] Example 1c

[0088] The porous carbon structure was completed in the same manner as in Example 1a, except that the contents of 4-fluorophenol and phenol in the polymer precursor were 0.3 g and 0.1 g, respectively.

[0089] Comparative Example 1a

[0090] The porous carbon structure was completed in the same manner as in Example 1a, except that the polymer precursor contained only phenol (0.4 g) and not 4-fluorophenol.

[0091] Comparative Example 1b

[0092] The porous carbon structure was completed in the same manner as in Example 1a, except that the polymer precursor contained only 4-fluorophenol (0.4 g) and no phenol.

[0093] [Preparation of porous carbon structures using the template from Preparation Example 2]

[0094] Example 2a

[0095] The porous carbon structure was completed in the same manner as in Example 1a, except that the template of Preparation Example 2 was used instead of the template of Preparation Example 1.

[0096] Example 2b

[0097] The porous carbon structure was completed in the same manner as in Example 2a, except that the contents of 4-fluorophenol and phenol in the polymer precursor were both 0.2 g.

[0098] Example 2c

[0099] The porous carbon structure was completed in the same manner as in Example 2a, except that the contents of 4-fluorophenol and phenol in the polymer precursor were 0.3 g and 0.1 g, respectively.

[0100] Comparative Example 2a

[0101] The porous carbon structure was completed in the same manner as in Example 2a, except that the polymer precursor contained only phenol (0.4 g) and not 4-fluorophenol.

[0102] Comparative Example 2b

[0103] The porous carbon structure was completed in the same manner as in Example 2a, except that the polymer precursor contained only 4-fluorophenol (0.4 g) and no phenol.

[0104] [Transmission Electron Microscopy (TEM) Analysis]

[0105] Transmission electron micrographs of the template for the preparation of the mesoporous aluminosilicate shell in Example 2, and the porous carbon structures of Examples 2a to 2c and Comparative Examples 2a and 2b are shown in the figure. Figure 3 middle. Figure 3 a is a TEM image of the template prepared in Example 2; Figure 3 b is a TEM image of the porous carbon structure of Comparative Example 2a, in which the content of 4-fluorophenol in the carbon precursor is 0% by weight; Figure 3 c is a TEM image of the porous carbon structure of Example 2a, wherein the weight ratio of 4-fluorophenol to phenol in the carbon precursor is 1:3; Figure 3 d is a TEM image of the porous carbon structure of Example 2b, wherein the weight ratio of 4-fluorophenol to phenol in the carbon precursor is 1:1; Figure 3 e is a TEM image of the porous carbon structure of Example 2c, wherein the weight ratio of 4-fluorophenol to phenol in the carbon precursor is 3:1; and Figure 3 f is a TEM image of the porous carbon structure of Comparative Example 2b, in which the phenol content in the carbon precursor is 0 by weight.

[0106] Figure 3 As shown in b to 3e, the porosity of the mesoporous shell with hollow carbon structure increases with the increase of the content of the component with halogen functional groups (i.e., 4-fluorophenol) in the polymer precursor (or the weight ratio of the first component with halogen functional groups to the second component without halogen functional groups). On the other hand, as from... Figure 3 As can be seen, when the content of components with halogen functional groups (i.e., 4-fluorophenol) in the polymer precursor is too high, the carbon structure collapses.

[0107] [Brunauer-Emmett-Teller (BET) Surface Area Analysis]

[0108] The BET adsorption / desorption isotherms of the porous carbon structures of the examples and comparative examples were obtained using a BET analyzer (Micromeritics, ASAP-2020). Figure 4 These are the BET adsorption / desorption isotherms of the porous carbon structures in Examples 1a to 1c and Comparative Examples 1a and 1b. Figure 5 These are the BET adsorption / desorption isotherms of the porous carbon structures in Examples 2a to 2c and Comparative Examples 2a and 2b.

[0109] As from Figure 4 and Figure 5As can be seen, the porous carbon structure according to the embodiments of the present disclosure prepared using a carbon precursor containing an appropriate amount of a component with halogen functional groups (i.e., 4-fluorophenol) has a much larger surface area than the porous carbon structures of Comparative Examples 1a and 2a prepared using a carbon precursor that does not contain a component with halogen functional groups.

[0110] On the other hand, the BET adsorption / desorption isotherms of Comparative Examples 1b and 2b demonstrate the following fact: when a porous carbon structure is prepared using a carbon precursor containing a very large amount of components with halogen functional groups, the carbon structure collapses, thereby reducing its surface area.

[0111] In addition, the BET surface area (ST) of the templates in the preparation examples and the porous carbon structures of the examples and comparative examples was measured using a BET analyzer (Micromeritics, ASAP-2020). BET ), micropore volume (V) MICRO ), mesopore volume (V) MESO ), total pore volume (V TOTAL And aperture. Specifically, the physical properties of five randomly selected samples were measured, and the average value of the measured values ​​for each physical property was calculated and shown in Table 1 below.

[0112] [Table 1]

[0113]

[0114] As can be seen from Table 1, the porous carbon structures of the comparative examples have a diameter of less than 1,500 μm. 2 The relatively low BET surface area (S / g) BET ) and less than 2.0cm 3 The relatively low total pore volume (V / g) TOTAL The porous carbon structure of the embodiments disclosed herein has a diameter of 2,000 to 4,400 μm. 2 / g, more specifically 2,300 to 4,400m 2 / g high BET surface area (S BET ), and 2.0 to 6.8 cm 3 / g, more specifically 2.8 to 6.8cm 3 / g of total pore volume (V TOTAL ).

[0115] In particular, the porous carbon structures of Examples 2a to 2c have a diameter of 3,100 to 4,400 μm. 2 / g, more specifically 3,400 to 4,400m 2 / g of very high BET surface area (S BET ), and 5.0 to 6.8 cm 3 / g, more specifically 5.7 to 6.8cm 3 Very high total pore volume (V / g) TOTAL In Examples 2a to 2c, the porous carbon structures were each prepared using the template from Preparation Example 2, which was obtained by immersing the template from Preparation Example 1 in an acid solution containing AlCl3, followed by drying and calcination.

[0116] On the other hand, Examples 2a to 2c each exhibit two pore size values, which means that the pores of these carbon structures have a bimodal particle size distribution.

Claims

1. A method for manufacturing a porous carbon structure, the method comprising: Prepare a template with a mesoporous shell; The template was treated with acid; A carbon precursor is implanted into the template treated with acid, wherein the carbon precursor comprises a polymer precursor and a crosslinking agent, the polymer precursor comprises a first component having halogen functional groups and a second component not having halogen functional groups, and the first component is present in the polymer precursor at a content of 20% to 80% by weight. The polymer precursor is polymerized to form a polymer; Carbonize the polymer to obtain a template-carbon composite; and The template is removed from the template-carbon complex to obtain a carbon composite with a carbon content of 3,100 to 5,000 m. 2 / g BET surface area and 5.0 to 7.2 cm² 3 Porous carbon structure with a total pore volume of / g. The first component is NH4F, the second component is phenol, and the crosslinking agent is paraformaldehyde.

2. The method according to claim 1, wherein, The acid contains AlCl3.

3. A porous carbon structure manufactured by the method of claim 1, wherein the porous carbon structure has a porous structure having a porous structure of 3,100 to 5,000 μm. 2 / g BET surface area and 5.0 to 7.2 cm² 3 / g total pore volume.

4. The porous carbon structure according to claim 3, wherein, The porous carbon structure has a diameter of 3,400 to 5,000 m. 2 BET surface area per g and 5.7 to 7.2 cm² 3 / g total pore volume.

5. The porous carbon structure according to claim 3 or 4, wherein, The porous carbon structure has a hollow structure.

6. An adsorbent comprising the porous carbon structure according to claim 3 or 4.

7. An electrode for an electrochemical device, the electrode comprising a porous carbon structure according to claim 3 or 4.

8. A membrane-electrode assembly, comprising: anode; cathode; as well as The electrolyte membrane between the anode and the cathode, At least one electrode selected from the anode and the cathode includes: The porous carbon structure according to claim 3 or 4; and Catalytic metal particles dispersed on the porous carbon structure.

9. A fuel cell comprising the membrane-electrode assembly according to claim 8.

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