A nano-porous flaky TiC, its preparation method and application

Abstract

The present invention belongs to the technical field of the preparation of titanium compounds, and specifically relates to a nano-porous flaky TiC, a preparation method thereof and an application. A high-energy decomposing agent is added to a MAX material for high-energy decomposition to undergo a phase change peeling reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain the nano-porous flaky TiC. The preparation method of the present invention is not only simple in operation, controllable in process, low in cost, and good in repeatability, but also the prepared TiC has characteristics such as a uniform and complete porous sheet structure and a large specific surface area. The TiC prepared by this method can be effectively applied in fields such as ceramics, coating materials, cutting tools, aerospace, ships, batteries, and supercapacitors, and has broad application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of the preparation of titanium compounds, and particularly relates to a nano-porous flaky TiC, a preparation method thereof and an application thereof. Background Art

[0002] TiC is a typical transition metal carbide. Its bond type is a mixture of ionic bonds, covalent bonds and metallic bonds in the same crystal structure. Therefore, TiC has many unique properties, such as high hardness, high melting point, wear resistance, corrosion resistance and electrical conductivity. Therefore, titanium carbide can not only be widely used in traditional fields such as ceramics, coating materials, cutting tools, aerospace, ships, etc., but also be favored by research scholars in emerging energy storage fields such as lithium-ion batteries, lithium-sulfur batteries and supercapacitors. Due to the wide application of TiC, its preparation method has also become one of the research hotspots. At present, there are many methods for preparing TiC at home and abroad, which can be roughly divided into three categories: solid-phase method, liquid-phase method and gas-phase method. In the solid-phase method, the carbothermal reduction of TiO2 method is a relatively mature method and also the main method for industrial production of TiC. However, the TiC prepared by this method has relatively large particles, generally in the micron size range, and the distribution is uneven. It is difficult for the raw materials to react completely, the morphology is difficult to control, and the synthesis reaction temperature and reaction time are relatively long, resulting in high energy consumption. In the liquid-phase method, the sol-gel method uses inorganic substances or metal alkoxides as precursors, mixes the raw materials in the liquid phase, and undergoes a series of reactions such as hydrolysis and polycondensation to form a sol. After aging, solvent removal, and slow aggregation of the colloidal particles, a three-dimensional network skeleton is formed, and finally a gel is formed. Finally, the required product is synthesized through solidification and sintering. However, this method has problems such as a long operation process, low production efficiency, many influencing factors, and difficult product quality control. Chemical vapor deposition is a commonly used gas-phase method for preparing TiC, but the amount of the synthesized product by this method is very limited, which is not conducive to large-scale industrial production. At the same time, it has high requirements for the reaction vessel, and the raw materials and the synthesized products are harmful to the human body (such as TiCl4, HCl, etc.). Through the above various preparation methods of titanium carbide, it can be seen that the titanium carbide prepared by traditional methods has large size, difficult morphology control and high cost. Therefore, it is an urgent problem to be solved to prepare titanium carbide and its composites with novel structures and simple operations through reasonable design. Summary of the Invention

[0003] To solve the problems existing in the prior art, the main object of the present invention is to provide a nano-porous flaky TiC, a preparation method thereof and an application thereof, so as to obtain layered TiC with nanoscale and excellent properties, and solve the problems of the existing TiC such as large size, irregular morphology and difficult direct application.

[0004] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0005] A preparation method of nano-porous flaky TiC, which is a method for preparing nano-flaky TiC by high-energy phase change exfoliation. A high-energy decomposing agent is added to the MAX material for high-energy decomposition to occur a phase change exfoliation reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain nano-porous flaky TiC.

[0006] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: the MAX material includes at least one of Ti3AlC2, Ti2AlC, Ti3SiC2, Ti2SnC, and Ti3SnC2.

[0007] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: the high-energy decomposing agent includes at least one of picric acid, trinitrotoluene, and cyclotrimethylenetrinitramine.

[0008] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: the mass ratio of the MAX material to the high-energy decomposing agent is 1:(1 - 30).

[0009] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: adding a high-energy decomposing agent to the MAX material for high-energy decomposition to occur a phase change exfoliation reaction, specifically:

[0010] The MAX material and the high-energy decomposing agent are mixed evenly and then loaded into a high-pressure reaction kettle. A gas that does not react with it is introduced into the high-pressure reaction kettle for protection, and then the high-pressure reaction kettle is placed in a high-temperature furnace to occur a phase change exfoliation reaction.

[0011] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: the temperature of the phase change exfoliation reaction is 150 - 700 °C, and the time is 30 - 180 min.

[0012] As a preferred embodiment of the preparation method of nano-porous flaky TiC described in the present invention, wherein: the gas that does not react with it is at least one of nitrogen and inert gas.

[0013] To solve the above technical problems, according to another aspect of the present invention, the present invention provides the following technical solutions:

[0014] A nano-porous flaky TiC, which is prepared by using the above preparation method of nano-porous flaky TiC.

[0015] As a preferred embodiment of the nano-porous flaky TiC described in the present invention, wherein: the specific surface area of the nano-porous flaky TiC is 78 - 340 m 2 / g, the single-layer thickness is 0.5 - 1 nm, and the pore diameter of the pores is 0.1 - 4 μm.

[0016] To solve the above technical problems, according to another aspect of the present invention, the present invention provides the following technical solutions:

[0017] An application of the above-mentioned nano-porous flaky TiC in the fields of ceramics, coating materials, cutting tools, aerospace, ships, batteries, and supercapacitors.

[0018] The beneficial effects of the present invention are as follows:

[0019] The present invention provides a nano-porous flaky TiC, its preparation method and application. High-energy decomposing agent is added to the MAX material for high-energy decomposition to occur phase transition peeling reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain nano-porous flaky TiC. The preparation method of the present invention is not only simple in operation, controllable in process, low in cost, and good in repeatability, but also the prepared TiC has characteristics such as uniform and complete porous sheet layer structure and large specific surface area. The TiC prepared by this method can be effectively applied in the fields of ceramics, coating materials, cutting tools, aerospace, ships, batteries, and supercapacitors, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 SEM diagram of the TiC prepared in Example 1 of the present invention;

[0022] Figure 2 XRD diagram of the TiC prepared in Example 1 of the present invention;

[0023] Figure 3 SEM diagram of the substance prepared in Comparative Example 1 of the present invention;

[0024] Figure 4 XRD diagram of the substance prepared in Comparative Example 1 of the present invention.

[0025] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides a nano-porous flaky TiC, its preparation method and application, to obtain layered TiC with nanoscale and excellent properties, and solve the problems of large size, irregular morphology and difficult direct application of existing TiC.

[0028] According to one aspect of the present invention, the following technical solutions are provided:

[0029] A preparation method of nano-porous flaky TiC is a method for preparing nano-flaky TiC by high-energy phase change peeling. A high-energy decomposing agent is added to the MAX material for high-energy decomposition to occur phase change peeling reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered and dried to obtain nano-porous flaky TiC.

[0030] Preferably, the MAX material includes at least one of Ti3AlC2, Ti2AlC, Ti3SiC2, Ti2SnC, Ti3SnC2. The mass ratio of Ti3AlC2, Ti2AlC, Ti3SiC2, Ti2SnC, Ti3SnC2 is not limited. For example, it can be but not limited to 0-2:0-2:0-2:0-2:0-2, where at least one is not 0. The high-energy decomposing agent includes at least one of picric acid, trinitrotoluene, cyclotrimethylenetrinitramine. The mass ratio of picric acid, trinitrotoluene, cyclotrimethylenetrinitramine is not limited. For example, it can be but not limited to 0-2:0-2:0-2, where at least one is not 0. The mass ratio of the MAX material to the high-energy decomposing agent is 1:(1-30). Specifically, the mass ratio of the MAX material to the high-energy decomposing agent can be, for example but not limited to, any one or the range between any two of 1:1, 1:2, 1:5, 1:10, 1:15, 1:20, 1:25, 1:30.

[0031] Preferably, a high-energy decomposing agent is added to the MAX material for high-energy decomposition to occur a phase change peeling reaction, specifically: the MAX material and the high-energy decomposing agent are evenly mixed and then loaded into a high-pressure reactor. A gas that does not react with it is introduced into the high-pressure reactor for protection, and then the high-pressure reactor is placed in a high-temperature furnace to occur a phase change peeling reaction; the temperature of the phase change peeling reaction is 150-700 °C, and the time is 30-180 min; the gas that does not react with it is at least one of nitrogen and inert gas. Specifically, the temperature of the phase change peeling reaction can be, for example but not limited to, any one or the range between any two of 150 °C, 200 °C, 250 °C, 300 °C, 350 °C, 400 °C, 450 °C, 500 °C, 550 °C, 600 °C, 700 °C; the time of the phase change peeling reaction can be, for example but not limited to, any one or the range between any two of 30 min, 60 min, 90 min, 120 min, 150 min, 180 min;

[0032] Preferably, after cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain nano-porous flaky TiC, specifically: after water-cooling to room temperature, the gas is slowly released, the high-pressure reactor is opened to take out the black powder, which is placed in deionized water for ultrasonic dispersion, and after centrifugation, washing, and filtration, the filter cake is taken out and vacuum-dried to obtain nano-porous flaky TiC. Further preferably, the ultrasonic dispersion time is 20-40 min, the centrifugation speed is 800-1000 rpm, and the centrifugation time is 10-30 min. Specifically, the ultrasonic dispersion time can be, for example but not limited to, any one or the range between any two of 20 min, 25 min, 30 min, 35 min, 40 min; the centrifugation speed can be, for example but not limited to, any one or the range between any two of 800 rpm, 850 rpm, 900 rpm, 950 rpm, 1000 rpm; the centrifugation time can be, for example but not limited to, any one or the range between any two of 10 min, 15 min, 20 min, 25 min, 30 min.

[0033] According to another aspect of the present invention, the present invention provides the following technical solution:

[0034] A nano-porous flaky TiC is prepared by using the preparation method of the above-mentioned nano-porous flaky TiC.

[0035] As a preferred scheme of the nano-porous flaky TiC described in the present invention, wherein: the specific surface area of the nano-porous flaky TiC is 78-340 m 2 / g, the single-layer thickness is 0.5-1 nm, and the pore diameter of the pores is 0.1-4 μm.

[0036] According to another aspect of the present invention, the present invention provides the following technical solution:

[0037] Applications of the above-mentioned nano-porous flaky TiC in the fields of ceramics, coating materials, cutting tools, aerospace, ships, batteries, and supercapacitors, etc.

[0038] The technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0039] Example 1

[0040] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0041] Mix 0.2 g of Ti3AlC2 and 2 g of picric acid evenly according to a mass ratio of 1:10, then load them into a high-pressure reaction kettle. After sealing, introduce argon gas into the high-pressure reaction kettle for protection. Place the reaction kettle in a pit furnace and heat it to 500 °C for insulation for 60 min to carry out a phase change peeling reaction. After cooling to room temperature with water, slowly release the gas. Open the reaction kettle, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, and then filter and vacuum dry it to obtain nano-porous flaky TiC. The SEM image of the nano-porous flaky TiC prepared in this example is as shown in Figure 1 shown, and the XRD pattern is as shown in Figure 2 shown. Figure 1 The SEM image of shows a nano-porous flaky morphology of TiC, Figure 2 and the XRD pattern in indicates that the sample prepared in this example is TiC.

[0042] Example 2

[0043] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0044] Mix 0.1 g of Ti3AlC2 and 0.5 g of trinitrotoluene evenly according to a mass ratio of 1:5, then load them into a high-pressure reaction kettle. After sealing, introduce nitrogen gas into the high-pressure reaction kettle for protection. Place the reaction kettle in a pit furnace and heat it to 300 °C for insulation for 30 min to carry out a phase change peeling reaction. After cooling to room temperature with water, slowly release the gas. Open the reaction kettle, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 20 min, wash it clean, and then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0045] Example 3

[0046] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0047] Mix 0.1 g of Ti2AlC and 0.2 g of cyclotrimethylenetrinitramine evenly according to a mass ratio of 1:2, then load them into a high-pressure reactor. After sealing, introduce argon gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 250 °C for heat preservation for 100 min to undergo a phase transition and exfoliation reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 20 min, centrifuge it at 1000 rpm for 30 min, wash it clean, then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0048] Example 4

[0049] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0050] Mix 0.1 g of Ti2AlC and 0.1 g of trinitrotoluene evenly according to a mass ratio of 1:1, then load them into a high-pressure reactor. After sealing, introduce nitrogen gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 250 °C for heat preservation for 150 min to undergo a phase transition and exfoliation reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 40 min, centrifuge it at 800 rpm for 20 min, wash it clean, then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0051] Example 5

[0052] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0053] Mix 0.1 g of Ti2AlC and 2 g of trinitrotoluene evenly according to a mass ratio of 1:20, then load them into a high-pressure reactor. After sealing, introduce argon gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 450 °C for heat preservation for 120 min to undergo a phase transition and exfoliation reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0054] Example 6

[0055] A preparation method of nano-porous flaky TiC, comprising the following steps:

[0056] Mix 0.1 g of Ti2SnC and 3 g of picric acid evenly according to a mass ratio of 1:30, then load them into a high-pressure reactor. After sealing, introduce argon gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 600 °C for insulation for 180 min to undergo a phase transition peeling reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, and then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0057] Example 7

[0058] A preparation method of nano-porous flaky TiC includes the following steps:

[0059] Mix 0.1 g of Ti3SnC2 and 1 g of picric acid evenly according to a mass ratio of 1:10, then load them into a high-pressure reactor. After sealing, introduce argon gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 450 °C for insulation for 90 min to undergo a phase transition peeling reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, and then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0060] Example 8

[0061] A preparation method of nano-porous flaky TiC includes the following steps:

[0062] Mix 1 g of Ti3AlC2, Ti2AlC, Ti3SiC2, and Ti2SnC mixed according to a mass ratio of 1:1:1:2 and 2 g of picric acid evenly according to a mass ratio of 1:2, then load them into a high-pressure reactor. After sealing, introduce nitrogen gas into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 600 °C for insulation for 90 min to undergo a phase transition peeling reaction. Cool it to room temperature with water, then slowly release the gas. Open the reactor, take out the black powder, disperse it ultrasonically in deionized water for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, and then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0063] Example 9

[0064] A preparation method of nano-porous flaky TiC includes the following steps:

[0065] Mix 1 g of Ti3AlC2, Ti2AlC, Ti3SiC2, and Ti2SnC mixed in a ratio of 1:1:1:2 with 2 g of trinitrotoluene and cyclotrimethylenetrinitramine mixed in a mass ratio of 1:2 evenly, then load them into a high-pressure reactor. After sealing, introduce nitrogen into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 600 °C for insulation for 90 min to undergo a phase transition peeling reaction. After cooling to room temperature in water, slowly release the gas. Open the reactor and take out the black powder. Place it in deionized water and ultrasonically disperse it for 30 min, centrifuge it at 1000 rpm for 10 min, wash it clean, then filter and vacuum dry it to obtain nano-porous flaky TiC.

[0066] Comparative Example 1

[0067] Mix 2 g of Ti3AlC2 and 2 g of picric acid evenly in a mass ratio of 1:1, then load them into a high-pressure reactor. After sealing, introduce argon into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 500 °C for insulation for 20 min, then cool it in water and slowly release the gas. Open the high-pressure reactor and take out the black powder. Then, filter and vacuum dry it to obtain the prepared substance. The SEM image of the substance prepared in this comparative example is as Figure 3 shown, and the XRD pattern is as Figure 4 shown. Figure 3 The SEM image in Figure 4 shows that no porous sheet structure appears. The XRD pattern in

[0068] shows that the substance prepared in this comparative example is a Ti3AlC2 material. From the comprehensive attached figures, it can be concluded that the substance prepared in this comparative example is not nano-porous flaky TiC.

[0069] Mix 0.5 g of Ti3AlC2 and 1 g of trinitrotoluene evenly in a mass ratio of 1:2, then load them into a high-pressure reactor. After sealing, introduce argon into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 1000 °C for insulation for 60 min, then cool it in water and slowly release the gas. Open the high-pressure reactor and take out the black powder. Then, filter and vacuum dry it to obtain the prepared substance. The substance prepared in this comparative example is thick-layer stacked TiC, rather than nano-porous flaky TiC.

[0070] Comparative Example 2

[0071] Mix 0.4 g of Ti3AlC2 and 0.2 g of trinitrotoluene evenly in a mass ratio of 2:1, then load them into a high-pressure reactor. After sealing, introduce argon into the high-pressure reactor for protection. Place the reactor in a pit furnace and heat it to 300 °C for insulation for 60 min, then cool it in water and slowly release the gas. Open the high-pressure reactor and take out the black powder. Then, filter and vacuum dry it to obtain the prepared substance. The substance prepared in this comparative example is Ti3AlC2, rather than nano-porous flaky TiC.

[0072] Comparative Example 4

[0073] 0.5 g of Ti2AlC and 0.5 g of cyclotrimethylenetrinitramine were mixed evenly according to a mass ratio of 1:1 and then loaded into a high-pressure reactor. After sealing, the high-pressure reactor was filled with argon for protection. The reactor was placed in a pit furnace and heated to 100 °C and kept warm for 90 min, then cooled with water, the gas was slowly released, the high-pressure reactor was opened to take out the black powder, and then, filtered and vacuum dried to obtain the prepared substance. The substance prepared in this comparative example is Ti2AlC, rather than nano-porous sheet-like TiC.

[0074] Comparative Example 5

[0075] 0.5 g of Ti3SnC2 and 0.5 g of cyclotrimethylenetrinitramine were mixed evenly according to a mass ratio of 1:1 and then loaded into a high-pressure reactor. After sealing, the high-pressure reactor was filled with argon for protection. The reactor was placed in a pit furnace and heated to 100 °C and kept warm for 90 min, then cooled with water, the gas was slowly released, the high-pressure reactor was opened to take out the black powder, and then, filtered and vacuum dried to obtain the prepared substance. The substance prepared in this comparative example is Ti3SnC2, rather than nano-porous sheet-like TiC.

[0076] In the present invention, a high-energy decomposer is added to the MAX material for high-energy decomposition to undergo a phase change peeling reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain nano-porous sheet-like TiC; the preparation method of the present invention is not only simple in operation, controllable in process, low in cost, and good in repeatability, but also the prepared TiC has characteristics such as a uniform and complete porous sheet structure and a large specific surface area. The TiC prepared by this method can be effectively applied in the fields of ceramics, coating materials, cutting tools, aerospace, ships, batteries, and supercapacitors, etc., and has broad application prospects.

[0077] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A preparation method of nano-porous flaky TiC, characterized in that A method for preparing nano-sheet TiC by high-energy phase change exfoliation. A high-energy decomposing agent is added to the MAX material for high-energy decomposition to occur a phase change exfoliation reaction. After cooling to room temperature, the reaction product is centrifuged, washed, filtered, and dried to obtain nano-porous sheet TiC; the MAX material includes at least one of Ti3AlC2, Ti2AlC, Ti3SiC2, Ti2SnC, and Ti3SnC2; the high-energy decomposing agent includes at least one of picric acid, trinitrotoluene, and cyclotrimethylenetrinitramine; the mass ratio of the MAX material to the high-energy decomposing agent is 1:(1~30); adding the high-energy decomposing agent to the MAX material for high-energy decomposition to occur a phase change exfoliation reaction, specifically: mixing the MAX material and the high-energy decomposing agent evenly and loading them into a high-pressure reaction kettle, introducing a gas that does not react with it into the high-pressure reaction kettle for protection, and then placing the high-pressure reaction kettle in a high-temperature furnace to occur a phase change exfoliation reaction; the temperature of the phase change exfoliation reaction is 150~700 °C, and the time is 30~180 min.

2. The preparation method of nano-porous flaky TiC according to claim 1, characterized in that The gas that does not react with it is at least one of nitrogen and inert gas.

3. A nano-porous flaky TiC, characterized in that Prepared by the preparation method of the nano-porous flaky TiC according to any one of claims 1-2, the specific surface area of the nano-porous flaky TiC is 78~340m 2 / g, the monolayer thickness is 0.5~1nm, and the pore diameter of the pores is 0.1~4μm.

4. Application of the nano-porous flaky TiC prepared by the preparation method of nano-porous flaky TiC according to any one of claims 1-2 or the nano-porous flaky TiC according to claim 3 in the fields of ceramics, coating materials, cutting tools, aerospace, ships, batteries and supercapacitors.

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