A sulfur-containing medium-high-entropy max phase solid solution material and a preparation method thereof

Abstract

This invention discloses a sulfur-containing medium-high entropy MAX phase solid solution material with the chemical formula M2S1Sn. 0.1 C and M are any combination of three or more of Ti, Nb, Cr, Mo, Ta, Zr, and V. Preparation method: M powder, S powder, Sn powder, and graphite powder are added to a ball mill jar in a molar ratio of 2:1:0.1:1 and ball-milled under an argon atmosphere. The powder is then added to a graphite crucible with a boron nitride coating on its inner surface and pressed into blocks. A tungsten filament is then ignited, and a self-propagating high-temperature reaction is performed under argon protection to synthesize a block material. This block material is then pulverized, sieved, and post-processed to obtain the final product. Compared with existing sulfur-containing high-entropy MAX phase solid solution materials, this invention introduces tin at the A-site. Solid tin becomes a liquid phase after melting, and high-temperature tin has high thermal conductivity. Liquid-phase tin allows for rapid mass and heat transfer, resulting in more complete heating and better control of the target phase synthesis. Furthermore, this method is more environmentally friendly, has higher preparation efficiency, and higher yield.

Description

TECHNICAL FIELD

[0001] The application relates to a preparation method of a sulfur-containing medium-high-entropy MAX phase solid solution material and belongs to the technical field of MAX phase materials. BACKGROUND

[0002] Entropy is a thermodynamic parameter used to describe the degree of disorder or disorder of a system. Entropy is affected by different configurations, such as magnetic moments, atomic vibrations and atomic arrangements, and the latter is usually the most effective configuration for entropy change. Until the concept of high-entropy alloy (HEA) was introduced in recent years, entropy has been effectively used for material design. In 2004, after some early basic research, Yeh et al. and Cantor et al. introduced the concept of HEA in parallel research, and they introduced a new series of multi-component alloys. These alloys exhibit unique composition, microstructure and performance combination. For multi-component materials, high-entropy is usually achieved by introducing a large number of different elements in a single-phase structure, resulting in a variety of possible combinations of interactions similar to HEA. At present, according to the number of elements in the same proportion solid solution, it can be divided into low-entropy (2 kinds), medium-entropy (3 kinds) and high-entropy (4-5 kinds). Medium-high-entropy is the current research hotspot.

[0003] At present, researchers have synthesized medium-high-entropy oxides (HEO), nitrides (HEN), carbides (HEC), borides (HEB), hydrides (HEH), silicides (HESis), sulfides (HES), fluorides (HEF), phosphides (HEP), phosphates (HEPO4), oxynitrides (HEON), carbonitrides (HECN) and borocarbonitrides (HEBCN) and the like. By adjusting M, A and X sites, a double-component solid solution MAX phase solid solution can be obtained. Compared with the conventional MAX phase with metal aluminum and non-metallic silicon in the A site, the A site sulfur in the medium-high-entropy MAX phase has a strong binding force with the M site metal atoms, so that the MAX phase with sulfur in the A site has higher strength and hardness for the same type of MAX phase. At the same time, the sulfur-containing MAX phase also has highly variable redox properties and high activity, so it is of great significance to explore the synthesis of sulfur-containing medium-high-entropy MAX phase to further improve the physical and chemical properties of the MAX phase and expand the application.

[0004] At present, researchers use ferrous sulfide as a high-temperature solid sulfur source to obtain transition metal sulfide through a displacement reaction between transition metal elements and ferrous sulfide, and then combine with metal carbide to prepare a sulfur-containing MAX phase solid solution material. However, this method requires high temperature, and the elemental sulfur source is unstable and volatile during the preparation process, so it is difficult to synthesize a sulfur-containing medium-entropy or high-entropy MAX phase material with high purity. In addition, this method also has problems such as more side reactions, slow reaction speed, low yield and the like. SUMMARY

[0005] The application aims to provide a sulfur-containing medium-high-entropy MAX phase solid solution material and a preparation method thereof. In order to solve the problem of high temperature required for synthesizing the sulfur-containing medium-high-entropy MAX phase and prevent the volatilization of elemental sulfur in the high-temperature preparation process, tin is introduced into the A site. Solid tin is in a liquid phase after melting, and the thermal conductivity of high-temperature tin is high. The liquid-phase tin can quickly transfer mass and heat, so that the heating is more sufficient, which is beneficial to the synthesis of the target phase, and a target phase with high purity can be obtained through subsequent processing. The method is environmentally friendly, low in cost, high in preparation efficiency, and high in yield.

[0006] Technical scheme

[0007] A sulfur-containing medium-high-entropy MAX phase solid solution material has a chemical formula of M2S1Sn 0.1 C, wherein M is any three or more combinations of transition metal elements Ti, Nb, Cr, Mo, Ta, Zr and V. The sulfur-containing medium-high-entropy MAX phase solid solution material has a hexagonal crystal system layered structure and a space group of P63 / mmc.

[0008] Further, the sulfur-containing medium-high-entropy MAX phase solid solution material is (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C, (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Ta 1 / 5 )2S1Sn 0.1 C, (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Mo 1 / 5 )2S1Sn 0.1 C, (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C or (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 C.

[0009] The preparation method of the above-mentioned sulfur-containing medium-high-entropy MAX phase material comprises the following steps:

[0010] (1) M powder, S powder, Sn powder and graphite powder are added to a ball mill jar in a molar ratio of 2:1:0.1:1, and ball milling is performed under an argon atmosphere to obtain a powder;

[0011] (2) the powder is added into a graphite crucible coated with boron nitride on the inner surface and pressed into a block, and then put into a self-propagating high-temperature reaction kettle, ignited by a tungsten wire, and a block-shaped material is synthesized by self-propagating high-temperature reaction under the protection of argon;

[0012] (3) the block-shaped material is crushed by a ball mill and sieved to obtain a solid solution powder material;

[0013] (4) the solid solution powder material is subjected to acid etching treatment, washed with water to neutral after the treatment, then dimethyl sulfoxide is added for ultrasonic treatment, centrifuged and dried after the treatment to obtain a sulfur-containing medium-high entropy MAX phase material.

[0014] Further, in step (1), the ball-to-material ratio of the ball milling is 2:1, the ball milling speed is 300 rpm, and the time is 2-4 h.

[0015] Further, in step (2), the pressure in the reaction kettle is kept at 0.35-0.4 MPa during the self-propagating high-temperature reaction.

[0016] Further, in step (3), the ball-to-material ratio of the ball milling is 3:1, the ball milling speed is 300 rpm, and the time is 2-4 h.

[0017] Further, in step (4), the acid etching treatment uses 1 mol / L hydrochloric acid for 10-15 h. The residual transition metal elements and free Sn can be removed by the acid etching process, which is beneficial to improve the purity of the target phase.

[0018] Further, in step (4), the ultrasonic treatment is carried out under the protection of inert gas, the frequency of the ultrasonic treatment is 40 KHz, and the time is 24 h. The dimethyl sulfoxide (DMSO) assisted ultrasonic stripping treatment of the transition metal carbide particles is beneficial to improve the purity of the final target phase. The ultrasonic treatment is carried out under the protection of inert gas (argon, nitrogen, hydrogen, etc.), which can prevent oxidation.

[0019] The beneficial effects of the present application are:

[0020] 1) The present application discloses a sulfur-containing medium-high entropy MAX phase solid solution material, which has a chemical formula of M2SSn 0.1 C, wherein M is any three or more combinations of transition metal elements Ti, Nb, Cr, Mo, Ta, Zr and V. Compared with the existing sulfur-containing medium-high entropy MAX phase solid solution material, the sulfur-containing medium-high entropy MAX phase solid solution material of the present application introduces tin element in A site. Solid tin is in liquid phase after melting, and the thermal conductivity of high-temperature tin is high. Liquid tin can quickly transfer mass and heat, making heating more sufficient and conducive to controlling the synthesis of target phase.

[0021] 2) The present application synthesizes sulfur-containing medium-high-entropy MAX phase solid solution materials by self-propagating high-temperature synthesis, which is more environmentally friendly than traditional solid solution reaction techniques, and can realize the preparation of medium-high-entropy MAX solid solution materials in seconds (1-10 s), greatly reducing the synthesis cost, improving the preparation efficiency, and increasing the yield.

[0022] 3) The sulfur-containing medium-high-entropy MAX phase solid solution material of the present application has good application potential in catalysis, sensors, electronic devices, supercapacitors, batteries, wave-absorbing materials, corrosion-resistant materials, and superconducting materials. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 XRD pattern of the sulfur-containing medium-high-entropy MAX phase solid solution material prepared in Example 1-3;

[0024] Figure 2 Raman spectrum of the sulfur-containing medium-high-entropy MAX phase solid solution material prepared in Example 1-3;

[0025] Figure 3 Scanning electron micrograph of the sulfur-containing medium-high-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 C prepared in Example 1;

[0026] Figure 4 Scanning electron micrograph of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C prepared in Example 2;

[0027] Figure 5 Scanning electron micrograph of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C prepared in Example 3. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be further described below in combination with the drawings and specific examples.

[0029] It should be understood that the one or more steps mentioned in the present application do not exclude other methods and steps before and after the combination steps, or other methods and steps can be inserted between these explicitly mentioned steps. It should also be understood that these examples are only for illustration of the present application and not for limiting the scope of the present application. Unless otherwise specified, the numbering of each method step is only for the purpose of identifying each method step, not for limiting the arrangement order of each method or defining the scope of the implementation of the present application, and the change or adjustment of the relative relationship can also be considered as the scope of the implementation of the present application without substantial technical content change. The raw materials and instruments used in the examples are not specifically limited in source, and can be purchased in the market or prepared according to the conventional method well known to those skilled in the art.

[0030] Example 1

[0031] Preparation of sulfur-containing medium-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 C

[0032] (1) According to the stoichiometric ratio in (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 C, the Ti, Nb, V, S, Sn and graphite powders are weighed and added to the ball milling tank, the ball-to-material ratio is 2:1, argon is filled in the tank, and the ball milling is carried out at a speed of 300 rpm for 3 h to obtain the powder;

[0033] (2) The powder is added to a graphite crucible coated with boron nitride on the inner surface and pressed into a block, and then placed into a self-propagating high-temperature reaction furnace, the pressure in the furnace is maintained at 0.35-0.4 MPa, ignited by tungsten wire, and the blocky material is synthesized by self-propagating high-temperature reaction under argon protection, with a yield of 96%;

[0034] (3) The blocky material is crushed by a ball mill, the ball-to-material ratio is 3:1, the ball milling speed is 300 rpm, and the ball milling is carried out for 3 h, and then sieved through a 400 mesh sieve to obtain the solid solution powder material;

[0035] (4) The solid solution powder material is treated with 1 mol / L hydrochloric acid for 12 h, washed with water to neutralize, then dimethyl sulfoxide is added, and ultrasonic treatment is carried out under nitrogen protection (the frequency of ultrasonic treatment is 40 KHz, and the time is 24 h), and finally centrifuged, dried to obtain the sulfur-containing medium-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 C.

[0036] The sulfur-containing medium-high-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 The XRD pattern of C is shown in Figure 1 It can be seen that the target product has characteristic peaks at 15.94°, 32.05°, 40.31°, 48.91°, and 57.26°, which correspond to the standard cards (002), (100), (103), (006), and (110) crystal faces, respectively.

[0037] The sulfur-containing medium-high-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 The Raman spectrum of C is shown in Figure 2 Two obvious peaks can be observed at 110 and 250-300 cm -1 , which correspond to and vibration modes, respectively.

[0038] The sulfur-containing medium-high-entropy MAX phase solid solution material (Ti 1 / 3 Nb 1 / 3 V 1 / 3 )2S1Sn 0.1 The scanning electron microscope image of C is shown in Figure 3 It can be found that the synthesized powder has a typical MAX phase layered structure.

[0039] Example 2

[0040] The sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C was prepared according to the following steps:

[0041] (1) According to the stoichiometric ratio in (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C, Ti, Nb, V, Zr, S, Sn, and graphite powders were weighed and added to a ball milling tank. The ball-to-material ratio was 2:1, argon was filled in the tank, and the powder was ball milled at a speed of 300 rpm for 3 h to obtain a powder;

[0042] (2) The powder is added to a graphite crucible coated with boron nitride on the inner surface and pressed into a block, and then put into a self-propagating high-temperature reaction kettle, the pressure in the kettle is kept at 0.35-0.4 MPa, ignited by a tungsten wire, and the blocky material is synthesized by self-propagating high-temperature reaction under the protection of argon, with a yield of 95%;

[0043] (3) The blocky material is crushed by a ball mill, the ball-to-material ratio is 3:1, the ball mill rotation speed is 300 rpm, and the ball milling time is 3 h, and then the material is sieved through a 400-mesh sieve to obtain a solid solution powder material;

[0044] (4) The solid solution powder material is treated with 1 mol / L hydrochloric acid for 12 h, washed with water to neutralize, then dimethyl sulfoxide is added, and ultrasonic treatment is carried out under the protection of nitrogen (the ultrasonic treatment frequency is 40 KHz, and the time is 24 h), and finally centrifuged and dried to obtain a sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C.

[0045] The XRD pattern of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C prepared in Example 2 is shown in Figure 1 It can be seen that the target product has characteristic peaks at positions of 15.65°, 31.61°, 39.67°, 47.87°, and 56.48°, which correspond to standard cards (002), (100), (103), (006), and (110) crystal faces, respectively.

[0046] The Raman spectrum of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C prepared in Example 2 is shown in Figure 2 Two obvious peaks can be observed at 109 and 250-300 cm -1 , which correspond to and vibration modes, respectively.

[0047] The scanning electron microscope image of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2S1Sn 0.1 C prepared in Example 2 is shown inFigure 4 It can be seen that the synthesized powder presents a typical MAX phase layered structure.

[0048] Example 3

[0049] Preparation of sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C, the steps are as follows:

[0050] (1) According to the stoichiometric ratio in (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C, weigh the Ti, Nb, V, Zr, Cr, S, Sn powder and graphite powder, add them to the ball mill tank, the ball-to-material ratio is 2:1, fill argon in the tank, and mill at a speed of 300 rpm for 3 h to obtain the powder;

[0051] (2) Put the powder into a graphite crucible coated with boron nitride on the inner surface and press into a block, then put it into a self-propagating high-temperature reaction furnace, keep the pressure in the furnace at 0.35-0.4 MPa, use tungsten wire to ignite, and synthesize the blocky material by self-propagating high-temperature reaction under argon protection, the yield is 93%;

[0052] (3) Crush the blocky material with a ball mill, the ball-to-material ratio is 3:1, the ball milling speed is 300 rpm, and the ball milling time is 3 h, then sieve through a 400 mesh sieve to obtain the solid solution powder material;

[0053] (4) Treat the solid solution powder material with 1 mol / L hydrochloric acid for 12 h, then wash with water until neutral, add dimethyl sulfoxide, and perform ultrasonic treatment under nitrogen protection (the ultrasonic treatment frequency is 40 KHz, and the time is 24 h), finally centrifuge, dry, and obtain the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C.

[0054] The XRD pattern of the sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 C prepared in Example 3 is shown inFigure 1 It can be seen that the target product has characteristic peaks at 15.26°, 31.29°, 39.53°, 48.77°, 55.95°, which correspond to the standard cards (002), (100), (103), (006), (110) crystal faces, respectively.

[0055] The sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 The Raman spectrum of C is shown in Figure 2 Two obvious peaks can be observed at 109, 250-300 cm -1 , which correspond to and vibration modes, respectively.

[0056] The sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2S1Sn 0.1 The scanning electron microscope image of C is shown in Figure 5 , wherein Figure 5 A is an electron micrograph under a scale of 1 μm, Figure 5 B is an electron micrograph under a scale of 500 nm, and it can be seen that the synthesized powder has a typical MAX phase layered structure.

[0057] Example 4

[0058] The sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Mo 1 / 5 )2S1Sn 0.1 C was prepared according to the following steps:

[0059] (1) According to the stoichiometric ratio in (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Mo 1 / 5 )2S1Sn 0.1 C, Ti, Nb, V, Zr, Mo, S, Sn and graphite powders were weighed and added to a ball milling tank, the ball-to-material ratio was 2:1, argon was filled in the tank, and the powder was obtained by ball milling at a speed of 300 rpm for 3 h;

[0060] (2) The powder is added to a graphite crucible coated with boron nitride on the inner surface and pressed into a block, and then placed into a self-propagating high-temperature reaction kettle, the pressure in the kettle is kept at 0.35-0.4 MPa, ignited by a tungsten wire, and a blocky material is synthesized by self-propagating high-temperature reaction under the protection of argon;

[0061] (3) The blocky material is crushed by a ball mill, the ball-to-material ratio is 3:1, the ball milling speed is 300 rpm, ball milling is performed for 3 h, and then the material is sieved through a 400-mesh sieve to obtain a solid solution powder material;

[0062] (4) The solid solution powder material is treated with 1 mol / L hydrochloric acid for 12 h, washed with water to neutralize, then dimethyl sulfoxide is added, and ultrasonic treatment is performed under the protection of nitrogen (the frequency of ultrasonic treatment is 40 KHz, and the time is 24 h), and finally centrifuged, dried, to obtain a sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Mo 1 / 5 )2S1Sn 0.1 C.

[0063] Example 5

[0064] A sulfur-containing high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Ta 1 / 5 )2S1Sn 0.1 C is prepared, and the steps are as follows:

[0065] (1) According to the stoichiometric ratio in (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Ta 1 / 5 )2S1Sn 0.1 C, Ti, Nb, V, Zr, Ta, S, Sn powder and graphite powder are weighed and added to a ball mill pot, the ball-to-material ratio is 2:1, argon is filled in the pot, and ball milling is performed at a speed of 300 rpm for 3 h to obtain a powder;

[0066] (2) The powder is added to a graphite crucible coated with boron nitride on the inner surface and pressed into a block, and then placed into a self-propagating high-temperature reaction kettle, the pressure in the kettle is kept at 0.35-0.4 MPa, ignited by a tungsten wire, and a blocky material is synthesized by self-propagating high-temperature reaction under the protection of argon;

[0067] (3) The blocky material is crushed by a ball mill, the ball-to-material ratio is 3:1, the ball milling speed is 300 rpm, ball milling is performed for 3 h, and then the material is sieved through a 400-mesh sieve to obtain a solid solution powder material;

[0068] (4) The solid solution powder material is treated with 1 mol / L hydrochloric acid for 12 h, washed with water to neutral after the end, then dimethyl sulfoxide is added, and ultrasonic treatment is carried out under nitrogen protection (the frequency of ultrasonic treatment is 40 KHz, and the time is 24 h), finally centrifugation, drying, and obtaining a high-sulfur high-entropy MAX phase solid solution material (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Ta 1 / 5 )2S1Sn 0.1 C.

Claims

1. A method for preparing a sulfur-containing medium-high entropy MAX phase solid solution material, characterized in that, The chemical formula of the sulfur-containing high-entropy MAX phase solid solution material is M2S1Sn. 0.1 C, where M is any combination of three or more of the transition metal elements Ti, Nb, Cr, Mo, Ta, Zr and V; The preparation method of the sulfur-containing high-entropy MAX phase solid solution material includes the following steps: (1) Add M powder, S powder, Sn powder and graphite powder into a ball mill jar in a molar ratio of 2:1:0.1:1 and ball mill under an argon atmosphere to obtain powder; (2) The powder is added into a graphite crucible with boron nitride coated on the inner surface and pressed into a block. Then it is placed in a self-propagating high-temperature reactor, ignited with tungsten wire, and synthesized into a block material through self-propagating high-temperature reaction under argon protection. (3) The block material is crushed by ball mill and then sieved to obtain solid solution powder material; (4) The solid solution powder material was acid etched, washed with water until neutral, and then dimethyl sulfoxide was added for ultrasonic treatment. After the treatment, it was centrifuged and dried to obtain sulfur-containing high-entropy MAX phase material.

2. The method for preparing sulfur-containing high-entropy MAX phase solid solution material as described in claim 1, characterized in that, The sulfur-containing high-entropy MAX phase solid solution material is (Ti 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Cr 1 / 5 )2 S1Sn 0.1 C, (Ti) 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Ta 1 / 5 )2S1Sn 0.1 C, (Ti) 1 / 5 Nb 1 / 5 V 1 / 5 Zr 1 / 5 Mo 1 / 5 )2S1Sn 0.1 C, (Ti) 1 / 4 Nb 1 / 4 V 1 / 4 Zr 1 / 4 )2 S1Sn 0.1 C or (Ti) 1 / 3 Nb 1 / 3V 1 / 3 )2 S1Sn 0.1 C.

3. The method for preparing the sulfur-containing high-entropy MAX phase material as described in claim 1, characterized in that, In step (1), the ball-to-material ratio of the ball mill is 2:1, the ball milling speed is 300 rpm, and the time is 2-4 hours.

4. The preparation method of the sulfur-containing high-entropy MAX phase material as described in claim 1, characterized in that, In step (2), the pressure in the reactor is maintained at 0.35-0.4 MPa during the self-propagating high-temperature reaction.

5. The method for preparing the sulfur-containing high-entropy MAX phase material as described in claim 1, characterized in that, In step (3), the ball-to-material ratio of the ball mill is 3:1, the ball milling speed is 300 rpm, and the time is 2-4 hours.

6. The method for preparing the sulfur-containing high-entropy MAX phase material as described in claim 1, characterized in that, In step (4), the acid etching treatment uses 1 mol / L hydrochloric acid and lasts for 10-15 hours.

7. The method for preparing the sulfur-containing high-entropy MAX phase material according to any one of claims 1 to 6, characterized in that, In step (4), the ultrasonic treatment is carried out under inert gas protection, the frequency of the ultrasonic treatment is 40KHz, and the time is 24h.

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