CN114430033A - Composite material, manufacturing method thereof, electrode, battery and electronic equipment - Google Patents
Composite material, manufacturing method thereof, electrode, battery and electronic equipment Download PDFInfo
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- CN114430033A CN114430033A CN202011187088.4A CN202011187088A CN114430033A CN 114430033 A CN114430033 A CN 114430033A CN 202011187088 A CN202011187088 A CN 202011187088A CN 114430033 A CN114430033 A CN 114430033A
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- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 73
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 239000006185 dispersion Substances 0.000 claims description 58
- 239000000203 mixture Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000004108 freeze drying Methods 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 8
- 210000001787 dendrite Anatomy 0.000 abstract description 4
- 150000002500 ions Chemical group 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000007800 oxidant agent Substances 0.000 description 5
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009210 therapy by ultrasound Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 229910009818 Ti3AlC2 Inorganic materials 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/381—Alkaline or alkaline earth metals elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The disclosure provides a composite material, a manufacturing method thereof, an electrode, a battery and electronic equipment. The composite material comprises an Mxene material, graphene and metal, wherein the Mxene material is of a sheet structure, the graphene and the metal are located between the sheet structures of the Mxene material, when the composite material is used for manufacturing an electrode, the graphene in the composite material is used for improving the conductivity and the multiplying power performance of the electrode, the Mxene material has a large specific surface area due to the fact that the Mxene material has a multi-layer sheet structure, the Mxene material is used for increasing the position where ion deposition can occur in the electrode, ion uniform deposition is facilitated, generation of ion dendrites is effectively inhibited, the use stability of the electrode is improved, and repeated cycle use of the electrode is facilitated.
Description
Technical Field
The disclosure relates to the technical field of shell manufacturing, and in particular relates to a composite material, a manufacturing method thereof, an electrode, a battery and electronic equipment.
Background
The secondary battery stores electric energy as chemical energy when charged, and converts the chemical energy into electric energy to output when discharged. The secondary battery includes an anode, a cathode, and an electrolyte, and is charged and discharged by cooperation between the anode, the cathode, and the electrolyte.
The performance of the electrode, which is one of the important structures of the secondary battery, affects the performance and use of the secondary battery. Therefore, it is an urgent technical problem for those skilled in the art to develop a high-performance electrode material, and to use the high-performance electrode material to manufacture an electrode to improve the performance of the electrode, and further improve the performance of the secondary battery.
Disclosure of Invention
The present disclosure provides an improved composite material, a method of making the same, an electrode, a battery, and an electronic device.
One aspect of the present disclosure provides a composite material comprising a Mxene material, graphene, and a metal;
the Mxene material is in a lamellar structure;
the graphene and the metal are located between the lamellar structures of the Mxene material.
Optionally, the metal comprises any one of: sodium, lithium, potassium.
Optionally, all of the metals are the sodium; the mass ratio of the Mxene material, the graphene and the metal in the composite material is 100 (10-100) to 1-50.
Another aspect of the present disclosure provides an electrode made of the composite material described above.
Another aspect of the present disclosure provides a battery including the electrode described above.
Another aspect of the present disclosure provides an electronic device including the battery described above.
Another aspect of the present disclosure provides a method of making a composite material, the method comprising:
making a first dispersion comprising dispersed Mxene material and a second dispersion comprising dispersed graphene;
mixing the first dispersion liquid and the second dispersion liquid, and drying a mixture formed by the first dispersion liquid and the second dispersion liquid to obtain a mixture of the Mxene material and the graphene;
and placing the mixture of the Mxene material and the graphene in molten metal to obtain the composite material.
Optionally, the concentration of the Mxene material in the first dispersion ranges from 1mg/mL to 20 mg/mL;
the concentration range of the graphene in the second dispersion liquid is 1mg/mL-10 mg/mL.
Optionally, the mass ratio of the Mxene material in the first dispersion to the graphene in the second dispersion ranges from 1:1 to 10: 1.
Optionally, the drying the mixture of the first dispersion and the second dispersion comprises:
freeze-drying the mixture of the first dispersion and the second dispersion.
The embodiment of the disclosure provides a novel composite material, the composite material comprises an Mxene material, graphene and metal, the Mxene material is of a sheet structure, the graphene and the metal are located between the sheet structures of the Mxene material, when the composite material is used for manufacturing an electrode, the graphene in the composite material is used for improving the conductivity and the rate capability of the electrode, the Mxene material has a large specific surface area due to the fact that the Mxene material has a multi-layer sheet structure, the Mxene material is used for increasing the position of ion deposition in the electrode, ion uniform deposition is facilitated, generation of ion dendrites is effectively inhibited, the use stability of the electrode is improved, and repeated cycle use of the electrode is facilitated.
Drawings
FIG. 1 is a flow chart illustrating a method of making a composite material according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprises" or "comprising" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The MAX phase is a generic name for a class of ternary layered carbide and nitride ceramic materials having a uniform chemical formula Mn+1AXnWherein M is a transition metal element, A is a group III element or a group IV element, and X is a C atom or an N atom.
The Mxene material is a two-dimensional material having a structure similar to graphene and is obtained by exfoliation of a lamellar ceramic MAX phase. Mxene materials are two-dimensional materials composed of carbides and nitrides of transition metals. The Mxene material has elasticity and has better electrical, mechanical and thermal properties.
The embodiment of the disclosure provides a novel composite material, which comprises a Mxene material, graphene and a metal, wherein the Mxene material is in a lamellar structure, and the graphene and the metal are located between the lamellar structure of the Mxene material.
When the composite material is used for manufacturing the electrode, the graphene in the composite material is used for improving the conductivity and the rate capability of the electrode, the Mxene material has a large specific surface area due to the fact that the Mxene material has a multilayer lamellar structure, the Mxene material is used for increasing the position of the electrode where ion deposition can occur, the uniform deposition of ions is facilitated, the generation of ion dendrites is effectively inhibited, the conductivity, the rate capability and the use stability of the electrode can be improved when the composite material provided by the embodiment of the disclosure is used for manufacturing the electrode, and the recycling use of the electrode is facilitated.
In an embodiment, the metal comprising the composite material may comprise any one of: sodium, lithium, potassium.
In one embodiment, when the composite material comprises all the metals of sodium, the mass ratio of the Mxene material, the graphene and the metals in the composite material can be in the range of 100 (10-100) to (1-50).
For example, the mass ratio of Mxene material to graphene may be any of: 100:10, 100:20, 100:25, 100:30, 100:40, 100:50, 100:70, 100:75, 100:80, 100:90, 100: 100; the mass ratio of Mxene material to metal may be any of: 100:1, 100:5, 100:10, 100:20, 100:25, 100:30, 100:40, 100:45, 100: 50; the mass ratio of the Mxene material, the graphene and the metal in the composite material can be any one of the following: 100:10:1, 100:10:20, 100:10:35, 100:10:50, 100:30:1, 100:30:30, 100:30:50, 100:50:50, 100:70:25, 100:75:30, 100:80:40, 100:85:40, 100:90:50, 100:100: 50.
When the amount of the Mxene material, the graphene and the metal satisfy the above range, the performance of the composite material is good.
The embodiment of the disclosure also provides an electrode which is made of the composite material provided by the embodiment of the disclosure.
The cathode or the anode of the battery can be made of the composite material provided by the above embodiments of the present disclosure according to the operation principle of the battery. For example, a negative electrode of a sodium ion battery is made using a metallic sodium-Mxene material-graphene composite material, a negative electrode of a lithium ion battery is made using a metallic lithium-Mxene material-graphene composite material, and a negative electrode of a potassium ion battery is made using a metallic potassium-Mxene material-graphene composite material.
Based on the characteristics of the composite material, the electrode made of the composite material has good conductivity, rate capability and use stability, and can be recycled for multiple times.
The embodiment of the disclosure also provides a battery, which comprises the electrode provided by the embodiment of the disclosure.
The battery may be a sodium ion battery, a lithium ion battery, a potassium ion battery, or the like.
Based on the advantages of using electrodes made of composite materials, batteries made of such electrodes have corresponding advantages.
The embodiment of the present disclosure further provides an electronic device, which includes the battery provided by the above embodiment of the present disclosure.
The electronic device provided by the embodiment of the present disclosure includes but is not limited to: cell phones, tablet computers, ipads, personal digital assistants, smart wearable devices, and the like.
Based on the advantages of the battery provided by the above embodiment of the present disclosure, the electronic device made of the battery has corresponding advantages.
The embodiment of the disclosure also provides a manufacturing method of the composite material, and the method is used for manufacturing the composite material provided by the embodiment of the disclosure. Fig. 1 is a flow chart illustrating a method of making a composite material according to an exemplary embodiment of the present disclosure, and referring to fig. 1, the method of making a composite material includes the steps of:
in step 101, a first dispersion comprising dispersed Mxene material and a second dispersion comprising dispersed graphene are prepared.
In one embodiment, titanium aluminum carbide is oxidized using an oxidizing agent to provide a first dispersion comprising Mxene material.
The titanium aluminum carbide may be
And the like.
The oxidizing agent may include a fluorine-containing agent. For example, hydrofluoric acid HF, or lithium fluoride LiF and hydrochloric acid HCl for the generation of HF.
The method comprises the steps of oxidizing titanium aluminum carbide by using an oxidizing agent, removing aluminum in the titanium aluminum carbide, obtaining a mixture which comprises impurities such as an unreacted oxidizing agent and the like besides the Mxene material, washing and centrifuging the obtained mixture to remove the impurities to obtain a pure Mxene material, and dispersing the obtained Mxene material in deionized water to obtain a first dispersion liquid.
When the oxidizing agent comprises an acidic agent, the resulting mixture may have residual acidic agent, rendering the mixture acidic. The resulting mixture was washed until the pH of the supernatant reached 6 or more, at which point washing was stopped, and the solid Mxene material was isolated and dispersed in deionized water to give a first dispersion.
Parameters such as the kind of the detergent, the number of washing, the number of rotation at the time of centrifugation, and the number of centrifugation can be set as required. For example, the mixture may be washed with deionized water.
In step 102, the first dispersion and the second dispersion are mixed, and the mixture formed by the first dispersion and the second dispersion is dried to obtain a mixture of the Mxene material and the graphene.
In one embodiment, the mixture of the first dispersion and the second dispersion may be freeze dried.
The Mxene material has a lamellar structure, after the first dispersion liquid and the second dispersion liquid are mixed, the graphene is located between the lamellar structures of the Mxene material, the original morphological characteristics between the Mxene material and the graphene can be well kept by adopting a freeze drying method, and finally the high-performance composite material is prepared.
In one embodiment, the concentration of the Mxene material in the first dispersion can range from 1mg/mL to 20 mg/mL. For example, the concentration of the Mxene material in the first dispersion may be any of: 1mg/mL, 2mg/mL, 5mg/mL, 6mg/mL, 8.5mg/mL, 10mg/mL, 12mg/mL, 15mg/mL, 15.5mg/mL, 18mg/mL, 20 mg/mL.
The concentration of graphene in the second dispersion may range from 1mg/mL to 10 mg/mL. For example, the concentration of graphene in the second dispersion may be any of: 1mg/mL, 2mg/mL, 3mg/mL, 5mg/mL, 5.5mg/mL, 6mg/mL, 7.5mg/mL, 8mg/mL, 9mg/mL, 10 mg/mL.
In an embodiment, the mass ratio of the Mxene material in the first dispersion to the graphene in the second dispersion may range from 1:1 to 10: 1. For example, the mass ratio of the Mxene material in the first dispersion to the graphene in the second dispersion may be any of: 1:1, 2:1, 3:1, 3.5:1, 4:1, 5:1, 6:1, 6.5:1, 7:1, 8:1, 8.5:1, 9:1, 10: 1.
In step 103, a mixture of Mxene material and graphene is placed in a molten state of metal to obtain a composite material.
The molten metal may be molten sodium, molten potassium, molten lithium, or the like.
The Mxene material in the composite material is of a lamellar structure, the graphene and the metal are located between lamellar structures of the Mxene material, when the composite material is used for manufacturing an electrode, the graphene in the composite material is used for improving the conductivity and the multiplying power performance of the electrode, the Mxene material has a large specific surface area due to the fact that the Mxene material has a multi-layer lamellar structure, the Mxene material is used for increasing the position, where ion deposition can occur, in the electrode, the uniform deposition of ions is facilitated, the generation of ion dendrites is effectively inhibited, therefore, the use stability of the electrode is improved, and the electrode can be recycled for multiple times.
The following examples illustrate methods for making composite materials provided by embodiments of the present disclosure.
Making a first dispersion comprising Mxene material: adding HCl (12mo/L, 10mL) to LiF (0.99g), stirring for 5min to generate HF, and adding Ti3AlC2(1g) Slowly adding the powder into the liquid, adding Ti3AlC2The liquid is placed in a water bath and kept at 35 ℃ for 24 hours, then ultrasonic treatment is carried out, deionized water is used for washing the mixture after ultrasonic treatment, the mixture after washing is subjected to centrifugal treatment, multiple times of washing and centrifugal treatment are carried out until the pH value of supernatant reaches above 6, a relatively pure Mxene material is obtained through filtration and other modes, the obtained relatively pure Mxene material is mixed with the deionized water, after the Mxene material is dispersed in the deionized water, a first dispersion liquid containing the Mxene material is obtained, and the concentration range of the Mxene material in the first dispersion liquid is 1-20 mg/mL.
Preparation of Mxene material-graphene mixture: and mixing the second dispersion liquid containing the graphene with the prepared first dispersion liquid according to a certain proportion, carrying out ultrasonic treatment at room temperature for 10min, and carrying out freeze drying on the ultrasonic dispersion liquid to obtain the Mxene material-graphene mixture.
Wherein the concentration range of the graphene in the second dispersion liquid is 1-10mg/ml, and the mass ratio of the Mxene material in the first dispersion liquid to the graphene in the second dispersion liquid is any one of the following items: 1:1, 1:2, 1:3, 1:4,
the second dispersion may be prepared experimentally or may be purchased commercially.
Composite metal sodium: and under an inert environment, placing the Mxene material-graphene mixture in molten metal sodium to obtain the metal sodium-Mxene material-graphene composite material.
The above embodiments of the present disclosure may be complementary to each other without conflict.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A composite material, comprising an Mxene material, graphene and a metal;
the Mxene material is in a lamellar structure;
the graphene and the metal are located between the lamellar structures of the Mxene material.
2. The composite material of claim 1, wherein the metal comprises at least one of: sodium, lithium, potassium.
3. The composite material of claim 2, wherein all of the metals are the sodium; the mass ratio of the Mxene material, the graphene and the metal in the composite material is 100 (10-100) to 1-50.
4. An electrode made from the composite material of any one of claims 1-3.
5. A battery comprising the electrode of claim 4.
6. An electronic device comprising the battery of claim 5.
7. A method of making the composite material of any one of claims 1-3, comprising:
making a first dispersion comprising dispersed Mxene material and a second dispersion comprising dispersed graphene;
mixing the first dispersion liquid and the second dispersion liquid, and drying a mixture formed by the first dispersion liquid and the second dispersion liquid to obtain a mixture of the Mxene material and the graphene;
and placing the mixture of the Mxene material and the graphene in molten metal to obtain the composite material.
8. The method of claim 7, wherein the concentration of the Mxene material in the first dispersion is in the range of 1mg/mL to 20 mg/mL;
the concentration range of the graphene in the second dispersion liquid is 1mg/mL-10 mg/mL.
9. The method of claim 7, wherein the mass ratio of the Mxene material in the first dispersion to the graphene in the second dispersion is in the range of 1:1 to 10: 1.
10. The method of claim 7, wherein said drying the mixture of the first dispersion and the second dispersion comprises:
freeze-drying the mixture of the first dispersion and the second dispersion.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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