CN114621633B - Water-based MXene-based energy storage electrode material 3D printing ink, and preparation method and application thereof - Google Patents
Water-based MXene-based energy storage electrode material 3D printing ink, and preparation method and application thereof Download PDFInfo
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Abstract
The application discloses water system MXene base energy storage electrode material 3D prints printing ink, it includes: water without oxygen, MXene, auxiliary agent and active material of energy storage electrode. The application also discloses a preparation method of the 3D printing ink, which comprises the following steps: (1) Uniformly mixing a raw material system containing MXene, an auxiliary agent and an energy storage electrode active material with an oxygen-free water solvent to obtain a mixed solution; (2) And (2) carrying out ball milling treatment on the mixed liquid obtained in the step (1) under the inert gas atmosphere condition to obtain the water system MXene-based energy storage electrode material 3D printing ink. The application also discloses application of the 3D printing ink in a printing substrate. The 3D printing ink prepared by the method has the characteristics of environmental protection and excellent conductivity.
Description
Technical Field
The invention belongs to the technical field of 3D printing of electrochemical energy storage devices, and particularly relates to water-based MXene-based energy storage electrode material 3D printing ink, and a preparation method and application thereof.
Background
The 3D printing technology, also known as additive manufacturing, is a new manufacturing technology that builds up material layer by layer to manufacture a physical object based on a digital model. 3D printing has the unique advantage of enabling rapid manufacturing of arbitrary complex shapes, as compared to conventional manufacturing techniques, and is therefore used in a variety of fields. The 3D printing technology can be classified into different printing methods according to different materials, which include: fused Deposition Modeling (FDM), selective Laser Sintering (SLS), stereolithography (SLA), layered Object Modeling (LOM), direct Ink Writing (DIW), and the like. The DIW is a pre-designed three-dimensional structure constructed by directly extruding and stacking printing ink with shear thinning performance layer by layer, and the technology has been widely applied in a plurality of fields due to the characteristics of low cost, convenient forming and the like, and has made a certain progress in the field of electrochemical energy storage in recent years. In the DIW technology, the quality of the ink directly affects the performance of the printing device, so the innovation of the ink is helpful for the development of the 3D printing technology. Although there are many 3D printing conductive inks reported in the literature, there are still many problems, such as the use of organic solvents as the solvent, and poor conductivity of the ink. Therefore, there is a need in the art to develop an environmentally friendly and highly conductive 3D printing ink.
Disclosure of Invention
In order to solve the above problems, the present inventors found that MXene material is a class of inorganic compounds having a two-dimensional layered structure, which is composed of transition metal carbide, nitride or carbonitride with a thickness of several atomic layers, and has been increasingly widely used in supercapacitors, batteries, electromagnetic interference shields, composite materials, and the like due to its unique structural properties, electronic characteristics and chemical properties. For example, unlike conventional batteries, the material provides more channels for the movement of ions, greatly increasing the speed of the movement of ions. Meanwhile, the MXene material has good dispersibility in water and stable performance, so that the MXene material can be used for preparing various conductive inks. Based on the above, the inventor of the application prepares the water-based MXene-based energy storage electrode material 3D printing ink which has the characteristics of environmental protection and excellent conductivity.
Specifically, according to one aspect of the application, the application provides a water-based MXene-based energy storage electrode material 3D printing ink, and the 3D printing ink comprises water without oxygen, MXene, an auxiliary agent and an energy storage electrode active material.
Optionally, the 3D printing ink comprises, by weight, 40 to 80 parts of oxygen-free water, 10 to 40 parts of MXene,1 to 5 parts of an auxiliary agent, and 10 to 60 parts of an energy storage electrode active material.
Optionally, the 3D printing ink comprises, by weight, 40 to 80 parts of oxygen-free water, 10 to 40 parts of MXene,1 to 5 parts of an auxiliary agent, and 10 to 40 parts of an energy storage electrode active material.
Optionally, the fraction of oxygen-free water in the 3D printing ink is any of 40, 60, 65, 70, 75, 80, or a range of values defined by any two values, or any value within a range of values defined by any two values, by weight.
Optionally, the number of parts of MXene in the 3D printing ink is any of 10, 20, 30, 40, or a range of values defined by any two of the values, or any value within a range of values defined by any two of the values, by weight.
Optionally, in the 3D printing ink, the number of the auxiliary agent is any of 1, 2.5, 3, 3.5, 4, and 5, or a range of values defined by any two of the above values, or any value within a range of values defined by any two of the above values.
Optionally, in the 3D printing ink, the fraction of the energy storage electrode active material is any of 10, 30, 35, 40, 50, 60, or is a value in a range defined by any two values, or is any value within a range defined by any two values.
Optionally, the 3D printing ink consists of oxygen-free water, MXene, an adjuvant and an energy storage electrode active material.
Optionally, the MXene comprises Ti 3 C 2 、Ti 3 CN and Mo 2 C.
Optionally, the auxiliary agent comprises one or more of methylcellulose, hydroxyethyl cellulose, sodium alginate, sodium carboxymethyl cellulose, polyvinyl alcohol, polyethylene oxide, phenolic resin, polyacrylic resin, and polyvinylpyrrolidone.
Optionally, the energy storage electrode active material comprises at least one of a supercapacitor electrode active material, a lithium ion battery electrode active material, a sodium ion battery electrode active material, and a zinc ion battery electrode active material.
Optionally, the supercapacitor electrode active material comprises one or more of carbon materials such as activated carbon, graphene, carbon nanotubes and the like.
Optionally, the lithium ion battery electrode active material comprises one or more of graphite, hard carbon, soft carbon, silicon carbon, lithium titanate, lithium iron phosphate, lithium cobaltate, lithium iron phosphate, lithium manganate, a ternary material, and a lithium-rich manganese-based material.
Optionally, the sodium ion battery electrode active material comprises one or more of hard carbon, black phosphorus, sodium titanate, sulfide, sodium manganate, sodium vanadium phosphate, prussian blue and sodium vanadium phosphate fluoride.
Optionally, the zinc-ion battery electrode active material comprises one or more of zinc powder, vanadium oxide, manganese dioxide, sodium vanadium phosphate, zinc manganate.
According to another aspect of the application, the application also provides a preparation method of the water-based MXene-based energy storage electrode material 3D printing ink, and the method comprises the following steps:
(1) Uniformly mixing a raw material system containing MXene, an auxiliary agent and an energy storage electrode active material with an oxygen-free water solvent to obtain a mixed solution;
(2) And (2) carrying out ball milling treatment on the mixed liquid obtained in the step (1) under the inert gas atmosphere condition to obtain the water system MXene-based energy storage electrode material 3D printing ink.
The specific types of MXene, additives and energy storage electrode active materials used in the methods of the present application are as described above and will not be described herein.
The parts by weight of the oxygen-containing water, the MXene, the auxiliary agent and the energy storage electrode active material in the method are as described above, and are not described in detail herein.
Optionally, the method comprises the steps of:
a) Adding MXene, an energy storage electrode active material and an auxiliary agent into a ball milling tank;
b) Adding deoxygenated water into a ball milling tank, adding grinding balls, and quickly replacing air in the ball milling tank with inert gas;
c) And (4) performing ball milling treatment quickly to obtain the water-based MXene-based energy storage electrode material 3D printing ink.
Optionally, in the ball milling treatment, the ball-to-material ratio is 2.
Alternatively, the oxygen-free aqueous solvent is obtained by bubbling oxygen-containing water with an inert gas before step (1).
Optionally, the ball-to-feed ratio is any value of 2.
Optionally, the ball material ratio is the mass ratio of the grinding ball to the mixed material comprising MXene, the auxiliary agent, the energy storage electrode active material and oxygen-free water.
Optionally, the inert gas comprises at least one of nitrogen and argon.
Optionally, in the ball milling treatment, the ball milling time is 10 to 80min, and the ball milling rotation speed is 100 to 600r/min.
Alternatively, the method is carried out at ambient temperature.
Alternatively, the method uses MXene in the form of a solid powder or in the form of an aqueous solution of MXene. Whether MXene is a solid powder or an aqueous solution of MXene is used to prepare a water based MXene based energy storing electrode material 3D printing ink, the parts by weight of oxygen free water in the final 3D printing ink are as described above.
According to a further aspect of the application, the application provides the application of the water-based MXene-based energy storage electrode material 3D printing ink or the water-based MXene-based energy storage electrode material 3D printing ink prepared according to the method in a printing substrate.
Optionally, the substrate comprises one or more of a PET substrate, a PI substrate, a metal substrate, a rubber substrate, and a plant fiber rich substrate.
Optionally, the metal substrate comprises one or more of a copper foil, an aluminum foil, and a stainless steel substrate.
Optionally, the plant fiber-rich substrate comprises A4 paper and/or wood board.
The water in the "aqueous MXene solution" in this application refers to water free of oxygen and the "substrate rich in plant fibres" refers to a substrate in which the content of plant fibres is at least 50% of the total content.
In the application, the ternary material refers to a multi-metal composite oxide represented by lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminate, can fully exert the advantages of three metals, has high battery energy density, and is one of the main positive electrode materials of the power battery. "lithium-rich manganese-based material" refers to a material having the general formula "xLi 2 MnO 3 ·(1～x)LiMO 2 Wherein, 0<x<1, M is one of Ni, co and Mn ".
For Ti in the present application 3 C 2 T x ，T x Represents a terminating functional group on the few-layer MXene nano-sheets, wherein the terminating functional group is selected from fluorine, carboxyl or hydroxyl. "
The beneficial effects that this application can produce include:
1) The preparation method of the 3D printing ink is simple to operate, mild in condition and environment-friendly because only water is used as a solvent.
2) The preparation method of the water-based MXene-based energy storage electrode material 3D printing ink provided by the application is carried out at normal temperature in the preparation process, so that the preparation method is mild in condition.
3) The water-based MXene-based energy storage electrode material 3D printing ink prepared by the method contains MXene and an energy storage electrode active material, so that the prepared 3D printing ink has excellent conductivity, and a micro battery prepared from the ink has excellent electrochemical performance.
4) The water-based MXene-based energy storage electrode material 3D printing ink prepared by the method is stable in chemical property, and can be mixed with various electrode materials to prepare conductive ink.
5) The water-system MXene-based energy storage electrode material 3D printing ink prepared by the method has good shear rheological property and is easy to print.
6) The auxiliary agent in the water-based MXene-based energy storage electrode material 3D printing ink prepared by the method helps to improve the adhesion between the prepared 3D printing ink and a substrate.
Drawings
Fig. 1 shows a TEM image of MXene nanoplatelets according to example 1 of the present invention.
Fig. 2 shows a schematic diagram of a lithium ion planar battery prepared from a water-based MXene-based energy storage electrode material 3D printing ink according to example 4 of the present invention.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The endpoints of the ranges and any values disclosed in the present application are not limited to the precise range or value, and such ranges or values should be understood to include proximity to such ranges or values. For numerical ranges, the endpoints of each of the ranges and the individual points between each may be combined with each other to give one or more new numerical ranges, and these numerical ranges should be considered as specifically disclosed herein.
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The endpoints of the ranges and any values disclosed in the present application are not limited to the precise range or value and should be understood to include proximity to such ranges or values. For numerical ranges, the endpoints of each of the ranges and the individual points between each may be combined with each other to give one or more new numerical ranges, and these numerical ranges should be considered as specifically disclosed herein.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
MXene of the present application was purchased commerciallyCommercially available or prepared by methods known in the art, e.g. Ti 3 C 2 Prepared using the method of Selective Etching of Silicon from Ti3SiC2 (MAX) To octain 2D Titanium Carbide (MXene) 3 CN by document Ti 3 CN, nat. Commun.,2019,10,1795, mo 1.33 C, prepared by the method in the literature High-Performance Ultrathin Flexible Solid-State Supercapacitors Based on Solution Processable Mo1.33C MXene and PEDOT PSS.
The ball milling method is realized through ball milling equipment commonly used in the field in the embodiment of the application, and the 3D printing in the embodiment of the application is realized through a 3D printer commonly used in the field.
Unless otherwise specified, percentages (%) in the examples of the present application are by weight.
The JEM-2100 transmission electron microscope used for TEM photographs in the examples of the present application was tested under the following test conditions: firstly, a sample is dispersed in absolute ethyl alcohol under the action of ultrasonic oscillation, then the dispersed liquid is dripped on a common carbon supporting film or a micro-grid, and after the sample is dried, a TEM test can be carried out.
The electrochemical performance test equipment in the application example is as follows: electrochemical workstation (CHI 760E).
Example 1
Mixing 30 parts of MXene (Mo) 1.33 C) (the shape of the nano-sheet is shown in figure 1), 35 parts of graphite and 3 parts of polyvinylpyrrolidone are mixed and then placed into a ball milling pot, and 70 parts of solvent water for removing oxygen by using nitrogen is added; then 600 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 When the viscosity is about 7000Pa.s, the viscosity of the water-based MXene-based graphite electrode material is 3D printing ink.
Printing the obtained printing ink through a 3D printing device, printing the printing ink on a copper foil to obtain an electrode of a lithium ion battery, assembling the electrode into a button battery by taking a lithium sheet as a counter electrode, and using the electrolyte as commercial electrolyte of the lithium ion battery. The printing parameters are as follows: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. At 1C (coulomb)) Under the condition, the surface capacity of the lithium ion battery is tested to be 1.64mAh/cm 2 . Therefore, the prepared water-based MXene-based graphite electrode material 3D printing ink has excellent conductivity, and a lithium ion battery assembled by the ink has excellent electrochemical performance.
Example 2
40 parts of MXene (Ti) 3 CN), 40 parts of sodium titanate and 4 parts of hydroxyethyl cellulose, and then putting the mixture into a ball milling pot, and adding 75 parts of solvent water deoxidized by nitrogen; and then 1000 parts of grinding balls are put into the ball mill, the air in the ball mill tank is replaced by nitrogen, then the ball mill tank is covered and placed on the ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 The viscosity was about 8000Pa.s, and the aqueous MXene-based sodium titanate electrode material 3D printing ink was used.
Printing the obtained printing ink by a 3D printing device, printing the printing ink on PET, PI, glass and copper foil, wherein the printing parameters comprise: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. A button cell is assembled by using the aqueous MXene-based sodium titanate electrode material ink printed on the copper foil as an electrode of a sodium ion battery and a sodium sheet as a counter electrode, wherein the electrolyte is a commercial electrolyte of the sodium ion battery. Under the condition of 1C (coulomb), the surface capacity of the sodium-ion battery is tested to be 0.83mAh/cm 2 . Therefore, the prepared ink has excellent conductivity, and a sodium ion battery assembled by the ink has excellent electrochemical performance.
Example 3
Mixing 20 parts of MXene (Ti) 3 C 2 ) Mixing with 40 parts of sodium vanadium phosphate fluoride and 2.5 parts of sodium alginate, putting into a ball milling tank, and adding 60 parts of solvent water deoxidized by nitrogen; and then 1000 parts of grinding balls are put into the ball mill, the air in the ball mill tank is replaced by nitrogen, then the ball mill tank is covered and placed on the ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 When the ink is used, the viscosity is about 5000Pa.s, and the water-based MXene-based sodium vanadium phosphate fluoride electrode material is printed in a 3D mode.
Printing the obtained printing ink by a 3D printing device, printing the printing ink on A4, glass and an aluminum foil, wherein the printing parameters comprise: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s.A button cell is assembled by using water-based MXene-based vanadium sodium phosphate fluoride electrode material ink printed on an aluminum foil as an electrode of a sodium ion battery and a sodium sheet as a counter electrode, wherein the electrolyte is a commercial electrolyte of the sodium ion battery. Under the condition of 1C (coulomb), the surface capacity of the sodium-ion battery is tested and tested to be 0.72mAh/cm 2 . Therefore, the prepared ink has excellent conductivity, and a sodium ion battery assembled by the ink has excellent electrochemical performance.
Example 4
30 parts of MXene (Ti) 3 C 2 ) Mixing the lithium titanate, 40 parts of lithium titanate and 3 parts of sodium carboxymethylcellulose, putting the mixture into a ball milling tank, and adding 65 parts of solvent water for removing oxygen by using nitrogen; and then 1200 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 revolutions per minute. A shear rate of 0.01s was obtained -1 When the viscosity is about 8000Pa.s, the water-based MXene-based lithium titanate electrode material is used as the 3D printing ink.
30 parts of MXene (Ti) 3 C 2 ) Mixing the mixture with 40 parts of lithium iron phosphate and 3 parts of sodium carboxymethylcellulose, putting the mixture into a ball milling tank, and adding 65 parts of solvent water for removing oxygen by using nitrogen; and then 1200 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 revolutions per minute. A shear rate of 0.01s was obtained -1 And 3D printing ink of water-based MXene-based lithium iron phosphate electrode material with the viscosity of about 8000Pa.s.
Can print the 3D printing ink of the obtained water system MXene base lithium titanate electrode material and the 3D printing ink of the water system MXene base lithium iron phosphate electrode material through a 3D printing device, print to PET and A4 paper, print the parameter and be including: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. The obtained water-based MXene-based lithium titanate electrode material 3D printing ink and the water-based MXene-based lithium iron phosphate electrode material 3D printing ink are respectively printed on a PET substrate to obtain a negative electrode and a positive electrode of a lithium ion battery, the number of the printing layers is 1, and a commercial lithium ion electrolyte is used as an electrolyte to form the lithium ion planar battery (the schematic diagram is shown in figure 2). Testing the face capacity of the lithium ion planar battery under the condition of 1C (coulomb)The amount is 0.76mAh/cm 2 . Therefore, the prepared ink has excellent conductivity, and the lithium ion planar battery assembled by the ink has excellent electrochemical performance.
Example 5
Mixing 40 parts of MXene (Ti) 3 C 2 ) Mixing with 30 parts of molybdenum sulfide and 4 parts of methyl cellulose, putting into a ball milling tank, and adding 70 parts of solvent water deoxidized by nitrogen; and then 1200 parts of grinding balls are put in the ball mill, the air in the ball mill tank is replaced by nitrogen, then the ball mill tank is covered and placed on the ball mill, and ball milling is carried out for 30min at 200 r/min. A viscosity shear rate of 0.01s was obtained -1 And the viscosity is about 10000Pa.s, and the water-based MXene-based molybdenum sulfide electrode material is used for 3D printing ink.
Mixing 40 parts of MXene (Ti) 3 C 2 ) Mixing with 30 parts of sodium vanadium phosphate and 4 parts of methyl cellulose, putting into a ball milling tank, and adding 70 parts of solvent water deoxidized by nitrogen; and then 1200 parts of grinding balls are put in the ball mill, the air in the ball mill tank is replaced by nitrogen, then the ball mill tank is covered and placed on the ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 The viscosity of the water-based MXene-based sodium vanadium phosphate electrode material is about 10500Pa.s.
The obtained water system MXene-based molybdenum sulfide electrode material 3D printing ink and the water system MXene-based vanadium sodium phosphate electrode material 3D printing ink can be printed on PET and glass through a 3D printing device, and the printing parameters comprise: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. And respectively printing the obtained water-based MXene-based molybdenum sulfide electrode material 3D printing ink and the water-based MXene-based vanadium sodium phosphate electrode material 3D printing ink on a PET substrate to obtain the cathode and the anode of the sodium ion planar battery, wherein the number of printing layers is 1, and the electrolyte is commercial electrolyte of the sodium ion battery. Under the condition of 1C (coulomb), the surface capacity of the sodium ion planar battery is 0.49mAh/cm 2 . Therefore, the prepared ink has excellent conductivity, and the sodium ion planar battery assembled by the ink has excellent electrochemical performance.
Example 6
40 parts of MXene (Ti) 3 C 2 ) 60 parts of zinc powder and 5 parts ofMixing methylcellulose, putting into a ball milling tank, and adding 80 parts of solvent water subjected to oxygen removal by using nitrogen; and then 500 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 r/min. A viscosity shear rate of 0.01s was obtained -1 And when the ink is used, the viscosity of the aqueous MXene-based zinc powder electrode material is about 12000Pa.s.
Mixing 40 parts of MXene (Ti) 3 C 2 ) Mixing with 25 parts of manganese dioxide and 3 parts of methyl cellulose, putting into a ball milling tank, and adding 60 parts of solvent water deoxidized by nitrogen; and then 500 parts of grinding balls are put in the ball mill, the air in the ball mill tank is replaced by nitrogen, then the ball mill tank is covered and placed on the ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 The viscosity of the water-based MXene-based manganese dioxide electrode material is about 12000Pa.s.
Can print water system MXene base zinc powder electrode material 3D printing ink and water system MXene base manganese dioxide electrode material 3D printing ink through 3D printing device, print to PI, plank on, print the parameter and be including: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. Respectively printing the obtained water-based MXene-based zinc powder electrode material 3D printing ink and the water-based MXene-based manganese dioxide electrode material 3D printing ink on a PI substrate to obtain a negative electrode and a positive electrode of the zinc-manganese planar battery, wherein the number of printing layers is 1, and 2MZnSO is adopted 4 0.5 M MnSO 4 Is an electrolyte. Under the condition of 1C (coulomb), the surface capacity of the zinc-manganese planar battery is tested to be 0.16mAh/cm 2 . Therefore, the prepared ink has excellent conductivity, and the zinc-manganese planar battery assembled by the ink has excellent electrochemical performance.
Example 7
Mixing 40 parts of MXene (Ti) 3 CN), 40 parts of activated carbon and 3.5 parts of phenolic resin are mixed and then put into a ball milling pot, and 60 parts of solvent water deoxidized by nitrogen is added; and then 700 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 Aqueous MXene-based active carbon electrode material with viscosity of 12000Pa.s3D printing ink.
The obtained water system MXene-based active carbon electrode material 3D printing ink can be printed by a 3D printing device and is printed on PI and PET, and the printing parameters comprise: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. Printing the obtained water system MXene-based activated carbon electrode material 3D printing ink on PET to obtain two electrodes of a supercapacitor, wherein the number of printing layers is 1, an electrolyte is a 20M LiCl aqueous solution, and constant-current charging and discharging are carried out at 0.5mA/cm 2 The surface capacity of the tested super capacitor under the condition is 364mF/cm 2 . Therefore, the prepared ink has excellent conductivity, and the supercapacitor assembled by the ink has excellent electrochemical performance.
Example 8
Mixing 40 parts of MXene (Ti) 3 C 2 ) Mixing with 40 parts of activated carbon and 3.5 parts of polyvinylpyrrolidone, putting into a ball milling tank, and adding 60 parts of solvent water deoxidized by nitrogen; and then 1000 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 And the viscosity of the water-based MXene-based activated carbon electrode material is about 11000Pa.s, so that the ink can be printed in a 3D manner.
Mixing 30 parts of MXene (Ti) 3 C 2 ) Mixing the lithium titanate, 50 parts of lithium titanate and 4 parts of polyvinylpyrrolidone, putting the mixture into a ball milling tank, and adding 60 parts of solvent water deoxidized by nitrogen; and then 1000 parts of grinding balls are put in, the air in the ball milling tank is replaced by nitrogen, then the ball milling tank is covered and placed on a ball mill, and ball milling is carried out for 30min at 200 r/min. A shear rate of 0.01s was obtained -1 The viscosity of the aqueous MXene-based lithium titanate electrode material is about 11000Pa.s.
The obtained water system MXene-based activated carbon electrode material 3D printing ink and the water system MXene-based lithium titanate electrode material 3D printing ink can be printed on PET through a 3D printing device, and the printing parameters comprise: the air pressure is 5-20 psi, and the printing speed is 2-10 mm/s. Printing the obtained water-system MXene-based activated carbon electrode material 3D printing ink and the water-system MXene-based lithium titanate electrode material 3D printing ink on PET to obtain lithiumThe number of printing layers of the two electrodes of the ionic plane capacitor is 1, and the electrolyte is commercial lithium ion electrolyte. The constant current charging and discharging is 0.5mA/cm 2 The surface capacity of the lithium ion planar capacitor tested under the condition is 136mF/cm 2 . Therefore, the prepared ink has excellent conductivity, and the lithium ion planar capacitor assembled by the ink has excellent electrochemical performance.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (11)
1. The application of the water-based MXene-based energy storage electrode material 3D printing ink in a printing substrate is characterized in that the 3D printing ink comprises oxygen-free water, MXene, an auxiliary agent and an energy storage electrode active material;
the MXene comprises Ti 3 C 2 、Ti 3 CN、Mo 1.33 C and Mo 2 At least one of C;
the auxiliary agent comprises one or more of methylcellulose, hydroxyethyl cellulose, sodium alginate, sodium carboxymethylcellulose, polyvinyl alcohol, polyethylene oxide, phenolic resin, polyacrylic resin and polyvinylpyrrolidone;
the energy storage electrode active material comprises at least one of a super capacitor electrode active material, a lithium ion battery electrode active material, a sodium ion battery electrode active material and a zinc ion battery electrode active material;
the electrode active material of the super capacitor comprises one or more of active carbon, graphene and carbon nano tubes;
the lithium ion battery electrode active material comprises one or more of graphite, hard carbon, soft carbon, silicon carbon, lithium titanate, lithium iron phosphate, lithium cobaltate, lithium manganate, a ternary material and a lithium-rich manganese-based material;
the sodium ion battery electrode active material comprises one or more of hard carbon, black phosphorus, sodium titanate, sulfide, sodium manganate, sodium vanadium phosphate, prussian blue and sodium vanadium phosphate fluoride;
the zinc ion battery electrode active material comprises one or more of zinc powder, vanadium oxide, manganese dioxide, sodium vanadium phosphate and zinc manganate;
the 3D printing ink comprises 40-80 parts of water without oxygen, 10-40 parts of MXene, 1-5 parts of auxiliary agent and 10-60 parts of energy storage electrode active material.
2. Use according to claim 1, characterized in that,
the 3D printing ink comprises 40-80 parts of water without oxygen, 10-40 parts of MXene, 1-5 parts of auxiliary agent and 10-40 parts of energy storage electrode active material.
3. Use according to claim 1, characterized in that the 3D printing ink consists of oxygen-free water, MXene, coagent and energy storage electrode active material.
4. The application of claim 1, wherein the preparation method of the water-based MXene-based energy storage electrode material 3D printing ink comprises the following steps:
(1) Uniformly mixing a raw material system containing MXene, an auxiliary agent and an energy storage electrode active material with oxygen-free water to obtain a mixed solution;
(2) And (2) carrying out ball milling treatment on the mixed liquid obtained in the step (1) under the inert gas atmosphere condition to obtain the water system MXene-based energy storage electrode material 3D printing ink.
5. The use according to claim 4, wherein in the ball milling treatment, the ball-to-material ratio is 2 to 1 to 10.
6. Use according to claim 4, wherein the oxygen-free water is obtained by bubbling oxygen-containing water with an inert gas before step (1).
7. The use of claim 4, wherein the inert gas comprises at least one of nitrogen and argon.
8. The application of the method as claimed in claim 4, wherein in the ball milling treatment, the ball milling time is 10 to 80min, and the ball milling rotation speed is 100 to 600r/min.
9. The use according to claim 1, wherein the substrate comprises one or more of a PET substrate, a PI substrate, a metal substrate, a rubber substrate and a plant fiber rich substrate.
10. The use of claim 9, wherein the metal substrate comprises one or more of a copper foil, an aluminum foil, and a stainless steel substrate.
11. Use according to claim 9, wherein the plant fibre rich substrate comprises A4 paper and/or wood board.
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