WO2022239210A1 - Matériau particulaire composé de nouvelles nanofeuilles de mxène, dispersion contenant ledit matériau particulaire et procédé de production dudit matériau particulaire - Google Patents

Matériau particulaire composé de nouvelles nanofeuilles de mxène, dispersion contenant ledit matériau particulaire et procédé de production dudit matériau particulaire Download PDF

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WO2022239210A1
WO2022239210A1 PCT/JP2021/018297 JP2021018297W WO2022239210A1 WO 2022239210 A1 WO2022239210 A1 WO 2022239210A1 JP 2021018297 W JP2021018297 W JP 2021018297W WO 2022239210 A1 WO2022239210 A1 WO 2022239210A1
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mxene
particle material
mass
particulate material
particle
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Japanese (ja)
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仁俊 佐藤
実 長田
雄己 新井
達也 前野
亘孝 冨田
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株式会社アドマテックス
国立大学法人東海国立大学機構
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Priority to PCT/JP2021/018297 priority patent/WO2022239210A1/fr
Publication of WO2022239210A1 publication Critical patent/WO2022239210A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • 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
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a novel particle material composed of MXene nanosheets, a dispersion containing the particle material, and a method for producing the same.
  • MXene particle material a particle material made of an MXene layered compound obtained by removing Al from a MAX phase ceramic powder such as Ti 3 AlC 2 which is a layered compound by acid treatment
  • MXene particle material a particle material made of an MXene layered compound obtained by removing Al from a MAX phase ceramic powder such as Ti 3 AlC 2 which is a layered compound by acid treatment
  • MXene particle material a particle material made of an MXene layered compound obtained by removing Al from a MAX phase ceramic powder such as Ti 3 AlC 2 which is a layered compound by acid treatment
  • MXene particle material a layered compound by acid treatment
  • MAX phase ceramics are layered compounds, and the general formula is expressed as M n+1 AX n .
  • M is a transition metal (Ti, Sc, Cr, Zr, Nb, etc.)
  • A is an A group element
  • X is C or [C (1.0-x) N x (0 ⁇ x ⁇ 1.0)]
  • n is from 1 to 3.
  • the average thickness is 3.5 nm to 20 nm and the average size is 0.05 by bead mill treatment using 10 ⁇ m to 300 ⁇ m beads in ethanol or isopropanol (IPA). It is disclosed that MXene particulate material of ⁇ m to 0.3 ⁇ m is obtained without removing the unexfoliated portion by centrifugation.
  • MXene thin film When a dense thin film that is oriented and laminated along the C-axis is produced using the particle material of the present invention, electromagnetic waves will penetrate from the C-axis direction, and the electromagnetic waves will surely pass through MXene. It can be an electromagnetic wave shield thin film.
  • the MXene thin film may be formed on the thin film using metal plating or metal particle ink.
  • an MXene thin film may be formed on an organic film in which metal particles are dispersed.
  • the obtained nanosheet particle material exfoliated to the MXene single layer level is easily oxidized as it is, so it was desired to extend the life for industrial application.
  • the present invention has been completed in view of the above circumstances, and an object to be solved is to provide a novel particulate material made of MXene nanosheets, a dispersion containing the particulate material, and a method for producing the same.
  • the particle material of the present invention that solves the above problems is Ti 3 Al having an average thickness of 1.0 to 3.5 nm, an average size of 1.5 to 2.0 ⁇ m, and an interlayer distance of the (002) plane of 1.350 nm to 1.400 nm.
  • a particulate material having an MXene nanosheet material composed of a (C x N 1-x ) 2 , x 0.97-0.70, and a greater than 0.02.
  • the dispersion liquid of the present invention that solves the above problems is the above-mentioned particle material, the above-mentioned particle material is dispersed at 0.1% by mass to 0.4% by mass, and dimethyl sulfoxide (DMSO) is dispersed at 50% by mass or more. It is a dispersion liquid having a medium. It is more preferable to contain 100% by mass of dimethylsulfoxide (DMSO).
  • the method for producing a particulate material according to the present invention comprises a bead mill using beads of 10 ⁇ m to 300 ⁇ m, a dispersion medium containing 50% by mass or more of water, and a particle concentration of 10.0 mg/mL to 20.0 mg/ml.
  • a method for producing a particulate material composed of MXene nanosheets which includes a peeling step of exfoliating the MXene to form a peeled material by colliding microbeads between the layers of the mixture with the MXene dispersed in the dispersion medium in mL. is.
  • the dispersion medium preferably contains 80% by mass or more of water. It is more preferable to contain 100% by mass of water.
  • the particle material of the present invention provides a particle material made of MXene with a small thickness and a large size by having the above configuration. Furthermore, the dispersion liquid of the present invention can hold the particle material composed of MXene in a very stable state by having the above-described structure. With the above configuration, the method for producing a particulate material of the present invention can obtain a particulate material composed of MXene that is small in thickness and large in thickness.
  • FIG. 1 is AFM images of exfoliated products of Examples 1 and 2 and Comparative Example 1.
  • FIG. It is a SEM photograph of exfoliation of each example and a comparative example.
  • 2 shows XRD profiles of Examples 1 and 2 and Comparative Examples 1 and 3.
  • FIG. 4 is a spectrum showing the wavelength dependence of the transmittance of thin films obtained by spin-coating the exfoliated materials of Examples 1 and 2 and Comparative Example 1.
  • FIG. In (a) to (c), the number of spin coatings is 1, 2, 3, 4, and 5 from the top.
  • the particulate material, method for producing the same, and dispersion of the present invention will be described in detail below based on embodiments.
  • the particle material of the present embodiment is a particle material made of MXene having a small thickness and a large size, and is excellent in electrical properties such as conductivity.
  • the small and large thickness of the particulate material allows the formation of C-axis oriented, laminated, dense, and conductive thin films.
  • the obtained thin film can be applied as a conductive thin film, an electromagnetic wave shielding thin film, and the like.
  • the MXene thin film can also be formed on a substrate plated with metal, on a thin film made with metal particle ink, or on an organic film in which metal particles are dispersed.
  • the particulate material of the present embodiment is a particulate material made of MXene that is large and flakes for application to electromagnetic wave shielding thin films, conductive thin film materials, and the like.
  • MXene exfoliated particulate material is obtained by exfoliating MXene, which is a powdery layered compound.
  • the particulate material of the present embodiment is plate-like, leaf-like, flake-like, sheet-like, and the like. They are collectively called sheet-like.
  • the particle material of the present embodiment is MXene, which is a layered compound consisting of three layers of titanium and two layers of carbon, or a layered compound in which part of carbon is replaced with nitrogen.
  • a particulate material consisting of MXene represented by the composition formula Ti3Ala ( CxN1 -x ) 2 . where x 0.97-0.70 and a>0.02.
  • the upper limit of a is preferably 0.05. (hereinafter referred to as "MXene” as appropriate).
  • it can have O, OH, and halogen groups as surface functional groups.
  • the stacking direction of the layers of the layered compound is defined as "thickness”, and the direction perpendicular to the thickness is defined as “sheet spreading direction”, and the value measured in this direction is the particle material of the present embodiment. It's size.
  • the thickness of MXene can be measured by dropping MXene onto a hydrophilized Si wafer and performing AFM analysis.
  • the average thickness is 1.0 to 3.5 nm, preferably 1.50 to 2.00 nm.
  • the average thickness is calculated as the average of the values measured on 100 randomly selected particles.
  • the size of nanosheets can be measured by dropping MXene onto a hydrophilized Si wafer and observing it with SEM.
  • the average size of the nanosheet in the spreading direction is 1.5 to 2.0 ⁇ m, preferably 1.50 to 1.70 ⁇ m.
  • the interlayer distance of the (002) plane of MXene can be measured by X-ray diffraction analysis, and is preferably 1.350 nm to 1.400 nm. More preferably from 1.350 nm to 1.370 nm.
  • the zeta potential of MXene at pH 6 to pH 8 in water is preferably in the range of -29.0 mV to -34.0 mV.
  • the method for producing the particulate material of this embodiment has a peeling step and other necessary steps.
  • This exfoliated material suspension can be directly subjected to the mixing step, or can be subjected to the mixing step after removing the dispersion medium.
  • the method for obtaining layered MXene as a material is not particularly limited, but the following methods can be exemplified.
  • Ti 3 Al a (C x N 1-x ) 2 , x 0.97 to 0.70, a is more than 0.02.
  • the raw material to be subjected to the peeling step can employ those having the same composition as the material constituting the aforementioned particulate material.
  • the composition does not substantially change in the stripping process.
  • This particulate material is acid-treated to dissolve a portion of Al to form MXene, which is used to mix in a water-based solvent to form a mixture, followed by high-speed An exfoliate suspension in which sheet-like exfoliated material of MXene is suspended is obtained by the exfoliation step of rotating bead mill treatment.
  • the dispersion medium for the stripping step is not particularly limited except that it contains 50% by mass or more of water, but may contain alcohols such as methanol, ethanol, isopropanol, methyl ethyl ketone, acetone ketones, dimethylformamide, dimethyl sulfoxide, and the like. can.
  • alcohols such as methanol, ethanol, isopropanol, methyl ethyl ketone, acetone ketones, dimethylformamide, dimethyl sulfoxide, and the like.
  • lower limits for water content include 60% by mass, 70% by mass, 80% by mass, 90% by mass, and 100% by mass.
  • the concentration of MXene in the mixture for the stripping process is not particularly limited, but can be about 10.0 mg/mL to 20.0 mg/mL. Although there are no particular restrictions on the liquid properties of the mixed liquid, the pH can be adjusted to approximately 6.0 to 8.0.
  • the lower limit of the bead size can be 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 30 ⁇ m, 40 ⁇ m
  • the upper limit can be 300 ⁇ m, 200 ⁇ m, 100 ⁇ m.
  • it is 10 ⁇ m or more, it is easy to classify beads and slurry.
  • the use of beads of 300 ⁇ m or less allows delamination to proceed in preference to reducing the size of the particulate material. Any combination of these lower and upper limits can be adopted. If the size of the beads is in the proper range, the energy to be applied can be increased and the peeling can proceed preferentially.
  • the material of the beads is not particularly limited, but ceramics such as zirconia, alumina, and silicon nitride can be used. Partially stabilized zirconia, which has particularly high fracture toughness, is preferred.
  • Partially stabilized zirconia which has particularly high fracture toughness, is preferred.
  • Ball milling such as planetary ball milling with beads and balls greater than 300 ⁇ m, also favors exfoliation by reducing the size of the particulate material.
  • a peripheral speed of 6 m/sec to 12 m/sec can be adopted for the peripheral speed in the peeling process.
  • a peripheral speed of 8 m/sec to 10 m/sec is preferred. If it is 6 m/sec or more, the peeling efficiency is good, and if it is 12 m/sec or less, the application of excessive energy is suppressed, and the temperature rise of the obtained particle material can be suppressed, so that the surface of the obtained particle material is oxidized. Progression can be suppressed, and electrical resistance can be lowered.
  • a slurry feed rate of 100 mL/minute to 300 mL/minute can be adopted.
  • a slurry particle concentration of 20.0 mg/mL to 10.0 mg/mL can be adopted. More preferably 17.0 mg/mL to 10.0 mg/mL. More preferably 15.0 mg/mL to 10.0 mg/mL.
  • a condition of 20.0 mg/mL or less is preferable because peeling can proceed sufficiently, and classification by centrifugation or the like reduces the need to select a flaky particulate material. Furthermore, it becomes possible to keep the liquid particle size of the slurry small. When the amount is 10.0 mg/mL or more, the efficiency of peeling is improved.
  • the slurry temperature is preferably in the temperature range of 35°C or less. When the temperature is 35° C. or lower, surface oxidation can be suppressed, and the electrical resistance of the particulate material can be kept low.
  • 40% to 80% by volume can be used for the filling amount of beads. When it is 40% by volume or more, the efficiency of peeling is improved, and when it is 80% by volume or less, it becomes easy to classify beads and slurry. Whether or not the desired particle material containing many flaky particles is produced can be determined by observation with SEM, TEM, or the like. In particular, the thickness of the particulate material can be determined by AFM analysis. The particulate material obtained in the peeling step can be used after being classified by a method such as centrifugation, if necessary. Optimal conditions in the peeling process vary depending on the size of the apparatus, so these numerical values are not limited.
  • all the MXene becomes a stripped product by bead milling.
  • the peeling process is completed under the condition that all the MXene becomes the peeled material, it becomes possible to use the MXene that has not been peeled off without removing it.
  • MXene other than exfoliated matter it can be separated by centrifugation, filtration, or the like.
  • MXene in which part of the carbon sites are replaced with nitrogen, easily adsorbs OH groups in water, weakening the bond between layers. Therefore, the thickness and size of the resulting MXene can be controlled by varying the amount of nitrogen replaced.
  • x 0.85 to 0.70. 0.80 to 0.70 is more preferable. In both cases, a is over 0.02.
  • the amount of Al to be removed depends on the contact time with the acidic substance (acid aqueous solution, etc.) (the longer the time, the more removed), the concentration of the acidic substance (the higher the concentration, the more removed), It can be adjusted by changing the amount of acidic substance (the greater the absolute amount of acidic substance, the greater the amount that can be removed) and the contact temperature (the higher the temperature, the greater the amount removed).
  • the MAX-phase ceramic powder (A element is Al), which is a layered compound, is subjected to an acid treatment to remove part of the Al to form a layered compound having void layers that constitute the particle material.
  • an acidic substance in which hydrofluoric acid and hydrochloric acid are combined is employed as the acid for removing part of the Al layer.
  • a hydrofluoric acid salt KF, LiF, etc.
  • aqueous solutions of these acids are used as acidic substances.
  • the mixed concentration of hydrofluoric acid and hydrochloric acid formed when the fluoride salt is completely dissociated is not particularly limited.
  • the concentration of hydrofluoric acid the lower limit is about 1.7 mol/L, 2.0 mol/L, and 2.3 mol/L, and the upper limit is about 2.5 mol/L, 2.6 mol/L, and 2.7 mol/L. can.
  • the concentration of hydrochloric acid can be about 2.0 mol/L, 3.0 mol/L and 4.0 mol/L with lower limits and about 13.0 mol/L, 14.0 mol/L and 15.0 mol/L with upper limits. .
  • the mixing ratio (molar ratio) of hydrofluoric acid and hydrochloric acid formed when it is assumed that the fluoride salt is completely dissociated is not particularly limited, but the lower limit of hydrofluoric acid is 1:13, 1:12, 1:1: 11. About 1:5, 1:6 and 1:7 can be adopted as the upper limit.
  • the concentrations and mixing ratios of hydrofluoric acid and hydrochloric acid shown here can be used in arbitrary combinations.
  • the acid treatment temperature is preferably 10°C to 30°C. 10°C to 20°C is more preferred.
  • the resulting MXene nanosheet particle material was measured for zeta potential from pH 6 to pH 8 in water.
  • the zeta potential of pH 6 to pH 8 in water is all negative, and the acid treatment in water and the microbead mill treatment in water can adsorb hydrophilic functional groups such as OH and halogens, and the absolute value of the zeta potential is large. , means that more hydrophilic functional groups are adsorbed. If the absolute value of the zeta potential is too large, it will be pulverized into pieces by the applied physical force. The magnitude of the absolute value of the zeta potential is 29. It was found that thin and large MXene nanosheets were formed by adjusting the ratio from 0 to 34.0.
  • the amounts of Al, C, and N were calculated using atom % of Ti, Al, C, and N, with Ti being 3.
  • For chemical analysis weigh the sample in a platinum dish, add nitric acid + sulfuric acid + hydrofluoric acid, heat (about 120 ° C) to dissolve, and then heat at a high temperature (300 ° C) to mix nitric acid and hydrogen fluoride.
  • a sample solution sulfuric acid
  • the dispersion of this embodiment is obtained by dispersing the particulate material of this embodiment in a dispersion medium.
  • the particulate material dispersed in the dispersion liquid is MXene, which is easily oxidized, and normally cannot exist stably, but in this embodiment, it can stably exist for a long period of time. For this reason, it becomes possible to store the dispersion liquid for a long period of time, making it possible to dramatically expand the application fields of MXene.
  • MXene metal-oxidized sulfide
  • the dispersion medium contains dimethyl sulfoxide in an amount of 50% by mass or more, and particularly the lower limit of the content is 60% by mass, 70% by mass, 80% by mass, 90% by mass, 95% by mass, and 100% by mass. It is preferable that the content of dimethylsulfoxide is large, and it is particularly preferable that no dispersion medium other than dimethylsulfoxide is contained.
  • the composition of the dispersion medium that can be contained in addition to dimethylsulfoxide is not particularly limited, it is preferable that the dispersion medium contain hydrophilic properties. For example, ethanol and isopropyl alcohol can be included.
  • the content of dimethylsulfoxide can be 50% by mass or more, preferably 80% by mass or more, and preferably 90% by mass or more, based on the total mass of the dispersion medium. 100% by mass is more preferable.
  • it can contain no water.
  • the content of water can be 5% by mass or less, preferably 2% by mass or less, and 1% by mass or less, based on the total mass of the dispersion medium.
  • the concentration of particulate material in the dispersion of this embodiment is between 0.1% and 0.4% by weight.
  • Example 1 ⁇ Pretreatment process TiC powder (TI-30-10-0020, Raremetallic) 11.7g, TiN powder (TN-30-10-0020, Raremetallic) 0.6g, Ti powder (TIE07PB 3N, high purity Chemical) 4.9 g and Al powder (ALE15PB 3NG, Kojundo Chemical) 2.8 g were ball mill-mixed in isopropanol (IPA) for 12 hours, and the IPA was removed by an evaporator to obtain a uniformly mixed dry powder.
  • IPA isopropanol
  • the uniformly mixed dry powder was placed in an alumina crucible and fired under the conditions of 1450 ° C. for 2 h (heating rate 10 ° C./min) in an Ar stream to obtain Ti 3 Al (C) as MAX phase ceramics. 0.95 N 0.05 ) 2 was obtained.
  • the resulting Ti 3 Al(C 0.95 N 0.05 ) 2 was coarsely pulverized using a mortar and pestle, and then subjected to ball mill pulverization using 5 mm zirconia balls in IPA for 24 hours. Then, planetary ball mill pulverization (200 rpm, 15 minutes three times) using 0.5 mm zirconia balls was performed to obtain a suspension. IPA was removed from the suspension with an evaporator to obtain Ti 3 Al(C 0.95 N 0.05 ) 2 powder pulverized to about 3 ⁇ m.
  • An AFM image is shown in FIG. 100 exfoliated exfoliated products (nanosheets) were randomly sampled, and the average value of the thickness measured by AFM was obtained and shown in Table 1.
  • the result of SEM observation is shown in FIG. 100 exfoliated products were randomly selected, and the vertical (maximum diameter in the direction perpendicular to the thickness direction) and horizontal (direction perpendicular to the vertical and thickness directions) dimensions were measured from the SEM photograph, and the average value was calculated.
  • Table 1 shows the average value of the size of 100 exfoliated objects.
  • DMSO colloids The resulting DMSO suspension is centrifuged at 2400 G (3500 rpm) and the supernatant is collected (the supernatant is named DMSO colloids).
  • a piranha-treated glass plate (25 ⁇ 25 ⁇ 0.7 mm) was used as a substrate, and 20 ⁇ L of the solution was dropped and spin-coated at 4000 rpm for 1 minute to form a film.
  • FIG. 1 shows the results of measuring the surface electrical resistance after vacuum drying at 200°C for 24 hours.
  • Example 2 TiC powder (TI-30-10-0020, Rare Metallic) 9.2 g, TiN powder (TN-30-10-0020, Rare Metallic) 3.2 g, Ti powder (TIE07PB 3N, Kojundo Chemical) 4.9 g, Al A stripped product was prepared in the same manner as in Example 1, except that 2.8 g of powder (ALE15PB 3NG, Kojundo Chemical) was used as the starting material.
  • FIG. 1 shows AFM image
  • Table 1 shows average thickness and average size
  • Table 2 shows interlayer distance
  • Fig. 2 shows SEM image
  • Fig. 3 shows Ti3Al ( C0.75N0.25 ) 2 powder and Ti3Al0.02 obtained .
  • C 0.75 N 0.25 2 MXene XRD profile
  • FIG. 4 shows UV-vis results
  • Table 3 shows surface electrical resistance values.
  • Comparative example 1 Except that 12.3 g of TiC powder (TI-30-10-0020, Rare Metallic), 4.9 g of Ti powder (TIE07PB 3N, Kojundo Chemical), and 2.8 g of Al powder (ALE15PB 3NG, Kojundo Chemical) were used as starting materials.
  • Fig. 1 is AFM image
  • Table 1 is average thickness and average size
  • Table 2 is interlayer distance
  • Fig. 2 is SEM image
  • Fig. 3 is XRD profile of obtained Ti 3 AlC 2 powder and Ti 3 Al 0.02 C 2 MXene.
  • Table 3 shows the surface electrical resistance values.
  • Comparative Example 2 the particles were pulverized and did not form a sheet, and the average thickness and average size of the sheet could not be measured.
  • Comparative Example 3 in which only ethanol was used as the dispersion medium during the peeling process, the average thickness was large and the average size was small, and sufficient peeling could not be achieved. Furthermore, the interlayer distance of the (002) plane was also small. Using a dispersion medium containing water rather than using a dispersion medium that does not contain water in this way is better for obtaining thin and large nanosheets, and when peeling by a bead mill technique using microbeads. was found to be favorable.
  • MXene was exfoliated by ultrasonic irradiation, and a part of the exfoliated MXene nanosheets was collected by centrifugation.
  • a solvent is irradiated with ultrasonic waves, cavitation occurs, and due to the crushing of the cavitation, the layers that make up the layered compound are exfoliated by the mechanism of powder collision.
  • water which tends to cause cavitation, is used, the peeling progresses only partially.
  • pulverization takes precedence over exfoliation, and surface oxidation progresses, so MXene has not been studied at present.
  • the concentration of MXene particles of 10 mg/mL or more increases the efficiency of the stripping process, and the concentration of MXene particles of 20 mg/mL or less suppresses the remaining of the unstripped material and makes it a stripped material. made easier.

Abstract

La présente invention aborde le problème de la fourniture d'un matériau particulaire composé de nouvelles nanofeuilles de Mxène, une dispersion contenant le matériau particulaire, et un procédé de production du matériau particulaire.　Le matériau particulaire a une feuille de nanofeuille de MXène ayant une épaisseur moyenne de 1,0 à 3,5 nm et une taille moyenne de 1,5 à 2,0 µm, le matériau de nanofeuille de MXène étant conçu à partir de Ti3Ala(CxN1−x)2, la distance inter-couche du plan (002) étant comprise entre 1,350 et 1,400 nm, x = 0,97 - 0,70 et a dépasse 0,02, et le matériau de nanofeuille de MXène étant tel que le potentiel zêta d'un pH de 6 à un pH de 8 dans l'eau est compris entre −29,0 mV à −34,0 mV. La dispersion contient de 0,1 à 0,4 % en masse du matériau particulaire dispersé dans son sein, le diméthylsulfoxyde étant utilisé en tant que milieu de dispersion. Le procédé de production du matériau particulaire comprend une étape de détachement pour traiter un mélange d'un milieu de dispersion qui comprend 50 % en masse ou plus d'eau et de MXène dispersé dans le milieu de dispersion à une concentration de particules de 10-20 mg/mL dans un broyeur à billes à l'aide de billes de 10 à 300 µm, ce qui permet de détacher le MXène pour former un produit détaché.
PCT/JP2021/018297 2021-05-13 2021-05-13 Matériau particulaire composé de nouvelles nanofeuilles de mxène, dispersion contenant ledit matériau particulaire et procédé de production dudit matériau particulaire WO2022239210A1 (fr)

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US20140162130A1 (en) * 2011-06-21 2014-06-12 Drexel University Compositions comprising free-standing two-dimensional nanocrystals
WO2020136865A1 (fr) * 2018-12-28 2020-07-02 株式会社アドマテックス Matériaux particulaires de mxène, procédé de production de ces matériaux particulaires et batterie secondaire
WO2020136864A1 (fr) * 2018-12-28 2020-07-02 株式会社アドマテックス Matériau particulaire de mxène, suspension, batterie secondaire, électrode transparente, et procédé de production d'un matériau sous forme de particules de mxène

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140162130A1 (en) * 2011-06-21 2014-06-12 Drexel University Compositions comprising free-standing two-dimensional nanocrystals
WO2020136865A1 (fr) * 2018-12-28 2020-07-02 株式会社アドマテックス Matériaux particulaires de mxène, procédé de production de ces matériaux particulaires et batterie secondaire
WO2020136864A1 (fr) * 2018-12-28 2020-07-02 株式会社アドマテックス Matériau particulaire de mxène, suspension, batterie secondaire, électrode transparente, et procédé de production d'un matériau sous forme de particules de mxène

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