KR102429677B1 - Nanoporous lithium-metal oxide particles and manufacturing method thereof - Google Patents

Abstract

Nanoporous lithium-metal oxides are disclosed. The nanoporous lithium-metal oxide is prepared by applying microwaves, and has high porosity and homogeneous pore size and particle size distribution, so it shows excellent output characteristics and stability, and can be used as a synthesis method for next-generation energy storage electrode materials.

Description

Nanoporous lithium-metal oxide particles and manufacturing method thereof

The present invention relates to a nanoporous lithium-metal oxide, in particular, to a nanoporous lithium-metal oxide used as a material for a cathode or anode of a battery for a mobile IT device, an electric vehicle (EV), and an energy storage device (ESS).

Lithium secondary batteries are used as medium and large energy storage for electric vehicles, from small home appliances such as smartphones and laptops. In addition, since the Paris Climate Agreement in 2015, more than 200 countries, including developing countries, have become obligated to reduce greenhouse gas emissions. The ban is expected to increase the global demand for electric vehicles. As of 2016, the anode and anode materials market was $6.3 billion, and is expected to reach $15 billion in 2020.

Spinel Li ₄ Ti ₅ O ₁₂ (LTO) has a high operating voltage (1.55-1.56 V vs Li/Li+) and has very little volume change of 0.1% or less when lithium ions are intercalated and desorbed. It is attracting attention as a material for anode or cathode for lithium ion batteries. However, in general, LTO produced in the dry process can be made by calcining the reactive precursor at a high temperature (800~1000℃) for a long time (12~24h). Therefore, the energy consumption for LTO production is significantly high, and the formed non-homogeneous micro-sized LTO has poor actual output characteristics due to low electronic and lithium ion conductivity.

Accordingly, the present inventors developed a nano-size Li-ion electrode synthesis method using microwaves for producing nano-sized spherical LTO particles for a short time at a relatively low temperature while researching to solve the above problems, and this synthesis method LTO can be manufactured in a short time by using less energy than the existing dry production method, and the synthesized material is micro-sized LTO with homogeneous pore size and particle size. , is expected to be utilized as a synthesis method for next-generation energy storage electrode materials.

The present invention has been devised to solve the above problems, and an embodiment of the present invention provides nanoporous lithium-metal oxide particles having a uniform pore size distribution.

In addition, another embodiment of the present invention provides a method for preparing the nanoporous lithium-metal oxide particles.

In addition, another embodiment of the present invention provides an electrode for an electronic device including the nanoporous lithium-metal oxide.

In addition, another embodiment of the present invention provides an adsorbent comprising the nanoporous lithium-metal oxide.

In addition, another embodiment of the present invention provides a catalyst including the nanoporous lithium-metal oxide.

However, the technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. it could be

As a technical means for achieving the above-described technical problem, an aspect of the present invention is,

Nanoporous lithium-metal oxide particles, wherein the particles have a pore size of W ₅₀ ± 1.0 nm in the range of 30% to 70% of the distribution ratio of the pore size distribution curve. Nanoporous lithium-metal oxide particles to provide.

W ₅₀ means the pore size when the distribution ratio is 50% in the distribution curve of the pore size of the nanoporous lithium-metal oxide particles.

The lithium-metal oxide is lithium titanate (LTO), lithium vanadium oxide (LVO), lithium-vanadium phosphate (LVP), lithium cobalt oxide, lithium nickel oxide, lithium manganese It may be one selected from the group consisting of oxides, lithium nickel-cobalt-manganese composite oxides, and mixtures thereof.

The particles may have a particle size of (0.5 to 10) x D ₅₀ in the range of 20% to 70% of the distribution rate of the particle size distribution curve.

D ₅₀ may mean a particle size when the distribution ratio is 50% in the distribution curve of the particle size of the nanoporous lithium-metal oxide particles.

The particles may have a D ₅₀ of 1.5 to 5.0 μm.

The particles may be spherical.

The nanoporous lithium-metal oxide particles may have a BET specific surface area of 50 m ² /g to 350 m ² /g.

The lithium-metal oxide particles may have an average pore size of greater than 0 and 6 nm or less.

The nanoporous lithium-metal oxide particles may have a total pore volume of 0.05 cm ³ /g to 0.3 cm ³ /g.

The lithium-metal oxide particles may have a micropore volume of 0.005 cm ³ /g to 0.05 cm ³ /g.

The particles may be formed by applying microwaves.

In addition, another aspect of the present invention,

preparing a precursor mixture by mixing a lithium precursor and a metal precursor in a solvent; preparing a lithium-metal oxide by applying microwaves to the precursor mixture; and filtering the prepared lithium-metal oxide to obtain a lithium-metal oxide in powder form; it provides a method for producing nanoporous lithium-metal oxide particles comprising a.

The lithium precursor may include a monovalent lithium cation.

The metal precursor may be a titanium precursor or a vanadium precursor.

The solvent may be a glycol solvent.

The mixing may include mixing the lithium precursor and the metal precursor in a molar ratio of 1:5 to 5:1.

The microwave may be applied at a temperature of 100°C to 350°C.

The microwave may be applied for 0.5 to 5 hours.

In addition, another aspect of the present invention provides an electrode for an electronic device including the nanoporous lithium-metal oxide particles.

In addition, another aspect of the present invention provides an adsorbent comprising nanoporous lithium-metal oxide particles.

In addition, another aspect of the present invention provides a catalyst comprising nanoporous lithium-metal oxide particles.

According to an embodiment of the present invention, since the nanoporous lithium-metal oxide particles have a homogeneous pore size and particle size distribution, they show excellent output characteristics and stability, and can be used as a synthesis method for next-generation energy storage electrode materials. .

In addition, the method for preparing the nanoporous lithium-metal oxide particles is efficient in terms of energy and time saving because it is possible to prepare the nanoporous lithium-metal oxide particles for a short time at a relatively low temperature.

The effects of the present invention are not limited to the above effects, and it should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 illustrates a manufacturing process of nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.
2 is a SEM image of nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.
3 is a graph showing the PXRD of nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.
4 is a graph showing the nitrogen adsorption isotherm of the nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.
5 is a graph showing the surface area and pore characteristics of the nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.
6 shows the ion adsorption characteristics of the nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail. However, the present invention may be embodied in various different forms, and the present invention is not limited by the embodiments described herein, and the present invention is only defined by the claims to be described later.

In addition, the terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the entire specification of the present invention, 'including' any component means that other components may be further included, rather than excluding other components, unless otherwise stated.

The first aspect of the present application is

Nanoporous lithium-metal oxide particles, wherein the particles have a pore size of W ₅₀ ± 1.0 nm in the range of 30% to 70% of the distribution ratio of the pore size distribution curve. Nanoporous lithium-metal oxide particles to provide.

W ₅₀ means the pore size when the distribution ratio is 50% in the distribution curve of the pore size of the nanoporous lithium-metal oxide particles.

Hereinafter, the nanoporous lithium-metal oxide particles according to the first aspect of the present application will be described in detail.

In one embodiment of the present application, the particles have a pore size of W ₅₀ ± 2.0 nm in the range of 30% to 70% of the distribution rate of the pore size distribution curve, preferably, a pore size of W ₅₀ ± 1.5 nm and, more preferably, it may be characterized as having a pore size of W ₅₀ ± 1.0 nm. This characteristic can be considered to appear because the nanoporous lithium-metal oxide particles of the present application are formed by applying microwaves. Since the pore size is relatively homogeneous, it may be excellent in terms of output characteristics and stability when used as an electrode material in an energy storage device.

In one embodiment of the present application, the lithium-metal oxide is lithium titanate (LTO), lithium vanadium oxide (LVO), lithium-vanadium phosphate (LVP), lithium cobalt oxide, It may be one selected from the group consisting of lithium nickel oxide, lithium manganese oxide, lithium nickel-cobalt-manganese composite oxide, and mixtures thereof.

In one embodiment of the present application, the particles may have a particle size of (0.5 to 10) x D ₅₀ in the range of 20% to 70% of the distribution rate of the particle size distribution curve. D ₅₀ may mean a particle size when the distribution ratio is 50% in the distribution curve of the particle size of the nanoporous lithium-metal oxide particles. These characteristics can also be considered to be exhibited because the nanoporous lithium-metal oxide particles of the present application are formed by applying microwaves, and since the particle size is relatively homogeneous, when used as an electrode material in an energy storage device, output characteristics and particularly stability aspects can be excellent in

In one embodiment of the present application, the particles may have a D ₅₀ of 0.5 to 20 μm, preferably 1.0 to 10 μm, more preferably 1.5 to 5.0 μm, even more preferably 1.6 to 4.2 μm. The particles may have a D ₅₀ of more preferably 1.8 μm to 3.2 μm.

In one embodiment of the present application, the particle shape is not limited, but may preferably be spherical.

In one embodiment of the present application, the BET specific surface area of the nanoporous lithium-metal oxide particles may be 50 m ² /g to 500 m ² /g, preferably 50 m ² /g to 400 m ² /g, It may be 50 m ² /g to 350 m ² /g.

In one embodiment of the present application, the lithium-metal oxide particles may have an average pore size of more than 0 and 6 nm or less, preferably 0.5 to 4.5 nm, more preferably 0.8 to 3.5 nm.

The nanoporous lithium-metal oxide particles may have a porous structure, and specifically, may include micropores and mesopores at the same time. In this case, the micropore volume of the nanoporous lithium-metal oxide particles may be 0.005 cm ³ /g to 0.05 cm ³ /g, preferably 0.008 cm ³ /g to 0.03 cm ³ /g, more preferably It may be 0.01 cm ³ /g to 0.02 cm ³ /g. In addition, the mesopore volume of the nanoporous lithium-metal oxide may be 0.005 cm ³ /g to 0.8 cm ³ /g, preferably 0.01 cm ³ /g to 0.5 cm ³ /g.

In one embodiment of the present application, the total pore volume of the nanoporous lithium-metal oxide particles may be defined as the sum of the micropore volume and the mesopore volume, and other pore volumes may be additionally included. Specifically, the total pore volume of the nanoporous lithium-metal oxide particles may be 0.03 cm ³ /g to 0.9 cm ³ /g, preferably 0.04 cm ³ /g to 0.6 cm ³ /g, more preferably It may be 0.05 cm ³ /g to 0.3 cm ³ /g.

That is, since the nanoporous lithium-metal oxide particles have a high BET specific surface area and porosity, when they are used as an electrode active material of an electrochemical device such as a secondary battery or a supercapacitor, the occlusion and desorption of the electrolyte is easy, so that the electrochemical device may have improved electrochemical properties.

In one embodiment of the present application, the particles may be formed by applying microwaves. By being formed by applying microwaves, the nanoporous lithium-metal oxide particles may have a homogeneous pore size and particle size distribution, and exhibit excellent electrochemical output characteristics and stability.

The second aspect of the present application is

preparing a precursor mixture by mixing a lithium precursor and a metal precursor in a solvent; preparing a lithium-metal oxide by applying microwaves to the precursor mixture; and filtering the prepared lithium-metal oxide to obtain a lithium-metal oxide in powder form; it provides a method for producing nanoporous lithium-metal oxide particles comprising a.

Although detailed descriptions of parts overlapping with the first aspect of the present application are omitted, the contents described with respect to the first aspect of the present application may be equally applied even if the description thereof is omitted in the second aspect.

Hereinafter, the method for preparing the nanoporous lithium-metal oxide particles according to the second aspect of the present application will be described in detail step by step.

First, in one embodiment of the present application, the method for preparing the nanoporous lithium-metal oxide particles comprises the steps of preparing a precursor mixture by mixing a lithium precursor and a metal precursor in a solvent.

In one embodiment of the present application, the lithium precursor may be a material containing a monovalent lithium cation, and is composed of acetate groups, hydroxyl groups, alkoxide groups, carbonates, halides, amidinates, diketonates, and combinations thereof. It may include an anion selected from the group. Preferably, in one embodiment of the present application, the lithium precursor may be lithium acetate (CH ₃ COOLi) or lithium hydroxide (LiOH).

In one embodiment of the present application, the content of the lithium precursor may be 40 to 50 molar ratio relative to 100 molar ratio of the precursor mixture, preferably 45 to 48 molar ratio, and more preferably 47 to 48 molar ratio. . When the content of the lithium precursor is less than 40 molar ratio with respect to 100 molar amount of the precursor mixture, the content of the lithium precursor is relatively too small, so that a metal oxide that does not contain lithium may be generated in the nanoporous lithium-metal oxide particles prepared later, 50 When the molar ratio is exceeded, the surface area of the nanoporous lithium-metal oxide particles produced thereafter may be reduced because the content of the lithium precursor is relatively too high.

In one embodiment of the present application, the metal precursor may be a titanium precursor or a vanadium precursor, but is not limited thereto. For example, the metal precursor may be a material containing a tetravalent titanium cation, and may contain an anion selected from the group consisting of an alkoxide group, carbonate, halide, amidinate, diketonate, and combinations thereof. can Preferably, in one embodiment of the present application, the titanium precursor may be titanium (IV) isopropoxide (Titanium (IV) isopropoxide) or titanium (IV) n-butoxide (Titanium (IV) n-butoxide). have.

In one embodiment of the present application, the mixing may be mixing the lithium precursor and the metal precursor in a molar ratio of 4:5 to 4.5:5, preferably mixing in a molar ratio of 4.4:5 to 4.5:5 it could be When the molar ratio is out of the above, a metal oxide containing no lithium may be generated, or a lithium-metal oxide having structurally low electrical conductivity may be generated.

In one embodiment of the present application, the mixing of the lithium precursor and the metal precursor may be carried out under a solvent, in which case the type of the solvent is not greatly limited, but for example, a glycol or alcohol solvent may be used, Preferably, ethylene glycol, 1,4-butanediol (1,4-Butanediol) or ethanol (ethanol) may be used.

Next, in one embodiment of the present application, the method for preparing the nanoporous lithium-metal oxide particles includes the steps of preparing a lithium-metal oxide by applying microwaves to the precursor mixture.

In one embodiment of the present application, the microwave may be applied at a temperature of 100 °C to 350 °C, preferably 150 °C to 330 °C, more preferably 180 °C to 300 °C. In addition, the microwave may be applied for 0.5 to 5 hours, preferably for 1 to 3 hours. When the microwave application step is performed at a temperature of less than 100° C. or for less than 0.5 hours, the lithium-metal oxide may not be smoothly prepared, and when the lithium-metal oxide is performed at a temperature of more than 350° C. or for more than 5 hours, the lithium - Since the temperature and time ranges for preparing the metal oxide have already been satisfied, it may be uneconomical.

The third aspect of the present application is

It provides an electrode for an electronic device comprising the nanoporous lithium-metal oxide particles according to the first aspect of the present application.

Although detailed descriptions of parts overlapping with the first and second aspects of the present application are omitted, the descriptions of the first and second aspects of the present application may be equally applied even if the description is omitted in the third aspect. .

Hereinafter, an electrode for an electronic device including the nanoporous lithium-metal oxide particles according to the third aspect of the present application will be described in detail.

In one embodiment of the present application, the electrode may be used in a secondary battery or a supercapacitor, and as an electrode active material, the nanoporous lithium-metal oxide has high porosity and homogeneous particle and pore size. It may be to improve energy density and output characteristics. Specifically, the BET specific surface area of the nanoporous lithium-metal oxide may be 50 m ² /g to 500 m ² /g, and the total pore volume may be 0.05 cm ³ /g to 0.3 cm ³ /g. .

In one embodiment of the present application, the electrode active material may be formed on the electrode current collector. In this case, if the electrode current collector has conductivity without causing a chemical change in the device, there may be no restriction on the type of the current collector. For example, the electrode current collector may include stainless steel, aluminum, nickel, titanium, sintered carbon, or a material in which carbon, nickel, titanium, silver, or the like is surface-treated on the surface of aluminum or stainless steel. Meanwhile, the electrode current collector may have a thickness of about 3 μm to 500 μm, and may be to form fine irregularities on the surface of the current collector to increase the adhesion of the electrode active material. That is, it may be used in various forms, such as a film, a sheet, a foil, a net, a porous body, a foam, a nonwoven body, and the like.

In one embodiment of the present application, the electrode active material may further include a conductive material and a binder in addition to the active material. In this case, the conductive material is used to impart conductivity to the electrode, and as long as it has electrical conductivity without causing a chemical change in the device, there may be no restriction on the type of the conductive material. For example, the conductive material may include graphite such as natural graphite or artificial graphite, carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, summer black, carbon-based materials such as carbon fiber, copper, nickel aluminum , a metal powder or metal fiber such as silver, a conductive whiskey such as zinc oxide and potassium titanate, a conductive metal oxide such as titanium oxide or a conductive polymer such as a polyphenylene derivative, and a material selected from the group consisting of combinations thereof may be doing Meanwhile, the conductive material may be typically used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the electrode active material.

In addition, the binder may serve to improve adhesion between the electrode active material particles and adhesion between the electrode active material and the current collector. Specifically, the binder is, for example, polyvinylidene fluoride (PVDF), vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinyl alcohol, polyacrylonitrile (polyacrylonitrile), Carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene polymer (EPDM), alcohol It may include a material selected from the group consisting of ponylated-EPDM, styrene butadiene rubber (SBR), fluororubber, or various copolymers thereof and combinations thereof. Meanwhile, the binder may be typically used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the electrode active material.

In addition, the supercapacitor may preferably be a hybrid supercapacitor, and the hybrid supercapacitor may specifically include a positive electrode; cathode; It may include a separator and an electrolyte interposed between the positive electrode and the negative electrode. In this case, the electrode active material may preferably be one used as the active material of the negative electrode, and activated carbon may be used as the positive electrode active material of the positive electrode.

In one embodiment of the present application, the electrolyte used in the hybrid supercapacitor may be used by mixing a salt and an additive in an organic solvent. At this time, the organic solvent is ACN (Acetonitrile), EC (Ethylene carbonate), PC (Propylene carbonate), DMC (Dimethyl carbonate), DEC (Diethyl carbonate), EMC (Ethylmethyl carbonate), DME (1,2-dimethoxyethane), It may include a material selected from the group consisting of GBL (γ-buthrolactone), MF (Methyl formate), MP (Methyl propionate), and combinations thereof. In addition, 0.8 to 2 M of the salt is used, and a lithium (Li) salt and a non-lithium salt may be mixed and used. The lithium (Li) salt is accompanied by an insertion/desorption reaction into the structure of the anode active material, that is, the metal-organic framework, and its types include LiBF ₄ , LiPF ₆ , LiClO ₄ , LiAsF ₆ , LiAlCl ₄ , LiCF ₃ SO ₃ , LiN(SO ₂ CF ₃ ) ₂ , LiC(SO ₂ CF ₃ ) ₃ , LiBOB (Lithium bis(oxalato)borate), and combinations thereof may be included. In addition, the non-lithium salt is accompanied by an adsorption/desorption reaction on the surface area of the carbon material additive, and may be used by mixing 0 to 0.5 M with the lithium salt. In this case, the non-lithium salt contains a material selected from the group consisting of TEABF ₄ (Tetraethylammonium tetrafluoroborate), TEMABF ₄ (Triethylmethylammonium tetrafluorborate), SBPBF ₄ (spiro-(1,1′)-bipyrrolidium tetrafluoroborate) and combinations thereof. may be doing In addition, the carbon material additive may include a material selected from the group consisting of VC (Vinylene Carbonate), VEC (Vinyl ethylene carbonate), FEC (Fluoroethylene carbonate), and combinations thereof.

In one embodiment of the present application, the separator is positioned between the positive electrode and the negative electrode to prevent the positive electrode and the negative electrode from being in physical contact with each other to prevent an electrical short, and a material having a porosity may be used. For example, the separator may include a material selected from the group consisting of polypropylene-based, polyethylene-based, polyolefin-based, and combinations thereof.

In one embodiment of the present application, since the hybrid supercapacitor having the above configuration uses nanoporous lithium-metal oxide particles as an electrode active material, the capacity is improved due to the high specific surface area, so that it has high energy density and output characteristics. have. That is, since the nanoporous lithium-metal oxide particles have a homogeneous pore size and particle size, a hybrid supercapacitor including the same may exhibit excellent capacitance and output characteristics.

The fourth aspect of the present application is

It provides an adsorbent comprising nanoporous lithium-metal oxide particles according to the first aspect of the present application.

In addition, the fifth aspect of the present application,

It provides a catalyst comprising nanoporous lithium-metal oxide particles according to the first aspect of the present application.

Although detailed descriptions of parts overlapping with the first to third aspects of the present application are omitted, the descriptions of the first to third aspects of the present application are the same even if the descriptions are omitted in the fourth and fifth aspects can be applied

In one embodiment of the present application, the nanoporous lithium-metal oxide particles are a catalyst for water purification, an anticancer agent, an immunodeficiency virus treatment agent, a treatment agent for fungal and bacterial infections, a treatment agent for malaria, and various drug delivery materials in addition to the electrode active material of a supercapacitor or a secondary battery. , photocatalysts, sensors, aerospace materials, etc. can be applied in various fields, so it can be used as a commercially very useful material.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

Example 1. Synthesis of nanoporous lithium-metal oxide particles

1 illustrates a manufacturing process of nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention.

In order to prepare the nanoporous lithium-metal oxide particles according to the present invention, first, a lithium precursor (hydroxide, acetate, etc.) is dissolved in a glycol-based solution (ethylene glycol, 1,4-Butanediol, etc.), and then a titanium precursor (n- butoxide, isopropoxide, etc.) is mixed with Li in a molar ratio of 4.5:5. Thereafter, 50 ml of the mixed solution is put into a microwave reactor and heated at 240° C. for 2 hours. Then, after exchanging the solution with ethanol, the powder was separated and dried in a centrifuge at 4000 rpm for 3 minutes to synthesize nanoporous lithium-metal oxide particles. The SEM photograph of the nanoporous lithium-metal oxide particles is shown in FIG. 2 , and it was confirmed that the nano-sized, homogeneous porous lithium-metal oxide particles were formed.

Experimental Example 1. PXRD analysis of nanoporous lithium-metal oxide particles

XRD analysis of the nanoporous lithium-metal oxide (LTO) particles and commercial LTO prepared in the above example was performed, and the results are shown in FIG. 3 . As shown in FIG. 3 , in the case of the nano-porous lithium-metal oxide particles prepared in Examples of the present invention, it was confirmed that the peak intensity was smaller than that of commercial LTO. This indicates that the crystal grains of lithium-metal oxide synthesized at low temperature are smaller than commercial LTO heated at high temperature, and the position of the diffraction peak is deviated from the ideal position, indicating relatively low crystallinity.

Experimental Example 2. Nitrogen adsorption isotherm analysis of nanoporous lithium-metal oxide particles

4 is a graph showing the nitrogen adsorption isotherm of the nanoporous lithium-metal oxide particles prepared according to an embodiment of the present invention. As shown in FIG. 4 , it was confirmed that nitrogen adsorption was significantly better in the case of the nano-porous lithium-metal oxide particles prepared in Examples of the present invention compared to commercial LTO. This indicates that the surface area of the nanoporous lithium-metal oxide prepared according to the example is significantly higher than that of commercial LTO.

Experimental Example 3. Measurement of surface area and pore properties of nanoporous lithium-metal oxide particles

The specific surface area and pore distribution of the nanoporous lithium-metal oxide particles prepared in Examples were measured and shown in Table 1 and FIG. 5 below.

[Table 1]

As shown in Table 1, the nanoporous lithium-metal oxide particles according to the embodiment of the present invention have a significantly larger BET specific surface area value compared to commercial LTO, and have high porosity because both the total pore volume and the micropore volume are large. was able to confirm

Experimental Example 4. Ion Adsorption Characteristics of Nanoporous Lithium-Metal Oxide Particles

The nanoporous lithium-metal oxide particles prepared in the above example were added to a solution in which Zn, Co, Cu, and Ni nitrate were mixed in DMF, respectively. The results are shown in FIG. 6 .

Before the nanoporous lithium-metal oxide particles were added, the metal nitrate solution was transparent to the naked eye, but after the nanoporous lithium-metal oxide particles were added, the turbidity increased and was no longer transparent.

Then, after drying each of the above-mentioned mixtures, photographs and PXRD results are shown in FIG. 6 .

As shown in FIG. 6 , it was confirmed that the nanoporous lithium-metal oxide particles of the present invention had very excellent ion adsorption properties. This is presumed to be due to the large surface area and low crystallinity of the lithium-metal oxide particles of the present invention.

Claims (20)

A nanoporous lithium-metal oxide particle comprising:
The particles have a pore size of W ₅₀ ± 1.0 nm in the range of 30% to 70% of the distribution rate of the pore size distribution curve,
The lithium-metal oxide particles have an average pore size of more than 0 and 6 nm or less,
Nanoporous lithium-metal oxide particles, characterized in that the BET specific surface area of the nanoporous lithium-metal oxide particles is 50 m ² /g to 350 m ² /g.
(The W ₅₀ means the pore size when the distribution ratio is 50% in the distribution curve of the pore size of the nanoporous lithium-metal oxide particles)
According to claim 1,
The lithium-metal oxide is lithium titanate (LTO), lithium vanadium oxide (LVO), lithium-vanadium phosphate (LVP), lithium cobalt oxide, lithium nickel oxide, lithium manganese Nanoporous lithium-metal oxide particles which are one selected from the group consisting of oxides, lithium nickel-cobalt-manganese composite oxides, and mixtures thereof.
◈Claim 3 was abandoned when paying the registration fee.◈ According to claim 1,
The particle is a nanoporous lithium-metal oxide particle, characterized in that it has a particle size of (0.5 to 10) x D ₅₀ in the range of 20% to 70% of the distribution ratio of the particle size distribution curve.
(The D ₅₀ means the particle size when the distribution ratio is 50% in the distribution curve of the particle size of the nanoporous lithium-metal oxide particles)
◈Claim 4 was abandoned when paying the registration fee.◈ The nanoporous lithium-metal oxide particle of claim 3, wherein the particle has a D ₅₀ of 1.5 to 5.0 μm.
The nanoporous lithium-metal oxide particle of claim 1 , wherein the particle is spherical.
delete delete ◈Claim 8 was abandoned when paying the registration fee.◈ The nanoporous lithium-metal oxide particle according to claim 1, wherein the nanoporous lithium-metal oxide particle has a total pore volume of 0.05 cm ³ /g to 0.3 cm ³ /g.
◈Claim 9 was abandoned when paying the registration fee.◈ The nanoporous lithium-metal oxide particles according to claim 1, wherein the lithium-metal oxide particles have a micropore volume of 0.005 cm ³ /g to 0.05 cm ³ /g.
The nanoporous lithium-metal oxide particle of claim 1, wherein the particle is formed by applying a microwave.
A method for preparing the nanoporous lithium-metal oxide particles according to claim 1,
preparing a precursor mixture by mixing a lithium precursor and a metal precursor in a solvent;
preparing a lithium-metal oxide by applying microwaves to the precursor mixture; and
filtering the prepared lithium-metal oxide to obtain a lithium-metal oxide in powder form;
A method for producing nanoporous lithium-metal oxide particles comprising a.
The method of claim 11, wherein the lithium precursor contains a monovalent lithium cation.
The method of claim 11, wherein the metal precursor is a titanium precursor or a vanadium precursor.
◈Claim 14 was abandoned at the time of payment of the registration fee.◈ The method of claim 11, wherein the solvent is a glycol solvent.
◈Claim 15 was abandoned when paying the registration fee.◈ The method of claim 11, wherein the mixing comprises mixing the lithium precursor and the metal precursor in a molar ratio of 1:5-5:1.
◈Claim 16 was abandoned when paying the registration fee.◈ The method of claim 11, wherein the microwave is applied at a temperature of 100°C to 350°C.
◈Claim 17 was abandoned when paying the registration fee.◈ The method of claim 11, wherein the microwave is applied for 0.5 to 5 hours.
An electrode for an electronic device comprising the nanoporous lithium-metal oxide particles of claim 1 .
An adsorbent comprising the nanoporous lithium-metal oxide particles of claim 1 .
A catalyst comprising the nanoporous lithium-metal oxide particles of claim 1 .

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