WO2013100608A1 - 이산화티타늄 나노분말, 타이타네이트, 리튬 타이타네이트 나노 분말 및 이들의 제조 방법 - Google Patents
이산화티타늄 나노분말, 타이타네이트, 리튬 타이타네이트 나노 분말 및 이들의 제조 방법 Download PDFInfo
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- C01G23/047—Titanium dioxide
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- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
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- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0536—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing chloride-containing salts
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- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
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- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C01P2004/13—Nanotubes
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- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- Titanium Dioxide Nano Powder Titanate, Lithium Titanate Nano Powders
- the present invention relates to a titanium dioxide nanopowder, titanate, lithium titanate nanopowder and a method for producing the same.
- Crystalline titanium dioxide nanopowder with average particle size of 50 nm or less is a representative photocatalyst material and attracts attention as a new energy environmental material with the characteristics of decomposition, antibacterial and deodorization of harmful components by using ultraviolet light as an energy source.
- the development of materials and applications has been rapid.
- a general method for producing titanium dioxide can be divided as follows.
- the sulfuric acid method is a method of obtaining Ti0 2 of a desired size after sintering and growing titanium dioxide obtained by thermal hydrolysis of an aqueous solution of TiOS0 4 at 800 to 1000 ° C.
- it may cause environmental problems due to the generation of waste sulfuric acid during the process, and it is possible to manufacture titanium dioxide of fine grains through physical crushing, but because powders of lower purity are produced due to impurities, raw materials for energy storage It cannot be used for materials or precision materials such as MLCC.
- Ti0 2 particles are formed.
- hydrochloric acid method it is possible to manufacture only rutile crystal phase because of using precipitated powder produced by high temperature reaction, and requires expensive equipment and chlorine control technology for capturing hydrochloric acid gas. This is high.
- the method for preparing titanium dioxide nanopowders having a quasi-crystalline phase can freely convert physical and / or electrochemical properties by controlling the particle size of the powder.
- a titanium dioxide nano powder having a semi-crystalline phase which is an intermediate form between the crystalline phase and the amorphous phase.
- the XRD main peak of the quasi-crystalline phase may be shifted and broadened relative to the crystalline phase.
- the XRD main peak of the quasi-crystalline phase is shifted relative to the main peak of the anatase type crystal phase, and a 2 ⁇ value may be 23 ° ⁇ 2 ⁇ 26 ° .
- the XRD main peak of the quasi-crystalline phase is shifted relative to the main peak of the rutile crystal phase.
- the value of 2 ⁇ may be 26 ° ⁇ 2 ⁇ 29 ° .
- the average particle size of the powder may be 150 nm or less.
- step (a) includes: The amount of water is controlled so that the Ti 3+ ion concentration is 0.1 to 1.3M, and the step (b) controls the amount of water so that the Ti 3+ ion concentration is 1.5 to 4.3M.
- the amount of water is controlled so that the Ti 3+ ion concentration is 0.1 to 1.3M, and the step (b) controls the amount of water so that the Ti 3+ ion concentration is 1.5 to 4.3M.
- the hydrothermal reaction of step (b) may be a reaction of heating to a temperature of 50 to 200 ° C.
- a titanate having a one-dimensional structure prepared by the reaction of an alkali solution with a titanium dioxide nano powder having a semi-normal phase, which is an intermediate form of a crystalline phase and an amorphous phase, titanate).
- the unidirectional titanate may be in the form of a nanoleube, a nanosheet, a nanowire or a nanorod.
- the titanium dioxide nano powder prepared by the above-described method is reacted with 5 to 25 M aqueous alkali solution to obtain one-dimensional titanate. It provides a method for producing a titanate.
- the alkaline aqueous solution may include at least one of LiOH, 0H, and NaOH. ⁇ 24>
- the titanium dioxide nano powder and the alkaline aqueous solution reaction conditions are 80 to
- the reaction may be performed at 350 ° C. for 6 to 20 hours.
- lithium titanate nanopowder prepared by the reaction of the aforementioned unidirectional titanate and lithium hydroxide (LiOH).
- lithium titanate nano to react the titanate prepared by the above-described method with lithium hydroxide (LiOH) 10 to 30m and then heat it to 400 to 120CTC It provides a method for producing a powder.
- Example 1 is a transmission electron micrograph of the titanium dioxide nano powder according to Example 1.
- FIG. 2 shows the XRD peak of the titanium dioxide nano powder according to Example 1.
- FIG. 3 is a scanning electron micrograph of the unidirectional titanate according to Example 2.
- FIG. 4 is a scanning electron micrograph of titanate prepared using various crystalline titanium dioxide particles.
- FIG. 5 is a scanning electron micrograph of the titanate prepared while changing the reaction conditions in Example 2.
- FIG. 6 is data for evaluating characteristics of the coin-type half battery according to Example 4.
- a titanium dioxide nanopowder having a semicrystalline phase which is an intermediate form between a crystalline phase and an amorphous phase is provided.
- one-way titanate can be prepared. Detailed description thereof will be described later.
- the XRD main peak of the quasi-crystalline phase may be shifted and broadened relative to the crystal phase.
- the semi-crystalline phase full width at half maximum may have a value of 1.9 to 2.5.
- the XRD main peak of the quasi-crystalline phase is shifted relative to the main peak of the anatase type crystal phase, and a 2 ⁇ value may be 23 ° ⁇ 2 ⁇ ⁇ 26 °.
- the XRD main peak of the quasi-crystalline phase is shifted relative to the main peak of the rutile crystal phase, so that the 2 ⁇ value may be 26 ° ⁇ 2 ⁇ 29 ° .
- the characteristic of such peaks is due to the decrease in crystallinity due to an increase in the amount of the amorphous phase compared to the reference crystal structure (anatase or rutile).
- the average particle size of the powder may be 150 nm or less. More specifically 10nm
- titanium dioxide nano powder According to the manufacturing method of the titanium dioxide nano powder according to another embodiment of the present invention can be adjusted the particle size as described above.
- the particle size of titanium dioxide can be adjusted according to the desired electrical and / or chemical properties.
- step (a) includes The amount of water is controlled so that the Ti 3+ ion concentration is 0.1 to 1.3M, and the step (b) controls the amount of water so that the Ti 3+ ion concentration is 1.5 to 4.3M.
- the hydrothermal reaction of step (b) may be heated to a temperature of 50 to 20CTC.
- step (a) when the amount of water is controlled such that the concentration of Ti 3+ is 0.1 to 1.3M, TiOCl 2 in a jelly form may be prepared.
- the concentration is less than 0.1 M, the concentration of Ti 3+ ions is insufficient, so that a water-soluble solid cannot be formed.
- the concentration is higher than 1.3 M, TiOCl 2 solids are formed and water-soluble cannot be formed.
- TiOCl 2 of the prepared jelly type is stable even in phase silver, and in the prepared jelly
- Titanium dioxide nanopowders having a semicrystalline phase which is an intermediate form between the crystalline phase and the amorphous phase, may be obtained through a hydrothermal reaction in which the TiOCl 2 in the jelly form is mixed with water.
- the hydrothermal reaction of mixing TiOCl 2 and water in the jelly form may include removing stable chloride silver and hydrochloric acid.
- the concentration of Ti 3+ ions may be 1.5 to 4.3 M.
- the temperature of the aqueous solution is changed to 50 to 200 ° C in the process, it can be carried out sedimentation.
- a rutile phase may be formed at 50 to 90 ° C.
- an anatase phase may be formed at 90 to 150 ° C.
- 150 to 2 CKTC it is possible to prepare an anatase and a rutile composite phase.
- the phase change with temperature is a result of activation energy of Ti 3+ ions.
- the prepared titanium dioxide (0 2 ) precipitate, HC1 solution, and chloride suspension can leave the titanium dioxide precipitate through filtering, and then the aqueous solution can be removed.
- Distilled water may be used to wash the Ti3 ⁇ 4 precipitate. After the Ti0 2 precipitate is filtered through the following filter paper, the final titanium dioxide nanopowder may be manufactured by drying at a temperature of 60 ° C. or less.
- it is prepared by the reaction of titanium dioxide nanopowder having a semi-normal top, which is an intermediate form of the crystalline phase and the amorphous phase, and an alkaline solution, thereby unidirectional (0 ⁇ — (1 ⁇ ⁇ ⁇ 0 ⁇ Titanate with 1) can be provided.
- the unidirectional titanate may be in the form of nanotubes, nanosheets, nanowires or nanorods. However, it is not limited thereto.
- Such unidirectional titanate may improve electrical properties when used as an energy material (eg, a negative electrode material of a secondary battery).
- the unidirectional titanate may be obtained by reacting the titanium dioxide nano powder prepared by the method according to the embodiment of the present invention with 5 to 25 M aqueous alkali solution.
- concentration range is less than 5M, Ti-0-Ti bonds cannot be broken, and if the concentration range is greater than 25M, the Ti-0-Ti bond itself is completely broken to become an amorphous state.
- the alkaline aqueous solution may include at least one of LiOH, KOH, NaOH.
- reaction conditions of the titanium dioxide nano powder and the aqueous alkali solution may be 6 to 20 hours at a temperature of 80 to 35 CTC.
- the reaction temperature is less than 80 ° C., the layered layer formed by Ti— 0-Ti debonding
- Ti-0-Ti cannot produce nanounidirectional powders due to the decrease in activation energy to add surface energy, and if it exceeds 35 CTC, the unidirectional is released due to excessive activation energy and is converted into spherical nanopowder. do.
- the titanium dioxide nano powder and the aqueous alkali solution are 8: 2 to weight ratios
- This range can be effective for preparing unidirectional titanates.
- Another embodiment of the present invention provides a lithium titanate nanopowder prepared by the reaction of a unidirectional titanate with lithium hydroxide (LiOH) according to an embodiment of the present invention.
- LiOH lithium hydroxide
- the lithium titanate nano powder is reacted with 10-30 m of titanate and lithium hydroxide (LiOH) according to one embodiment of the present invention and then heated to 400-1200 ° C. Can be prepared.
- LiOH lithium hydroxide
- the lithium titanate may be used as a negative electrode active material of a lithium secondary battery.
- the reactants form TiOCl 2 soluble solids by rapid nuclear reaction. After maintaining the reaction, the concentration of Ti 3+ ions to 3.2M, after the addition of water to prepare a TiOCl 2 aqueous solution by stirring.
- the 3.2M is the most ideal molar concentration, and 1 ⁇ 0 (: 1 2 aqueous solution can be prepared even at the concentration of 1.5M to 4.3M mentioned above.
- the stirrer temperature is changed to 50 or 100, and precipitation reaction is performed. After the precipitation reaction for 1 hour, precipitated precipitate and the aqueous solution is filtered through a 0.0 m filter paper ⁇ 0 2 precipitate, to remove chloride ions through distilled water, to remove the remaining HC1.
- Example 3 Preparation of Relop Titanate
- the lithium titanate prepared in Example 3 was used as a negative electrode active material, ketjen black as a conductive agent, and polyvinyl idene fluoride (PVdF) fmf 90: 2: 8 as a binder. And mixed with a solvent, N-methyl-2-pyrroli done (NMP), to prepare a negative electrode slurry.
- NMP N-methyl-2-pyrroli done
- Ethylene carbonate (EC) and diethyl carbonate (DEC) were mixed in a volume ratio of 1: 2, and LiPF 6 was added to the nonaqueous electrolyte solvent to prepare a 1 M LiPFs nonaqueous electrolyte.
- a lithium metal foil was used as a positive electrode, a polyolefin separation film was interposed between both electrodes, and the electrolyte was injected to prepare a coin-type half cell.
- FIG. 1 is a transmission electron micrograph of the titanium dioxide nano powder according to Example 1. As shown in Figure 1 it can be seen that the particle size of titanium dioxide has a particle size of about 10nm to 50nm.
- FIG. 2 shows the XRD peak of the titanium dioxide nanopowder according to Example 1.
- Example 2 is the peak of the titanium dioxide nanopowder according to Example 1
- P-25 is the peak of P-25 (Degussa) which is a commercial powder
- HPPLT powder is the conventional low-temperature bacterium one-precipitation method.
- the peak of Ishihara powder prepared by using, and the heat-treated HPPLT powder is the peak of the powder heat-treated the Ishihara powder prepared by the conventional low temperature homogeneous precipitation method.
- the XRD peak is shifted by metastable phase formation, compared to the rutile crystal phase prepared by the low temperature homogeneous precipitation method used as the reference powder, and the anatase phase is also represented as the reference phase. It can be seen that the XRD peak is shifted compared to 25 (Degussa). This shift of the XRD peak is due to the increase in the amount of amorphous phase than the reference crystal structure due to metastable phase formation, and the crystallinity disappeared.
- FIG. 3 is a scanning electron micrograph of the unidirectional titanate according to Example 2.
- FIG. 3 is a unidirectional titanate according to Example 2, and the bottom photo of FIG. 3 is a titanate prepared using P-25.
- ⁇ i2i> As shown in FIG. 3, since the powder according to Example 1 has a semi-safety crystal structure, it can be easily dissolved in an alkaline solution to easily form a unidirectional powder. In the case of using a commercially available powder, it can be confirmed that due to the deterioration of solubility due to crystallinity, a small amount of unidirectional form and spherical titanium dioxide exist in combination rather than unidirectional form.
- FIG. 4 is a scanning electron micrograph of titanate prepared using various crystalline titanium dioxide particles.
- FIG 4 (a) is a titanate (Aldrich) using rutile titanium dioxide particles, (b) is a titanate according to Example 2 of the present invention, (c) is P-25 (Degus) Titanate using titanium dioxide particles, (d) is titanate (Aldrich City) using anatase type titanium dioxide particles.
- Example 5 is a premicroscopic scanning micrograph of a titanate prepared by changing the reaction conditions in Example 2 2 As shown in FIG. 5, nanowires according to the change of hydrothermal synthesis temperature and / or time It was confirmed that the unidirectional shapes such as, nano-lives, and nanosheets can be freely changed.
- TNT is the nano-tubular titanate of Example 2
- p-TNW is a commercialized pitch coated nanowire-type titanate
- p-Ti3 ⁇ 4 is a commercially available pitch.
- Coated Ti0 2 particles, and C-LTO is a commercialized LTO particle.
- the lithium titanate prepared according to the embodiment of the present invention has excellent crystallinity, has a large amount of space in which lithium can be inserted, and despite repeated insertion and desorption of lithium, A stable crystalline phase can enable insertion and removal of lithium.
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US14/369,555 US9260316B2 (en) | 2011-12-29 | 2012-12-27 | Titanium dioxide nanoparticle, titanate, lithium titanate nanoparticle, and preparation methods thereof |
AU2012360322A AU2012360322B2 (en) | 2011-12-29 | 2012-12-27 | Titanium dioxide nanopowder, titanate, lithium titanate nanopowder, and preparation methods thereof |
JP2014545837A JP5877249B2 (ja) | 2011-12-29 | 2012-12-27 | 二酸化チタンナノ粉末、チタネート、リチウムチタネートナノ粉末及びこれらの製造方法 |
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KR10-2011-0145368 | 2011-12-29 | ||
KR1020110145368A KR101431693B1 (ko) | 2011-12-29 | 2011-12-29 | 이산화티타늄 나노분말, 타이타네이트, 리튬 타이타네이트 나노 분말 및 이들의 제조 방법 |
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Cited By (2)
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JP2016531839A (ja) * | 2013-09-16 | 2016-10-13 | ナンヤン テクノロジカル ユニヴァーシティー | 長尺状チタネートナノチューブ、その合成方法、及びその使用 |
CN111533163A (zh) * | 2020-05-20 | 2020-08-14 | 中国科学技术大学 | 一种锂离子电池负极用黑色钛酸锂材料及其制备方法以及应用 |
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US20200095168A1 (en) * | 2018-09-21 | 2020-03-26 | Saint-Gobain Ceramics & Plastics, Inc. | High pore volume titanium dioxide ceramic materials and methods of making thereof |
CN109821525A (zh) * | 2019-03-28 | 2019-05-31 | 东北林业大学 | 一种负载生物质碳点缺陷二氧化钛光催化剂的制备方法 |
KR102199812B1 (ko) * | 2019-05-15 | 2021-01-07 | (주)다인스 | 습식 나노 분말 제조방법 |
CN112707726B (zh) * | 2020-02-24 | 2022-12-20 | 中国科学院深圳先进技术研究院 | 一种钛酸钡纳米粉体制备方法 |
KR102438000B1 (ko) * | 2020-10-27 | 2022-08-29 | 한국세라믹기술원 | 자외선 차단제용 이산화티타늄 나노입자의 제조 방법 |
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KR100277164B1 (ko) * | 1998-07-16 | 2001-01-15 | 장인순 | 저온균질침전법을이용한사염화티타늄수용액으로부터의결정성tio₂초미립분말의제조방법 |
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CN111533163B (zh) * | 2020-05-20 | 2022-04-19 | 中国科学技术大学 | 一种锂离子电池负极用黑色钛酸锂材料及其制备方法以及应用 |
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AU2012360322A1 (en) | 2014-07-24 |
KR20130076935A (ko) | 2013-07-09 |
US9260316B2 (en) | 2016-02-16 |
US20140363368A1 (en) | 2014-12-11 |
AU2012360322B2 (en) | 2015-11-05 |
KR101431693B1 (ko) | 2014-08-22 |
JP2015505807A (ja) | 2015-02-26 |
JP5877249B2 (ja) | 2016-03-02 |
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