WO2006123710A1 - リチウム二次電池正極用のリチウム含有複合酸化物の製造方法 - Google Patents
リチウム二次電池正極用のリチウム含有複合酸化物の製造方法 Download PDFInfo
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- 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
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- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
- C01G53/44—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
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- C01G45/1221—Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof
- C01G45/1228—Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof of the type (MnO2)-, e.g. LiMnO2 or Li(MxMn1-x)O2
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- C01G51/42—Complex oxides containing cobalt and at least one other metal element containing alkali metals, e.g. LiCoO2
- C01G51/44—Complex oxides containing cobalt and at least one other metal element containing alkali metals, e.g. LiCoO2 containing manganese
- C01G51/50—Complex oxides containing cobalt and at least one other metal element containing alkali metals, e.g. LiCoO2 containing manganese of the type (MnO2)n-, e.g. Li(CoxMn1-x)O2 or Li(MyCoxMn1-x-y)O2
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- 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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- 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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- 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
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- 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
Definitions
- the present invention provides a lithium-containing composite oxide for a lithium secondary battery positive electrode having a large volumetric capacity density, high safety, excellent charge / discharge cycle durability, high press density, and high productivity.
- the present invention relates to a method, a positive electrode for a lithium secondary battery including the manufactured lithium-containing composite oxide, and a lithium secondary battery.
- non-aqueous electrolyte secondary batteries such as lithium secondary batteries that are small, lightweight, and have high energy density.
- the positive electrode active material for non-aqueous electrolyte secondary batteries is LiCoO,
- lithium cobalt composite oxide (LiCoO) is used as a positive electrode active material.
- Lithium secondary batteries using carbon, such as copper alloy, graphite, and carbon fiber, as the negative electrode are widely used as batteries with high energy density because high voltages of 4V can be obtained.
- Patent Document 1 In order to solve these problems, in Patent Document 1, the raw material components are mixed and fired in a solid phase, and a part of cobalt element is replaced with an element such as manganese or copper by a so-called solid phase method. There have been reports on stabilization of crystal lattice and improvement of properties of lithium cobalt complex oxides. However, in this solid phase method, although the cycle characteristics can be improved by the effect of the substitution element, the electric power is gradually increased by repeating the charge / discharge cycle. It was confirmed that the thickness of the pond increased.
- Patent Document 2 reports that the properties of lithium cobalt composite oxides are improved by substituting a part of cobalt element with an element such as magnesium by a coprecipitation method.
- element replacement in a more uniform state is possible, but there are restrictions on the type and concentration of elements that can be replaced, and lithium cobalt complex oxides that have the expected characteristics. There is a problem that it is difficult to obtain things.
- Patent Document 1 Japanese Patent Laid-Open No. 5-242891
- Patent Document 2 JP 2002-198051 A
- the present invention replaces an element such as cobalt in a lithium cobalt complex oxide or the like with various substitution elements, thereby increasing the volumetric capacity density and increasing the safety and the charge / discharge cycle durability. Furthermore, it aims at providing the manufacturing method of lithium containing complex oxides, such as lithium cobalt complex oxide for lithium secondary battery positive electrodes excellent in the low-temperature characteristic.
- substituted elements such as cobalt in lithium cobalt composite oxides and the like are substituted elements such as aluminum, magnesium and zirconium.
- the element to be substituted is uniformly substituted with the substitution element, thereby maintaining a high filling property and remarkably improved characteristics.
- lithium-containing composite oxides such as The element to be substituted specifically represents at least one element selected from the group force of Co, Mn, and N, and may hereinafter be referred to as N element.
- the substitution element specifically represents at least one element selected from a group metal force consisting of transition metal elements other than N, A1, and alkaline earth metal elements, and may be referred to as M element hereinafter.
- the N element as the element to be replaced is uniformly substituted at various concentrations by various M elements as the substitution element. Obtained In the lithium-containing composite oxide, the M element as a substitution element is present uniformly, and the expected effect can be obtained. Further, in the present invention, as in the conventional coprecipitation method described above, there is a restriction that the element type and concentration of the M element to be replaced are limited, and the N element can be replaced with various M elements at an appropriate concentration. . Therefore, the obtained lithium-containing composite oxide has excellent characteristics in any of volume capacity density, safety, charge / discharge cycle durability, press density, and productivity as a positive electrode of a lithium secondary battery. .
- the gist of the present invention is as follows.
- a mixture containing a lithium source, an N element source, an M element source, and, if necessary, a fluorine source is calcined in an oxygen-containing atmosphere, and the general formula Li NMOF (where N is from Co, Mn and Ni)
- the M element source-containing solution is a solution containing a compound having a total of two or more carboxylic acid groups or hydroxyl groups in the molecule.
- N element is Co, Ni, Co and Ni, Mn and Ni, or Co and Ni and Mn.
- the M element in the M element source-containing solution is at least one element selected from the group force consisting of Zr, Hf, Ti, Nb, Ta, Mg, Cu, Sn, Zn, and Al. Any one of (6) The manufacturing method as described in.
- a positive electrode for a lithium secondary battery comprising a lithium-containing composite oxide produced by the production method according to any one of (1) to (9) above.
- the element N to be substituted can be uniformly substituted at various appropriate concentrations by various elements M as the substitution element, so that the volume capacity density is large.
- the present invention provides a method for producing a lithium-containing composite acid such as a lithium cobalt composite acid for a positive electrode of a lithium secondary battery, which has excellent charge / discharge cycle durability and excellent low temperature characteristics.
- a lithium-containing composite oxide for a positive electrode of a lithium secondary battery according to the present invention has a general formula Li N
- a is larger than 0, a complex oxide in which a part of oxygen atoms is substituted with fluorine atoms is obtained, but in this case, the safety of the obtained positive electrode active material is improved.
- the sum of the number of cations atoms is equal to the sum of the number of atoms of cation, that is, the sum of p, x and y is equal to the sum of z and a.
- the N element is at least one element selected from the group consisting of Co, Mn, and Ni. Among them, Co, Ni, a combination of Co and Ni, a combination of Mn and Ni, or Co and Ni And is a combination of Mn and
- the M element is at least one element selected from the group power consisting of transition metal elements other than the N element, aluminum, and alkaline earth metals.
- transition metal elements are group 4 of the periodic table , Group 5, Group 6, Group 7, Group 8, Group 9, Group 10 or Group 11 transition metal.
- the M element is preferably at least one element selected from the group consisting of Zr, Hf, Ti, Nb, Ta, Mg, Cu, Sn, Zn, and Al.
- Zr, Hf, Ti, Mg, or Al is preferable from the viewpoint of capacity development, safety, cycle durability, and the like.
- N element source used in the present invention when N element is cobalt, cobalt carbonate, hydroxy-cobalt, oxyhydroxide-conolate, acid-cobalt and the like are preferably used. Is done. Hydroxoxy hydroxide, especially hydroxy hydroxide, is preferred because of its easy performance. When the N element is nickel, nickel hydroxide and nickel carbonate are preferably used. Further, when the N element is manganese, manganese carbonate is preferably used.
- the N element includes two or more elements, it is preferable that each element is uniformly dispersed at the atomic level by coprecipitation.
- the N element source to be co-precipitated co-precipitated hydroxide, co-precipitated hydroxide, co-precipitated oxide, co-precipitated carbonate and the like are preferable.
- the N element is a combination of nickel and cobalt, the atomic ratio of nickel and cobalt is preferably 90:10 to 70:30.
- the cobalt may be partially substituted with aluminum or manganese.
- the atomic ratio of nickel, cobalt, and manganese is preferably (10-50): (7-40): (20-70), respectively. If the N element source is a compound containing nickel and cobalt, Ni Co OOH, Ni C
- Ni is a compound containing nickel and manganese
- Mn OOH, etc. are compounds in which the N element source contains nickel, cobalt and manganese.
- Ni Co Mn OOH, Ni Co Mn OOH, etc. are preferred.
- lithium carbonate or lithium hydroxide is preferably used.
- lithium carbonate is preferable because it is inexpensive.
- fluorine source LiF, MgF, etc., which are preferably metal fluorides, are particularly preferable.
- an M element source-containing solution preferably an M element source-containing aqueous solution is used.
- M element sources include oxides, hydroxides, carbonates, nitrates and other inorganic salts; acetates, oxalates, citrates, lactates, tartrate, malates, malonic acid Organic salts such as salts; organometallic chelate complexes; or metal alcohols It may be a compound in which xoxide is stabilized with chelate or the like.
- the M element source can be dissolved in an aqueous solution uniformly, for example, water-soluble carbonate, nitrate, acetate, oxalate, citrate, lactate, tartrate, malic acid. Salt, malonate, or succinate is preferred. Of these, citrate and tartrate are more preferable because of their high solubility.
- the M element source-containing solution a solution containing a single compound or two or more compounds having a total of two or more carboxylic acid groups or hydroxyl groups in the molecule is preferably used for the stability of the solution.
- the presence of two or more carboxylic acid groups, and further a hydroxyl group in addition to the carboxylic acid group is more preferable because the solubility of the M element in an aqueous solution can be increased.
- a molecular structure having 3 to 4 carboxylic acid groups or coexisting with 4 to 4 hydroxyl groups is more preferable because the solubility can be increased.
- the number of carbon atoms of the compound having a total of two or more carboxylic acid groups or hydroxyl groups in the molecule is preferably 2 to 8. A particularly preferred carbon number is 2-6.
- Specific examples of compounds having a total of two or more carboxylic acid groups or hydroxyl groups in the molecule include citrate, tartaric acid, oxalic acid, malonic acid, malic acid, oxalic acid, lactic acid, ethylene glycol, and propylene glycol. Nole, diethylene glycol, triethylene glycol, dipropylene glycol, polyethylene glycol, butanediol and glycerin are preferred.
- citrate, tartaric acid and shinonoic acid are preferred because they can increase the solubility of the M element source and are relatively inexpensive.
- a highly acidic carboxylic acid such as oxalic acid
- the pH of the aqueous solution is less than 2, the N element source added later will be easily dissolved, so the pH can be adjusted by adding a base such as ammonia. It is preferably 2 or more and 12 or less. If the pH exceeds 12, it is preferable because the N element source is easily dissolved!
- the concentration of the compound having at least two carboxylic acid groups or hydroxyl groups in the M element source-containing solution is too high, the viscosity of the aqueous solution increases, and uniform mixing with other element source powders occurs. Is preferably 0.1 to 30% by weight, particularly 1 to 25% by weight or less.
- the N element source and the M element source those obtained by spraying the M element source-containing solution onto the powder containing the N element source are used.
- the M element source-containing solution is sprayed and dried simultaneously on the powder containing the N element source.
- the spraying is preferably carried out at 80 to 150 ° C., particularly preferably 90 to 120 ° C.
- the spray of the M element source-containing solution is preferably in the form of a mist of 0.1 to 250 / ⁇ ⁇ , particularly preferably 1 to 150 / ⁇ ⁇ , and contains the ⁇ element source with stirring. It is preferred to spray the powder.
- Various specific means can be adopted as a method for drying the spray containing the soot element source-containing solution onto the powder containing the soot element source. For example, while mixing powder containing soot element source with an axial mixer, drum mixer, turbulizer, etc., spraying an aqueous solution containing soot element source or mixing powder containing soot element source biaxially
- the above-described means is used, and the soot element source and the soot element source are produced in advance by drying treatment while spraying the soot element source-containing solution onto the powder containing the soot element source.
- the lithium-containing composite oxide is produced by mixing the soot element source and soot element source with other element sources, drying, and then firing.
- the above element-containing solution is sprayed onto the powder containing the element source and mixed with other element sources, followed by drying treatment. Then, it is preferable to fire the resulting mixture.
- Ii While mixing and stirring the element source and, if necessary, the fluorine source in an apparatus having a mixing and drying function, mixing and drying the element source-containing solution while spraying, and then mixing the lithium source.
- the lithium source, the soot element source, and, if necessary, the fluorine source are mixed and dried in a device having a mixing and drying function while the soot element source-containing solution is sprayed.
- each element source such as an element source
- the average particle size of the powder is particularly limited.
- 0.1 to 25 111 particles, particularly 0.5 to 20 / ⁇ ⁇ is preferable.
- the mixing ratio of each element source is the general formula of the positive electrode active material produced in the present invention. It is selected so as to have a desired element ratio within the range of Li NMOF.
- the mixed drying of the M element source-containing solution and the other element source powders in the means (A), (B) or (C) above is performed by spray-type injection such as a Ladige mixer or solid air. It is preferable to use a device with a liquid function and a mixing / drying function, which enables uniform mixing and drying in one stage. As a result, the lithium-containing composite oxide containing the N element and the M element having an appropriate particle size that has high productivity and does not cause excessive aggregation and pulverization, and in which the M element is uniformly distributed. can get. Further, as the drying apparatus, an apparatus having both a horizontal axis type stirring mechanism, a spray type liquid injection mechanism, and a heating mechanism, for example, a Laedige mixer, is particularly preferable for the uniformity of additive elements and particle control.
- the temperature at the time of mixing and drying the M element source-containing solution and the other element source powder in the means (A), (B) or (C) is preferably 80 to 150 ° C, particularly Preferably, it is 90 to 120 ° C. Since the solvent in the mixture of each element source is removed in the subsequent firing step, it is not always necessary to completely remove it at this stage, but when the solvent is water, it is necessary to remove moisture in the firing step. Since a large amount of energy is required, it is preferable to remove moisture as much as possible.
- the N element source, the M element source, and other element sources of the lithium-containing composite oxide are desired within the range of the Li N M O F, which is a general formula of the positive electrode active material to be manufactured.
- the resulting dried material in which the element source of the lithium-containing composite oxide is mixed is mixed with other raw materials as necessary, and then fired in an oxygen-containing atmosphere. This calcination is preferably performed under the conditions of 800-: L 100 ° C, 2-24 hours.
- the firing in the oxygen-containing atmosphere is preferably performed in a plurality of stages, and more preferably in two stages.
- the pre-stage firing is performed at 250 to 700 ° C
- the fired product is further post-stage fired at 850 to 1100 ° C.
- the firing temperature in the former stage is 400 to 600 ° C
- the firing temperature in the latter stage is 900 to 1050 ° C.
- the rate of temperature increase to each firing temperature in firing may be large or small, but is preferably 0.1 to 20 ° C / minute, particularly preferably 0.5 to 10 ° C / minute in terms of production efficiency. The temperature is raised in minutes.
- the average particle diameter D50 is preferably 5 to 15 ⁇ m, particularly preferably 8 to 12 m, and the specific surface area is preferably 0.2 to 0.6 m 2 Zg. Particularly preferred is 0.3 to 0.5 m 2 Zg.
- the integral width of the (110) plane diffraction peak of 20 66.5 ⁇ 1 ° measured by X-ray diffraction using CuK o; as a radiation source is preferably 0.08 to 0.14 °, particularly preferably ⁇ .
- the press density force is preferably 0.08 to 0.12 °, and preferably 3.05 to 3.50 g, particularly preferably 3.10 to 3.40 g Zcm 3 .
- the press density is an apparent density when a lithium-containing composite oxide powder is pressed at a pressure of 0.3 t / cm 2 .
- a positive electrode for a lithium secondary battery When producing a positive electrode for a lithium secondary battery from a strong lithium-containing composite oxide, carbon-based conductive materials such as acetylene black, graphite, and ketjen black are added to the lithium-containing composite oxide powder.
- the material and the binder are mixed.
- the binder preferably, polyvinylidene fluoride, polytetrafluoroethylene, polyamide, carboxymethyl cellulose, acrylic resin, or the like is used.
- the lithium-containing composite oxide powder, conductive material and binder of the present invention are made into a slurry or kneaded product using a solvent or dispersion medium, and this is applied to a positive electrode current collector such as an aluminum foil or a stainless steel foil.
- a positive electrode for a lithium secondary battery is produced by carrying it.
- a porous polyethylene film, a porous polypropylene film, or the like is used as the separator.
- a carbonate ester is preferable among various solvents that can be used. Carbonate ester can be used in either cyclic or chain form. Examples of the cyclic carbonate include propylene carbonate and ethylene carbonate (EC). Examples of the chain carbonate include dimethyl carbonate, jetyl carbonate (DEC), ethyl methyl carbonate (EMC), methyl propyl carbonate, and methyl isopropyl carbonate.
- the above carbonate esters can be used alone or in admixture of two or more. Further, it may be used by mixing with other solvents. Depending on the material of the negative electrode active material, the combined use of a chain carbonate ester and a cyclic carbonate ester may improve the discharge characteristics, cycle durability, and charge / discharge efficiency.
- the solvent of the electrolyte solution is a copolymer of vinylidene fluoride-hexafluoropropylene (for example, product name: Kyner, manufactured by Atchem Co.) or copolymer of vinylidene fluoride-perfluoropolypropylene ether. You may mix and use the gel polymer electrolyte containing coalescence.
- the electrolyte added to the electrolyte solvent or polymer electrolyte is CIO "
- any one or more lithium salts to be turned on are preferably used.
- the amount of the electrolyte is preferably added at a concentration of 0.2 to 2 OmolZl (liter) with respect to the electrolyte solution or the polymer electrolyte. Beyond this range, the ionic conductivity decreases and the electrical conductivity of the electrolyte decreases. Furthermore, 0.5 to 1.5 molZl is more preferable.
- the negative electrode active material a material capable of inserting and extracting lithium ions is used as the negative electrode active material.
- the material forming this negative electrode active material is not particularly limited.
- lithium metal, lithium alloy, carbon material, carbon compound, silicon carbide compound, silicon oxide compound, titanium sulfate, boron carbide compound, and oxides mainly composed of metals of Periodic Table 14 or 15 Can be mentioned.
- the carbon material those obtained by pyrolyzing organic substances under various pyrolysis conditions, artificial graphite, natural black lead, soil graphite, expanded graphite, flake graphite, and the like can be used.
- the acid compound a compound mainly composed of acid tin can be used.
- the negative electrode current collector copper foil, nickel foil or the like is used. Such a negative electrode is preferably produced by kneading the negative electrode active material with an organic solvent to form a slurry, and applying, drying, and pressing the slurry onto a metal foil current collector.
- the shape of the lithium battery using the lithium-containing composite oxide of the present invention as the positive electrode active material is not particularly limited. Sheets, films, folds, wound bottomed cylinders, buttons, etc. are selected according to the application.
- This precursor is calcined in air at 950 ° C for 12 hours, and the calcined product is pulverized to obtain a substantially spherical, lithium-containing composite acid having a composition of LiCo Mg O in which primary particles are aggregated.
- a chemical powder was obtained.
- the specific surface area determined by the BET method was 0.34 m 2 / g.
- the lithium-containing composite oxide powder was measured for X-ray diffraction spectrum using an X-ray diffractometer (RINT 2100 model, manufactured by Rigaku Corporation).
- RINT 2100 model manufactured by Rigaku Corporation
- the press density of this powder was 3.07 g / cm 3 .
- 10 g of this powder was dispersed in 100 g of pure water, and after filtration, potentiometric titration with 0.1 NHC1 was performed to determine the residual alkali amount, which was 0.02% by weight.
- the lithium-containing composite oxide powder, acetylene black, and polyvinylidene fluoride powder were mixed at a weight ratio of 90/5/5, and N-methylpyrrolidone was added to prepare a slurry.
- One-side coating was performed on a 20 / zm thick aluminum foil using a doctor blade. Next, the coated product was dried, and roll press rolling was performed 5 times to produce a positive electrode sheet for a lithium battery.
- the above positive electrode sheet is punched out! /, Using a positive electrode as the positive electrode, a metal lithium foil having a thickness of 500 ⁇ m as the negative electrode, a nickel foil of 20 / zm as the negative electrode current collector, and a separator. Uses 25 m thick porous polypropylene, and the electrolyte contains 1M LiPF / EC + DE.
- the positive electrode active material lg was charged to 4.3 V at a load current of 75 mA at 25 ° C, and the positive electrode active material lg was discharged to 2.5 V at a load current of 75 mA.
- the initial discharge capacity was determined.
- the density of the electrode layer was determined.
- the battery was subjected to 30 charge / discharge cycle tests. As a result, the initial weight capacity density of the positive electrode layer at 25 ° C. and 2.5 to 4.3 V was 160 mAhZg, and the capacity retention rate after 30 charge / discharge cycles was 98.3%.
- the other battery was charged at 4.3V for 10 hours, disassembled in an argon glove box, the charged positive electrode sheet was taken out, the positive electrode sheet was washed, and then punched out to a diameter of 3 mm. Then, it was sealed in an aluminum capsule together with EC, heated at a rate of 5 ° CZ with a scanning differential calorimeter, and the heat generation start temperature was measured. As a result, the heat generation start temperature of the 4.3V charged product was 163 ° C.
- a precursor having a composition ratio of 0.99 0.0 was obtained.
- This precursor was calcined in air at 950 ° C for 12 hours, then crushed, and LiCo Mg O
- Example 2 Using the above lithium-containing composite oxide powder, in the same manner as in Example 1, a positive electrode body was manufactured, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer at 25 ° C. and 2.5 to 4.3 V was 160 mAhZg, and the capacity retention rate after 30 charge / discharge cycles was 98.2%.
- the heat generation start temperature of the 4.3V charged product was 164 ° C.
- Example 2 25 g of magnesium carbonate, 62 g of commercially available aluminum citrate and 64 g of citrate were added to 300 Og of pure water and dissolved, and an aqueous solution of carboxylic acid salt (concentration of carboxylate: 3. 8% by weight) was obtained.
- a mixture of 5000 g of cobalt hydroxide and 1956 g of lithium carbonate was stirred at 250 rpm in a Laedige mixer apparatus, mixed and dried at 100 ° C., and the above carboxylate aqueous solution was sprayed with a spray nozzle.
- This precursor was calcined in air at 950 ° C for 12 hours and then crushed to produce LiCo Mg Al
- a substantially spherical lithium-containing composite oxide powder having an O composition was obtained. About this powder
- the average particle diameter D50 is 13.2 ⁇ m, D10 force S7.2 m, and D90 force 18.6 ⁇ m, and is determined by the powerful BET method. It surface area force was ⁇ 0.34 m 2 / g.
- the integrated width of the diffraction peak on the (110) plane at 2 ⁇ 66.5 ⁇ 1 ° was 0.114 °.
- the press density of this powder was 3.07 gZcm 3 , and the residual alkali amount was determined by potentiometric titration and found to be 0.02% by weight.
- Example 3 The same conditions as in Example 3 were applied, but only the hydroxide-cobalt powder was put into a Laedige mixer, stirred at 250 rpm, mixed and dried at 110 ° C, and the aqueous carboxylate solution was sprinkled. The precursor was sprayed with a re-nozzle to obtain a composition ratio of Co Mg A1. Gain
- Lithium carbonate powder 1917g and lithium fluoride powder 27.5g were weighed and mixed with the obtained precursor, and then calcined under the same conditions as in Example 1.
- the particle size distribution of the lithium-containing composite oxide powder obtained by agglomerating primary particles obtained by pulverizing the fired product was measured in water using a laser scattering particle size distribution measuring device.
- the average particle size was D50 force 13.4 m, D10 force 7.3 m, D90 force 18.7 ⁇ m, and the specific surface area determined by the BET method was 0.37 m 2 / g.
- Example 3 The same procedure as in Example 3 was performed except that an aqueous solution (carboxylate concentration: 16% by weight) was used to obtain a lithium-containing composite oxide powder having a composition of Li Al Co Mg Zr O.
- the press density of the powder was 3. llg / cm 3 .
- Example 6 a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 161 mAhZg, the capacity retention rate after 30 cycles was 99.1%, and the heat generation start temperature was 171 ° C. [0050] [Example 6]
- Example 5 The same procedure as in Example 5 was performed except that the concentration was 19% by weight.
- the resulting precursor was mixed with 1997 g of lithium carbonate 950.
- a lithium-containing composite oxide powder was obtained. This powder has a press density of 3. llg / cm 3 .
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 159 mAhZg, the capacity retention rate after 30 cycles was 99.0%, and the heat generation start temperature was 169 ° C.
- Example 6 The same procedure as in Example 6 was performed except that 5108 g of commercially available oxycobalt hydroxide (cobalt content: 61.5% by weight, average particle size D50: 14.7 m) was used instead of cobalt hydroxide.
- the obtained lithium-containing composite oxide powder having the composition of LiAl Co Mg Zr O
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 159 mAhZg, the capacity retention rate after 30 cycles was 99.2%, and the heat generation start temperature was 170 ° C.
- Example 6 The same procedure as in Example 6 was performed, except that 4207 g of commercially available cobalt tetraoxide (cobalt content: 73.1 wt%, average particle diameter D50: 15.7 m) was used instead of cobalt hydroxide. Average of lithium-containing composite oxide powder with the composition of LiAl Co Mg Zr O obtained
- the particle size D50 was 15.2 m and the press density was 3.07 gZcm 3 .
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 159 mAhZg, the capacity retention rate after 30 cycles was 99.1%, and the heat generation start temperature was 169 ° C.
- Aqueous solution was prepared in the same manner as in Example 6 except that an aqueous solution added with 61 g was used.
- the obtained precursor and 1997 g of lithium carbonate were mixed, heated to 500 ° C at a rate of 7 ° CZ, and then fired at the first stage for 5 hours at 500 ° C. Subsequently, without further crushing and pulverization, the temperature was raised to 950 ° C at a rate of 7 ° CZ, and the second stage baking was performed at 950 ° C for 14 hours in the air.
- the press density of the titanium-containing composite oxide powder was 3.16 g / cm 3 .
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 159 mAhZg, the capacity retention rate after 30 charge / discharge cycles was 98.9%, and the heat generation start temperature was 167 ° C.
- NiCoMn co-precipitated hydroxide Ni / Co / Mn
- a precursor having a composition ratio of Co Mn Mg was obtained. This precursor is 950 ° C in air
- a mixed oxide powder was obtained.
- the average particle diameter D50 of the powder obtained by crushing the fired product was 10.2 m, and the specific surface area determined by BET method was 0.50 m 2 / g.
- the press density was 2.90 g / cm 3 .
- the initial weight capacity density at 25 ° C and 2.5 to 4.3 V is 160 mAhZg, and the capacity retention rate after 30 charge / discharge cycles is 97. It was 0%.
- the heat generation start temperature of the 4.3V charged product was 193 ° C.
- Example 1 Og lithium carbonate 1956g and magnesium carbonate 51g were dry-mixed using a drum mixer, then calcined in air at 950 ° C for 12 hours, and then pulverized.
- a lithium-containing composite oxide powder having two compositions was obtained.
- the average particle size D50 of this powder was 13.2 m and the press density was 3.01 gZcm 3 .
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 160 mAhZg, the capacity retention rate after 30 cycles was 95.1%, and the heat generation start temperature was 161 ° C.
- Example 6 The same conditions as in Example 6, but using a drum-type mixer instead of using a Redige mixer apparatus. That is, 5000 g of hydroxy-cobalt powder was put into a drum type mixer apparatus.
- the obtained precursor and 1997 g of lithium carbonate were mixed, then calcined at 950 ° C. for 12 hours and pulverized to obtain a lithium-containing composite oxide powder having a composition of LiAl Co Mg Zr O
- the average particle size D50 measured using a laser scattering particle size distribution analyzer was 20.5 m, and the press density was 3. OlgZcm 3 .
- the amount of residual alkali in this powder was determined by potentiometric titration and was 0.06% by weight.
- a positive electrode body was produced in the same manner as in Example 1, a battery was assembled, and its characteristics were measured.
- the initial weight capacity density of the positive electrode layer was 156 mAhZg, the capacity retention rate after 30 cycles was 97.0%, and the heat generation start temperature was 163 ° C.
- Example 6 The same conditions as in Example 6 5000 g of hydroxyaluminum cobalt was charged into a Laedige mixer, and as an aqueous solution, 158 g of commercially available aluminum lactate, 52 g of magnesium carbonate, and 283 g of citrate were dissolved in 1000 g of water.
- Zr content 15.1 wt 0/0 of zirconyl carbonate two Ruanmo - ⁇ beam From a carboxylic acid salt with a pH of 9.5 to which 325 g of (NH) [Zr (CO) (OH)] aqueous solution was added
- the resulting aqueous solution (the concentration of the carboxylic acid compound in the solution: 19% by weight) was dropped and mixed without using a spray device.
- the dampened powder was dried at 100 ° C while stirring at 250 rpm.
- the precursor after drying formed a granulated body at the time of drying, and was unable to perform subsequent lithium salt.
- the lithium-containing composite oxide obtained by the present invention is widely used as a positive electrode active material for a positive electrode of a lithium secondary battery.
- a lithium secondary battery having a positive electrode with a high volume capacity density, high safety, excellent charge / discharge cycle durability, and excellent low-temperature characteristics is provided.
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- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
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| KR1020077020735A KR101130588B1 (ko) | 2005-05-17 | 2006-05-17 | 리튬 2 차 전지 정극용 리튬 함유 복합 산화물의 제조 방법 |
| JP2007516324A JP5132307B2 (ja) | 2005-05-17 | 2006-05-17 | リチウム二次電池正極用のリチウム含有複合酸化物の製造方法 |
| US11/942,208 US20080076027A1 (en) | 2005-05-17 | 2007-11-19 | Process for producing lithium-containing composite oxide for positive electrode of lithium secondary battery |
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| JP (1) | JP5132307B2 (ja) |
| KR (1) | KR101130588B1 (ja) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007119340A (ja) * | 2005-09-29 | 2007-05-17 | Seimi Chem Co Ltd | リチウム含有複合酸化物の製造方法 |
| JP2010218982A (ja) * | 2009-03-18 | 2010-09-30 | Hitachi Maxell Ltd | 非水二次電池 |
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| JP5286938B2 (ja) * | 2008-05-27 | 2013-09-11 | 東京エレクトロン株式会社 | 針跡検査装置、プローブ装置、及び針跡検査方法、並びに記憶媒体 |
| CN104882599A (zh) * | 2015-05-19 | 2015-09-02 | 华南理工大学 | 一种高容量锂离子电池用富锂三元正极材料及其制备方法 |
| KR102256296B1 (ko) * | 2016-08-02 | 2021-05-26 | 삼성에스디아이 주식회사 | 리튬이차전지용 리튬 코발트 복합 산화물 및 이를 포함한 양극을 함유한 리튬이차전지 |
| KR102256299B1 (ko) * | 2016-08-02 | 2021-05-26 | 삼성에스디아이 주식회사 | 리튬이차전지용 리튬 코발트 복합 산화물 및 이를 포함한 양극을 함유한 리튬이차전지 |
| KR102469157B1 (ko) * | 2017-05-12 | 2022-11-18 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 양극 활물질 입자 |
| FI3728134T3 (fi) * | 2017-12-22 | 2023-10-03 | Umicore Nv | Positiivinen elektrodimateriaali ladattavia litiumioniakkuja varten ja niiden valmistusmenetelmiä |
| KR102521605B1 (ko) | 2018-03-02 | 2023-04-12 | 유미코아 | 재충전가능 리튬 이온 배터리용 양극 물질 |
| JP7202393B2 (ja) | 2018-03-29 | 2023-01-11 | ユミコア | 充電式リチウムイオン電池用の正極材料を調製する方法 |
| CN110492097B (zh) * | 2019-08-30 | 2021-04-27 | 中南大学 | 一种ncm三元复合正极材料及其制备和应用 |
| JP7060649B2 (ja) * | 2020-05-22 | 2022-04-26 | Basf戸田バッテリーマテリアルズ合同会社 | 非水電解質二次電池用正極活物質の製造方法 |
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| JP4666653B2 (ja) * | 2004-05-14 | 2011-04-06 | Agcセイミケミカル株式会社 | リチウム二次電池正極用のリチウム含有複合酸化物の製造方法 |
| WO2006085588A1 (ja) * | 2005-02-14 | 2006-08-17 | Agc Seimi Chemical Co., Ltd. | リチウム二次電池正極用のリチウム含有複合酸化物の製造方法 |
| KR101130589B1 (ko) * | 2005-05-17 | 2012-03-30 | 에이지씨 세이미 케미칼 가부시키가이샤 | 리튬 2 차 전지 정극용 리튬 함유 복합 산화물의 제조 방법 |
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- 2006-05-17 KR KR1020077020735A patent/KR101130588B1/ko not_active Expired - Fee Related
- 2006-05-17 JP JP2007516324A patent/JP5132307B2/ja not_active Expired - Fee Related
- 2006-05-17 CN CNB2006800162762A patent/CN100541879C/zh not_active Expired - Fee Related
- 2006-05-17 WO PCT/JP2006/309849 patent/WO2006123710A1/ja not_active Ceased
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- 2007-11-19 US US11/942,208 patent/US20080076027A1/en not_active Abandoned
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| JP2010218982A (ja) * | 2009-03-18 | 2010-09-30 | Hitachi Maxell Ltd | 非水二次電池 |
Also Published As
| Publication number | Publication date |
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| CN100541879C (zh) | 2009-09-16 |
| JPWO2006123710A1 (ja) | 2008-12-25 |
| CN101176227A (zh) | 2008-05-07 |
| KR20080009058A (ko) | 2008-01-24 |
| KR101130588B1 (ko) | 2012-03-30 |
| JP5132307B2 (ja) | 2013-01-30 |
| US20080076027A1 (en) | 2008-03-27 |
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