WO2015008863A1 - ニッケル-マンガン系複合オキシ水酸化物、その製造方法、及びその用途 - Google Patents
ニッケル-マンガン系複合オキシ水酸化物、その製造方法、及びその用途 Download PDFInfo
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- 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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- 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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Definitions
- the present invention relates to a nickel-manganese composite oxyhydroxide, a method for producing the same, and a use thereof. Specifically, nickel-manganese composite oxyhydroxide, a method for producing the same, lithium-nickel-manganese composite oxide obtained using the composite oxyhydroxide, and lithium using the composite oxide as a positive electrode
- the present invention relates to a secondary battery.
- the lithium-nickel-manganese composite oxide has a superlattice structure in which nickel and manganese are regularly arranged.
- the method for producing a lithium-nickel-manganese composite oxide includes a solid phase reaction method in which a nickel source and a manganese source are mixed and fired, a composite hydroxide containing nickel and manganese, and a composite oxyhydroxide. There is a manufacturing method using as a precursor.
- the composite hydroxide or composite oxyhydroxide containing nickel and manganese is a preferable precursor when the ordered arrangement of nickel and manganese is premised because the metal is more uniformly distributed.
- a nickel-manganese composite hydroxide obtained by a coprecipitation method under an inert atmosphere is disclosed as a precursor of a lithium-nickel-manganese composite oxide (Patent Document 1 and Non-Patent Document 1). reference).
- Patent Document 1 when a nickel-manganese-iron composite metal hydroxide is separated into solid and liquid co-precipitate slurry and stored for a long time as a wet cake, manganese oxide (Mn 3 O It has been pointed out that 4 ) is a by-product. Moreover, when the composite metal hydroxide containing Mn 3 O 4 as a by-product and a lithium compound are mixed and fired, the product lithium composite metal oxide has a non-uniform composition, and this lithium composite metal It has been pointed out that battery performance using oxides is insufficient.
- Ni x Mn 1-x (OH) 2 is obtained by converting manganese oxide (Mn 3 O 4 ) when drying a wet cake with x ⁇ 1/3.
- Mn 3 O 4 manganese oxide
- the nickel-manganese composite hydroxide having a relatively high manganese composition is unstable in the atmosphere, and there is a problem that the Mn component segregates despite the coprecipitate.
- An object of the present invention is a nickel-manganese complex oxyhydroxide, which is a complex compound of nickel and manganese, which is stable in the air and does not cause segregation of manganese components in processes such as coprecipitation, washing and drying. Is to provide things. Furthermore, an object of the present invention is to provide a lithium-nickel-manganese composite oxide using a nickel-manganese composite oxyhydroxide and a lithium secondary using the lithium-nickel-manganese composite oxide as a positive electrode. It is to provide a battery.
- the present inventors diligently studied a precursor of a lithium-nickel-manganese composite oxide.
- an oxyhydroxide having a specific structure similar to a hydroxide is stable in the atmosphere even if the chemical composition of Mn is relatively high, and manganese oxide (Mn 3 O 4 ) was not produced as a by-product, Mn component was not segregated, and the metal element was highly dispersible.
- a lithium secondary battery using such a nickel-manganese composite oxyhydroxide as a precursor and a lithium-nickel-manganese composite oxide obtained from the composite oxyhydroxide as a positive electrode has a small 4V potential flat portion. The inventors have found that the energy density is particularly high, and have completed the present invention.
- the present invention has the following gist.
- the chemical composition formula is Ni (0.25 + ⁇ ) ⁇ x M1 x Mn (0.75 ⁇ ) ⁇ y M2 y OOH (where M1 and M2 are independently Mg, Al, Ti, V, (Represents one selected from Cr, Fe, Co, Cu, Zn and Zr, 0 ⁇ x ⁇ 0.1, 0 ⁇ y ⁇ 0.25, and ⁇ 0.025 ⁇ ⁇ ⁇ 0.025) And a nickel-manganese composite oxyhydroxide characterized by having a hexagonal cadmium hydroxide structure.
- Metal salt aqueous solution Metal salt aqueous solution containing nickel and manganese, or one or more selected from the group consisting of Mg, Al, Ti, V, Cr, Fe, Co, Cu, Zn and Zr, containing nickel and manganese Metal salt aqueous solution containing oxidizing agent; aerobic gas or hydrogen peroxide solution (6)
- the production method according to (5) further comprising adding a complexing agent.
- the complexing agent is ammonia, an ammonium salt, or an amino acid.
- a lithium-nickel-manganese composite oxide obtained by mixing and heat-treating the nickel-manganese composite oxyhydroxide according to any one of (1) to (4) above and a lithium compound.
- the nickel-manganese composite oxyhydroxide of the present invention is stable in the air, does not produce manganese oxide (Mn 3 O 4 ) as a by-product during long-term storage or drying, and further segregates Mn components.
- the metal element has high dispersibility and is useful as a precursor of a lithium-nickel-manganese composite oxide used as a positive electrode of a lithium secondary battery.
- FIG. 3 is an XRD pattern of the nickel-manganese composite oxyhydroxide of Example 1.
- FIG. 2 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 2.
- FIG. 3 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 3.
- FIG. 4 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 4.
- 6 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 5.
- FIG. 7 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 6.
- FIG. 6 is an XRD pattern of the lithium-nickel-manganese composite oxide of Example 7 (the arrow in the figure indicates a superlattice peak).
- FIG. 6 is an XRD pattern of the lithium-nickel-manganese composite oxide of Example 8 (the arrow in the figure indicates a superlattice peak).
- 4 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 9.
- 3 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 10.
- 4 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 11.
- 4 is an XRD pattern of a nickel-manganese composite oxyhydroxide of Example 12.
- 4 is an XRD pattern of a magnesium-substituted nickel-manganese composite oxyhydroxide of Example 13.
- 4 is an XRD pattern of an iron-substituted nickel-manganese composite oxyhydroxide of Example 14.
- 6 is an XRD pattern of a cobalt-substituted nickel-manganese composite oxyhydroxide of Example 15.
- 6 is an XRD pattern of a copper-substituted nickel-manganese composite oxyhydroxide of Example 16.
- FIG. 2 is an XRD pattern of a nickel-manganese composite compound of Comparative Example 1.
- FIG. 3 is an XRD pattern of a nickel-manganese composite compound of Comparative Example 2.
- FIG. 4 is an XRD pattern of a nickel-manganese composite compound of Comparative Example 3.
- FIG. 2 is a scanning electron micrograph of the nickel-manganese composite oxyhydroxide of Example 1.
- FIG. 2 is a particle size distribution curve of a nickel-manganese composite oxyhydroxide of Example 1.
- FIG. 6 is a scanning electron micrograph of the nickel-manganese composite oxyhydroxide of Example 5.
- FIG. 6 is a scanning electron micrograph of the nickel-manganese composite oxyhydroxide of Example 6.
- FIG. 2 is a scanning electron micrograph of the nickel-manganese composite oxyhydroxide of Example 11.
- FIG. 4 is a scanning electron micrograph of the nickel-manganese composite oxyhydroxide of Example 12.
- FIG. 4 is a scanning electron micrograph of the lithium-nickel-manganese composite oxide of Example 7.
- FIG. FIG. 6 is a charge / discharge curve of the lithium-nickel-manganese composite oxide of Example 7 (2 to 4 cycles).
- FIG. FIG. 10 is a charge / discharge cycle performance chart of Example 7 (1 to 30 cycles).
- 4 is a scanning electron micrograph of the lithium-nickel-manganese composite oxide of Example 8.
- FIG. 6 is a charge / discharge curve of the lithium-nickel-manganese composite oxide of Example 8 (2 to 4 cycles).
- FIG. 10 is a charge / discharge cycle performance chart of Example 8 (1 to 30 cycles).
- the nickel-manganese composite oxyhydroxide of the present invention has a chemical composition formula of Ni (0.25 + ⁇ ) -x M1 x Mn (0.75- ⁇ ) -y M2 y OOH (where M1 and M2 are respectively Independently represents one selected from Mg, Al, Ti, V, Cr, Fe, Co, Cu, Zn and Zr, 0 ⁇ x ⁇ 0.1, 0 ⁇ y ⁇ 0.25, ⁇ 0 .025 ⁇ ⁇ ⁇ 0.025).
- Ni + M1 0.25 ⁇ 0.025
- Mn + M2 0.75 ⁇ 0.025
- Battery capacity in the vicinity of 5V decreases.
- Ni + M1 is preferably 0.25 ⁇ 0.01
- Mn + M2 is preferably 0.75 ⁇ 0.01.
- ⁇ is ⁇ 0.025 ⁇ ⁇ ⁇ 0.025.
- ⁇ is out of this range, it deviates from the formal valences of Ni 2+ and Mn 4+ and is around 5 V (Li The battery capacity of the metal negative electrode reference) decreases.
- the improvement of performance in particular, the stability of the charge / discharge cycle and the effect of suppressing elution of Mn can be expected.
- the degree of ordering of the Ni—Mn ordered arrangement in the spinel type sublattice is lowered, and the battery capacity in the vicinity of 5 V (based on the Li metal negative electrode) is lowered.
- 0 ⁇ x ⁇ 0.1 and 0 ⁇ y ⁇ 0.25 are preferable, and 0 ⁇ x ⁇ 0.05 and 0 ⁇ y ⁇ 0.1 are more preferable.
- the amount of substitution of different elements for Ni is small.
- Preferred specific chemical compositions of the nickel-manganese composite oxyhydroxide of the present invention include, for example, Ni 0.25 Mn 0.75 OOH, Ni 0.25 Mn 0.65 Ti 0.10 OOH, Ni 0 .20 Fe 0.05 Mn 0.75 OOH, Ni 0.23 Mg 0.02 Mn 0.75 OOH, Ni 0.225 Mg 0.025 Mn 0.75 OOH, Ni 0.225 Co 0.05 Mn 0 .725 OOH (Ni 0.225 Co 0.025 Mn 0.725 Co 0.025 OOH), Ni 0.23 Zn 0.02 Mn 0.75, and the like. Of these, Ni 0.25 Mn 0.75 OOH is preferable.
- the nickel-manganese composite oxyhydroxide of the present invention is a cadmium hydroxide type oxyhydroxide having a hexagonal crystal structure.
- the ⁇ -type nickel hydroxide type structure has a relatively wide transition metal layer, and therefore, an anion that can be an impurity such as SO 4 is easily incorporated.
- a cadmium hydroxide type crystal structure is preferable because anions are not taken in between the transition metal layers.
- the cadmium hydroxide type structure is a crystal structure in which hydroxide ions are arranged at the positions of iodide ions in the hexagonal cadmium iodide type structure, and the hydroxide ions have a nearly hexagonal close-packed structure.
- the metal ions are located in the octahedral hexacoordinate gaps every other layer in the c-axis direction.
- metal ions such as nickel, manganese, M1, and M2 are located instead of the cadmium ions in the cadmium hydroxide structure.
- the tap density of the nickel-manganese composite oxyhydroxide of the present invention is preferably 1.0 g / cm 3 or more, since the filling property of the positive electrode active material in the electrode affects the energy density, and 1.5 g / Cm 3 or more is more preferable, and 2.0 g / cm 3 or more is particularly preferable. Of these, 1.7 to 2.2 g / cm 3 is most preferable. If the tap density is 1.0 g / cm 3 or more, the filling property of the lithium-nickel-manganese composite oxide obtained using the nickel-manganese composite oxyhydroxide of the present invention as a raw material tends to be high.
- the nickel-manganese composite oxyhydroxide of the present invention has a theoretical average valence of trivalent, and the average valence of Ni, Mn, M1 and M2 in the chemical composition formula is 2.8 to 3.1. It is preferable that 2.9 to 3.0 is more preferable.
- the average valence is determined by an iodometry method. The theoretical average valence is based on the formal oxidation number.
- the specific surface area of the nickel-manganese composite oxyhydroxide of the present invention is not particularly limited, but it is preferably 70 m 2 / g or less, because high filling properties are easily obtained, and preferably 50 m 2 / g or less. Is more preferably 35 m 2 / g or less, and most preferably 10 m 2 / g or less. Of these, 5 to 35 m 2 / g is extremely preferable. In general, since the filling property and the specific surface area have a correlation, a powder having a high filling property is easily obtained with a low specific surface area.
- the average particle size of the nickel-manganese composite oxyhydroxide of the present invention is preferably 5 to 20 ⁇ m and more preferably 5 to 10 ⁇ m in order to adapt to the particle size at which an electrode can be easily formed.
- the average particle diameter is an average particle diameter of secondary particles in which primary particles are aggregated, that is, a so-called aggregated particle diameter.
- the particle size distribution of the nickel-manganese composite oxyhydroxide of the present invention is not particularly limited, and examples thereof include a monodispersed particle size distribution and a bimodal particle size distribution. When the particle size distribution is monodispersed, that is, a mono-modal distribution, the particle size is uniform even when the positive electrode is used, and the charge / discharge reaction is also more uniform. .
- the nickel-manganese composite oxyhydroxide of the present invention has a chemical composition formula of Ni (0.25 + ⁇ ) -x M1 x Mn (0.75- ⁇ ) -y M2 y OOH (where M1 and M2 are respectively Independently represents one selected from Mg, Al, Ti, V, Cr, Fe, Co, Cu, Zn and Zr, 0 ⁇ x ⁇ 0.1, 0 ⁇ y ⁇ 0.25, ⁇ 0 .025 ⁇ ⁇ ⁇ 0.025).
- the nickel-manganese composite oxyhydroxide of the present invention is different from those included in the chemical composition formula as long as the effect is not hindered, for example, alkali metals such as Mg, Ca, Na, K, and alkaline earth metals Etc. may be contained. These Mg and the like are preferably as small as possible, but if they are contained in an appropriate amount, an effect of improving the cycle performance may be seen. However, when the content of these metals exceeds 1000 ppm, problems such as an increase in 4V potential flat portion capacity and loss of energy density occur. Therefore, 1000 ppm or less is preferable, 20 to 1000 ppm is more preferable, 200 to 1000 ppm is more preferable, and 300 to 600 ppm is particularly preferable.
- the nickel-manganese composite oxyhydroxide of the present invention is selected from the group consisting of nickel and manganese, or nickel and manganese, and Mg, Al, Ti, V, Cr, Fe, Co, Cu, Zn, and Zr.
- An aqueous metal salt solution containing at least seeds, an aqueous caustic soda solution, and an aerobic gas or hydrogen peroxide solution as an oxidizing agent are mixed at pH 8.5 to 10 to obtain a mixed aqueous solution. It can manufacture by depositing a system composite oxyhydroxide to obtain a slurry.
- the aqueous metal salt solution contains at least nickel and manganese, and can further contain one or more metals selected from the group consisting of Mg, Al, Ti, V, Cr, Fe, Co, Cu, Zn, and Zr.
- the metal salt aqueous solution include nickel, manganese, and other predetermined metals, in which sulfate, chloride, nitrate, acetate, etc. are dissolved, inorganic acid such as sulfuric acid, hydrochloric acid, nitric acid, or acetic acid.
- An aqueous solution in which nickel, manganese, and other predetermined metals are dissolved in an organic acid can be used.
- an aqueous solution containing nickel sulfate and manganese sulfate can be exemplified.
- the ratio of nickel, manganese, and other predetermined metals in the aqueous metal salt solution should be the ratio of nickel, manganese, and other predetermined metals in the target nickel-manganese composite oxyhydroxide. You can do it.
- preferable ranges of ⁇ , x, and y are as described above.
- the total concentration (metal concentration) of all metals such as nickel and manganese in the metal salt aqueous solution is arbitrary, since the metal concentration affects the productivity, 1.0 mol / L or more is preferable, and 2.0 mol / L The above is more preferable.
- the caustic soda aqueous solution is a sodium hydroxide aqueous solution.
- a sodium hydroxide aqueous solution obtained by dissolving solid sodium hydroxide in water, a sodium hydroxide aqueous solution generated by salt electrolysis or the like, and a concentration adjusted with water can be used.
- the concentration of the aqueous caustic soda solution is preferably 10 to 48% by weight, more preferably 15 to 25% by weight.
- the oxidizing agent is an oxygen-containing gas or a hydrogen peroxide solution.
- the oxidizing agent is not an oxygen-containing gas or hydrogen peroxide solution, for example, when sodium persulfate, sodium chlorate or the like is used, the target oxyhydroxide cannot be obtained.
- the oxygen-containing gas include air and oxygen. Economically, air is the most preferred. Gases such as air and oxygen are added by bubbling with a bubbler or the like.
- the hydrogen peroxide solution can be mixed with a metal salt aqueous solution or a caustic soda aqueous solution. Examples of the concentration of the hydrogen peroxide solution include 3 to 30% by weight, preferably 3 to 10% by weight.
- a mixed aqueous solution can be obtained by mixing an aqueous solution of metal salt, an aqueous solution of caustic soda, and an aerobic gas or hydrogen peroxide solution as an oxidizing agent at a pH of 8.5 to 10.
- the nickel-manganese composite oxyhydroxide of the present invention precipitates in the mixed aqueous solution and is obtained as a slurry.
- the pH exceeds 10
- a crystal phase other than the cadmium hydroxide type structure is formed, and fine particles are likely to be formed. Such fine particles have low filtration / washing efficiency, and the production efficiency is remarkably lowered.
- the crystalline phase does not have a cadmium hydroxide structure, but a mixed phase of ⁇ -type oxyhydroxide or spinel-type oxide, and the target nickel-manganese composite oxyhydroxide is obtained. It becomes difficult to precipitate.
- pH 9 to 10 is preferred.
- the temperature at which the metal salt aqueous solution, the caustic soda aqueous solution and the oxidizing agent are mixed is not particularly limited, but the oxidation reaction of the metal salt aqueous solution is easy to proceed, and the nickel-manganese composite oxyhydroxide is more easily precipitated. Therefore, it is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and particularly preferably 60 to 70 ° C.
- the temperature to mix can also be 80 degreeC or more depending on the following complexing agent to be used, the above low temperature is preferable on a manufacturing process.
- PH may fluctuate by mixing metal salt aqueous solution, caustic soda aqueous solution and oxidizing agent.
- the pH can be controlled by appropriately mixing an alkaline aqueous solution other than the caustic soda aqueous solution into the mixed aqueous solution. Mixing of the alkaline aqueous solution other than the caustic soda aqueous solution may be performed continuously or intermittently.
- the alkaline aqueous solution other than the caustic soda aqueous solution include aqueous solutions of alkali metals such as potassium hydroxide and lithium hydroxide.
- the alkali concentration of the aqueous alkali solution can be exemplified by 1 mol / L or more, but 1 to 10 mol / L is preferable.
- a complexing agent can be added.
- a complexing agent is present, the solubility of nickel ions increases, the particle surface becomes smooth, and the sphericity is improved. As a result, there is an advantage that the tap density is improved.
- ammonia, ammonium salts or amino acids are preferred.
- ammonia ammonia water etc. are illustrated, for example.
- ammonium salts include ammonium sulfate, ammonium chloride, ammonium nitrate, and ammonium carbonate, with ammonium sulfate being particularly preferred.
- amino acids include glycine, alanine, asparagine, glutamine, lysine and the like, and glycine is particularly preferable.
- the complexing agent is preferably fed with an aqueous metal salt solution.
- concentration is preferably 0.1 to 2, more preferably 0.5 to 1, as the NH 3 / transition metal molar ratio.
- amino acids are used, the amino acid / transition metal molar ratio is preferably 0.001 to 0.25, more preferably 0.005 to 0.1.
- the production of the nickel-manganese composite oxyhydroxide of the present invention does not necessarily require atmospheric control, and can be carried out in a normal atmospheric atmosphere.
- the method for producing the nickel-manganese composite oxyhydroxide may be either a batch type or a continuous type.
- the mixing time is arbitrary. For example, 3 to 48 hours can be mentioned, and further 6 to 24 hours can be mentioned.
- the average residence time in which the nickel-manganese composite oxyhydroxide particles stay in the reaction vessel is preferably 1 to 30 hours, and more preferably 3 to 20 hours.
- the method for producing a nickel-manganese composite oxyhydroxide of the present invention it is preferable that after the nickel-manganese composite oxyhydroxide is precipitated, the resulting slurry is filtered, and the cake is washed and dried. Washing is performed to remove impurities adhering to or adsorbing to the nickel-manganese composite oxyhydroxide.
- the cleaning method include a method of adding nickel-manganese composite oxyhydroxide to water (for example, pure water, tap water, river water, etc.), stirring and cleaning.
- Drying is performed to remove moisture from the nickel-manganese composite oxyhydroxide.
- the drying method include a method of drying nickel-manganese composite oxyhydroxide at 110 to 150 ° C. for 2 to 15 hours. Drying is performed using an apparatus such as a convection heat transfer drying or a radiation heat transfer drying method.
- pulverization may be performed after washing and drying.
- the pulverization is performed to obtain a powder having an average particle size suitable for the application.
- the pulverization conditions are arbitrary as long as the desired average particle diameter can be obtained. Examples thereof include wet pulverization and dry pulverization.
- the nickel-manganese composite oxyhydroxide of the present invention has a high dispersibility of metal elements, and can be used for producing a lithium-nickel-manganese composite oxide.
- the production method includes nickel-manganese composite oxyhydroxide, lithium, and a lithium compound.
- the mixing ratio of the nickel-manganese composite oxyhydroxide and the lithium raw material used in the production of the lithium-nickel-manganese composite oxide of the present invention is preferably 0.50 to 0.55 in terms of a lithium / transition metal molar ratio. 0.51 to 0.53 is more preferable.
- the mixing can be performed by dry mixing or wet processing, but the method is arbitrary. Examples of dry mixing include mixing using a Henschel mixer.
- any lithium compound can be used.
- the lithium compound include one or more selected from the group consisting of lithium hydroxide, lithium oxide, lithium carbonate, lithium iodide, lithium nitrate, lithium oxalate, and alkyl lithium.
- examples of preferable lithium compounds include one or more selected from the group consisting of lithium hydroxide, lithium oxide, and lithium carbonate.
- the respective raw materials are mixed and then fired using a muffle electric furnace or the like to produce a lithium-nickel-manganese composite oxide.
- Firing can be performed at a temperature of 500 to 1000 ° C., preferably 800 to 1000 ° C., in various atmospheres such as air and oxygen.
- the obtained lithium-nickel-manganese composite oxide can be used as a positive electrode active material of a lithium secondary battery.
- metallic lithium, lithium, or a material capable of occluding and releasing lithium ions can be used.
- examples thereof include metallic lithium, lithium / aluminum alloy, lithium / tin alloy, lithium / lead alloy, and carbon material that can electrochemically insert and desorb lithium ions.
- a carbon material capable of electrochemically inserting and removing lithium ions is particularly preferably used from the viewpoint of safety and battery characteristics.
- the electrolyte used in the lithium secondary battery of the present invention is not particularly limited.
- a solid electrolyte can be used. Of these, carbonates are preferred.
- the separator used in the lithium secondary battery of the present invention is not particularly limited. For example, a microporous film made of polyethylene or polypropylene can be used.
- a mixture of the lithium-nickel-manganese composite oxide of the present invention and a conductive agent is molded into a pellet form, and then 100 to 200 ° C., preferably 150 to A molded product obtained by drying under reduced pressure at 200 ° C. is used as a positive electrode for a battery, and a negative electrode made of a metal lithium foil and an electrolytic solution in which lithium hexafluorophosphate is dissolved in a mixed solvent of ethylene carbonate and diethyl carbonate.
- a mixture of the lithium-nickel-manganese composite oxide of the present invention and a conductive agent is molded into a pellet form, and then 100 to 200 ° C., preferably 150 to A molded product obtained by drying under reduced pressure at 200 ° C. is used as a positive electrode for a battery, and a negative electrode made of a metal lithium foil and an electrolytic solution in which lithium hexafluorophosphate is dissolved in a mixed solvent of ethylene carbonate and diethy
- composition analysis of the composite oxyhydroxide was performed by inductively coupled plasma emission spectrometry (ICP method). That is, the complex oxyhydroxide was dissolved in a mixed solution of hydrochloric acid and hydrogen peroxide to prepare a measurement solution. The obtained measurement solution was analyzed using an inductively coupled plasma emission spectrometer (trade name: OPTIMA 3000 DV, manufactured by PERKIN ELMER) to determine the chemical composition.
- ICP method inductively coupled plasma emission spectrometry
- ⁇ Measurement of metal valence> The average valence of metals such as nickel and manganese was measured by iodometry. 0.3 g of complex oxyhydroxide and 3.0 g of potassium iodide were dissolved in 50 ml of 7N-hydrochloric acid solution, and then neutralized by adding 200 ml of 1N-NaOH solution. A 0.1N sodium thiosulfate aqueous solution was dropped into the neutralized sample solution, and the average valence was calculated from the amount dropped. A starch solution was used as an indicator.
- ⁇ Powder X-ray diffraction measurement> The powder X-ray diffraction measurement of the sample was performed using an X-ray diffractometer (trade name: MXP-3, manufactured by Mac Science).
- MXP-3 X-ray diffractometer
- the composite oxyhydroxide 0.5g was thrown in 50 mL of 0.1N ammonia water, and it ultrasonically irradiated for 10 second to make a dispersion slurry.
- the dispersed slurry was put into a particle size distribution measuring device (trade name: Microtrac HRA, manufactured by HONEWELL), and volume distribution was measured by a laser diffraction method.
- the particle size distribution and average particle size ( ⁇ m) were determined from the obtained volume distribution.
- Lithium-nickel-manganese composite oxide and a mixture of polytetrafluoroethylene and acetylene black (trade name: TAB-2) as a conductive agent were mixed at a weight ratio of 4: 1 and 1 ton / cm 2. After forming into a pellet shape on a mesh (manufactured by SUS316) at a pressure of 150 ° C., it was dried under reduced pressure at 150 ° C. to produce a battery positive electrode.
- the battery voltage was charged / discharged at a constant current between 4.9 V and 3.0 V for 30 cycles at room temperature.
- the current density during charge / discharge was 0.4 mA / cm 2 .
- Example 1 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 1.5 mol / L (liter) of nickel sulfate and 0.5 mol / L of manganese sulfate. The total concentration of all metals in the metal salt aqueous solution was 2.0 mol / L. Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 80 degreeC and maintained.
- the obtained aqueous metal salt solution was added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was intermittently added so that the pH was 10 when supplying the metal salt aqueous solution and air to obtain a mixed aqueous solution.
- nickel-manganese composite oxyhydroxide was precipitated, and a slurry was obtained.
- the obtained slurry was filtered and washed with pure water, and then the wet cake was air-dried in the air for 1 week. Thereafter, the resultant was dried at 115 ° C. for 5 hours to obtain a nickel-manganese composite oxyhydroxide (Ni 0.25 Mn 0.75 OOH).
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 2 A slurry was obtained in the same manner as in Example 1, except that the oxidizing agent was oxygen and a 2 mol / L sodium hydroxide aqueous solution was intermittently added so that the pH was 8.5. The obtained slurry was filtered, washed, and dried in the same manner as in Example 1 to obtain a nickel-manganese composite oxyhydroxide (Ni 0.25 Mn 0.75 OOH).
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 3 A slurry was obtained in the same manner as in Example 1 except that the oxidizing agent was 15 wt% aqueous hydrogen peroxide (feed rate: 0.34 g / min). The obtained slurry was filtered, washed, and dried in the same manner as in Example 1 to obtain a nickel-manganese composite oxyhydroxide (Ni 0.25 Mn 0.75 OOH). .
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 4 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 1.5 mol / L nickel sulfate and 0.5 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L). Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 80 degreeC and maintained.
- the metal salt aqueous solution and a 1.0 mol / L ammonium sulfate solution were added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was intermittently added so that the pH was 9 when supplying the metal salt aqueous solution and air to obtain a mixed aqueous solution.
- nickel-manganese composite oxyhydroxide was precipitated to obtain a slurry.
- Ni 0.24 Mn 0.76 OOH nickel-manganese composite oxyhydroxide
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 5 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 1.5 mol / L nickel sulfate and 0.5 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L). Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 60 degreeC and maintained.
- the metal salt aqueous solution and 0.25 mol / L ammonium sulfate solution were continuously added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was continuously added to obtain a mixed aqueous solution so that the pH was 9.25.
- nickel-manganese composite oxyhydroxide was precipitated, and a slurry was continuously obtained from the lower part of the reaction tank.
- the average stay time was 15 hours.
- Ni 0.25 Mn 0.75 OOH nickel-manganese composite oxyhydroxide
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Examples 1 to 6 are nickel-manganese composite oxyhydroxides having a hexagonal cadmium hydroxide structure and an average valence of metal close to 3. Furthermore, in Examples 1 to 6, it was confirmed by XRD pattern analysis that manganese oxide (Mn 3 O 4 ) was not by-produced.
- Example 7 The nickel-manganese composite oxyhydroxide obtained in Example 4 and lithium carbonate (a lithium / transition metal molar ratio of 0.52) were mixed using a Henschel mixer, and the mixture was air-flowed at 900 ° C. for 12 hours. After firing, the lithium-nickel-manganese composite oxide was synthesized by firing at 700 ° C. for 48 hours. From the result of chemical composition analysis, the composition formula can be expressed as Li 2 NiMn 3 O 8 . Further, from the XRD pattern, superlattice peaks corresponding to the nickel-manganese ordered arrangement were clearly observed at a plurality of arrows in FIG.
- the battery performance of the obtained lithium-nickel-manganese composite oxide was evaluated. As a result, it was found from the charge / discharge curve that the potential flat portion near 4V corresponding to Mn4 + / 3 + redox was as small as about 2 mAh / g, and the capacity near 5V corresponding to Ni4 + / 3 + redox was not impaired. . Moreover, since a capacity
- Example 8 The nickel-manganese composite oxyhydroxide obtained in Example 6 and lithium carbonate were mixed, calcined at 800 ° C. for 10 hours in an air stream, and then calcined at 700 ° C. for 48 hours to obtain lithium-nickel. -Manganese complex oxide was synthesized. From the result of chemical composition analysis, the composition formula could be expressed as Li 2 NiMn 3 O 8 . Further, from the XRD pattern, superlattice peaks corresponding to the nickel-manganese ordered arrangement were clearly observed at a plurality of arrows in FIG.
- the battery performance of the obtained lithium-nickel-manganese composite oxide was evaluated. As a result, it was found from the charge / discharge curve that the potential flat portion in the vicinity of 4V corresponding to Mn4 + / 3 + redox was as small as about 2 mAh / g, and the capacity in the vicinity of 5V corresponding to Ni4 + / 3 + redox was not impaired. Moreover, since a capacity
- Example 9 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 0.46 mol / L nickel sulfate and 1.54 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L).
- a nickel-manganese composite oxyhydroxide (Ni 0.23 Mn 0.77 OOH) was obtained in the same manner as in Example 5 except that the composition of the metal salt was changed as described above.
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 10 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 0.54 mol / L nickel sulfate and 1.46 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L).
- a nickel-manganese composite oxyhydroxide (Ni 0.27 Mn 0.73 OOH) was obtained in the same manner as in Example 5 except that the composition of the metal salt was changed as described above.
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 11 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 1.5 mol / L nickel sulfate and 0.5 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L). Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 60 degreeC and maintained.
- the obtained metal salt aqueous solution and 0.1 mol / L glycine solution were continuously added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was continuously added so that the pH was 8.75 to obtain a mixed aqueous solution.
- nickel-manganese composite oxyhydroxide was precipitated, and a slurry was continuously obtained from the lower part of the reaction tank. The average stay time was 15 hours.
- Ni 0.25 Mn 0.75 OOH nickel-manganese composite oxyhydroxide
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 12 Nickel sulfate and manganese sulfate were dissolved in pure water to obtain an aqueous solution (metal salt aqueous solution) containing 1.5 mol / L nickel sulfate and 0.5 mol / L manganese sulfate (total of all metals in the metal salt aqueous solution). The concentration was 2.0 mol / L). Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 70 degreeC and maintained.
- the obtained metal salt aqueous solution and 0.01 mol / L glycine solution were continuously added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was continuously added to obtain a mixed aqueous solution so that the pH was 9.25.
- nickel-manganese composite oxyhydroxide was precipitated, and a slurry was continuously obtained from the lower part of the reaction tank. The average stay time was 15 hours.
- Ni 0.25 Mn 0.75 OOH nickel-manganese composite oxyhydroxide
- the measurement results of the nickel-manganese composite oxyhydroxide are shown in Table 1.
- Example 13 Magnesium sulfate, nickel sulfate, and manganese sulfate are dissolved in pure water, and an aqueous solution (metal salt aqueous solution) containing 0.05 mol / L magnesium sulfate, 0.45 mol / L nickel sulfate, and 1.5 mol / L manganese sulfate. (The total concentration of all metals in the aqueous metal salt solution was 2.0 mol / L). Moreover, after putting 200g of pure waters into the reaction container of 1L of internal volumes, this was heated up to 80 degreeC and maintained.
- aqueous metal salt solution and 0.25 mol / L ammonium sulfate solution were added to the reaction vessel at a supply rate of 0.28 g / min. Further, air was bubbled into the reaction vessel as an oxidizing agent at a supply rate of 1 L / min.
- a 2 mol / L sodium hydroxide aqueous solution (caustic soda aqueous solution) was intermittently added to obtain a mixed aqueous solution so that the pH was 9.25 when supplying the metal salt aqueous solution and air.
- nickel-manganese composite oxyhydroxide was precipitated to obtain a slurry.
- the obtained slurry was filtered and washed with pure water, and then the wet cake was air-dried in the air for 1 week. Thereafter, the resultant was dried at 115 ° C. for 5 hours to obtain a magnesium-substituted nickel-manganese composite oxyhydroxide (Ni 0.225 Mg 0.025 Mn 0.75 OOH).
- Example 14 An aqueous solution (metal salt aqueous solution) containing iron sulfate, nickel sulfate, and manganese sulfate dissolved in pure water and containing 0.10 mol / L iron sulfate, 0.45 mol / L nickel sulfate, and 1.45 mol / L manganese sulfate (The total concentration of all metals in the aqueous metal salt solution was 2.0 mol / L)
- an iron-substituted nickel-manganese composite oxyhydroxide [Ni 0. 225 Fe 0.05 Mn 0.725 OOH (Ni 0.225 Fe 0.025 Mn 0.725 Fe 0.025 OOH)] was obtained.
- Example 15 An aqueous solution (metal salt aqueous solution) containing cobalt sulfate, nickel sulfate and manganese sulfate dissolved in pure water and containing 0.10 mol / L cobalt sulfate, 0.45 mol / L nickel sulfate and 1.45 mol / L manganese sulfate (The total concentration of all metals in the aqueous metal salt solution was 2.0 mol / L)
- a cobalt-substituted nickel-manganese composite oxyhydroxide [Ni 0. 225 Co 0.05 Mn 0.725 OOH (Ni 0.225 Co 0.025 Mn 0.725 Co 0.025 OOH)] was obtained.
- Example 16 An aqueous solution (metal salt aqueous solution) containing 0.05 mol / L copper sulfate, 0.45 mol / L nickel sulfate and 1.5 mol / L manganese sulfate, in which copper sulfate, nickel sulfate and manganese sulfate are dissolved in pure water (The total concentration of all metals in the aqueous metal salt solution was 2.0 mol / L)
- a copper-substituted nickel-manganese composite oxyhydroxide Ni 0. 225 Cu 0.025 Mn 0.75 OOH.
- Examples 9 to 14 are all nickel-manganese composite oxyhydroxides having a hexagonal cadmium hydroxide structure and an average valence of metal close to 3, or specific metal-substituted nickel- It was found to be a manganese-based composite oxyhydroxide. Further, in Examples 9 to 14, it was confirmed by XRD pattern analysis that manganese oxide (Mn 3 O 4 ) was not by-produced.
- Comparative Example 1 A slurry was obtained in the same manner as in Example 2 except that the pH was changed to 7. The obtained slurry was filtered, washed and dried in the same manner as in Example 2 to obtain a nickel-manganese composite compound.
- the obtained nickel-manganese composite compound was found to be a mixed phase of spinel oxide and ⁇ -Ni (OH) 2 hydroxide in its XRD pattern. The measurement results of the nickel-manganese composite compound are shown in Table 2.
- Example 2 A slurry was obtained in the same manner as in Example 1 except that the pH was 11. The obtained slurry was filtered, washed and dried in the same manner as in Example 1 to obtain a nickel-manganese composite compound. The obtained nickel-manganese composite compound was found to be a mixed phase of cadmium hydroxide type oxyhydroxide and spinel type oxide in its XRD pattern. The measurement results of the nickel-manganese composite compound are shown in Table 2.
- Comparative Example 3 A slurry was obtained in the same manner as in Example 1 except that the oxidizing agent was a 30 wt% sodium persulfate aqueous solution (feed rate: 0.28 g / min). The obtained slurry was filtered, washed and dried in the same manner as in Example 1 to obtain a nickel-manganese composite compound. The obtained nickel-manganese composite compound had a pattern shape that is different from the cadmium hydroxide type oxyhydroxide in the XRD pattern, and that all peak shapes are considered to be broad layered compounds.
- the measurement results of the nickel-manganese composite compound are shown in Table 2. As is apparent from Table 2, in the reaction using oxygen gas at pH 7 and 11, and in the reaction using sodium persulfate different from oxygen gas and hydrogen peroxide as the oxidant, the oxygen of cadmium hydroxide structure A single crystal phase of hydroxide was not obtained.
- the nickel-manganese composite oxyhydroxide of the present invention can be used as a precursor of a lithium-nickel-manganese composite oxide used for a positive electrode active material of a lithium secondary battery, and the lithium-nickel- Manganese complex oxide can constitute a high-performance lithium secondary battery as a positive electrode material for a battery.
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Abstract
Description
リチウム-ニッケル-マンガン系複合酸化物は、ニッケルとマンガンとが規則配列した超格子構造である。
例えば、リチウム-ニッケル-マンガン系複合酸化物の前駆体として、不活性雰囲気下の共沈法により得られたニッケル-マンガン複合水酸化物が開示されている(特許文献1、及び非特許文献1参照)。
このように、比較的マンガン組成の高いニッケル-マンガン複合水酸化物は、大気中で不安定であり、共沈物にもかかわらず、Mn成分が偏析するという課題がある。
さらに、本発明の目的は、ニッケル-マンガン系複合オキシ水酸化物を用いたリチウム-ニッケル-マンガン系複合酸化物の提供と、該リチウム-ニッケル-マンガン系複合酸化物を正極とするリチウム二次電池を提供することである。
(1)化学組成式がNi(0.25+α)-xM1xMn(0.75-α)-yM2yOOH(但し、M1及びM2は、それぞれ独立に、Mg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrから選ばれる1種を表し、0≦x≦0.1、0≦y≦0.25であり、-0.025≦α≦0.025である)で表され、かつ結晶構造が六方晶系の水酸化カドミウム型構造であることを特徴とするニッケル-マンガン系複合オキシ水酸化物。
(2)αが0である上記(1)に記載のニッケル-マンガン系複合オキシ水酸化物。
(3)Ni、Mn、M1及びM2の平均原子価が2.8~3.1である上記(1)又は(2)に記載のニッケル-マンガン系複合オキシ水酸化物。
(4)平均粒子径が、5~20μmである上記(1)~(3)のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物。
(5)下記の金属塩水溶液、苛性ソーダ水溶液、及び下記の酸化剤を、pH8.5~10で混合して混合水溶液とし、該混合水溶液中で析出させることを特徴とする上記(1)~(4)のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物の製造方法。
金属塩水溶液;ニッケル及びマンガンを含む金属塩水溶液、又はニッケル及びマンガンを含み、さらにMg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrからなる群から選ばれる1種以上を含む金属塩水溶液
酸化剤;有酸素ガス又は過酸化水素水
(6)さらに、錯化剤を添加する、上記(5)に記載の製造方法。
(7)前記錯化剤が、アンモニア、アンモニウム塩又はアミノ酸である、上記(6)に記載の製造方法。
(8)上記(1)~(4)のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物とリチウム化合物とを混合し、熱処理して得られるリチウム-ニッケル-マンガン系複合酸化物。
(9)上記(8)に記載のリチウム-ニッケル-マンガン系複合酸化物を、正極活物質として使用することを特徴とするリチウム二次電池。
スピネル型副格子内のNi-Mn規則配列の規則度や、5V付近(Li金属負極基準)の電池容量を維持するため、Niに対する異種元素の置換量は少ない方が好ましい。
水酸化カドミウム型構造とは、六方晶系のヨウ化カドミウム型構造のヨウ化物イオンの位置に、水酸化物イオンが配置した結晶構造であり、水酸化物イオンが、ほぼ六方最密充填構造に配置し、c軸方向の層の一つおきに八面体六配位の間隙に金属イオンが位置する。
本発明のニッケル-マンガン系複合オキシ水酸化物の結晶構造では、水酸化カドミウム型構造中のカドミウムイオンの代わりに、ニッケル、マンガン、M1、M2等の金属イオンが位置する。
タップ密度が1.0g/cm3以上であれば、本発明のニッケル-マンガン系複合オキシ水酸化物を原料として得られるリチウム-ニッケル-マンガン系複合酸化物の充填性が高くなりやすい。
一般的には、充填性と比表面積とは相関関係があるため、低比表面積の方が高い充填性の粉末が得られやすい。
本発明のニッケル-マンガン系複合オキシ水酸化物の粒子径分布は、特に限定されるものではなく、例えば、単分散の粒子径分布、二峰性の粒子径分布等が挙げられる。単分散、すなわち、モノモーダル(Mono-modal)な分布を有する粒子径分布である場合には、正極とした際にも粒子径が均一であるため、その充放電反応もより均一なものとなる。
本発明のニッケル-マンガン系複合オキシ水酸化物は、その効果を阻害しない限り、化学組成式に含まれるものとは別に、例えば、Mg、Ca、Na、K等のアルカリ金属、アルカリ土類金属等を含有していてもよい。これらのMg等は、極力少ない方が好ましいが、適量含むことで、サイクル性能向上の効果がみられる場合がある。しかし、これら金属の含有量が1000ppmを超えると、4V電位平坦部容量が増加し、エネルギー密度が損なわれるなどの課題が生ずる。そのため、1000ppm以下が好ましく、20~1000ppmがより好ましく、200~1000ppmがさらに好ましく、300~600ppmが特に好ましい。
本発明のニッケル-マンガン系複合オキシ水酸化物は、ニッケル及びマンガン、又はニッケル及びマンガン、並びにMg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrからなる群から選ばれる1種以上を含む金属塩水溶液、苛性ソーダ水溶液、及び酸化剤として有酸素ガス又は過酸化水素水を、pH8.5~10で混合して混合水溶液を得た後、該混合水溶液中で、ニッケル-マンガン系複合オキシ水酸化物を析出させて、スラリーを得ることにより製造することができる。
金属塩水溶液としては、ニッケル及びマンガン、さらに他の所定の金属を含む、硫酸塩、塩化物、硝酸塩、酢酸塩などを溶解させた水溶液、硫酸、塩酸、硝酸などの無機酸、あるいは酢酸などの有機酸に、ニッケル及びマンガン、さらに他の所定の金属を溶解した水溶液、等を挙げることができる。好ましい金属塩水溶液としては、硫酸ニッケル及び硫酸マンガンを含む水溶液を例示することができる。
金属塩水溶液中のニッケル、マンガン、及び他の所定の金属の割合は、モル比で、Ni+M1:Mn+M2=0.25+α:0.75-α、Ni:M1=(0.25+α)-x:x、Mn:M2=(0.75-α)-y:y(M1及びM2は、それぞれ独立に、Mg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrから選ばれる1種を表し、0≦x≦0.1、0≦y≦0.25であり、-0.025≦α≦0.025である)を挙げることができる。ここで、α、x、及びyの好ましい範囲などは、上記したとおりである。
苛性ソーダ水溶液の濃度は、10~48重量%が好ましく、15~25重量%がより好ましい。
なお、混合する温度は、使用する下記の錯化剤によっては、80℃以上とすることもできるが、製造工程上は、上記のような、低い温度が好ましい。
錯化剤としては、アンモニア、アンモニウム塩又はアミノ酸が好適である。
アンモニウム塩としては、例えば、硫酸アンモニウム、塩化アンモニウム、硝酸アンモニウム、炭酸アンモニウム等が例示され、硫酸アンモニウムが特に好ましい。
アミノ酸としては、例えば、グリシン、アラニン、アスパラギン、グルタミン、リシン等が例示され、グリシンが特に好ましい。
ニッケル-マンガン系複合オキシ水酸化物の製造方法は、バッチ式、連続式のどちらでもよい。バッチ式の場合、混合時間は任意である。例えば、3~48時間が挙げられ、さらには6~24時間を挙げることができる。一方、連続式の場合、ニッケル-マンガン系複合オキシ水酸化物粒子が、反応容器内に滞在する平均滞在時間は、1~30時間が好ましく、3~20時間がより好ましい。
洗浄は、ニッケル-マンガン系複合オキシ水酸化物に付着、あるいは吸着した不純物を除去するために行う。洗浄方法としては、水(例えば、純水、水道水、河川水等)に、ニッケル-マンガン系複合オキシ水酸化物を添加し、撹拌して洗浄する方法が例示できる。
粉砕は、用途に適した平均粒子径の粉末とするために行う。所望の平均粒子径が得られる方法であれば、粉砕条件は任意であり、例えば、湿式粉砕、乾式粉砕等の方法が例示できる。
本発明のニッケル-マンガン系複合オキシ水酸化物を原料として、リチウム-ニッケル-マンガン系複合酸化物を製造する場合、その製造方法は、ニッケル-マンガン系複合オキシ水酸化物と、リチウム及びリチウム化合物からなる群から選ばれる少なくとも一種とを、混合する工程(混合工程)と熱処理する工程(焼成工程)とを有することが好ましい。
また、混合は乾式混合、湿式により可能であるが、その方法は任意である。乾式混合ではヘンシェルミキサーを用いた混合を例示できる。
本発明のリチウム二次電池に用いる負極活物質としては、金属リチウム、リチウム、又はリチウムイオンを吸蔵放出可能な物質を用いることができる。例えば、金属リチウム、リチウム/アルミニウム合金、リチウム/スズ合金、リチウム/鉛合金、電気化学的にリチウムイオンを挿入・脱離することができる炭素材料等が例示される。中でも、電気化学的にリチウムイオンを挿入・脱離することができる炭素材料が、安全性及び電池の特性の面から、特に好適に用いられる。
本発明のリチウム二次電池で用いるセパレーターは、特に制限はないが、例えば、ポリエチレン製、ポリプロピレン製などの微細多孔膜等を用いることができる。
複合オキシ水酸化物(複合化合物)の組成分析は、誘導結合プラズマ発光分析法(ICP法)により行った。すなわち、複合オキシ水酸化物を塩酸、及び過酸化水素の混合溶液に溶解させ、測定溶液を調製した。得られた測定溶液を誘導結合プラズマ発光分析装置(商品名:OPTIMA3000DV、PERKIN ELMER社製)を用いて分析し、化学組成を確定した。
ニッケル、マンガンなどの金属の平均原子価は、ヨードメトリーにより測定した。複合オキシ水酸化物0.3gとヨウ化カリウム3.0gを、7N-塩酸溶液50mlに溶解させた後、1N-NaOH溶液200mlを添加して中和した。中和した試料液に対して、0.1N-チオ硫酸ナトリウム水溶液を滴下し、滴下量から平均原子価を計算した。なお、指示薬にはでんぷん溶液を用いた。
X線回折装置(商品名:MXP-3、マックサイエンス社製)を使用し、試料の粉末X線回折測定を行った。線源にはCuKα線(λ=1.5405Å)を用い、測定モードはステップスキャンであり、スキャン条件は毎秒0.04°、計測時間は3秒、測定範囲は2θとして5°~100°の範囲で測定した。
上記の条件のXRD測定で得られたXRDパターンにおいて、2θ=19.0±0.5°にシャープなピークを有し、36.9±1.5°、48.0±3.5°、62.0±5.0°、及び65.0±5.0°にブロードなXRDピークを有することをもって、結晶相が、六方晶系の水酸化カドミウム構造であるとした。最低角以外のピーク形状がブロードであるのは積層欠陥の影響である。
複合オキシ水酸化物0.5gを0.1Nアンモニア水50mL中に投入し、10秒間超音波照射して分散スラリーとした。該分散スラリーを粒度分布測定装置(商品名:マイクロトラックHRA、HONEWELL社製)に投入し、レーザー回折法で体積分布の測定を行なった。得られた体積分布から粒度分布及び平均粒子径(μm)を求めた。
複合オキシ水酸化物2gを10mL(ミリリットル)のガラス製メスシリンダーに充填し、これを200回タッピング(tapping)した。重量及びタッピング後の体積から、タップ密度(g/cm3)を算出した。
流動式比表面積自動測定装置(商品名:フローソーブ3-2305、Micrometrics社製)を用い、複合オキシ水酸化物1.0gを窒素気流中150℃、1時間前処理した後、BET1点法にて吸脱着面積を測定した後、重量で除することで比表面積(m2/g)を求めた。
リチウム-ニッケル-マンガン系複合酸化物と、導電剤のポリテトラフルオロエチレンとアセチレンブラックとの混合物(商品名:TAB-2)とを、重量比4:1の割合で混合し、1ton/cm2の圧力で、メッシュ(SUS316製)上にペレット状に成型した後、150℃で減圧乾燥し、電池用正極を作製した。
得られた電池用正極と、金属リチウム箔(厚さ0.2mm)からなる負極、及びエチレンカーボネートとジエチルカーボネートとの混合溶媒に六フッ化リン酸リチウムを1mol/dm3の濃度で溶解した電解液を用いて、リチウム二次電池を構成した。当該リチウム二次電池を用いて、定電流で、電池電圧が4.9Vから3.0Vの間を、室温下で30サイクル充放電させた。充放電時の電流密度は0.4mA/cm2とした。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、1.5mol/L(リットル)の硫酸ニッケル及び0.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た。金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった。
また、内容積1Lの反応容器に純水200gを入れた後、これを80℃まで昇温し、維持した。
酸化剤を酸素とし、pHが8.5となるように2mol/Lの水酸化ナトリウム水溶液を断続的に添加したこと以外は、実施例1と同様な方法でスラリーを得た。得られたスラリーを、実施例1と同様にして、ろ過し、洗浄した後、乾燥することで、ニッケル-マンガン系複合オキシ水酸化物(Ni0.25Mn0.75OOH)を得た。
酸化剤を15重量%過酸化水素水(供給速度0.34g/min)としたこと以外は、実施例1と同様な方法でスラリーを得た。得られたスラリーを、実施例1と同様な方法で、ろ過し、洗浄した後、乾燥することで、ニッケル-マンガン系複合オキシ水酸化物(Ni0.25Mn0.75OOH)を得た。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、1.5mol/Lの硫酸ニッケル及び0.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は、2.0mol/Lであった)。
また、内容積1Lの反応容器に純水200gを入れた後、これを80℃まで昇温し、維持した。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、1.5mol/Lの硫酸ニッケル及び0.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
また、内容積1Lの反応容器に純水200gを入れた後、これを60℃まで昇温し、維持した。
pHを9.0、硫酸アンモニウム溶液の濃度を0.5mol/Lとした以外は、実施例5と同様な方法で、ニッケル-マンガン系複合オキシ水酸化物(Ni0.25Mn0.75OOH)を得た。
得られたニッケル-マンガン系複合オキシ水酸化物のXRDパターンが、2θ=19.0°に極めてシャープなピークを有し、2θ=40°以降にブロードなピークを有することなどの解析から、その結晶構造は、積層欠陥を有する水酸化カドミウム構造であるが確認できた。
表1より、実施例1~6は、いずれも六方晶系の水酸化カドミウム構造を有し、金属の平均原子価が3に近いニッケル-マンガン系複合オキシ水酸化物であることが分かった。さらに、実施例1~6では、マンガン酸化物(Mn3O4)が副生していないことが、XRDパターンの解析により確認できた。
実施例4で得られたニッケル-マンガン系複合オキシ水酸化物と炭酸リチウムと(リチウム/遷移金属モル比0.52)を、ヘンシェルミキサーを用いて混合し、空気流中、900℃で12時間焼成した後、700℃で48時間焼成することにより、リチウム-ニッケル-マンガン系複合酸化物を合成した。化学組成分析の結果から、組成式はLi2NiMn3O8と表すことができる。
また、XRDパターンからは、ニッケル-マンガン規則配列に対応する超格子ピークが、図7中の複数の矢印箇所に明瞭に観察された。
実施例6で得られたニッケル-マンガン系複合オキシ水酸化物と炭酸リチウムとを混合し、空気流中、800℃で10時間焼成した後、700℃で48時間焼成することにより、リチウム-ニッケル-マンガン系複合酸化物を合成した。化学組成分析の結果から、組成式はLi2NiMn3O8と表すことができた。
また、XRDパターンからは、ニッケル-マンガン規則配列に対応する超格子ピークが、図8中の複数の矢印箇所に明瞭に観察された。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、0.46mol/Lの硫酸ニッケル及び1.54mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
金属塩の組成を前記のように変更した以外は、実施例5と同様にして、ニッケル-マンガン系複合オキシ水酸化物(Ni0.23Mn0.77OOH)を得た。
得られたニッケル-マンガン系複合オキシ水酸化物のXRDパターンが、2θ=19.0°にシャープなピークを有し、2θ=40°以降にブロードなピークを有することなどの解析から、その結晶構造は、積層欠陥を有する水酸化カドミウム構造であるが確認できた。当該ニッケル-マンガン系複合オキシ水酸化物の測定結果を表1に示す。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、0.54mol/Lの硫酸ニッケル及び1.46mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
金属塩の組成を前記のように変更した以外は、実施例5と同様にして、ニッケル-マンガン系複合オキシ水酸化物(Ni0.27Mn0.73OOH)を得た。
得られたニッケル-マンガン系複合オキシ水酸化物のXRDパターンが、2θ=19.0°にシャープなピークを有し、2θ=40°以降にブロードなピークを有することなどの解析から、その結晶構造は、積層欠陥を有する水酸化カドミウム構造であるが確認できた。当該ニッケル-マンガン系複合オキシ水酸化物の測定結果を表1に示す。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、1.5mol/Lの硫酸ニッケル及び0.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
また、内容積1Lの反応容器に純水200gを入れた後、これを60℃まで昇温し、維持した。
硫酸ニッケル及び硫酸マンガンを純水に溶解し、1.5mol/Lの硫酸ニッケル及び0.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
また、内容積1Lの反応容器に純水200gを入れた後、これを70℃まで昇温し、維持した。
硫酸マグネシウム、硫酸ニッケル、及び硫酸マンガンを純水に溶解し、0.05mol/Lの硫酸マグネシウム、0.45mol/Lの硫酸ニッケル及び1.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)を得た(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)。
また、内容積1Lの反応容器に純水200gを入れた後、これを80℃まで昇温し、維持した。
当該マグネシウム置換ニッケル-マンガン系複合オキシ水酸化物の測定結果を表1に示す。
硫酸鉄、硫酸ニッケル、及び硫酸マンガンを純水に溶解し、0.10mol/Lの硫酸鉄、0.45mol/Lの硫酸ニッケル及び1.45mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)を調製した以外は、実施例13と同様にして、鉄置換ニッケル-マンガン系複合オキシ水酸化物[Ni0.225Fe0.05Mn0.725OOH(Ni0.225Fe0.025Mn0.725Fe0.025OOH)]を得た。
当該鉄置換ニッケル-マンガン系複合オキシ水酸化物の測定結果を表1に示す。
硫酸コバルト、硫酸ニッケル、及び硫酸マンガンを純水に溶解し、0.10mol/Lの硫酸コバルト、0.45mol/Lの硫酸ニッケル及び1.45mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)を調製した以外は、実施例13と同様にして、コバルト置換ニッケル-マンガン系複合オキシ水酸化物[Ni0.225Co0.05Mn0.725OOH(Ni0.225Co0.025Mn0.725Co0.025OOH)]を得た。
硫酸銅、硫酸ニッケル、及び硫酸マンガンを純水に溶解し、0.05mol/Lの硫酸銅、0.45mol/Lの硫酸ニッケル及び1.5mol/Lの硫酸マンガンを含む水溶液(金属塩水溶液)(金属塩水溶液中の全金属の合計濃度は2.0mol/Lであった)を調製した以外は、実施例13と同様にして、銅置換ニッケル-マンガン系複合オキシ水酸化物(Ni0.225Cu0.025Mn0.75OOH)を得た。
pHを7としたこと以外は、実施例2と同様な方法によりスラリーを得た。
得られたスラリーを、実施例2と同様にして、ろ過し、洗浄した後、乾燥することで、ニッケル-マンガン系複合化合物を得た。
得られたニッケル-マンガン系複合化合物は、そのXRDパターンにおいて、スピネル型酸化物とα-Ni(OH)2型水酸化物の混合相であることが分かった。当該ニッケル-マンガン系複合化合物の測定結果を表2に示す。
pHを11としたこと以外は、実施例1と同様な方法によりスラリーを得た。
得られたスラリーを、実施例1と同様にして、ろ過し、洗浄した後、乾燥することで、ニッケル-マンガン系複合化合物を得た。
得られたニッケル-マンガン系複合化合物は、そのXRDパターンにおいて、水酸化カドミウム型のオキシ水酸化物とスピネル型酸化物の混合相であることが分かった。当該ニッケル-マンガン系複合化合物の測定結果を表2に示す。
酸化剤を30重量%過硫酸ソーダ水溶液(供給速度0.28g/min)としたこと以外は、実施例1と同様な方法でスラリーを得た。
得られたスラリーを、実施例1と同様にして、ろ過し、洗浄した後、乾燥することで、ニッケル-マンガン系複合化合物を得た。
得られたニッケル-マンガン系複合化合物は、そのXRDパターンにおいて、水酸化カドミウム型のオキシ水酸化物とはピーク位置が異なり、全てのピーク形状がブロードな層状化合物と考えられるパターン形状を示した。
表2から明らかなように、pH7及び11で、有酸素ガスを用いた反応、及び酸化剤に有酸素ガス及び過酸化水素とは異なる過硫酸ソーダを用いた反応では、水酸化カドミウム構造のオキシ水酸化物の単一結晶相は得られなかった。
なお、2013年7月18日に出願された日本特許出願2013-149435号、及び2013年12月2日に出願された日本特許出願2013-249314号の明細書、特許請求の範囲、図面及び要約書の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。
Claims (9)
- 化学組成式がNi(0.25+α)-xM1xMn(0.75-α)-yM2yOOH(但し、M1及びM2は、それぞれ独立に、Mg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrから選ばれる1種を表し、0≦x≦0.1、0≦y≦0.25であり、-0.025≦α≦0.025である)で表され、かつ
結晶構造が六方晶系の水酸化カドミウム型構造であることを特徴とするニッケル-マンガン系複合オキシ水酸化物。 - αが0である請求項1に記載のニッケル-マンガン系複合オキシ水酸化物。
- Ni、Mn、M1及びM2の平均原子価が、2.8~3.1である請求項1又は2に記載のニッケル-マンガン系複合オキシ水酸化物。
- 平均粒子径が、5~20μmである請求項1~3のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物。
- 下記の金属塩水溶液、苛性ソーダ水溶液、及び下記の酸化剤を、pH8.5~10で混合して混合水溶液とし、該混合水溶液中で析出させることを特徴とする請求項1~4のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物の製造方法。
金属塩水溶液;ニッケル及びマンガンを含む金属塩水溶液、又はニッケル及びマンガンを含み、さらにMg、Al、Ti、V、Cr、Fe、Co、Cu、Zn及びZrからなる群から選ばれる1種以上を含む金属塩水溶液
酸化剤;有酸素ガス又は過酸化水素水 - さらに、錯化剤を添加する、請求項5に記載の製造方法。
- 前記錯化剤が、アンモニア、アンモニウム塩又はアミノ酸である、請求項6に記載の製造方法。
- 請求項1~4のいずれかに記載のニッケル-マンガン系複合オキシ水酸化物とリチウム化合物とを混合し、熱処理して得られるリチウム-ニッケル-マンガン系複合酸化物。
- 請求項8に記載のリチウム-ニッケル-マンガン系複合酸化物を、正極活物質として使用することを特徴とするリチウム二次電池。
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017105690A (ja) * | 2015-11-27 | 2017-06-15 | 東ソー株式会社 | ニッケル−マンガン−チタン系複合組成物及びその製造方法、並びにその用途 |
JP2017197406A (ja) * | 2016-04-27 | 2017-11-02 | 東ソー株式会社 | ニッケル−マンガン複合物の製造方法 |
CN107922212A (zh) * | 2015-08-24 | 2018-04-17 | 住友金属矿山株式会社 | 锰镍复合氢氧化物及制造方法、锂锰镍复合氧化物及制造方法、以及非水系电解质二次电池 |
CN108352523A (zh) * | 2016-02-29 | 2018-07-31 | 三井金属矿业株式会社 | 尖晶石型含锂锰复合氧化物 |
JP2018536972A (ja) * | 2016-03-04 | 2018-12-13 | エルジー・ケム・リミテッド | 二次電池用正極活物質の前駆体およびこれを用いて製造された正極活物質 |
EP3356297A4 (en) * | 2015-09-30 | 2019-05-15 | Umicore | PRECURSORS FOR LITHIUM TRANSITION METAL OXIDE CATHODE MATERIALS FOR RECHARGEABLE BATTERIES |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7170533B2 (ja) * | 2015-08-17 | 2022-11-14 | ビーエーエスエフ ソシエタス・ヨーロピア | 正極活性材料及びそれによる前駆体の製造方法、正極活性材料及びその使用 |
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WO2024037914A1 (en) * | 2022-08-15 | 2024-02-22 | Basf Se | Process for making an (oxy)hydroxide, and (oxy)hydroxide |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6254847B1 (en) * | 1997-04-15 | 2001-07-03 | Tateho Chemical Industries Co., Ltd. | Metal hydroxide solid solution, metal oxide solid solution and processes for their production |
JP2007070205A (ja) * | 2005-09-09 | 2007-03-22 | Tanaka Chemical Corp | ニッケルマンガンコバルト複合酸化物及びその製造方法 |
JP2008266136A (ja) * | 2003-04-17 | 2008-11-06 | Agc Seimi Chemical Co Ltd | リチウム−ニッケル−コバルト−マンガン含有複合酸化物とリチウム二次電池用正極活物質用原料およびその製造方法 |
JP2009515799A (ja) * | 2005-08-12 | 2009-04-16 | トダ・コウギョウ・ヨーロッパ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 無機化合物 |
JP2011153067A (ja) | 2009-12-28 | 2011-08-11 | Sumitomo Chemical Co Ltd | 複合金属水酸化物およびリチウム複合金属酸化物の製造方法ならびに非水電解質二次電池 |
WO2014098238A1 (ja) * | 2012-12-20 | 2014-06-26 | 東ソー株式会社 | ニッケル-コバルト-マンガン系複合酸化物及びその製造方法、並びにその用途 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100490613B1 (ko) * | 2000-03-13 | 2005-05-17 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 양극 활물질 및 그 제조방법 |
JP2003059490A (ja) * | 2001-08-17 | 2003-02-28 | Tanaka Chemical Corp | 非水電解質二次電池用正極活物質及びその製造方法 |
JP4475941B2 (ja) * | 2003-12-12 | 2010-06-09 | 日本化学工業株式会社 | リチウムマンガンニッケル複合酸化物の製造方法 |
US9136533B2 (en) * | 2006-01-20 | 2015-09-15 | Jx Nippon Mining & Metals Corporation | Lithium nickel manganese cobalt composite oxide and lithium rechargeable battery |
CN101127398A (zh) * | 2007-06-28 | 2008-02-20 | 河南师范大学 | 一种球形羟基氧化镍钴锰及其制备方法 |
DE102007039471A1 (de) * | 2007-08-21 | 2009-02-26 | H.C. Starck Gmbh | Pulverförmige Verbindungen, Verfahren zu deren Herstellung sowie deren Verwendung in Lithium-Sekundärbatterien |
AU2008319749B2 (en) * | 2007-11-01 | 2012-10-18 | Agc Seimi Chemical Co., Ltd. | Granulated powder of transition metal compound for raw material for positive electrode active material of lithium secondary battery, and method for producing the same |
KR101920485B1 (ko) * | 2011-09-26 | 2018-11-21 | 전자부품연구원 | 리튬 이차전지용 양극 활물질의 전구체, 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차전지 |
-
2014
- 2014-07-16 TW TW103124337A patent/TWI636613B/zh active
- 2014-07-18 KR KR1020157036108A patent/KR102196829B1/ko active IP Right Grant
- 2014-07-18 US US14/904,548 patent/US10122016B2/en active Active
- 2014-07-18 ES ES14826634.9T patent/ES2682200T3/es active Active
- 2014-07-18 WO PCT/JP2014/069238 patent/WO2015008863A1/ja active Application Filing
- 2014-07-18 CN CN201480040835.8A patent/CN105377766B/zh active Active
- 2014-07-18 EP EP14826634.9A patent/EP3023391B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6254847B1 (en) * | 1997-04-15 | 2001-07-03 | Tateho Chemical Industries Co., Ltd. | Metal hydroxide solid solution, metal oxide solid solution and processes for their production |
JP2008266136A (ja) * | 2003-04-17 | 2008-11-06 | Agc Seimi Chemical Co Ltd | リチウム−ニッケル−コバルト−マンガン含有複合酸化物とリチウム二次電池用正極活物質用原料およびその製造方法 |
JP2009515799A (ja) * | 2005-08-12 | 2009-04-16 | トダ・コウギョウ・ヨーロッパ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 無機化合物 |
JP2007070205A (ja) * | 2005-09-09 | 2007-03-22 | Tanaka Chemical Corp | ニッケルマンガンコバルト複合酸化物及びその製造方法 |
JP2011153067A (ja) | 2009-12-28 | 2011-08-11 | Sumitomo Chemical Co Ltd | 複合金属水酸化物およびリチウム複合金属酸化物の製造方法ならびに非水電解質二次電池 |
WO2014098238A1 (ja) * | 2012-12-20 | 2014-06-26 | 東ソー株式会社 | ニッケル-コバルト-マンガン系複合酸化物及びその製造方法、並びにその用途 |
Non-Patent Citations (1)
Title |
---|
F. ZHOU ET AL., CHEM. MATER, vol. 22, 2010, pages 1015 - 1021 |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107922212B (zh) * | 2015-08-24 | 2020-04-03 | 住友金属矿山株式会社 | 锰镍复合氢氧化物及制造方法、锂锰镍复合氧化物及制造方法、以及非水系电解质二次电池 |
CN107922212A (zh) * | 2015-08-24 | 2018-04-17 | 住友金属矿山株式会社 | 锰镍复合氢氧化物及制造方法、锂锰镍复合氧化物及制造方法、以及非水系电解质二次电池 |
US20180205079A1 (en) * | 2015-08-24 | 2018-07-19 | Sumitomo Metal Mining Co., Ltd. | Manganese nickel composite hydroxide and method for producing same, lithium manganese nickel composite oxide and method for producing same, and nonaqueous electrolyte secondary battery |
US10559823B2 (en) * | 2015-08-24 | 2020-02-11 | Sumitomo Metal Mining Co., Ltd. | Manganese nickel composite hydroxide and method for producing same, lithium manganese nickel composite oxide and method for producing same, and nonaqueous electrolyte secondary battery |
EP3356297A4 (en) * | 2015-09-30 | 2019-05-15 | Umicore | PRECURSORS FOR LITHIUM TRANSITION METAL OXIDE CATHODE MATERIALS FOR RECHARGEABLE BATTERIES |
US10547056B2 (en) | 2015-09-30 | 2020-01-28 | Umicore | Precursors for lithium transition metal oxide cathode materials for rechargeable batteries |
JP2017105690A (ja) * | 2015-11-27 | 2017-06-15 | 東ソー株式会社 | ニッケル−マンガン−チタン系複合組成物及びその製造方法、並びにその用途 |
CN108352523A (zh) * | 2016-02-29 | 2018-07-31 | 三井金属矿业株式会社 | 尖晶石型含锂锰复合氧化物 |
JP2018536972A (ja) * | 2016-03-04 | 2018-12-13 | エルジー・ケム・リミテッド | 二次電池用正極活物質の前駆体およびこれを用いて製造された正極活物質 |
US10700352B2 (en) | 2016-03-04 | 2020-06-30 | Lg Chem, Ltd. | Precursor of positive electrode active material for secondary battery and positive electrode active material prepared using the same |
JP2021180191A (ja) * | 2016-03-04 | 2021-11-18 | エルジー・ケム・リミテッド | 二次電池用正極活物質の前駆体およびこれを用いて製造された正極活物質 |
JP6991530B2 (ja) | 2016-03-04 | 2022-01-12 | エルジー・ケム・リミテッド | 二次電池用正極活物質の前駆体およびこれを用いて製造された正極活物質 |
JP2017197406A (ja) * | 2016-04-27 | 2017-11-02 | 東ソー株式会社 | ニッケル−マンガン複合物の製造方法 |
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EP3023391B1 (en) | 2018-05-30 |
KR20160032032A (ko) | 2016-03-23 |
EP3023391A4 (en) | 2016-12-28 |
EP3023391A1 (en) | 2016-05-25 |
KR102196829B1 (ko) | 2020-12-30 |
US20160156033A1 (en) | 2016-06-02 |
TW201507251A (zh) | 2015-02-16 |
CN105377766B (zh) | 2018-06-05 |
TWI636613B (zh) | 2018-09-21 |
CN105377766A (zh) | 2016-03-02 |
US10122016B2 (en) | 2018-11-06 |
ES2682200T3 (es) | 2018-09-19 |
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