Abstract:
Spherical particles of transition metal carbonates, transition metal hydroxides or transition metal carbonate hydroxides comprising cations of at least two transition metals selected from nickel, cobalt, manganese, titanium, vanadium, chromium and iron, wherein the concentration of at least one of the transition metal cations, plotted against the radius of the particle in question, has at least one relative extreme value which is neither in the center nor at the edge of the particle in question.
Abstract:
Spherical particles comprising (A) at least one mixed transition metal hydroxide or mixed transition metal carbonate of at least 3 different transition metals selected from nickel, cobalt, manganese, iron, chromium and vanadium, (B) at least one fluoride, oxide or hydroxide of Ba, Al, Zr or Ti, where the transition metals in transition metal hydroxide (A) or transition metal carbonate (A) are predominantly in the +2 oxidation state, where fluoride (B) or oxide (B) or hydroxide (B) is present to an extent of at least 75% in an outer shell of the spherical particles in the form of domains and is encased to an extent of at least 90% by transition metal hydroxide (A) or transition metal carbonate (A).
Abstract:
Disclosed herein is a method for making a particulate (oxy)hydroxide of TM, where TM is a combination of nickel and at least one metal selected from Co and Mn, the process including: (a) providing an aqueous solution (α) containing water-soluble salts of Ni and of at least one transition metal selected from Co and Mn, (b) combining a solution (α) and a solution (β) and, if applicable, a solution (γ) at a pH value in a range of from 12.0 to 13.0 determined at 23° C. in a continuous stirred tank reactor, thereby creating a slurry of solid particles of a hydroxide containing nickel, and (c) transferring slurry from step (b) into a batch-wise operated stirred tank reactor where a solution (α) and a solution (β) and optionally a solution (γ) are combined with the slurry at a pH value in a range of from 11.0 to 12.0 determined at 23° C.
Abstract:
Process for making a fluorinated lithiated transition metal oxide, comprising the step of treating a lithiated transition metal oxide containing at least two different transition metal cations and, as an impurity, at least one lithium compound selected from lithium hydroxide, lithium oxide and lithium carbonate and from combinations of at least two thereof, with at least one fluorine compound selected from HF, NH4F and (NH4)3AlF6.
Abstract:
Process for precipitating a mixed hydroxide of TM wherein TM comprises Ni and at least one of Co and Mn and, optionally, Al, Mg, Zr or Ti, from an aqueous solution of salts of such transition metals or of Al or of Mg, wherein such process is carried out in a stirred vessel and comprises the step of introducing an aqueous solution of alkali metal hydroxide and an aqueous solution of transition metal salts through at least two inlets into said stirred vessel wherein the distance of the locations of introduction of salts of TM and of alkali metal hydroxide is equal or less than 6 times the hydraulic diameter of the tip of the inlet pipe of the alkali metal hydroxide.
Abstract:
Spherical particles comprising a lithiated mixed transition metal oxide comprising nickel, cobalt and manganese and optionally at least one further transition metal, each in cationic form, wherein the carbonate content, calculated as Li2CO3, is in the range from 0.01 to 0.3% by weight, based on overall particles, and the proportion of nickel, plotted against the radius of the particles in question, in the outer region of the particles is at least 10 mol % below the proportion in the core, and the manganese content, plotted against the radius of the particles in question, in the outer region of the particles is at least 10 mol % above the proportion in the core, and where mol % are based on the total transition metal content.
Abstract translation:包含镍,钴和锰的锂化混合过渡金属氧化物和任选至少一种阳离子形式的另外的过渡金属的球形颗粒,其中以Li 2 CO 3计算的碳酸盐含量为0.01至0.3重量% 基于总体颗粒,并且在颗粒的外部区域中相对于所述颗粒的半径绘制的镍的比例比芯中的比例低至少10摩尔%,并且锰含量相对于半径 的颗粒的外部区域比核心中的比例高至少10摩尔%,其中摩尔%基于总过渡金属含量。
Abstract:
Process for producing a suspension by precipitation of a solid from a solution, wherein at least two solutions of salts are combined with one another in a stirred vessel so as to form a sparingly soluble solid, where portions of suspension are taken off continuously or discontinuously, the portions taken off in this way are processed in a combination of two separation apparatuses, where gas is separated off in a first separation apparatus which is selected from liquid-gaseous separation apparatuses, and mother liquor is separated off from precipitated sparingly soluble solid in a second separation apparatus selected from solid-liquid separation apparatuses, and the mother liquor is taken off, and the solid which has been separated off or enriched in this way is returned to the reaction mixture.
Abstract:
A process for preparing transition metal carbonates with a mean particle diameter in the range from 6 to 19 μm (D50), which comprises combining, in a stirred vessel, at least one solution of at least one transition metal salt with at least one solution of at least one alkali metal carbonate or alkali metal hydrogencarbonate to prepare an aqueous suspension of transition metal carbonate, and, in at least one further compartment, continuously introducing a mechanical power in the range from 50 to 10 000 W/l in a proportion of the suspension in each case, based on the proportion of the suspension, and then recycling the proportion into the stirred vessel.
Abstract:
The present invention is directed towards a process for making a particulate material according to the general formula (I): NiaCObMncMd(O)x(OH)y, wherein M is selected from Al and Ti, x is in the range of from 0.01 to 0.9, y is in the range of from 1.1 to 1.99, a is in the range of from 0.3 to 0.85, b is in the range of from 0.05 to 0.4, c is in the range of from 0.1 to 0.5, d is in the range of from 0.001 to 0.03, with a+b+c+d=1 said process comprising the following steps: (a) providing an aqueous slurry of particles of aluminum hydroxide or titanium dioxide, (b) adding an aqueous solution of water-soluble salts of nickel, cobalt and manganese and a solution of alkali metal hydroxide to the slurry according to step (a), thereby co-precipitating a layer of a mixed hydroxide of nickel and cobalt and manganese hydroxide on the particles according to step (a), (c) removing particles of (NiaCObMncAld)(OH)2+d or (NiaCObMncTid)(OH)2+2d so obtained and drying them in the presence of oxygen.
Abstract:
The present invention is directed towards a process for making a lithiated transition metal oxide, said process comprising the following steps: (a) providing a precursor selected from mixed oxides, hydroxides, oxyhydroxides, and carbonates of nickel and at least one transition metal selected from manganese and cobalt, wherein at least 45 mole-% of the cations of the precursor are Ni cations, (b) mixing said precursor with at least one lithium salt selected from LiOH, Li2O, Li2CO3, and LiNO3, thereby obtaining a mixture, (c) adding at least one phosphorus compound of general formula (I) XyH3−yPO4 (I) wherein X is selected from NH4 and Li, y is 1 or 2, to the mixture obtained in step (b), wherein steps (b) and (c) may be performed consecutively or simultaneously, treating the mixture so obtained at a temperature in the range of from 650 to 950° C.