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.
Abstract translation:本发明涉及一种制备锂化过渡金属氧化物的方法,所述方法包括以下步骤:(a)提供选自镍的混合氧化物,氢氧化物,羟基氧化物和碳酸盐以及至少一种选自 锰和钴,其中前体的阳离子的至少45摩尔%为Ni阳离子,(b)将所述前体与选自LiOH,Li 2 O,Li 2 CO 3和LiNO 3中的至少一种锂盐混合,由此获得混合物,( c)向步骤(b)中获得的混合物中加入至少一种通式(I)X y H 3-y PO 4(I)的磷化合物,其中X选自NH 4和Li,y为1或2,其中步骤(b) 和(c)可以连续或同时进行,在650-950℃的温度下处理如此得到的混合物。
Abstract:
Electrochemical cells containing (A) at least one cathode which has at least one lithiated Mn-containing compound which has an Mn content of from 60 to 80 mol%, based on transition metal present in the cathode (A), (B) at least one anode which comprises carbon in an electrically conductive modification, (C) at least one electrolyte which contains a) at least one aprotic organic solvent, (b) at least one lithium salt and (c) at least one organic compound which has at least one Si-N single bond per molecule.
Abstract:
The invention relates to a method for producing an aqueous cobalt sulphate solution having a pH value of at least 4, characterised in that (a) metallic cobalt dissolves in aqueous sulfuric acid in an atmosphere which is low in oxygen, hydrogen or inert gas, and (b) the thus produced acidic cobalt sulphate solution is treated with oxygen, oxygen-containing gas or a substance which can eliminate the oxygen in an aqueous medium.
Abstract:
The invention relates to a method for producing transition metal carbonates having an average particle diameter in the range from 6 to 19 µm (D50), characterized in that at least one solution of at least one transition metal salt is combined with at least one solution of at least one alkali metal carbonate or alkali metal hydrogen carbonate in a stirring vessel, whereby an aqueous suspension of transition metal carbonate is produced. The invention is also characterized in that, in at least one further compartment, a mechanical power in the range from 50 to 10000 W/I is continuously applied to a fraction of the suspension, with respect to the fraction of the suspension, and that the fraction is subsequently fed back into the stirring vessel.
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:
The invention relates to a method for producing electrode materials, characterized in that the components (A) at least one iron compound in which Fe is present in the oxidation state of +2 or +3, (B) at least one phosphorous compound, (C) at least one lithium compound, (D) at least one carbon source that can be a separate carbon source or the same at least one iron compound (A) or phosphorous compound (B) or lithium compound (C), (E) optionally at least one reducing agent, (F) optionally at least one other metal compound that has a metal that is different from iron, and (G) optionally water or at least one organic solvent are (a) mixed together, (b) spray dried together using at least one device that uses at least one spray nozzle for spraying, and (c) thermally treated at temperatures ranging from 350 to 1200 °C.