阅读说明：本技术 涂覆氧化物材料的方法 (Method for coating oxide material ) 是由 M·阿尔夫 H·佐默 R·福格尔桑 J·哈格 M·格罗纳 C·甘普 R·霍尔 J·斯宾 于 2019-08-30 设计创作，主要内容包括：本发明涉及一种涂覆氧化物材料的方法,所述方法包括以下步骤：(a)提供选自锂化镍钴铝氧化物、锂化钴锰氧化物和锂化层状镍钴锰氧化物的颗粒材料,(b)用金属醇盐或金属卤化物或金属氯化物或金属氨基化物或烷基金属化合物处理所述阴极活性材料,(c)用含有HF的气体处理步骤(b)中获得的材料,和任选地,重复步骤(b)和(c)的序列,其中步骤(b)和(c)在将混合能机械地引入颗粒材料中的混合器中进行,或者借助移动床或固定床进行,其中步骤(b)和(c)在比环境压力高5毫巴至1巴的压力下进行。(The invention relates to a method for coating an oxide material, comprising the following steps: (a) providing a particulate material selected from the group consisting of lithiated nickel cobalt aluminum oxides, lithiated cobalt manganese oxides and lithiated layered nickel cobalt manganese oxides, (b) treating the cathode active material with a metal alkoxide or metal halide or metal chloride or metal amide or alkyl metal compound, (c) treating the material obtained in step (b) with a HF-containing gas, and optionally repeating the sequence of steps (b) and (c), wherein steps (b) and (c) are carried out in a mixer in which mixing energy is mechanically introduced into the particulate material, or by means of a moving or fixed bed, wherein steps (b) and (c) are carried out at a pressure of from 5 mbar to 1 bar above ambient pressure.)

1. A method of preparing a coated oxide material, the method comprising the steps of:

(a) providing a particulate material selected from the group consisting of lithiated nickel cobalt aluminum oxides, lithiated cobalt manganese oxides, and lithiated layered nickel cobalt manganese oxides,

(b) treating the cathode active material with a metal alkoxide or metal amide or metal hydride or metal chloride or metal alkyl compound,

(c) treating the material obtained in step (b) with a gas comprising HF,

and optionally, repeating the sequence of steps (b) and (c),

wherein step (b) is carried out in a mixer in which mixing energy is introduced mechanically into the particulate material, or by means of a moving or fixed bed, and

wherein steps (b) and (c) are carried out at a pressure of from 5 mbar to 1 bar above ambient pressure.

2. The process according to claim 1, wherein the mixer is selected from the group consisting of a forced mixer and a free-fall mixer.

3. The process according to claim 1 or 2, wherein step (c) is carried out in an atmosphere free of carbon dioxide.

4. A process according to any one of the preceding claims wherein the metal alkyl compound or metal alkoxide or metal amide or metal hydride or metal halide is independently selected from M¹(R¹)₂、M²(R¹)₃、M³(R¹)_4-yH_y、M¹(OR²)₂、M²(OR²)₃、M³(OR²)₄、M³[N(R²)₂]₄、M¹(R¹)X、M²(R¹)₂X、M²R¹X₂、M³(R¹)₃X、M³(R¹)₂X₂、M³R¹X₃、M²H₃、M³H₄、(M³)₂H₆、M²Cl₃、M³Cl₄、M³ ₂X₆And M¹Or M²Or M³A combination with a counter ion, and methylalumoxane, wherein:

R¹different or the same and selected from hydrogen and linear or branched C₁-C₈An alkyl group, a carboxyl group,

r2 are different or identical and are selected from linear or branched C₁-C₄An alkyl group, a carboxyl group,

M¹is selected from the group consisting of Mg and Zn,

M²is selected from the group consisting of Al and B,

M³selected from Si, Sn, Ti, Zr and Hf,

x is a halide ion selected from the group consisting of chloride, bromide and iodide,

the variable y is selected from 0 to 4.

5. A method according to any one of the preceding claims, wherein the lithiated layered nickel cobalt manganese oxide is a material of general formula (I):

Li_(1+x)[Ni_aCo_bMn_cM⁴ _d]_(1-x)O₂ (I)

wherein:

M⁴selected from Mg, Ca, Ba, Al, Ti, Zr, Zn, Mo, Nb, V and Fe,

0≤x≤0.2，

0.1≤a≤0.95，

0≤b≤0.5，

0.1≤c≤0.6，

d is 0. ltoreq. d.ltoreq.0.1, and

a+b+c+d＝1。

6. the process according to any one of the preceding claims, wherein steps (b) and (c) are carried out in a rotating vessel with baffles.

7. The method according to any one of the preceding claims, wherein the exhaust gas is treated with water at a pressure above ambient pressure.

8. A method according to claim 7, wherein the exhaust gas is treated with water at a pressure of from 5 mbar to 1 bar above ambient pressure.

9. The process according to any one of the preceding claims, wherein step (b) is carried out at a pressure of from 5 mbar to 350 mbar above ambient pressure.

10. A process according to any one of the preceding claims wherein the particles of lithiated nickel cobalt aluminum oxide or lithiated layered nickel cobalt manganese oxide, respectively, are bonded.

11. A process according to any one of the preceding claims wherein step (b) is carried out at a temperature of from 15 to 350 ℃.

12. The process according to any one of the preceding claims, wherein the reactor in which step (b) is carried out is flushed with an inert gas between steps (b) and (c).

13. A method according to any one of the preceding claims, comprising the step of removing coating material by pneumatic convection from the reactors in which steps (b and (c) are respectively carried out.