A method for preparing nickel-cobalt-manganese ternary cathode material precursor with manganese nodules

A cathode material, a technology of manganese nodules, applied in the field of nickel-cobalt-manganese ternary cathode material preparation, to achieve the effect of reducing environmental pollution, completely separating, and breaking through resource bottlenecks

Active Publication Date: 2020-08-18
ZHUJI PAWA NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the method for preparing the precursor of nickel-cobalt-manganese ternary cathode material from manganese nodules has not been reported yet.

Method used

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  • A method for preparing nickel-cobalt-manganese ternary cathode material precursor with manganese nodules
  • A method for preparing nickel-cobalt-manganese ternary cathode material precursor with manganese nodules
  • A method for preparing nickel-cobalt-manganese ternary cathode material precursor with manganese nodules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] This embodiment includes the following steps:

[0068] 1.1 Take 1kg of manganese nodules, crush them to -60 mesh, dry them to a moisture content of 5.1wt%, mix the crushed and dried manganese nodules, coke, quartz, and quicklime to obtain a mixed material; , of which coke accounts for 10%, quartz accounts for 3%, quicklime accounts for 4%, and manganese nodules after crushing and drying account for 83%; CaO in quicklime / SiO in quartz 2 Mass ratio<1.5;

[0069] 1.2 The mixed material obtained in step (1) was reduced and smelted at 1300°C for 30 minutes to obtain molten alloys of nickel, cobalt, manganese, iron, and copper (a small amount), and the slag was discarded; the alloy yield was 10.86%, and the raw material Manganese nodules and the alloy composition obtained in this step are (wt%):

[0070]

[0071] 1.3 Add the molten alloy of nickel, cobalt, manganese, iron and copper obtained in step (2) into the atomization powder making device, and spray powder with hig...

Embodiment 2

[0091] This embodiment includes the following steps:

[0092] 2.1 Take 1kg of manganese nodules, crush them to -60 mesh, dry them to a moisture content of 9.8wt%, mix the crushed and dried manganese nodules, coke, quartz, and quicklime to obtain a mixed material; in the mixed material, by mass percentage, Among them, coke accounts for 8%, quartz accounts for 5%, quicklime accounts for 6%, and the rest is broken and dried manganese nodules, CaO in quicklime / SiO in quartz 2 Mass ratio<1.5;

[0093] 2.2 The mixed material obtained in step (1) was reduced and smelted at 1400°C for 90 minutes to obtain alloys of nickel, cobalt, manganese, iron, and copper (a small amount) in molten state, and the slag was discarded; the yield of the alloy was 11.24%, and the manganese The composition of the nodules and the resulting alloy is (wt%):

[0094]

[0095] 2.3 Add the molten alloy of nickel, cobalt, manganese, iron and copper obtained in step (2) into the atomization powder making de...

Embodiment 3

[0115] This embodiment includes the following steps:

[0116] 3.1 Take 1kg of manganese nodules, crush them to -80 mesh, dry them to a moisture content of 9.8wt%, mix the crushed and dried manganese nodules, coke, quartz, and quicklime to obtain a mixed material; in the mixed material, by mass percentage, Among them, coke accounts for 8%, quartz accounts for 5%, quicklime accounts for 6%, and the rest is broken and dried manganese nodules; CaO in quicklime / SiO in quartz 2 Mass ratio<1.5;

[0117] 3.2 The mixed material obtained in step (1) was reduced and smelted at 1600°C for 120 minutes to obtain molten alloys of nickel, cobalt, manganese, iron, and copper (a small amount), and the slag was discarded; the alloy yield was 11.56%, and the manganese The composition of nodules and the resulting alloy is (%):

[0118]

[0119] 3.3 Add the molten alloy of nickel, cobalt, manganese, iron and copper obtained in step (2) into the atomization powder making device, and spray powde...

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Abstract

The invention provides a method for preparing a nickel-cobalt-manganese ternary positive electrode material precursor by using manganese nodules. The method comprises the following steps: drying and crushing the manganese nodules, uniformly mixing the crushed manganese nodules with a reducing agent and a slag forming agent, and performing reducing and smelting to obtain a cobalt-nickel-copper-ironmolten alloy and slags; performing spray milling, enhanced leaching and solid-liquid separation on the molten alloy to obtain rust slags and a mixed solution of cobalt-nickel-copper-manganese; performing deep purification and impurity removal on the cobalt-nickel-copper-manganese mixed leach liquor to obtain a deeply purified cobalt-nickel-manganese mixed sulfuric acid solution; and finally deploying the molar ratio of cobalt, nickel and manganese in the cobalt-nickel-manganese mixed sulfuric acid solution according to target demands, throwing the cobalt-nickel-manganese mixed sulfuric acid solution into a reaction kettle together with sodium hydroxide and ammonia water, performing a synthetic reaction in a nitrogen protective atmosphere, and preforming ageing, filtering, washing and drying to obtain the nickel-cobalt-manganese ternary positive electrode material precursor. According to the method provided by the invention, the nickel-cobalt-manganese ternary positive electrode material precursor is directly prepared from the source of manganese nodules, and the purposes of maximizing the utilization rate of mineral resources, minimizing the energy consumption and minimizing the environmental burden are achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nickel-cobalt-manganese ternary positive electrode materials, and in particular relates to a method for preparing a nickel-cobalt-manganese ternary positive electrode material precursor with manganese nodules. Background technique [0002] Nickel-cobalt-manganese ternary cathode material has the advantages of high specific capacity, stable cycle performance, and good safety performance. It has a very broad application prospect in lithium-ion power batteries. It is a product very close to lithium cobalt oxide, and its cost performance is far It is higher than lithium cobalt oxide, and its capacity is 10-20% higher than that of lithium cobalt oxide. It is one of the most likely new battery materials to replace lithium cobalt oxide. It is called the third-generation lithium-ion battery cathode material. The domestic demand for cathode materials exceeds The annual growth rate of 20% gradually d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525C01G53/00
CPCY02E60/10
Inventor 彭春丽赵早文
Owner ZHUJI PAWA NEW ENERGY
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