Method for directly preparing nickel-cobalt-aluminum ternary cathode material precursor by using acid leaching solution of laterite nickel ore

A technology of laterite nickel ore and positive electrode materials, which is applied in the field of preparation of lithium battery positive electrode material precursors, and can solve the problems of low actual capacity of nickel-cobalt-manganese ternary positive electrode materials, low nickel substitution, and restrictions on wide application

Active Publication Date: 2018-01-12
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The substitution amount of nickel is low, resulting in low actual capacity of nickel-cobalt-manganese ternary cathode material;
[0005] (2) Nickel-rich nickel-cobalt-manganese ternary materials have poor stability and relatively low safety, which limits their wide application;
[0006] (3) Most of the current ternary materials are refined sulfates, nitrates, and chlorides. There are problems such as long process from the initial raw material to the product, large emissions, high cost, etc., which are not green and not conducive to environmental protection.
The disadvantage of this method is that refined sulfate is used as raw material, the process is long, the cost is high, and it is not conducive to environmental protection.

Method used

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  • Method for directly preparing nickel-cobalt-aluminum ternary cathode material precursor by using acid leaching solution of laterite nickel ore
  • Method for directly preparing nickel-cobalt-aluminum ternary cathode material precursor by using acid leaching solution of laterite nickel ore
  • Method for directly preparing nickel-cobalt-aluminum ternary cathode material precursor by using acid leaching solution of laterite nickel ore

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Effect test

Embodiment 1

[0113] This embodiment provides a method for preparing a nickel-cobalt-aluminum ternary positive electrode material precursor using the acid leaching solution of laterite nickel ore as a raw material. The specific preparation method is as follows:

[0114] A. Impurity removal and impurity separation: take 150m 3 For laterite nickel ore hydrochloric acid leaching solution, the content of each element is shown in the table below:

[0115]

[0116] ① Adding 330 kg of magnesia slurry with a mass fraction of 1% drop by drop, controlling the pH to 3.8, separating iron from solid and liquid, and taking the filtrate;

[0117] ②Then add 5wt.% NaOH and 212kg of 8wt% hydrogen peroxide to the above pickling solution, control pH=9.0, separate solid-liquid to take filter cake, add 5wt% dilute sulfuric acid 20m 3 , solid-liquid separation except Mn, Mg, get filtrate;

[0118] 3. add 5wt%NaOH solution in above-mentioned filtrate, control pH=10.5, filter and get filter cake, filter cake q...

Embodiment 2

[0131] This embodiment provides a method for preparing a nickel-cobalt-aluminum ternary positive electrode material precursor using the acid leaching solution of laterite nickel ore as a raw material. The specific preparation method is as follows:

[0132] A. Impurity removal and impurity separation: take 75m 3 For laterite nickel ore hydrochloric acid leaching solution, the content of each element is shown in the table below:

[0133]

[0134] ① Slowly add 248.5 kg of magnesium carbonate slurry with a mass fraction of 2%, control the pH within the range of 4.0, filter to remove iron, and take the filtrate;

[0135] ② Then add 5wt% NaOH and 159kg of 10wt% hydrogen peroxide to the above pickling solution, control the pH=9.5, filter to take the filter cake, add 10wt% dilute nitric acid 10m 3 , solid-liquid separation except Mn, Mg, get filtrate;

[0136] 3. add 5wt% NaOH solution in above-mentioned filtrate, control pH=11, filter and get filter cake, filter cake quality is ...

Embodiment 3

[0147] This embodiment provides a method for preparing a nickel-cobalt-aluminum ternary positive electrode material precursor using the acid leaching solution of laterite nickel ore as a raw material. The specific preparation method is as follows:

[0148] A. Impurity removal and impurity separation: take 50m 3 The content of each element in the laterite nickel ore hydrochloric acid leaching solution is as follows:

[0149]

[0150] 1. Add 101.5kg of magnesium hydroxide slurry with a mass fraction of 3% dropwise, control the pH within the range of 4.2, filter and remove iron, and get the filtrate;

[0151] ② Then add 5wt% NaOH and 89kg of 15wt% hydrogen peroxide to the above pickling solution, control the pH=10.0, filter to take the filter cake, add 5wt% dilute hydrochloric acid 5m 3 , solid-liquid separation except Mn, Mg, get filtrate;

[0152] 3. add 5wt% NaOH solution in above-mentioned filtrate, control pH=11.5, filter and get filter cake, filter cake quality is (dry...

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Abstract

The invention provides a method for directly preparing a nickel-cobalt-aluminum ternary cathode material precursor by using an acid leaching solution of laterite nickel ore. The method comprises the following steps: A, removing impurities and separating the impurities; B, preparing a mixed solution; C, preparing a sodium metaaluminate solution; D, preparing an alkaline solution as a precipitator;E, carrying out precipitation reaction and aging. According to the method for directly preparing the nickel-cobalt-aluminum ternary cathode material precursor, provided by the invention, the acid leaching solution of the laterite nickel ore is used as a raw material for directly preparing a product, so that the production flow is short and the production cost is low. The ternary precursor materialprepared by the method provided by the invention has the advantages of uniform particle size distribution, good stability, high specific capacity, high activity and relatively-high tap density.

Description

technical field [0001] The invention relates to a preparation method of a lithium battery cathode material precursor, in particular to a method for directly preparing a nickel-cobalt-aluminum ternary cathode material precursor from an acid leaching solution of laterite nickel ore. Background technique [0002] With many advantages such as high average working voltage, high energy density, long cycle life, small self-discharge, no memory effect, and adaptability to fast charging and discharging, lithium-ion secondary batteries have shined in the fields of transportation facilities, military equipment, and digital products. And it also has a broader application prospect in the field of power batteries such as electric bicycles and electric vehicles. [0003] The cathode material of lithium-ion secondary batteries is one of the main factors affecting its cost and performance. The traditional LiCoO 2 Due to the high cost, the positive electrode material is gradually replaced by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525H01M4/46
CPCY02E60/10
Inventor 曲景奎马飞魏广叶齐涛张绘孙亚娟
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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