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Method for preparing positive electrode ternary precursor powder

A precursor and positive electrode technology, which is applied in the field of preparing positive electrode ternary precursor powder, can solve the problems that the ternary precursor method needs to be improved, and achieve the effect of short process, avoiding extraction process and simple operation

Active Publication Date: 2020-03-03
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

[0003] Therefore, the method of synthesizing ternary precursors needs to be improved

Method used

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  • Method for preparing positive electrode ternary precursor powder

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Embodiment 1

[0054] Utilize the method of the embodiment of the present invention, use nickel-cobalt hydroxide filter cake as raw material to prepare the pre-solution, wherein, the composition of nickel-cobalt hydroxide filter cake is shown in Table 1, concrete steps are as follows:

[0055] element Ni co Fe mn Cu Zn content% 37.0 3.48 0.351 5.46 0.077 0.679 element Cr sc Ca Mg Al SiO 2

content% 0.227 0.0408 0.344 1.20 0.42 0.456

[0056] (1) Utilize 98% concentrated sulfuric acid to carry out acid-dissolving treatment to the nickel-cobalt hydroxide filter cake, the reaction temperature is 50 degrees centigrade, and the reaction time is 1 hour to obtain the solution after acid-dissolving, and the pH value of the solution after the acid-dissolving is 1.5;

[0057] (2) under stirring conditions, add sodium hydroxide to the solution after acid dissolution, adjust the pH value of the solution to 4.5, leave the solution after th...

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Abstract

A method for preparing positive electrode ternary precursor powder. The positive electrode ternary precursor powder contains three elements, i.e., nickel, cobalt and manganese. The method comprises: carrying out acid dissolution on nickel cobalt hydroxide so as to obtain a solution after acid solving; carrying out impurity removal treatment on the solution after acid solving so as to obtain a solution after impurity removal; adjusting the proportions of nickel, cobalt, and manganese in the solution after impurity removal so as to obtain a former solution; and using the former solution to prepare the positive electrode ternary precursor powder.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing positive electrode ternary precursor powder. Background technique [0002] In the existing process, refined nickel salts, cobalt salts and manganese salts are usually used to synthesize ternary precursors, but each refined salt has problems such as long production process, high investment, harsh operation requirements and high operating costs. [0003] Therefore, the method for synthesizing ternary precursors needs to be improved. Contents of the invention [0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the present invention is to propose a kind of method for preparing positive electrode ternary precursor powder, after this method is by acidifying nickel hydroxide cobalt to remove impurity, adjust the nickel, cobalt, manganese three kinds of elements in the solut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 傅建国李少龙陆业大刘国彭建华丁淑荣殷书岩张阳
Owner CHINA ENFI ENGINEERING CORPORATION
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