A dynamic repair method for ball-cracked high-nickel ternary precursors
A dynamic repair and precursor technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve problems such as product performance degradation, high-nickel ternary precursor ball cracking, etc., to reduce collision strength and prevent further cracking , beneficial to the effect of growth
Active Publication Date: 2022-08-09
南通金通储能动力新材料有限公司
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Problems solved by technology
However, when the high-nickel ternary precursor is prepared by the co-precipitation method, ball cracking is prone to occur, resulting in a decrease in product performance
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[0043] Example: The following will clearly illustrate this case with drawings and detailed descriptions. Any person skilled in the art can change and modify the technology taught in this case after understanding the embodiments of this case, which does not deviate from the spirit of this case. with scope.
[0044] The language used herein is intended to describe particular embodiments and is not intended to be limiting. The singular forms such as "a", "the", "the", "this" and "the", as used herein, also include the plural forms.
[0045]Regarding the terms (terms) used in this article, unless otherwise specified, they usually have the ordinary meaning of each term used in this field, in the content of this case and in the special content. Certain terms used to describe the present case are discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance regarding the description of the present case.
[0046] Embodiment: a method...
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Abstract
A dynamic repair method for a ball-cracked high-nickel ternary precursor, comprising: first, preparing a mixed solution of Ni, Co, Mn and repairing agent; preparing a precipitating agent; preparing a complexing agent; secondly, adding a repairing agent to a reaction kettle , the reaction temperature is adjusted to 70~80℃, the pH value is lowered by 0.20~0.25, and the ammonia concentration is raised by 0.10~0.15mol / L; 3. The mixed solution, precipitating agent and complexing agent are respectively added to the reaction at 50% of the original reaction flow rate. The kettle, the overflow liquid flows to the thickener, and the reaction is 6~10h; 4. After the repair is completed, the liquid feeding is suspended, and the original reaction temperature, original pH value, and original ammonia concentration are restored; 5. The original metal liquid, complexing agent and precipitation are restored. 6. Press filter, wash and dry the slurry to obtain a high-nickel ternary precursor with a complete surface. The invention has remarkable repairing effect, can realize dynamic repairing without stopping the machine, and solves the contradiction between high repairing efficiency and high repairing quality.
Description
technical field [0001] The invention relates to the technical field of positive electrode materials for lithium ion batteries, in particular to a dynamic repair method for a ball-cracked high-nickel ternary precursor. Background technique [0002] With the rapid growth of production and sales of new energy vehicles, the rapid development of upstream and downstream industry chains has been driven, especially the increasing demand for power batteries. The key component of the power battery is the cathode material. The high-nickel ternary cathode material has attracted the attention of battery manufacturers because of its high energy density and low cost. [0003] The high-nickel ternary cathode material is mainly obtained by mixing and calcining a high-nickel ternary precursor and a lithium source, and the precursor directly affects the electrical properties of the cathode material. In industry, the co-precipitation method is often used in the preparation of high-nickel terna...
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IPC IPC(8): C01G53/00
CPCC01G53/006C01P2004/04C01P2004/32Y02E60/10
Inventor 朱用袁超群李加闯褚凤辉李佰康黄帅杰王梁梁贺建军
Owner 南通金通储能动力新材料有限公司