An intelligent control reaction system and preparation method for preparing ternary material precursor

Abstract

The invention discloses an intelligent control reaction system and a preparation method for preparing a ternary material precursor. The intelligent control reaction system includes two parts: a metal ammonia complex concentration detection control system and a chemical co-precipitation reaction system. The metal ammonia complex concentration detection and control system consists of an automatic online sampling sub-system, a metal ammonia complex concentration detection subsystem, a metal ammonia complex concentration control subsystem and a controller; the chemical co-precipitation reaction system includes a reaction kettle, an automatic Feeding subsystem, temperature control subsystem, stirring subsystem, pH value detection and control subsystem, etc. The intelligent control reaction system regulates the reaction nucleation rate and crystal growth rate by controlling the concentration of the metal ammonium complex in the ternary material precursor reaction system, so as to achieve the purpose of effectively controlling the coprecipitation reaction rate. Using the ternary material synthesized by the present invention The precursor has the advantages of good sphericity, reasonable particle distribution, uniform distribution of components, good batch stability, etc., and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of ternary material precursors for lithium ion secondary batteries, and in particular relates to an intelligent control reaction system for preparing high-quality ternary material precursors and a method for preparing high-quality ternary material precursors. Background technique [0002] The development of electric vehicles is an important means to solve the energy crisis and environmental pollution, and it is also the main direction of the future development of the automobile industry. Among them, the development of power batteries with high specific energy, low cost, long life and high safety is the core of the electric vehicle industry and the development direction of industrial technology. Judging from the existing technology and its development history, lithium-ion batteries are still the primary power battery for electric vehicles at present and for a long time to come. [0003] As the most impo...

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Problems solved by technology

[0005] The methods for synthesizing ternary material precursors mainly include chemical co-precipitation method, sol-gel method, emulsion method, etc. Among them, the co-precipitation method has the advantages of simple process, strong applicability, and low requirements for equipment and technology. The spherical ternary material precursor is an ideal method, but due to the performance difference of transition metal ions, it is easy to cause uneven distribution of precursor components in the co-precipitation reaction, poor batch stability, large primary particle size, and secondary particle size. Defects such as wide particle size distribution and particle agglomeration

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