Ternary precursor preparation system

Abstract

The invention discloses a ternary precursor preparation system which comprises a blending system, a synthesis control system, an aging system, a washing filter pressing system and a drying system, wherein the blending system comprises a mixed salt preparing kettle and an additive solution preparation tank; the synthesis control system comprises a reaction kettle, an alkali storage tank and an ammonium hydroxide storage tank; the reaction kettle communicates with the mixed salt preparation kettle; the alkali storage tank communicates with the reaction kettle through the ammonium hydroxide storage tank; the aging system comprises an aging kettle; the aging kettle communicates with the reaction kettle and the additive solution preparation tank respectively; the aging kettle is internally provided with a stirring device; the aging kettle is further provided with a jacket; the washing filter pressing system comprises a filter press and a mother liquid transfer tank; the aging kettle communicates with the sealed filter press and the mother liquid transfer tank respectively; and the drying system comprises a hot air circulation baking oven for drying a washed and filtered product. By adopting the system, precursor granules which are dense in granule, good in sphericity and narrow in particle size distribution can be prepared.

Description

technical field [0001] The invention relates to the technical field of hydrogen production devices, in particular to a ternary precursor preparation system. Background technique [0002] The key material of lithium-ion batteries is the positive electrode material, which accounts for about 30% of the cost of lithium-ion batteries. At present, lithium cobalt oxide, ternary materials, lithium manganese oxide, and lithium iron phosphate are mainly used in the market. Among them, the ternary material, that is, nickel-cobalt lithium manganese oxide material, is a new type of lithium battery cathode material; compared with other cathode materials, it has the advantages of high mass specific capacity, low cost, good thermal stability, and high energy density. It is widely used in digital electronic products, electric tools, electric bicycles and other fields. The preparation of ternary materials is mainly prepared by mixing the ternary precursor with lithium source and then sinteri...

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Problems solved by technology

[0003] At present, the nickel-cobalt-manganese hydroxide ternary precursor is usually prepared by crystal co-precipitation method. However, since the nickel-cobalt-manganese hydroxide generated during the preparation process is easily oxidized when exposed to air, the entire reaction vessel needs to be kept sealed. State, for the sake of production safety, in the existing reaction process, the concentration of nickel-cobalt-manganese salt solution and sodium hydroxide in the reactor should not be too high, so it often occurs that the prepared crystal particles are too fine or too large, and some crystals develop Problems such as immaturity and loose particle surface structure, which in turn lead to serious waste of production materials

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