Preparation device and method for ternary material precursor

A technology of ternary materials and precursors, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., to achieve the effects of good sphericity, strong process controllability, and spheroidized particle shape

Active Publication Date: 2018-08-24
SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] That is to say, in the prior art, there are still the following technical problems to be solved in the traditional kettle-type co-precipitation reaction to prepare the ternary material precursor: to make the materials fully and quickly and uniformly mix and react, and to accurately control the temperature and pH For good performance and consistent product granules

Method used

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  • Preparation device and method for ternary material precursor
  • Preparation device and method for ternary material precursor
  • Preparation device and method for ternary material precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, this embodiment provides a preparation equipment for a ternary material precursor, including a jet tube reactor 1, an ultrasonic aging tank 2, a first tympanic plate-and-frame filter press 3, and a pre-drying equipment connected sequentially through pipelines 4. Wet stirring ball mill 5, second tympanic plate and frame filter press 6, beater 7, material delivery pump 8 and spray drying tower 9, jet tube reactor 1 is connected with mixed salt solution storage tank 10 and coprecipitation Agent storage tank 11.

[0036] Wherein, a first constant flow pump 12 is provided between the jet tube reactor 1 and the mixed salt solution storage tank 10 , and a second constant flow pump 13 is provided between the jet tube reactor 1 and the coprecipitant storage tank 11 .

[0037] The jet tube reactor 1 is provided with a helical channel 14 , and the materials are impacted and mixed in the jet tube reactor 1 , and undergo time-delay reaction in the helical...

Embodiment 2

[0049] Different from Example 1 is the preparation method of the ternary material, the method at least includes the following steps:

[0050] In the first step, nickel nitrate, cobalt acetate, and manganese oxalate are added to the mixed solvent of ethanol and water (the volume ratio of the two is 1:1) according to the molar ratio of 8:1:1 and mixed evenly to obtain a mixed solution of 3mol / L. Salt solution, add the mixed salt solution into the mixed salt solution storage tank 10; mix 3mol / L NaOH and 3mol / L ammonia water in a volume ratio of 2:1 to obtain coprecipitant solution, add coprecipitant storage tank 11 middle;

[0051] In the second step, the solution in the mixed salt solution storage tank 10 and the co-precipitant storage tank 11 is heated to 52 ° C, and through the precise metering of the first constant flow pump 12 and the second constant flow pump 13, a constant feed ratio is supplied to the Feeding in the jet tube reactor 1, so that the pH value of the mixed s...

Embodiment 3

[0057] Different from Example 1 is the preparation method of the ternary material, the method at least includes the following steps:

[0058] In the first step, nickel acetate, cobalt nitrate, and aluminum nitrate are added to a mixed solvent of acetone and water (the volume ratio of the two is 1:1) according to the molar ratio of 7:2:1 and mixed evenly to obtain 2.5mol / L Mix the salt solution, add the mixed salt solution into the mixed salt solution storage tank 10; mix 2.5mol / L NaOH and 2.5mol / L ammonia water at a volume ratio of 2:1 to obtain a coprecipitant solution, add the coprecipitant In storage tank 11;

[0059] In the second step, the solution in the mixed salt solution storage tank 10 and the co-precipitant storage tank 11 is heated to 58 ° C, and the precise metering of the first constant flow pump 12 and the second constant flow pump 13 is carried out with a constant feed ratio. Feeding in the jet tube reactor 1, so that the pH value of the mixed slurry is 11;

...

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Abstract

The invention belongs to the technical field of positive electrode materials of lithium ion batteries, and particularly relates to a preparation device for a ternary material precursor. The device comprises a jetting type tubular reactor, an ultrasonic ageing tank, a first bulging membrane type plate-and-frame filter press, a pre-drying device, a wet stirring ball milling machine, a second bulgingmembrane type plate-and-frame filter press, a pulping machine, a material conveying pump and a spraying drying tower which are sequentially connected through pipelines, wherein the jetting tubular reactor is connected to a mixed salt solution storing tank and a co-precipitation agent storing tank. Compared with the prior art, the device has the advantages that the controllability of the co-precipitation reaction can be improved; the preparation period can be reduced; massive continuous preparation is achieved; and the actual application in industrial preparation of the ternary material is ensured; in addition, the scale parameters of nickel, cobalt and manganese are adjusted to obtain the ternary precursors with different types so as to meet different application demands. The invention also discloses a method for preparing the ternary material precursor through the abovementioned device.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, and in particular relates to a preparation device and a preparation method of a ternary material precursor. Background technique [0002] Lithium-ion batteries are widely used in electronic communication equipment, electric vehicles and other fields. With the continuous development of technology, people have higher and higher requirements on the energy density and stability of lithium-ion batteries. As an important part of the lithium-ion battery, the performance of the cathode material directly determines the performance of the lithium-ion battery, and its cost also directly affects the price of the lithium-ion battery. Common commercial lithium-ion battery cathode materials include lithium cobaltate, lithium manganate, ternary materials (NCM, NCA) and lithium iron phosphate. Among them, the ternary material takes into account the advantages of the three materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
CPCC01G53/006C01P2002/72C01P2004/03Y02E60/10
Inventor 魏春光梁燕静霞李立良
Owner SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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