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Device and method for manufacturing positive electrode active material precursor

A technology for positive electrode active materials and precursors, which is applied in the field of manufacturing positive electrode active material precursors, can solve the problems of residence time and reaction time deviation, reduced productivity, and uneven size and particle size of positive electrode active materials.

Pending Publication Date: 2021-04-16
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Generally, a cathode active material precursor manufactured using a continuous reactor (CSTR) can increase the productivity of the cathode active material precursor by introducing and co-precipitating raw materials while discharging the precursor, but because the raw material introduction and product discharge are carried out simultaneously and continuously Therefore, the residence time and reaction time of the cathode active material precursor manufactured in the reactor may deviate, and therefore, the size and particle size of the manufactured cathode active material are not uniform
[0010] In addition, the cathode active material precursor manufactured using a batch reactor has uniform particle size and granularity, but its productivity is reduced compared to that manufactured using a continuous reactor (CSTR)

Method used

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  • Device and method for manufacturing positive electrode active material precursor
  • Device and method for manufacturing positive electrode active material precursor
  • Device and method for manufacturing positive electrode active material precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Embodiment 1: the manufacture of cathode active material precursor

[0131] 1. Manufacture of equipment for the manufacture of cathode active material precursors

[0132] manufacture figure 1 and figure 2 The apparatus used to fabricate cathode active material precursors shown in .

[0133] Specifically, in a reactor having a volume of 70 L, four filter-type baffles including stainless steel filters with a pore diameter of 0.1 μm were installed at constant intervals on the outer wall of the reactor. The filter contained in the filter-type baffle consists of an upper filter and a lower filter that can operate independently. The length of the filter type baffle is 65% of the total height of the reactor, and the lower filter is set at 15% to 50% of the reactor height, and the upper filter is set at 50% to 85% of the reactor height at %. In addition, an additional filter made of metal (stainless steel) having a pore diameter of 5 μm was inserted into the reactor, and ...

Embodiment 2

[0140] Embodiment 2: the manufacture of cathode active material precursor

[0141] 1. Manufacture of equipment for the manufacture of cathode active material precursors

[0142] The apparatus for manufacturing a cathode active material precursor of Example 2 was manufactured in the same manner as in Example 1 except that no additional filter and additional reaction solution discharge line were installed in the manufacturing apparatus of Example 1.

[0143] 2. Fabrication of cathode active material precursors

[0144] NiSO 4 、CoSO 4 and MnSO 4 Nickel:cobalt:manganese was mixed in water in such an amount that the molar ratio of nickel:cobalt:manganese was 8:1:1 to prepare a transition metal-containing solution with a concentration of 2.4M.

[0145] Prepare the transition metal-containing solution, NaOH aqueous solution with a concentration of 25% by weight and NH with a concentration of 9% by weight 4 OH aqueous solution and introduce it into the reactor through the reactio...

experiment example 1

[0164] Experimental example 1: Evaluation of particle size distribution

[0165] In order to confirm the particle size distribution of the positive electrode active material precursor particles produced in Examples 1 and 2 and Comparative Examples 1 and 2, the S-3500 from Microtrac was used to measure the particles produced in Examples 1 and 2 and Comparative Examples 1 and 2. The particle size of the cathode active material precursor, and the results are shown in the following table 1 and image 3 middle.

[0166] [Table 1]

[0167] D. 5 (μm)

D. 50 (μm)

D. 95 (μm)

(D 95 -D 5 ) / D 50

Example 1 7.8 10.2 14.6 0.68 Example 2 8.1 10.9 15.8 0.70 Comparative example 1 8.2 10.7 15.0 0.63 Comparative example 2 5.0 10.2 20.1 1.48

[0168] Refer to Table 1 and image 3 , it was confirmed that the cathode active material precursor manufactured in the manufacturing apparatus of the example had a narrower parti...

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Abstract

The present invention provides a device for manufacturing a positive electrode active material precursor, the device comprising: a reactor into which a reaction solution is introduced; a stirrer which is inserted into the reactor and stirs the reaction solution; and a filter-type baffle which is inserted into the reactor and includes the filter.

Description

technical field [0001] Cross References to Related Applications [0002] This application is based on and claims priority from Korean Patent Application No. 10-2018-0134627 filed in the Korean Intellectual Property Office on November 5, 2018, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to an apparatus and method for manufacturing positive active material precursors. Background technique [0004] With the technological development and increase in demand of mobile devices, the demand for secondary batteries as energy sources is rapidly increasing. Among these secondary batteries, lithium secondary batteries having high energy density and voltage, long cycle life, and low self-discharge rate have been commercialized and widely used. [0005] As a positive electrode active material for lithium secondary batteries, lithium transition metal oxides are used, and among them, lithium cobalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01J19/00C01G53/00
CPCB01J19/18B01J19/006B01J2219/00186B01J2219/00768B01J2219/185B01J8/006B01J2208/00938Y02E60/10C01P2004/03C01G53/006C01P2004/51C01P2004/61C01P2004/54H01M4/525B01J2219/00033B01J2219/00423B01J2219/00763B01J19/0066B01J19/06B01J2219/00765C01G53/40C01P2006/40H01M4/0497H01M2004/028
Inventor 朴京浣金成培朴英洙
Owner LG CHEM LTD
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