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Method for preparing single-crystal ternary particles by utilizing ternary material micro powder

A ternary material and micropowder technology, applied in the direction of single crystal growth, single crystal growth, polycrystalline material growth, etc., can solve the problems of ternary micropowder particle size is small, can not be used, high magnetic, etc., to promote particle growth, Effect of reducing waste and lowering reaction temperature

Pending Publication Date: 2022-03-25
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the defects existing in the prior art, combined with the current research frontier, the present invention provides a method for preparing single-crystal ternary particles by using ternary material micropowder, which solves the problem that the existing by-product ternary micropowder has too small particle size and residual alkali Problems such as high and high magnetic properties cannot be utilized, resulting in waste.

Method used

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  • Method for preparing single-crystal ternary particles by utilizing ternary material micro powder
  • Method for preparing single-crystal ternary particles by utilizing ternary material micro powder
  • Method for preparing single-crystal ternary particles by utilizing ternary material micro powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] First, 100 parts by weight of ternary micropowder is put into a water-washing tank equipped with 150 parts by weight of pure water, stirred for 1 hour, and the mixed slurry after stirring is transported through two series-connected permanent magnet iron removers through two series-connected permanent magnet iron removers for iron removal. After ironing, the slurry is input into the pressure filter tank, followed by pressure filtration and drying, and then 100 parts by weight of the dried ternary micropowder, 0.13 parts by weight of the additive strontium oxide and 0.07 parts by weight of the sintering aid diboron trioxide Put it into a high-mixer and mix evenly, transfer the high-mixture of ternary micropowder, additives and sintering aids to an electric kiln for calcination. The calcination temperature is 920°C. After 10 hours of calcination, the ternary micropowder grains can be realized. grow to obtain single crystal ternary particles.

Embodiment 2

[0032] First, 100 parts by weight of ternary micropowder is put into a water-washing tank equipped with 150 parts by weight of pure water, stirred for 1 hour, and the mixed slurry after stirring is transported through two series-connected permanent magnet iron removers through two series-connected permanent magnet iron removers for iron removal. The slurry after ironing is input into the pressure filter tank, followed by pressure filtration and drying, and then 100 parts by weight of the dried ternary micropowder, 0.5 parts by weight of the additive strontium hydroxide and 0.02 parts by weight of the sintering aid boron carbonate are put into the Mix evenly in the high-mixer, transfer the high-mixture of ternary micropowder, additives and sintering aids to the electric kiln for calcination, the calcination temperature is 950°C, and after 12 hours of calcination, the grain growth of ternary micropowder can be realized , to obtain single crystal ternary particles.

Embodiment 3

[0034] First, 100 parts by weight of ternary micropowder is put into a water-washing tank equipped with 150 parts by weight of pure water, stirred for 1 hour, and the mixed slurry after stirring is transported through two series-connected permanent magnet iron removers through two series-connected permanent magnet iron removers for iron removal. The slurry after ironing is input into the pressure filter tank, followed by pressure filtration and drying, and then 100 parts by weight of the dried ternary micropowder, 0.1 part by weight of the additive strontium nitrate and 0.05 part by weight of the sintering aid boric acid are put into the high-mixing Mix evenly in the machine, transfer the high mixture of ternary micropowder, additives and sintering aids to the electric kiln for calcination, the calcination temperature is 930°C, after 10 hours of calcination, the grain growth of ternary micropowder can be achieved, and obtained Single crystal ternary particles.

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Abstract

The invention belongs to the technical field of lithium ion battery positive electrode material preparation, and particularly relates to a method for preparing single-crystal ternary particles by using ternary material micro powder. The preparation method specifically comprises the following steps: 1) iron removal: washing ternary micro powder with the particle size of 0.5-1.5 mu m with water according to a water-material mass ratio of (1.5-1.4): 1, stirring, removing iron from the stirred mixed slurry through a permanent magnet iron remover, and then carrying out filter pressing and drying; 2) mixing: uniformly mixing the dried ternary micro-powder obtained in the step 1) with an additive containing a strontium element and a sintering aid containing a boron element according to a weight ratio of the ternary micro-powder to the additive to the sintering aid of 100: (0.08-0.15): (0.03-0.07); and 3) calcining: calcining the mixture of the ternary micro powder obtained in the step 2), the additive and the sintering aid at the temperature of 900-950 DEG C for 8-12 hours. According to the preparation process, the ternary micro powder is prepared into the high-voltage single crystal to be recycled, so that the waste is reduced, and the cost is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of preparation of cathode materials for lithium ion batteries, and specifically uses ternary material micropowder to prepare single crystal ternary particles. Background technique [0002] Ternary material is a kind of positive electrode material of lithium ion battery. It is made of nickel salt, cobalt salt and manganese salt. The ratio of nickel, cobalt and manganese can be adjusted according to actual needs. During the production process of the ternary material, the ternary material hardens severely after sintering, and it is necessary to use a jet mill or mechanical classification equipment to disperse the bonded particles. This process will produce more fine particles of ternary materials, that is, the by-product micropowder. The particle size of these micropowders is small, the structure is incomplete, and the residual alkali is high, and the impurity elements and magnetic substances are also much hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B28/02H01M4/505H01M4/525H01M10/0525
CPCC30B29/52C30B28/02H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 孙琦张姝尹元王赛赛
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL