Method for synthesizing ternary precursor without inert gas protection

An inert gas, precursor technology

Active Publication Date: 2020-12-18
FOSHAN DYNANONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although Comparative Document 1 also uses the reaction between manganese sulfate, nickel sulfate, cobalt sulfate, sodium hydroxide, and ammonia water to prepare the precursor, it needs to be protected by nitrogen gas. The gas consumption of nitrogen gas is large and the utilization rate is low, resulting in production costs. High, cumbersome operation, resulting in difficult control of the reaction process and other problems

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  • Method for synthesizing ternary precursor without inert gas protection
  • Method for synthesizing ternary precursor without inert gas protection
  • Method for synthesizing ternary precursor without inert gas protection

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0054] 1. Weigh 300g of nickel sulfate, 200g of cobalt sulfate, and 50g of manganese sulfate and dissolve them in 1100g of water. After stirring evenly, a solution A with a solution concentration of 1.98mol / L is obtained.

[0055] 2. Weigh 200 g of 15% sodium hydroxide solution and 200 g of deionized water, and stir evenly to obtain solution B with a solution concentration of 3.75 mol / L.

[0056] 3. Weigh 120 g of concentrated ammonia water with a concentration of 25% and 200 g of deionized water to obtain solution C with a solution concentration of 4.28 mol / L.

[0057] 4. Weigh 300g, 400g, and 100g of the above solution A, solution B, and solution C respectively.

[0058] 5. Put solution A, solution B, and solution C into the closed reactor in parallel, and the reaction process does not need nitrogen protection. The stirring rate of the reactor was controlled at 600 rpm / min, the reaction temperature was kept at 50° C., the pH was kept at 9-10, and the reaction time was 40 h....

Embodiment 2

[0061] 1. Weigh 350g of nickel sulfate, 200g of cobalt sulfate, and 60g of manganese sulfate and dissolve them in 2000g of water. After stirring evenly, a solution A with a solution concentration of 1.22mol / L is obtained.

[0062] 2. Weigh 150 g and 200 g of 20% sodium hydroxide solution and 200 g of deionized water, and stir evenly to obtain solution B with a solution concentration of 3.75 mol / L.

[0063] 3. Weigh 120 g of concentrated ammonia water with a concentration of 24% and 200 g of deionized water to obtain solution C with a solution concentration of 4.11 mol / L.

[0064] 4. Weigh 300g, 450g and 100g of the above solution A, solution B and solution C respectively.

[0065] 5. Put solution A, solution B, and solution C into the closed reactor in parallel, and the reaction process does not need nitrogen protection. The stirring rate of the reactor was controlled at 700 rpm / min, the reaction temperature was kept at 60° C., the pH was kept at 9-11, and the reaction time w...

Embodiment 3

[0068] 1. Weigh 320g of nickel sulfate, 250g of cobalt sulfate, and 80g of manganese sulfate and dissolve them in 2000g of water. After stirring evenly, a solution A with a solution concentration of 1.32mol / L is obtained.

[0069] 2. Weigh 200 g of 20% sodium hydroxide solution and 200 g of deionized water, and stir evenly to obtain solution B with a concentration of 5 mol / L.

[0070] 3. Weigh 150 g of concentrated ammonia water with a concentration of 15% and 160 g of deionized water to obtain solution C with a solution concentration of 4.0 mol / L.

[0071] 4. Weigh 350g, 450g, and 150g of the above solution A, solution B, and solution C respectively.

[0072] 5. Put solution A, solution B, and solution C into the closed reactor in parallel, and the reaction process does not need nitrogen protection. The stirring rate of the reactor was controlled at 800 rpm / min, the reaction temperature was kept at 70° C., the pH was kept at 9-10, and the reaction time was 35 hours.

[0073...

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Abstract

The invention discloses a method for synthesizing a ternary precursor without inert gas protection. The method comprises the steps of (1) weighing nickel, cobalt and manganese sulfate and water and performing mixing based on a proportion of 1 to (2-8) to obtain a solution A; (2) weighing a sodium hydroxide solution with concentration of 10-35% and deionized water, and performing mixing based on aproportion of (1-3) to (1-3) to obtain a solution B; (3) weighing stronger ammonia water with concentration of 15-30% and deionized water, and performing mixing based on a proportion of (1-3) to (2-4)to obtain a solution C; and (4) enabling the solution A, the solution B and the solution C to be added into a sealed reaction kettle at a ratio of (2-4) to (3-5) to (0.1-2) to be stirred, without inert gas protection in the reaction process, and performing a reaction to obtain the ternary precursor. By adoption of the method, inert gas protection is not needed in the reaction process, the processcan be simplified, the reaction process is controlled easily, the operation is simple, and the cost is low.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for synthesizing a ternary precursor without inert gas protection. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, low self-discharge rate, and little environmental pollution. Single-crystal ternary materials are used to prepare Li-ion electrons. In the prior art, lithium carbonate is generally used as a lithium introduction source, and a single crystal ternary material is prepared by mixing and sintering lithium carbonate and a precursor. Specifically, the preparation method of the single crystal ternary material includes: (1) the preparation of the ternary precursor, (2) mixing the lithium salt and the ternary precursor, (3) mixing the lithium salt and the ternary precursor Carry out high-temperature calcination, (4) pulverize the sintered material to obtain a single crystal ternary material. [0003] Among them, in the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50
CPCH01M4/50Y02E60/10
Inventor 李正松孔令涌严泽华李华勇周钰
Owner FOSHAN DYNANONIC
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