Preparation method of cobaltosic oxide with graded distribution of doping elements

A technology of cobalt tetroxide and doping elements, applied in the field of lithium ion batteries, can solve problems such as cumbersome reaction process, achieve the effect of environmental friendliness and avoid the impurity content exceeding the standard

Inactive Publication Date: 2018-03-06
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Preparation method of cobaltosic oxide with graded distribution of doping elements
  • Preparation method of cobaltosic oxide with graded distribution of doping elements
  • Preparation method of cobaltosic oxide with graded distribution of doping elements

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The production steps are the same as above, and the specific parameters in each step are as follows:

[0034] The prepared A solution is a cobalt chloride solution with a concentration of 60g / L and a volume of 120L.

[0035] The prepared B solution is 100g / L sodium hydroxide and 180g / L ammonia solution, and the volume ratio of sodium hydroxide to ammonia water is 1:20.

[0036] Preparation C solution is 10L of magnesium chloride solution of 5g / L, and the total amount of magnesium is about 0.5% of final product quality.

[0037] Prepare D solution as 1mol / L hydrogen peroxide solution.

[0038] At the beginning of the synthesis reaction, determine the reaction time according to the preparation process for 16 hours, add solution C to solution A at a flow rate of 0.625L / h, and simultaneously flow the mixed solution of A and C, solution B, and solution D at a flow rate of 8.125L / h Put it into the reaction kettle, and make the two react under strong stirring. The temperatur...

Embodiment 2

[0042] This example is basically the same as Example 1, except that the following adjustment parameters are different:

[0043] The prepared A solution is a cobalt nitrate solution with a concentration of 100g / L and a volume of 250L.

[0044] The prepared B solution is 200g / L sodium hydroxide and 180g / L ammonia solution, and the volume ratio of sodium hydroxide to ammonia water is 3:25.

[0045] Prepare C solution as 10g / L aluminum and nickel solution 35L, and the total amount of Al and nickel is 1% of the final product mass.

[0046] Prepare the hydrogen peroxide solution whose D solution concentration is 2mol / L.

[0047] At the beginning of the synthesis reaction, determine the reaction time according to the preparation process for 30 hours, add solution C to solution A at a flow rate of 1.17L / h, and simultaneously flow the mixed solution of A and C, solution B, and solution D at a flow rate of 9.5L / h Put it into the reaction kettle, and make the two react under strong sti...

Embodiment 3

[0051] This example is basically the same as Example 1, except that the following adjustment parameters are different:

[0052] The prepared A solution is a cobalt sulfate solution with a concentration of 120g / L and a volume of 500L.

[0053]The prepared B solution is 300g / L sodium hydroxide and 180g / L ammonia solution, and the volume ratio of sodium hydroxide to ammonia water is 1:5.

[0054] Preparation C solution is 84L of copper nitrate and yttrium chloride solution of 20g / L, and the total amount of copper and yttrium is about 2% of the final product quality.

[0055] Prepare the hydrogen peroxide solution whose D solution concentration is 4mol / L.

[0056] At the beginning of the synthesis reaction, according to the preparation process, the reaction time was determined to be 60h, and the C solution was added to the A solution at a flow rate of 1.4L / h. Flow into the reaction kettle, and make the two react under strong stirring. The temperature of the reaction system is 75...

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Abstract

The invention discloses a preparation method of cobaltosic oxide with graded distribution of doping elements. The method comprises the steps of adopting a cobalt salt solution as a raw material, passing through a sodium hydroxide solution, adding a certain proportion of ammonium hydroxide, calculating the amount of a doping element soluble salt solution by volume and a prepared hydrogen peroxide solution, carrying out synthesis reaction, filtering, washing, and drying to obtain a final product. According to the preparation method of the cobaltosic oxide with graded distribution of the doping elements provided by the invention, along with the extending of synthesis reaction time and the step-increasing of the amounts of a doping agent in a reaction still, the doping elements are in graded distribution in a cobaltosic oxide product, and the cobaltosic oxide product with graded distribution of the doping elements is prepared for the first time.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a preparation method of modified tricobalt tetroxide used for lithium ion battery cathode materials. Background technique [0002] Since Japan's Sony Corporation successfully commercialized lithium-ion batteries in 1992, lithium-ion batteries have been widely used due to their unique advantages such as high working voltage, high energy density, long cycle life, low self-discharge, no pollution, and good safety performance. It is used as the power supply of mobile phones, portable computers, video cameras, cameras, etc. and has gradually developed into an energy battery for mainstream applications in aerospace, navigation, artificial satellites, small medical instruments and military communication equipment. [0003] Lithium cobalt oxide is currently the main cathode material for commercial lithium-ion batteries. However, the actual specific capacity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M10/0525
CPCH01M4/364H01M4/523H01M10/0525Y02E60/10
Inventor 常全忠陈晓闯王红忠刘世红吴来红赵亮岳心圆郭培庆高小琴敬军臣张红意
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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