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A kind of ternary cathode material and preparation method thereof

A positive electrode material and molar weight technology, applied in the field of ternary positive electrode material and its preparation, to achieve the effects of environmental protection processing cost, high purity and saving processing cost

Active Publication Date: 2019-02-19
湖南裕能新能源电池材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a ternary positive electrode material and its preparation method. The present invention solves the conductance loss caused by the gap between the ternary materials, does not produce impurities during the production process, is more environmentally friendly and saves waste liquid or waste residue processing cost

Method used

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Examples

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Effect test

Embodiment 1

[0029] A kind of ternary cathode material, the chemical formula of ternary cathode material is LiNi 1-x-y co x mn y o 2 , wherein x=0.4, y=0.3, the ternary positive electrode material is doped with carbon fiber, and the ratio of the carbon fiber to the ternary positive electrode material is 0.09:1.10.

[0030] The preparation method of the high-performance ternary positive electrode material is as follows:

[0031] Step 1, putting cobalt acetate, manganese acetate and nickel acetate into the acetic acid solution, and adding lithium acetate, stirring and mixing to obtain a positive electrode material precursor;

[0032] Step 2, adding an alkaline regulator dropwise to the precursor solution to adjust the pH to neutral;

[0033] Step 3, the carbon dioxide gas is reacted by means of circular aeration to obtain a suspension with sedimentation;

[0034] Step 4, putting the filter residue after filtering the suspension into an aqueous ethanol solution, and adding a small amount...

Embodiment 2

[0048] A kind of ternary cathode material, the chemical formula of ternary cathode material is LiNi 1-x-y co x mn y o 2 , wherein x=0.1, y=0.1, the ternary positive electrode material is doped with carbon fiber, and the ratio of the carbon fiber to the ternary positive electrode material is 0.16:2.33.

[0049] The preparation method of the high-performance ternary positive electrode material is as follows:

[0050] Step 1, putting cobalt acetate, manganese acetate and nickel acetate into the acetic acid solution, and adding lithium acetate, stirring and mixing to obtain a positive electrode material precursor;

[0051] Step 2, adding an alkaline regulator dropwise to the precursor solution to adjust the pH to neutral;

[0052] Step 3, the carbon dioxide gas is reacted by means of circular aeration to obtain a suspension with sedimentation;

[0053] Step 4, putting the filter residue after filtering the suspension into an aqueous ethanol solution, and adding a small amount...

Embodiment 3

[0067] A kind of ternary cathode material, the chemical formula of ternary cathode material is LiNi 1-x-y co x mn y o 2 , wherein x=0.3, y=0.2, the ternary positive electrode material is doped with carbon fiber, and the ratio of the carbon fiber to the ternary positive electrode material is 0.91:1.78.

[0068] The preparation method of the high-performance ternary positive electrode material is as follows:

[0069] Step 1, putting cobalt acetate, manganese acetate and nickel acetate into the acetic acid solution, and adding lithium acetate, stirring and mixing to obtain a positive electrode material precursor;

[0070] Step 2, adding an alkaline regulator dropwise to the precursor solution to adjust the pH to neutral;

[0071] Step 3, the carbon dioxide gas is reacted by means of circular aeration to obtain a suspension with sedimentation;

[0072] Step 4, putting the filter residue after filtering the suspension into an aqueous ethanol solution, and adding a small amount...

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Abstract

The invention discloses a high-performance ternary positive electrode material. A chemical formula of the ternary positive electrode material is LiNi<1-x-y>Co<x>Mn<y>O<2>, wherein x is smaller than or equal to 0.4 and greater than 0 and y is smaller than or equal to 0.3 and greater than 0; the ternary positive electrode material is doped with a carbon fiber; and the ratio of the carbon fiber to the ternary positive electrode material is (0.09-0.16):(1.10-2.33). The invention further provides a preparation method of the high-performance ternary positive electrode material. The conductive loss caused by gaps in the ternary material is avoided; no impurity is generated in the preparation process; the high-performance ternary positive electrode material is relatively environment-friendly; and the treatment cost of liquid waste or waste residues is reduced.

Description

technical field [0001] The invention belongs to the technical field of ternary cathode materials, and in particular relates to a ternary cathode material and a preparation method thereof. Background technique [0002] Lithium cobalt oxide, as the first batch of lithium-ion battery cathode materials on the market, has excellent properties such as simple preparation process, stable material structure, high energy density, good cycle performance, high and stable discharge platform, and has become the most mature cathode material at present. However, lithium cobalt oxide has poor thermal stability and potential safety hazards; in addition, cobalt is poisonous and resource-poor, and the market demand for lithium-ion batteries is gradually increasing, causing the price of cobalt to rise sharply, which restricts the development of the industry and the development of lithium-ion batteries. Applications. For this reason, other positive electrode materials must be found to replace it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/362H01M4/505H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 黄俊杰
Owner 湖南裕能新能源电池材料股份有限公司
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