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A kind of preparation method of ternary cathode material

A positive electrode material and reaction technology, applied in the field of preparation of ternary positive electrode materials, can solve problems such as short history and insufficient maturity, and achieve the effects of low environmental pollution, high performance, and stable charge-discharge cycle

Inactive Publication Date: 2019-11-19
ZHEJIANG IND POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the ternary material has entered the stage of industrialization, but its history is short, the maturity is not enough, and there are still some key scientific and technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a ternary positive electrode material, the steps are as follows:

[0023] Step 1, putting nickel acetate, manganese acetate and cobalt acetate into absolute ethanol, then adding a stabilizer, and after dissolving evenly, the mixed solution can be obtained;

[0024] Step 2, using polyvinylpyrrolidone as an additive to carry out sealing reaction for 3 hours, and vacuum distillation reaction for 2 hours to obtain a mixed solution wrapped in polyvinylpyrrolidone;

[0025] Step 3, lithium carbonate is added to the mixed solution, then a foaming agent is added, and the stirring reaction is carried out until the stirring is uniform to obtain the ternary carbonic acid solution;

[0026] Step 4, putting the ternary carbonic acid solution into the reactor for water bath distillation to form a precipitation mixture;

[0027] In step 5, the precipitation mixture was subjected to gradient heating and constant pressure reaction for 5 hours to obtain a ternary...

Embodiment 2

[0037] A preparation method of a ternary positive electrode material, the steps are as follows:

[0038] Step 1, putting nickel acetate, manganese acetate and cobalt acetate into absolute ethanol, then adding a stabilizer, and after dissolving evenly, the mixed solution can be obtained;

[0039] Step 2, using polyvinylpyrrolidone as an additive to carry out sealing reaction for 8 hours, and vacuum distillation reaction for 4 hours to obtain a mixed solution wrapped in polyvinylpyrrolidone;

[0040] Step 3, lithium carbonate is added to the mixed solution, then a foaming agent is added, and the stirring reaction is carried out until the stirring is uniform to obtain the ternary carbonic acid solution;

[0041] Step 4, putting the ternary carbonic acid solution into the reactor for water bath distillation to form a precipitation mixture;

[0042] In step 5, the precipitation mixture was subjected to gradient heating and constant pressure reaction for 8 hours to obtain a ternary...

Embodiment 3

[0052] A preparation method of a ternary positive electrode material, the steps are as follows:

[0053] Step 1, putting nickel acetate, manganese acetate and cobalt acetate into absolute ethanol, then adding a stabilizer, and after dissolving evenly, the mixed solution can be obtained;

[0054] Step 2, using polyvinylpyrrolidone as an additive to carry out sealing reaction for 5 hours, and vacuum distillation reaction for 3 hours to obtain a mixed solution wrapped in polyvinylpyrrolidone;

[0055] Step 3, lithium carbonate is added to the mixed solution, then a foaming agent is added, and the stirring reaction is carried out until the stirring is uniform to obtain the ternary carbonic acid solution;

[0056] Step 4, putting the ternary carbonic acid solution into the reactor for water bath distillation to form a precipitation mixture;

[0057] In step 5, the precipitation mixture was subjected to gradient heating and constant pressure reaction for 7 hours to obtain a ternary...

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Abstract

The invention discloses a method for preparing a high-performance intensive ternary cathode material. The method is characterized in that nickel acetate, manganese acetate and cobaltous acetate are taken as raw materials and polyvinylpyrrolidone serves as an additive to be dissolved in absolute ethyl alcohol, sealed reaction and reduced pressure distillation are performed to obtain polyvinylpyrrolidone-coated nanoscale nickel oxide, manganese oxide and cobalt oxide, then lithium carbonate and a foaming agent are added to obtain a ternary carbonic acid solution, and at last, water-bath distillation and gradient heating constant-pressure reaction are performed to obtain the ternary cathode material. The prepared ternary cathode material has the advantages of stable charge and discharge cycle, high temperature stability, low cost, small environmental pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of ternary positive electrode materials, and in particular relates to a preparation method of ternary positive electrode materials. 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 祝良荣杨建青
Owner ZHEJIANG IND POLYTECHNIC COLLEGE
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