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A kind of positive electrode material of battery and preparation method thereof

A battery positive electrode and solution technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor cycle performance and poor material morphology, and achieve the effects of good conductivity, low morphology, and many sites

Active Publication Date: 2021-10-15
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor morphology of the material prepared by the preparation method of lithium vanadium phosphate / carbon composite material in the prior art, and poor cycle performance under high magnification, thereby providing a battery Positive electrode material, preparation method thereof and lithium ion battery

Method used

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  • A kind of positive electrode material of battery and preparation method thereof
  • A kind of positive electrode material of battery and preparation method thereof
  • A kind of positive electrode material of battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of preparation method of battery cathode material, operation is as follows:

[0041] (1) Weigh 0.01mol of vanadium pentoxide and 0.023mol of oxalic acid, dissolve them in deionized water, and stir at 40°C until the reagents are completely dissolved to obtain a transparent solution;

[0042] (2) Weigh 0.03mol lithium hydroxide and 0.03mol ammonium dihydrogen phosphate, dissolve in deionized water, stir and dissolve at 40°C to obtain a transparent solution, and mix with the solution obtained in step (1);

[0043] (3) Stir the mixed solution obtained in step (2) at 40° C. until the water in the solution evaporates to form a gel;

[0044] (4) Transfer the gel obtained in step (3) to an oven, dry at 120° C. for 3 hours, form a xerogel and grind it into powder to obtain a xerogel powder;

[0045] (5) Precalcining the dry gel powder obtained in step (4) at 300°C for 2h under an argon atmosphere, raising the temperature to 800°C at a rate of 5°C / min, and calcining at th...

Embodiment 2

[0048] A kind of preparation method of battery cathode material, operation is as follows:

[0049] (1) Weigh 0.02mol of ammonium metavanadate and 0.025mol of oxalic acid, dissolve them in deionized water, and stir at 70°C until the reagents are completely dissolved to obtain a transparent solution;

[0050] (2) Weigh 0.0165mol lithium carbonate and 0.03mol diammonium hydrogen phosphate, dissolve in deionized water, stir and dissolve at 70°C to obtain a transparent solution, and mix with the solution obtained in step (1);

[0051] (3) Stir the mixed solution obtained in step (2) at 70° C. until the water in the solution evaporates to form a gel;

[0052] (4) Transfer the gel obtained in step (3) to an oven, dry at 50°C for 4 hours, form a xerogel and pulverize it to obtain a xerogel powder;

[0053] (5) Precalcining the dry gel powder obtained in step (4) at 500°C for 2h under a nitrogen atmosphere, raising the temperature to 900°C at a rate of 7°C / min, and calcining at this tem...

Embodiment 3

[0056] A kind of preparation method of battery cathode material, operation is as follows:

[0057] (1) Weigh 0.01mol of vanadium pentoxide and 0.027mol of oxalic acid, dissolve them in deionized water, and stir at 90°C until the reagents are completely dissolved to obtain a transparent solution;

[0058] (2) Weigh 0.035mol lithium hydroxide and 0.03mol ammonium dihydrogen phosphate, dissolve in deionized water, stir and dissolve at 90°C to obtain a transparent solution, and mix with the solution obtained in step (1);

[0059] (3) Stir the mixed solution obtained in step (2) at 90° C. until the water in the solution evaporates to form a gel;

[0060] (4) Transfer the gel obtained in step (3) to an oven, dry at 80°C for 5 hours, form a xerogel and grind it into powder to obtain a xerogel powder;

[0061] (5) Precalcining the dry gel powder obtained in step (4) at 400°C for 5h under an argon atmosphere, raising the temperature to 700°C at a rate of 10°C / min, and calcining at thi...

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Abstract

The invention provides a battery cathode material and a preparation method thereof. The preparation method of the positive electrode material of the battery comprises: dissolving vanadium source and oxalic acid in deionized water, heating and stirring until completely dissolved to form a first solution; adding lithium source and phosphorus source into the first solution, heating and stirring until completely dissolving to form a second solution; heating and stirring the second solution until the water evaporates to form a gel; drying the gel to obtain a xerogel; and heat-treating the xerogel to obtain the positive electrode material for the battery. The material finally prepared by adopting the preparation method provided by the invention has good electrical conductivity, controllable appearance, excellent cycle performance under large magnification, simple operation, low price and is suitable for large-scale preparation.

Description

technical field [0001] The invention relates to the field of chemical energy materials, in particular to a battery cathode material and a preparation method thereof. Background technique [0002] Energy is the material basis supporting the progress of the entire human civilization. With the rapid development of social economy, the dependence of human society on energy continues to increase. At present, traditional fossil energy sources such as coal, oil, and natural gas provide the main energy sources for human society. The consumption of fossil energy not only makes it increasingly exhausted, but also has a significant impact on the environment. Therefore, changing the existing unreasonable energy structure has become the primary problem facing the sustainable development of human society. At present, the vigorously developed wind energy, solar energy, tidal energy, and geothermal energy are all renewable and clean energy sources. Due to their randomness and intermittent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5825H01M4/625H01M10/0525Y02E60/10
Inventor 李慧刘双宇王博徐丽白会涛赵广耀盛鹏陈新高山
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD