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Preparation method and application of potassium ion battery positive electrode material

A battery cathode, potassium ion technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unstable cycle performance of potassium ion battery cathode materials, and achieve good cycle stability, good rate performance, and simple process. Effect

Inactive Publication Date: 2019-05-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at problems such as unstable cycle performance of the positive electrode material of the existing potassium ion battery, and provides a preparation method and application of the positive electrode material of the potassium ion battery

Method used

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  • Preparation method and application of potassium ion battery positive electrode material
  • Preparation method and application of potassium ion battery positive electrode material
  • Preparation method and application of potassium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of potassium ion battery K 0.5 Ni 0.15 co 0.15 mn 0.7 o 2 The preparation method of positive electrode material, preparation process is as follows:

[0035] (1) First, dissolve 3.7326g nickel acetate tetrahydrate in 15ml deionized water, dissolve 3.7362g cobalt acetate tetrahydrate in 15ml deionized water, dissolve 17.1563g manganese acetate tetrahydrate in 70ml deionized water, and then dissolve the three metal ions The salt solutions are mixed together and stirred evenly to obtain a mixed metal ion salt solution. At the same time, 12.607g of oxalic acid solid was dissolved in 100ml of deionized water to obtain an oxalic acid solution;

[0036](2) Put the beaker containing the oxalic acid solution obtained in step (1) into a water bath, and after the water temperature reaches 60°C, slowly drop the mixed metal ion salt solution obtained in step (1) into the oxalic acid solution, and control the stirring The speed is 400rmp, and after 5 hours of reaction, th...

Embodiment 2

[0041] A kind of potassium ion battery K 0.5 Ni 0.1 co 0.4 mn 0.5 o 2 The preparation method of positive electrode material, preparation process is as follows:

[0042] (1) First, dissolve 2.4884g nickel acetate tetrahydrate in 10ml deionized water, dissolve 9.9632g cobalt acetate tetrahydrate in 40ml deionized water, dissolve 12.2545g manganese acetate tetrahydrate in 50ml deionized water, and then dissolve the three metal ions The salt solutions are mixed together and stirred evenly to obtain a mixed metal ion salt solution. At the same time, 13.867g of oxalic acid solid was dissolved in 100ml of deionized water to obtain an oxalic acid solution;

[0043] (2) Put the beaker containing the oxalic acid solution obtained in step (1) into a water bath, and after the water temperature reaches 60°C, slowly drop the mixed metal ion salt solution obtained in step (1) into the oxalic acid solution, and control the stirring The speed is 400rmp, and after 5 hours of reaction, the...

Embodiment 3

[0050] A kind of potassium ion battery K 0.6 Ni 0.2 co 0.2 mn 0.6 o 2 The preparation method of positive electrode material, preparation process is as follows:

[0051] (1) First, dissolve 4.9768g nickel acetate tetrahydrate in 20ml deionized water, dissolve 4.9816g cobalt acetate tetrahydrate in 20ml deionized water, dissolve 14.7054g manganese acetate tetrahydrate in 60ml deionized water, and then dissolve the three metal ions The salt solutions are mixed together and stirred evenly to obtain a mixed metal ion salt solution. At the same time, 13.867g of oxalic acid solid was dissolved in 100ml of deionized water to obtain an oxalic acid solution;

[0052] (2) Put the beaker containing the oxalic acid solution obtained in step (1) into a water bath, and after the water temperature reaches 60°C, slowly drop the mixed metal ion salt solution obtained in step (1) into the oxalic acid solution, and control the stirring The speed is 450rmp, and after 6 hours of reaction, the...

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Abstract

The invention provides a preparation method and application of a potassium ion battery positive electrode material and belongs to the technical field of electrochemical new energy, and the problem ofunstable cycling performance of the potassium ion battery positive electrode material can be solved. The chemical formula of the material is KtNixCoyMnzO2, t is larger than 0.5 and smaller than 0.9, xis larger than 0.15 and smaller than 0.4, y is larger than 0.15 and smaller than 0.4, and z is larger than 0.2 and smaller than 0.7. According to a synthetic route, three soluble acetates of nickel acetate, cobalt acetate and manganese acetate are used and are dissolved in deionized water in proportion to obtain a mixed metal ion salt solution, the mixed metal ion salt solution is slowly droppedinto an oxalic acid solution to obtain an oxalate precipitate, after processes of washing, drying and pre-sintering, a potassium source is added, high-temperature sintering is performed, and cooling with a furnace is carried out obtain the material. The method has the advantages of simple operation, low cost and universality, and the prepared material is used for a new potassium ion battery test and has good cycle stability and rate performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemical new energy, and in particular relates to a preparation method and application of a positive electrode material of a potassium ion battery. Background technique [0002] Over the past 100 years, traditional fossil energy sources, including coal, oil, and natural gas, have provided a strong driving force for the development of human civilization. However, with the continuous reduction of fossil energy reserves on the earth, the energy crisis has continued to worsen, and these fossil energy sources are being used The process has brought inevitable environmental pollution problems, the greenhouse effect and so on. The development of sustainable and clean energy is imminent. New clean energy mainly includes: wind energy, water energy, solar energy, etc. Among them, large and medium-sized energy storage batteries have attracted people's attention. [0003] Since the advent of lithium cobalt oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/054
CPCY02E60/10
Inventor 徐守冬包晨旭张鼎陈良刘世斌
Owner TAIYUAN UNIV OF TECH
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