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Positive electrode material for potassium ion battery, preparation method and application thereof

A battery cathode, potassium ion technology, applied in battery electrodes, electrolyte battery manufacturing, batteries and other directions, to achieve good application prospects, low cost, short cycle effects

Active Publication Date: 2019-08-16
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few research reports on positive electrode materials. At present, the reports are mainly organic compounds such as perylenetetracarboxylic dianhydride and inorganic compounds such as Prussian blue and Prussian green. Cathode material has not been reported

Method used

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  • Positive electrode material for potassium ion battery, preparation method and application thereof
  • Positive electrode material for potassium ion battery, preparation method and application thereof
  • Positive electrode material for potassium ion battery, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] A kind of potassium ion battery K 0.67 (Ni 0.167 co 0.167 mn 0.666 )O 2 A method for preparing a positive electrode material, comprising the steps of:

[0032] (1) 43.90g of nickel sulfate hexahydrate, 46.94g of cobalt sulfate heptahydrate and 131.81g of manganese chloride tetrahydrate were dissolved in 1L of deionized water, stirred and dissolved evenly to obtain a mixed metal ion salt solution;

[0033] (2) pump the mixed metal ion salt solution that step (1) obtains into the continuous stirred tank reactor with a peristaltic pump, and add 106g concentration simultaneously and be the sodium carbonate solution of 1.0mol / L; Add ammoniacal liquor to adjust the pH value to 8, react The temperature of the solution in the vessel was controlled at 60°C, protected by nitrogen, and continuously stirred at a speed of 500rmp for 4 hours to obtain a carbonate precursor solution;

[0034] (3) Filter the carbonate precursor solution obtained in step (2), wash it repeatedly wit...

Embodiment 2

[0040] A kind of potassium ion battery K 0.67 (Ni 0.45 co 0.45 mn 0.1 )O 2 A method for preparing a positive electrode material, comprising the steps of:

[0041] (1) Dissolve 106.96g nickel chloride hexahydrate, 107.07g cobalt chloride hexahydrate and 19.79g manganese chloride tetrahydrate in 1L deionized water, stir and dissolve evenly to obtain a mixed metal ion salt solution;

[0042] (2) pump the mixed metal ion salt solution that step (1) obtains into the continuous stirred tank reactor with a peristaltic pump, add 312g concentration simultaneously and be the sodium carbonate solution of 2.0mol / L; Add ammoniacal liquor to adjust the pH value to 10, react The temperature of the solution in the container was controlled at 55°C, protected by nitrogen, and stirred continuously at a speed of 550rmp for 6 hours to obtain a carbonate precursor solution;

[0043] (3) Filter the carbonate precursor solution obtained in step (2), wash it repeatedly with deionized water 5 time...

Embodiment 3

[0046] A kind of potassium ion battery K 0.67 (Ni 0.45 co 0.21 mn 0.34 )O 2 A method for preparing a positive electrode material, comprising the steps of:

[0047] (1) 118.28g nickel sulfate hexahydrate, 59.03g cobalt sulfate heptahydrate and 57.46g manganese sulfate monohydrate were dissolved in 1L deionized water, stirred and dissolved evenly to obtain mixed metal ion salt solution;

[0048] (2) pump the mixed metal ion salt solution that step (1) obtains into the continuous stirred tank reactor with a peristaltic pump, add 159g concentration simultaneously and be the sodium carbonate solution of 1.5mol / L; Add ammoniacal liquor to adjust the pH value to 11, react The temperature of the solution in the vessel was controlled at 60°C, protected by argon, and stirred continuously at a speed of 800rmp for 8 hours to obtain a carbonate precursor solution;

[0049] (3) Filter the carbonate precursor solution obtained in step (2), wash it repeatedly with deionized water 5 times...

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Abstract

The application discloses a positive electrode material for a potassium ion battery and its preparation method and application. The preparation method of the positive electrode material for a potassium ion battery includes the following steps: (1) dissolving soluble nickel salt, soluble cobalt salt and soluble manganese salt in Ionized water obtains a certain concentration of mixed metal ion salt solution, wherein the valence states of nickel, cobalt and manganese in nickel salt, cobalt salt, and manganese salt are positive divalent; (2) the mixed metal ion salt solution is added to the still reactor Add sodium carbonate solution at the same time; then add ammonia water to adjust the pH value to 8-11, control the temperature at 55-60°C, use inert gas protection, and continue stirring; (3) Filter the carbonate precursor solution and use deionized Washing with water, and then drying in an oven; (4) Grinding the precursor powder, pre-sintering, adding anhydrous potassium carbonate, mechanical ball milling, and then high-temperature solid-phase sintering to obtain the chemical formula K x (Ni y co z mn 1‑y‑z )O 2 positive electrode material. The preparation method of the invention has the advantages of simple operation, short cycle and low cost.

Description

technical field [0001] The present disclosure generally relates to the technical field of positive electrode materials, and in particular relates to a positive electrode material for a potassium ion battery and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic products, electric vehicles and hybrid electric vehicles due to their high energy density and excellent energy storage performance. However, the reserves of lithium resources are very limited, and it is difficult to meet the needs of long-term development in the future. Therefore, people have turned their attention to other metal elements that are rich in resources on the earth. At present, sodium-ion batteries, magnesium-ion batteries, aluminum-ion batteries and Potassium ion battery. [0003] Potassium, lithium and sodium are all in the first main group of the periodic table, with similar physical and chemical proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50H01M4/52H01M10/054H01M10/058
CPCH01M4/502H01M4/523H01M10/054H01M10/058H01M2220/20Y02E60/10Y02P70/50
Inventor 罗绍华刘彩玲黄红波包硕胡东北孙阳李家玉
Owner NORTHEASTERN UNIV LIAONING
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