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A kind of preparation method of cobalt manganese oxygen catalyst

A cobalt manganese oxide catalyst, manganese sulfate technology, applied in fuel cell type half cells and primary cell type half cells, nanotechnology for materials and surface science, electrical components, etc., can solve the high cost and disadvantage of precious metals. Practical application and other issues, to achieve the effects of cheap raw materials, improved electrochemical performance, simple and environmentally friendly preparation process

Inactive Publication Date: 2018-08-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high raw material cost of noble metals is not conducive to practical applications. Therefore, it is of great application significance to further explore other catalysts suitable for lithium-air batteries, adjust their size, morphology and internal structure, and improve their preparation processes and conditions.

Method used

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  • A kind of preparation method of cobalt manganese oxygen catalyst
  • A kind of preparation method of cobalt manganese oxygen catalyst
  • A kind of preparation method of cobalt manganese oxygen catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A preparation method of cobalt-manganese-oxygen catalyst, comprising the following steps:

[0038] 1) Dissolve potassium permanganate and manganese sulfate in 80mL water at a molar ratio of 2:3 and mix evenly, react at room temperature for 6h, filter and dry to obtain amorphous MnO 2 powder;

[0039] 2) the resulting amorphous MnO 2 The powder and cobalt chloride were dissolved in 10mL of water at a molar ratio of 2:1, stirred for 15min, and mixed uniformly to obtain a mixed solution I;

[0040] 3) Mix 0.02mol of sodium borohydride and 0.1mmol of sodium hydroxide, dissolve in 10mL of water, stir for 15min, and mix uniformly to obtain mixed liquid II;

[0041] 4) Add the obtained mixed solution II into the mixed solution I, and react under stirring conditions, the stirring temperature is 25° C., and the stirring time is 10 min. After the reaction is completed, filter to obtain the final product.

[0042] The product obtained in this embodiment is analyzed by X-ray dif...

Embodiment 2

[0045] A preparation method of cobalt-manganese-oxygen catalyst, comprising the following steps:

[0046] 1) Dissolve potassium permanganate and manganese sulfate in 80mL water at a molar ratio of 2:3 and mix evenly, react at room temperature for 6h, filter and dry to obtain amorphous MnO 2 powder;

[0047] 2) the resulting amorphous MnO 2 The powder and cobalt chloride were dissolved in 10 mL of water at a molar ratio of 2:1, stirred for 15 min, and mixed uniformly to obtain solution I;

[0048] 3) Mix 5mmol of sodium borohydride and 0.1mmol of sodium hydroxide, dissolve in 10mL of water, stir for 15min, and mix well to obtain a mixture II;

[0049] 4) The obtained solution II was added to the mixed solution I, and the reaction was carried out under the condition of stirring, the stirring temperature was 25° C., and the stirring time was 10 min. After the reaction was completed, the cobalt-manganese-oxygen catalyst was obtained by filtering.

[0050] The product obtained i...

Embodiment 3

[0053] A preparation method of cobalt-manganese-oxygen catalyst, comprising the following steps:

[0054] 1) Dissolve potassium permanganate and manganese sulfate in 80mL water at a molar ratio of 2:3 and mix evenly, react at room temperature for 6h, filter and dry to obtain amorphous MnO 2 powder;

[0055] 2) the resulting amorphous MnO 2 The powder and cobalt chloride were dissolved in 10 mL of water at a molar ratio of 2:1, stirred for 15 min, and mixed uniformly to obtain solution I;

[0056] 3) Mix 0.02mol of sodium borohydride and 0.1mmol of potassium hydroxide, dissolve in 10mL of water, stir for 15min, and mix uniformly to obtain a mixture II;

[0057] 4) The obtained solution II was added to the mixed solution I, and the reaction was carried out under the condition of stirring, the stirring temperature was 60° C., and the stirring time was 10 min. After the reaction was completed, the cobalt-manganese-oxygen catalyst was obtained by filtering.

[0058] The product ...

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Abstract

The invention provides a preparation method of a cobalt-manganese-oxide catalyst and an application of the cobalt-manganese-oxide catalyst in a lithium-air battery. The cobalt-manganese-oxide catalyst is prepared by rapidly stirring a solution at a room temperature. The method specifically comprises the following steps: (1) dissolving potassium permanganate and manganese sulfate into water, mixing the solution evenly, carrying out a reaction at the room temperature and carrying out suction filtration and drying to obtain amorphous MnO2 powder; (2) dispersing the obtained amorphous MnO2 powder and cobalt chloride into water, and stirring and mixing the solution evenly to obtain a mixed liquid I; (3) mixing sodium borohydride and an inorganic base, and dissolving the mixture into water for stirring evenly, so as to obtain a mixed liquid II; and (4) adding the obtained mixed liquid II to the mixed liquid I, carrying out the reaction under a stirring condition, so as to obtain a product, namely the cobalt-manganese-oxide catalyst. The related raw materials are cheap and available; the process is simple and easy to achieve; the yield is relatively high; and the prepared cobalt-manganese-oxide catalyst is in a porous nanosphere shape, and displays excellent electrochemical properties when applied to the lithium-air battery.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials and electrochemical device materials, and in particular relates to a preparation method of a cobalt-manganese-oxygen catalyst. Background technique [0002] With the intensified consumption of irreversible energy such as petroleum, the chemical energy system is facing increasingly severe challenges. However, the energy density of traditional lithium-ion batteries still cannot meet the growing energy demand. In this case, because the energy density of lithium-air batteries is much higher than that of lithium-ion batteries, its specific energy or energy density is comparable to that of gasoline and diesel. Similarly, a single charge is expected to extend the range of electric vehicles by more than 500km, which has attracted widespread attention. More importantly, lithium-air batteries do not produce harmful pollutants during the reaction process, and are a new type of energy storage sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M12/06B82Y30/00
CPCB82Y30/00H01M4/9016H01M4/9091H01M12/06
Inventor 王洪恩黄兴蔡祎苏宝连
Owner WUHAN UNIV OF TECH
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