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Preparation method of manganese cobalt oxide with porous spherical hollow structure and application thereof

A porous spherical, oxide technology, applied in the direction of structural parts, fuel cell type half cells and primary cell type half cells, electrical components, etc., can solve many influencing factors, difficult to adapt to industrial needs, poor controllability, etc. problems, to achieve the effect of simple equipment, easy large-scale synthesis, and good crystallinity

Active Publication Date: 2019-11-01
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has many influencing factors in the synthesis process and poor controllability, so it is difficult to adapt to industrial needs

Method used

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  • Preparation method of manganese cobalt oxide with porous spherical hollow structure and application thereof
  • Preparation method of manganese cobalt oxide with porous spherical hollow structure and application thereof
  • Preparation method of manganese cobalt oxide with porous spherical hollow structure and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] At room temperature, mix 30ml of ethylene glycol with 20ml of anhydrous methanol, and stir for 10min to obtain a homogeneous solution. Weigh 2 mmol of manganese acetate and add to the above solution, and stir at room temperature for 24 h to obtain a dark brown mixed solution. The manganese acetate solution was dried in an oven at 80°C for 10 hours, and the solution obtained above was transferred to a crucible so that the filling degree in the crucible was 3vol.%-10vol.%. The crucible containing the solution was placed in a muffle furnace, heated to 400 °C at a heating rate of 2 °C / min and kept for 6 h to obtain a brown-black sample. Such as figure 1 , the product is Mn with pure phase spinel structure 3 o 4 ;Such as figure 2 , the obtained product has a porous core-shell structure, its outer diameter is 0.40 μm-1.60 μm, and its inner diameter is 0.45 μm-0.90 μm.

[0039] The metal oxide materials obtained above were used as electrode catalyst materials to study th...

Embodiment 2

[0044] At room temperature, mix 30ml of ethylene glycol with 20ml of anhydrous methanol, and stir for 10min to obtain a homogeneous solution. Weighed 0.67 mmol of cobalt acetate and 1.33 mmol of manganese acetate and added to the above solution, and stirred at room temperature for 24 hours to obtain a dark brown mixed solution. The manganese-cobalt mixed solution was dried in an oven at 80°C for 10 hours, and the solution obtained above was transferred to a crucible so that the filling degree in the crucible was 3vol.%-10vol.%. The crucible containing the solution was placed in a muffle furnace, heated to 400 °C at a heating rate of 2 °C / min and kept for 6 h to obtain a brown-black sample. Such as figure 1 , the product is pure phase spinel structure CoMn 2 o 4 ;Such as image 3 , the obtained product is a porous spherical shell structure, and its outer diameter is 0.40 μm-1.60 μm.

[0045] Adopt the same method as embodiment 1 to test the CoMn of porous spherical shell t...

Embodiment 3

[0047] At room temperature, mix 30ml of ethylene glycol with 20ml of anhydrous methanol, and stir for 10min to obtain a homogeneous solution. Weighed 1.33 mmol of cobalt acetate and 0.67 mmol of manganese acetate and added to the above solution, and stirred at room temperature for 24 hours to obtain a dark red mixed solution. The manganese-cobalt mixed solution was dried in an oven at 80°C for 10 hours, and the solution obtained above was transferred to a crucible so that the filling degree in the crucible was 3vol.%-10vol.%. The crucible containing the solution was placed in a muffle furnace, heated to 400°C at a heating rate of 2°C / min and kept for 6h to obtain a black sample. Such as figure 1 , the product is pure phase spinel structure MnCo 2 o 4 ;Such as Figure 4 , the obtained product is a porous spherical hollow structure with an outer diameter of 0.10 μm-0.50 μm.

[0048] The MnCo of porous hollow spherical structure is tested by the same method as in Example 1 ...

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Abstract

The invention relates to a preparation method of manganese cobalt oxide with a porous spherical hollow structure and an application thereof. The method is characterized in that manganese acetate and cobalt acetate are used as a manganese source and a cobalt source, ethylene glycol and methanol are used as organic solvents, the porous spherical hollow structure manganese cobalt oxide material having a uniform size is prepared in one step by an organic solvent combustion method, and Mn3O4 with a porous spherical core-shell structure, CoMn2O4 with a porous spherical shell structure, MnCo2O4 witha porous spherical hollow structure and Co3O4 with a uniform solid spherical structure are obtained by adjusting the ratio of manganese to cobalt. The method is advantaged in that the porous materialmanganese cobalt oxide has good catalytic performance for ORR OER, and the method has the characteristics of simple operation, low process cost and regular shape rules and has important significance for large-scale industrial production and practical application of the manganese cobalt oxide with the porous spherical structure.

Description

technical field [0001] The invention belongs to the technical field of zinc-air battery catalysts, and relates to a preparation method of manganese-cobalt oxide with a porous spherical hollow structure and its application in ORR and OER electrocatalysis. Background technique [0002] With the rapid development of society, people's demand for energy is increasing. At present, most of the energy comes from fossil fuels. These traditional energy sources will cause serious environmental pollution and threaten human health. There is a need to develop the next generation of renewable energy devices to replace fossil fuels in a clean way. Electrochemical energy storage and conversion is considered to be an ideal way to develop efficient and clean energy devices. Among them, zinc-air batteries are expected to become a new generation of energy storage devices due to their low cost, safety, and environmental friendliness. The discharge process of zinc-air batteries involves oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/9016H01M4/8882H01M12/06
Inventor 陈铁红陈少华
Owner NANKAI UNIV
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