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Preparation method of porous spherical structure Ni/NiFeO4 zinc-air battery catalyst

A zinc-air battery and spherical structure technology, applied in battery electrodes, structural parts, circuits, etc., to achieve mild reaction conditions, low energy consumption, and broad application prospects

Inactive Publication Date: 2019-10-29
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amorphous Ni-Fe oxides with lattice distortion are known to be more active for OER / ORR than their crystalline forms; however, the disadvantage of amorphous oxides is that it is difficult to form in the amorphous phase with abundant electrochemically active sites highly nanoporous morphology of dots

Method used

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  • Preparation method of porous spherical structure Ni/NiFeO4 zinc-air battery catalyst
  • Preparation method of porous spherical structure Ni/NiFeO4 zinc-air battery catalyst
  • Preparation method of porous spherical structure Ni/NiFeO4 zinc-air battery catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 0.1390g of ferrous sulfate and 0.1314g of nickel sulfate in 30mL of distilled water, stir and mix evenly, add 0.267g of ammonium chloride to it to obtain a uniform and stable solution, then add 0.125g of hydrazine to it, stir at 25°C for 10min, and finally transfer Put it in a polytetrafluoroethylene-lined stainless steel autoclave and keep it at 180°C for 6h. After the autoclave is naturally cooled to room temperature, it is washed several times with water and placed in an oven to dry for 12h to obtain a Ni / NiFeO4 zinc-air battery catalyst.

[0022] Take 2 mg of the Ni / NiFeO4 zinc-air battery catalyst prepared in this example and disperse it in an ethanol dispersant, then add carbon black, apply the mixed solution evenly by ultrasonic waves, and then apply it on the surface of a glassy carbon electrode. Using a three-electrode system, measure it by an electrochemical workstation. The performance of the catalyst, the electrical performance test results are as fo...

Embodiment 2

[0024] Dissolve 0.1390g of ferrous sulfate and 0.1314g of nickel sulfate in 30mL of distilled water, stir and mix evenly, add 0.267g of ethylenediamine to it to obtain a uniform and stable solution, then add 0.125g of hydrazine to it, stir at 25°C for 10min, and finally transfer Put it in a polytetrafluoroethylene-lined stainless steel autoclave and keep it at 180 ° C for 6 hours. After the reactor is naturally cooled to room temperature, it is washed several times with water and placed in an oven to dry for 12 hours to obtain Ni / NiFeO 4 Catalysts for zinc-air batteries.

Embodiment 3

[0026] Dissolve 0.0927g of ferrous sulfate and 0.1792g of nickel sulfate in 30mL of distilled water, stir and mix evenly, add 0.267g of ammonium chloride to it to obtain a uniform and stable solution, then add 0.125g of hydrazine to it, stir at 25°C for 10min, and finally transfer Put it in a polytetrafluoroethylene-lined stainless steel autoclave and keep it at 180 ° C for 6 hours. After the reactor is naturally cooled to room temperature, it is washed several times with water and placed in an oven to dry for 12 hours to obtain Ni / NiFeO 4 Catalysts for zinc-air batteries.

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Abstract

The invention discloses a preparation method of a porous spherical structure Ni / NiFeO4 zinc-air battery catalyst. Nickel sulfate, iron sulfate and a nitrogen source are dissolved in distilled water, stirred and mixed uniformly, and then stand at 25 DEG C for 10 minutes until equilibrium is reached. Hydrazine is added into the equilibrium solution, and standing is carried out at 25 DEG C for 10 h to acquire a homogeneous stable solution. The homogeneous stable solution is transferred to a Teflon-lined stainless steel high pressure reactor at 180 DEG C for 6 h. After the reactor is naturally cooled to room temperature, the reaction product is washed several times and then vacuum dried to acquire the porous spherical structure Ni / NiFeO4 zinc-air battery catalyst with the average particle diameter of 20 to 25 nm. The zinc-air battery catalyst with the porous spherical structure, which is provided by the invention, has a large specific surface area, has more exposed active sites, and can bein better contact with an electrolyte, and can effectively improve the electrocatalytic activity of a dual-function electrocatalyst.

Description

technical field [0001] The invention belongs to the technical field of zinc-air battery catalysts, in particular to a Ni / NiFeO with a porous spherical structure 4 Preparation method of catalyst for zinc-air battery. Background technique [0002] As a clean energy source, zinc-air battery has the advantages of high specific energy, low cost, and no pollution. It has experimental applications in many fields and has become a research hotspot in recent years. Catalyst is the core component in Zn-air battery, and it is also the key material that determines the cost and performance of the battery. In recent years, researches on catalysts for Zn-air batteries have emerged in an endless stream, however, the synthesis of bifunctional electrocatalysts for ORR and OER is still challenging. Therefore, the development of a bifunctional electrocatalyst has become one of the important problems to be solved in the field of zinc-air battery catalyst synthesis technology. [0003] Recently...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9016Y02E60/50
Inventor 杨林谷佳莉王荷
Owner HENAN NORMAL UNIV
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