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Preparation method of multi-transition metal nitride zinc-air battery cathode material

A technology of zinc nitride and cathode material is applied in battery electrodes, fuel cell type half cells and secondary battery type half cells, circuits, etc. Strong charge-discharge long-term cycle stability, rich pore structure, and anti-aggregation effects

Active Publication Date: 2020-02-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the catalyst preparation methods currently used by the research team have cumbersome synthesis steps and are not universal.

Method used

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  • Preparation method of multi-transition metal nitride zinc-air battery cathode material
  • Preparation method of multi-transition metal nitride zinc-air battery cathode material
  • Preparation method of multi-transition metal nitride zinc-air battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) After dissolving 0.45g of guanidine carbonate in 30mL of deionized water, add 0.15g of Co(CH 3 COO) 2 ·6H 2 O, stirred at room temperature for 10min; subsequently, added 0.80g Zn(NO 3 ) 2 ·6H 2 O, and after stirring at room temperature for 30min, a transition metal salt solution was formed;

[0038] (2) Add 0.3 g of locust bean gum to the transition metal solution, and stir at room temperature for 3 hours to obtain a viscous liquid;

[0039](3) freeze-drying the viscous liquid obtained in step (2) at -85°C to obtain a spongy solid;

[0040] (4) Put the spongy solid in step (3) into a covered porcelain crucible and then put it into a tube furnace, then raise the temperature to 900°C at a heating rate of 5°C / min under an argon (Ar) atmosphere Argon (Ar), and kept at this temperature for 1.5h; to be naturally cooled to room temperature to obtain a black powder. Named Zn / CoN-NC.

[0041] The final electrocatalysts obtained above were characterized by X-ray diffr...

Embodiment 2

[0043] (1) After dissolving 0.45g of guanidine carbonate in 30mL of deionized water, add 0.12g of MnCl 2 4H 2 O, stirred at room temperature for 10min; subsequently, added 0.80g Zn(NO 3 ) 2 ·6H 2 O, and after stirring at room temperature for 30min, a transition metal salt solution was formed;

[0044] (2) Add 0.3 g of locust bean gum to the transition metal solution, and stir at room temperature for 3 hours to obtain a viscous liquid;

[0045] (3) freeze-drying the viscous liquid obtained in step (2) at -85°C to obtain a spongy solid;

[0046] (4) Put the spongy solid in step (3) into a covered porcelain crucible and then put it into a tube furnace, then raise the temperature to 900°C at a heating rate of 5°C / min under an argon (Ar) atmosphere Argon (Ar), and kept at this temperature for 1.5h; to be naturally cooled to room temperature to obtain a black powder. Named Zn / MnNC.

[0047] The final electrocatalysts obtained above were characterized by X-ray diffraction (XRD...

Embodiment 3

[0049] (1) After dissolving 0.45g of guanidine carbonate in 30mL of deionized water, add 0.80g of Zn(NO 3 ) 2 ·6H 2 O, and stirred at room temperature for 10 min; subsequently, 0.034 g of CuCl was added to the above aqueous solution 2 2H 2 O forms a transition metal salt solution;

[0050] (2) Add 0.3 g of locust bean gum to the transition metal solution, and stir at room temperature for 3 hours to obtain a viscous liquid;

[0051] (3) freeze-drying the viscous liquid obtained in step (2) at -85°C to obtain a spongy solid;

[0052] (4) Put the spongy solid in step (3) into a covered porcelain crucible and then put it into a tube furnace, then raise the temperature to 900°C at a heating rate of 5°C / min under an argon (Ar) atmosphere Argon (Ar), and kept at this temperature for 1.5h; to be naturally cooled to room temperature to obtain a black powder. Named Zn / CuNC.

[0053] The final electrocatalysts obtained above were characterized by X-ray diffraction (XRD), scanning ...

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Abstract

The invention belongs to the field of zinc-air batteries, and particularly relates to a preparation method of a multi-transition metal nitride zinc-air battery cathode material and an application of the multi-transition metal nitride zinc-air battery cathode material in the field of zinc-air batteries. The preparation method specifically comprises the following steps: dissolving guanidine carbonate and transition metal salt in water to obtain a transition metal salt solution; freeze-drying the obtained transition metal salt solution to obtain a spongy solid; and finally, calcining the spongy solid at high temperature under the protection of inert gas to obtain a multi-transition metal nitride porous reticular material. The multi-transition metal nitride porous reticular material can be used as an oxygen reduction electrocatalyst and shows excellent stability. As a zinc-air battery air cathode catalyst material, the catalyst material shows relatively strong charging and discharging long-term cyclicity, and has a very considerable actual application prospect. In addition, the synthesis method is simple to operate and high in universality.

Description

technical field [0001] The invention belongs to the field of air batteries and fuel cells, and in particular relates to a preparation method of a multi-transition metal nitride zinc-air battery cathode material and its application in the field of zinc-air batteries. Background technique [0002] In today's society where energy and environmental protection are two important themes, in order to meet the huge growing needs of human beings, new energy storage and conversion devices are particularly important. As a common energy storage and conversion device, metal-air batteries have the characteristics of low cost, environmental protection and pollution-free, safe and high theoretical energy density. In the working process of metal-air batteries, the oxygen reduction reaction (ORR) involved in the air cathode is an important basic reaction that determines the working efficiency of the battery. However, the oxygen reduction reaction still suffers from the serious disadvantage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/08
CPCH01M4/9083H01M12/08Y02E60/50
Inventor 徐丽邓代洁李赫楠
Owner JIANGSU UNIV
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