Preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material

A technology of iron-cobalt alloy and carbon aerogel, which is applied in battery electrodes, fuel cell half-cells, secondary battery-type half-cells, circuits, etc., can solve the problem of not effectively reusing, increasing marine pollution, and having no Utilize and other issues to achieve excellent catalytic performance, improve catalytic performance, and increase the effect of basic sites

Active Publication Date: 2020-10-16
南京绿源智慧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of biomass energy technology and the development of the market are not perfect enough, resulting in the waste of a lot of resources and the pollution of certain environments.
It is estimated that the world produces about 10 to 15 billion tons of biomass waste every year, but most of them have not been effectively reused, especially marine debris, such as some seaweed, not only not being used, but also increasing marine pollution

Method used

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  • Preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material
  • Preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material
  • Preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material

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Experimental program
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Effect test

Embodiment 1

[0035] Sodium alginate was selected as the precursor, polypyrrole and melamine were used as the nitrogen source, cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) is cobalt salt, ferric chloride hexahydrate (FeCl 3 ·6H 2 O) is iron salt, prepares the iron-cobalt alloy / nitrogen co-doped carbon airgel electrode material based on sodium alginate:

[0036] Firstly, 1 g of sodium alginate (SA) and 0.1 g of polypyrrole (PPy) were weighed and placed in beaker A, and 50 mL of deionized water was added to dissolve to form a first solution. Weigh 1.25g CoCl 2 ·6H 2 O, 1.25g FeCl 3 ·6H 2 O was placed in beaker B and 50mL of water was added to ultrasonically dissolve to form a second solution, in which Fe 3+ and Co 2+ The molar ratio is about 1:1. Then the mixed solution in beaker A was dripped into B with a syringe, and after standing at room temperature (20° C.) for 1 h, it was washed with deionized water and freeze-dried to obtain a yellow-green airgel. The freeze-dried product wa...

Embodiment 2

[0042] Embodiment 2 (comparative example)

[0043] The difference from Example 1 is that the material is not re-impregnated with nitrogen-doped carbonization after freeze-drying, high-temperature calcination and pickling, and the generated material is carbon aerogel doped with iron-cobalt alloy based on sodium alginate. Labeled as FeCo-SACA-PPy.

Embodiment 3

[0044] Embodiment 3 (comparative example)

[0045] The difference from Example 1 is that no polypyrrole was added to the material when the first solution was prepared, and there was no impregnation and nitrogen doping and re-carbonization process afterwards, and the prepared material was marked as FeCo-SACA.

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Abstract

The invention discloses a preparation method of an iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material, and relates to the field of catalyst preparation. The preparation method comprises the following steps: dispersing sodium alginate and polypyrrole in water to form a first solution, and dispersing ferric salt and cobalt salt in water to form a second solution; dropwise adding the first solution into the second solution, standing for 1h to obtain hydrogel, freeze-drying, performing calcining in nitrogen at high temperature for 1h, and pickling a sample to obtain carbon aerogel; and dipping and doping the solid powder into melamine, performing drying, and performing roasting in N2 to obtain the sodium alginate-based iron-cobalt alloy/nitrogen co-doped electrode material.The catalyst has oxygen reduction (ORR) and oxygen evolution (OER) bifunctional catalytic performance, and the zinc-air battery assembled by the catalyst has high power density and good charging and discharging performance. According to the method, cheap biomass seaweed is recycled, the preparation process is non-toxic and harmless, the cost is low, and the method has a wide industrial applicationprospect.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a method for preparing an iron-cobalt alloy / nitrogen co-doped carbon airgel electrode material, and belongs to the technical field of electrocatalysis. Background technique [0002] With the rapid development of modern industry and society, energy and environmental issues follow. The increasing performance of electric vehicles and mobile devices today creates a strong need for new electrochemical energy storage and conversion devices. So far, rechargeable zinc-air batteries and fuel cells have attracted widespread attention due to their high safety, abundant resources and environmental protection. However, oxygen-reduction electrocatalysts for fuel cells, microbial batteries, metal-air batteries, and other catalytic fields do not possess fast kinetics and have poor stability and methanol resistance, which are severely hindered in their commercial development and application. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/08
CPCH01M4/8825H01M4/9083H01M4/9041H01M12/08H01M2004/8689
Inventor 黄燕李思媛
Owner 南京绿源智慧科技有限公司
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