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Preparation method and application of polyionic liquid functionalized cobalt-nitrogen loaded foamed nickel composite material

A technology of polyionic liquids and composite materials, which is applied in the preparation of foamed nickel composite materials and the application field of oxygen reduction reaction, which can solve the problems of affecting catalytic activity and reducing electrode conductivity, so as to reduce charge transfer resistance and increase electron transfer rate, the effect of increasing catalytically active sites

Active Publication Date: 2021-01-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It reduces the conductivity of the electrode and affects the catalytic activity, which has certain limitations

Method used

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  • Preparation method and application of polyionic liquid functionalized cobalt-nitrogen loaded foamed nickel composite material
  • Preparation method and application of polyionic liquid functionalized cobalt-nitrogen loaded foamed nickel composite material
  • Preparation method and application of polyionic liquid functionalized cobalt-nitrogen loaded foamed nickel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Synthesis of polyionic liquid (Explanation: The molar ratio of 1,5-dichloro-2,4-dinitrobenzene to 2-methylimidazole is 1:1.2)

[0032] Put 0.01 mole of 1,5-dichloro-2,4-dinitrobenzene and 0.012 mole of 2-methylimidazole into a three-necked flask, then add 10ml of absolute ethanol to dissolve it; 2 Heated in an oil bath at 85°C for 48 hours under the protection of the atmosphere, and kept condensing and refluxing; the solid product was separated after the reaction was completed, and the solid product was separated by adding anhydrous ethanol and deionized water for 3 times, respectively, and the solid product was separated again; The polyionic liquid poly[Dbz-mim]cl can be obtained by putting it into a vacuum oven and drying at 55°C for 24 hours.

[0033] 2. Preparation of Foamed Nickel Composites

[0034] Cut the nickel foam into a square shape of 1cmx1cm size and wait for treatment; dilute the acetic acid in the laboratory to 3mol / L, so that the nickel foam is ultr...

Embodiment 2

[0036] 1. Synthesis of Polyionic Liquids

[0037] Put 0.02 mole of 1,5-dichloro-2,4-dinitrobenzene and 0.024 mole of 2-methylimidazole into a three-necked flask, then add 20ml of absolute ethanol to dissolve it; 2 Heated in an oil bath at 85°C for 48 hours under the protection of the atmosphere, and kept condensing and refluxing; the solid product was separated after the reaction was completed, and the solid product was separated by adding anhydrous ethanol and deionized water for 3 times, respectively, and the solid product was separated again; Put it into a vacuum oven and dry at 55° C. for 24 hours to prepare the polyionic liquid.

[0038] 2. Preparation of Foamed Nickel Composites

[0039] Cut the nickel foam into a square shape of 1cmx1cm size and wait for treatment; dilute the acetic acid in the laboratory to 3mol / L, so that the nickel foam is ultrasonically treated with acetic acid, absolute ethanol, and deionized water (all volumes are 20ml) for 10 minutes to remove ...

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Abstract

The invention relates to a preparation method and application of a polyionic liquid functionalized cobalt-nitrogen loaded foamed nickel composite material. The method comprises the following steps of:1, uniformly coating a treated polyionic liquid solution on foamed nickel, and then performing drying; 2, immersing the foamed nickel treated in the step 1 into a mixed solution containing urea, cobalt nitrate hexahydrate and CTAB (cetyltrimethyl ammonium bromide), transferring the product into a high-pressure reaction kettle, and keeping the state for 8h-12h at the temperature of 150DEG C-170DEGC to obtain a black blocky composite material; wherein the polyionic liquid is specifically poly[Dbz-mim]cl. The electro-catalytic composite material synthesized by the method provided by the invention has good oxygen reduction catalytic activity. The initial potential and the half-wave potential of the composite material are 0.85V and 0.71V respectively and are close to 0.95V and 0.81V of commercial platinum-carbon, and the composite material has high limiting current density.

Description

technical field [0001] The invention belongs to the technical field of nickel foam composite materials, in particular to a nickel foam composite material functionalized with polyionic liquid, more specifically to a method for preparing a nickel foam composite material loaded with cobalt nitrogen and polyionic liquid functionalized and used for oxygen reduction React application. Background technique [0002] With the advent of the global energy crisis and the increasing environmental pollution and greenhouse effect caused by the burning of fossil fuels, the development of clean energy is imminent. People are paying more and more attention to the storage and conversion of sustainable energy, and fuel cells, as one of the most promising clean energy converters, have high research value. In a fuel cell, fuel is oxidized at the anode, and the released electrons are transferred through an external circuit to the cathode, where oxygen is reduced. However, due to the oxygen reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9041H01M4/9075H01M2004/8689Y02E60/50
Inventor 张文林杨德新王磊郭江怡杨双丞张永康于丰收李春利
Owner HEBEI UNIV OF TECH
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