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A kind of preparation method of copper, cobalt nitride and carbon in-situ composite electrode

An in-situ composite and cobalt nitride technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high price and promotion

Active Publication Date: 2021-06-18
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, yttrium and ruthenium are rare metal materials, which are expensive, and their overpotentials for catalyzing OER reactions are generally greater than 300 mV, and their performance still needs to be improved for practical use.

Method used

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  • A kind of preparation method of copper, cobalt nitride and carbon in-situ composite electrode
  • A kind of preparation method of copper, cobalt nitride and carbon in-situ composite electrode
  • A kind of preparation method of copper, cobalt nitride and carbon in-situ composite electrode

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Experimental program
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Effect test

Embodiment 1

[0018] Electrodeposition was carried out in cobalt nitrate·hexahydrate and copper acetate·monowater solution at room temperature, in which the concentration of cobalt nitrate·hexahydrate was 75 mM, and the concentration of copper acetate·monohydrate was 75 mM, the voltage was -1.0 V, and the time was 180 s. Afterwards, rinse repeatedly with deionized water and dry at 80°C for 10 minutes on a hot table. Put the deposited carbon paper into a tube furnace, react at 400°C for 30 minutes under Air flow, and take it out after natural cooling to room temperature to form porous, needle-like oxidation Cobalt, copper oxide arrays. Tx-100 and dicyandiamide were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, wherein the amount of Tx-100 was 1.0 mL, and the concentration of dicyandiamide was 2000 mM. Soak the formed porous, needle-like cobalt oxide and copper oxide arrays in the precursor solution for 30 minutes, take it out, dry it on a hot table at 80...

Embodiment 2

[0021] Electrodeposition was carried out in cobalt nitrate hexahydrate and copper acetate monohydrate at room temperature, wherein the concentration of cobalt nitrate hexahydrate was 100 mM, and the concentration of copper acetate monohydrate was 50 mM, the voltage was -1.0 V, and the time was 180 s. Afterwards, rinse repeatedly with deionized water and dry at 80°C for 10 minutes on a hot table. Put the deposited carbon paper into a tube furnace, react at 400°C for 30 minutes under Air flow, and take it out after natural cooling to room temperature to form porous, needle-like oxidation Cobalt, copper oxide arrays. Tx-100 and dicyandiamide were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, wherein the amount of Tx-100 was 1.0 mL, and the concentration of dicyandiamide was 2000 mM. Soak the formed porous, needle-like cobalt oxide and copper oxide arrays in the precursor solution for 30 minutes, take it out, dry it on a hot table at 80°C for ...

Embodiment 3

[0028]Electrodeposition was carried out in cobalt nitrate hexahydrate and copper acetate monohydrate at room temperature, in which the concentration of cobalt nitrate hexahydrate was 112.5 mM, the concentration of copper acetate monohydrate was 37.5 mM, the voltage was -1.0 V, and the time was 180 s. After that, rinse repeatedly with deionized water and dry on a hot stage at 80°C for 10 min. Put the deposited carbon paper into a tube furnace, react at 400°C for 30 min under Air flow, and take it out after natural cooling to room temperature to form a porous, needle-shaped Cobalt oxide, copper oxide arrays. Tx-100 and dicyandiamide were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, wherein the amount of Tx-100 was 1.0 mL, and the concentration of dicyandiamide was 2000 mM. Soak the formed porous, needle-like cobalt oxide and copper oxide arrays in the precursor solution for 30 minutes, take it out, dry it on a hot table at 80°C for 10 minut...

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Abstract

The invention provides a method for preparing a double-functional in-situ composite electrode of copper, cobalt nitride and carbon. Electrodeposition and air atmosphere annealing are used to prepare needle-shaped cobalt oxide and copper oxide array in-situ electrodes. The common precursor solution or polyaniline is loaded onto the surface of the needle-like cobalt oxide and copper oxide array in-situ electrodes, and annealed in a protective atmosphere after drying. The product of the present invention has built a variety of high electrocatalytic active sites, including nitrogen-doped active sites in carbon materials and other lattice defects caused by them, strong coupling interfaces between carbon materials and copper, and cobalt nitride, etc., so that It has excellent electrocatalytic oxygen evolution reaction and oxygen reduction reaction, and this bifunctional electrocatalyst with excellent performance has the prospect of being used in fuel cells and zinc-air batteries.

Description

technical field [0001] The invention relates to an in-situ electrode and its preparation, and belongs to the field of energy storage and conversion materials and devices. Background technique [0002] Recently, electrocatalysts play an increasingly important role in the field of energy conversion and storage and become a research hotspot. For example, electrocatalysts that can catalyze the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play a crucial role in the performance cost of fuel cells and metal-air batteries. Currently, platinum and its derivatives are by far the most effective electrocatalysts for ORR. However, platinum is expensive and inert platinum oxide is easy to form on the surface after long-term working in an alkaline environment. In addition, platinum is easily poisoned by fuel oxidative molecules, such as methanol, and the performance will drop sharply. Yttrium oxide and ruthenium oxide are often used as anodes in electrolysis of wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/8652H01M4/8825H01M4/9041Y02E60/50
Inventor 黄妞杨柳闫术芳丁玉岳
Owner CHINA THREE GORGES UNIV
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