Preparation method of sulfur-doped cobalt oxide and sulfur, nitrogen and oxygen-doped carbon in-situ composite electrode

An in-situ composite and cobalt oxide technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problem of expensive rare metal materials

Active Publication Date: 2019-04-05
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, rare metal materials such as yttrium and ruthenium are expensive, and their overpotentials for catalyzing the OER reaction are generally greater than 300 mV, which still need to be optimized.

Method used

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  • Preparation method of sulfur-doped cobalt oxide and sulfur, nitrogen and oxygen-doped carbon in-situ composite electrode
  • Preparation method of sulfur-doped cobalt oxide and sulfur, nitrogen and oxygen-doped carbon in-situ composite electrode
  • Preparation method of sulfur-doped cobalt oxide and sulfur, nitrogen and oxygen-doped carbon in-situ composite electrode

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Experimental program
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Embodiment 1

[0024] Electrodeposition was performed on carbon paper at room temperature with a cobalt nitrate concentration of 150 mM at a potential of −1.0 V for 90 s. After deposition, rinse repeatedly with deionized water and dry on a hot stage at 80°C for 10 min. Put the carbon paper deposited with sheet-like cobalt hydroxide arrays into a tube furnace, anneal in air at 400°C for 30 min, and cool naturally to room temperature. Take out the porous sheet-shaped cobalt oxide array in-situ electrode grown on the carbon paper. Tx-100 and thiourea were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, in which the amount of Tx-100 was 1.0 mL, and the concentration of thiourea was 2000 mM. Soak the porous cobalt oxide array in-situ electrode grown on carbon paper for 30 min, take it out, dry it on a hot stage at 80°C for 10 min, and then evenly drop the precursor solution on the carbon paper , and then continue to dry for 30 min. Put the coated carbon paper ...

Embodiment 2

[0030]Electrodeposition was performed on carbon paper at room temperature with a cobalt nitrate concentration of 150 mM at a potential of −1.2 V for 90 s. After deposition, rinse repeatedly with deionized water and dry on a hot stage at 80°C for 10 min. Put the carbon paper deposited with sheet-like cobalt hydroxide arrays into a tube furnace, anneal in air at 400°C for 30 min, and cool naturally to room temperature. Take out the porous sheet-shaped cobalt oxide array in-situ electrode grown on the carbon paper. Tx-100 and thiourea were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, in which the amount of Tx-100 was 1.0 mL, and the concentration of thiourea was 2000 mM. Soak the porous cobalt oxide array in-situ electrode grown on carbon paper for 30 min, take it out, dry it on a hot stage at 80°C for 10 min, and then evenly drop the precursor solution on the carbon paper , and then continue to dry for 30 min. Put the coated carbon paper i...

Embodiment 3

[0033] Electrodeposition was performed on carbon paper at room temperature with a cobalt nitrate concentration of 150 mM at a potential of −1.0 V for 180 s. After deposition, rinse repeatedly with deionized water and dry on a hot stage at 80°C for 10 min. Put the carbon paper deposited with sheet-like cobalt hydroxide arrays into a tube furnace, anneal in air at 400°C for 30 min, and cool naturally to room temperature. Take out the porous sheet-shaped cobalt oxide array in-situ electrode grown on the carbon paper. Tx-100 and thiourea were dissolved in 2.0 mL N,N-dimethylformamide solution to obtain a precursor solution, in which the amount of Tx-100 was 1.0 mL, and the concentration of thiourea was 1000 mM. Soak the porous cobalt oxide array in-situ electrode grown on carbon paper for 30 min, take it out, dry it on a hot stage at 80°C for 10 min, and then evenly drop the precursor solution on the carbon paper , and then continue to dry for 30 min. Put the coated carbon paper...

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Abstract

The invention provides a preparation method of a bifunctional sulfur-doped cobalt oxide and sulfur, nitrogen and oxygen doped carbon in-situ composite electrode. Electro-deposition and air atmosphereannealing are used to prepare a sheet-like cobalt oxide array in-situ electrode. A forehead fluid containing thiourea and triton is loaded onto the surface of the cobalt oxide array in-situ electrode,dried and then annealed under a protective atmosphere. The product obtained by the technical scheme of the present invention has an excellent dual-function catalytic function of oxygen evolution reaction and oxygen reduction reaction, and owning a variety of high electro-catalytic active sites, including sulfur, nitrogen, oxygen doped active sites in carbon materials, other consequent lattice defects, a strong coupling interface between carbon materials and cobalt oxide, defect sides caused by sulfur-doped cobalt oxide, etc. are constructed. The excellent dual-function electrocatalyst has potential for application to 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] With the rapid development of economy and society, the contradiction between energy demand and environmental problems is becoming more and more intense. Efficient and clean energy conversion and storage will effectively alleviate this contradiction. Recently, electrocatalysts play an increasingly important role in the field of energy conversion and storage and become a research hotspot. For example, the ability to electrocatalyze oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) will play a crucial role in renewable energy platforms, which can be used in fuel cells and metal-air batteries. Currently, developing a practical, economically viable, highly stable, and performance-enhanced electrocatalyst remains a major task. Platinum and its derivatives are by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8807H01M4/8882H01M4/9016H01M4/9083Y02E60/50
Inventor 黄妞杨柳闫术芳丁玉岳
Owner CHINA THREE GORGES UNIV
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