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Ferronickel/carbon film-nickel integrated composite electrode and preparation method thereof

A composite electrode, carbon film technology, applied in electrodes, battery electrodes, circuits, etc., can solve the problems of unfavorable growth of metal catalyst particles, low hydrophilicity, etc., to improve hydrophilicity and electrical conductivity, improve electrochemical performance and Stability and good hydrophilicity

Active Publication Date: 2021-04-23
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low hydrophilicity of the carbon substrate in aqueous solution is not conducive to the growth of metal catalyst particles on its surface by the liquid phase method.

Method used

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  • Ferronickel/carbon film-nickel integrated composite electrode and preparation method thereof
  • Ferronickel/carbon film-nickel integrated composite electrode and preparation method thereof
  • Ferronickel/carbon film-nickel integrated composite electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepared by vapor deposition method with a certain thickness (0.5 μm) and area (4 cm -2 ) of the carbon film.

[0023] (2) Electrodeposition is used to deposit nickel-iron bimetal on one side of the carbon film. Preparation of electrodeposition solution: 2.1 g L -1 Nickel sulfate, 2.2 g L -1 Ferric sulfate, 3.3 g L -1 Ammonium sulfate, use 0.5 mol L -1 Sulfuric acid adjusted the pH of the solution to 4. Electrodeposition was performed in a three-electrode system on an electrochemical workstation. The platinum sheet electrode was used as the counter electrode, the saturated calomel electrode was used as the reference electrode, and the carbon film was used as the working electrode. The electrodeposition voltage was -1.7 V, and the electrodeposition time was 400 s. The composite film is taken out and dried to obtain a nickel-iron / carbon film integrated composite electrode (NiFe / CMF). (this material is used as a comparison sample)

Embodiment 2

[0025] (1) Prepared by vapor deposition method with a certain thickness (0.5 μm) and area (3 cm -2 ) of the carbon film.

[0026] (2) Metal nickel is electrodeposited on one side of the carbon film by electroplating. Preparation of electroplating solution: 270 g L -1 Nickel sulfate, 50 g L -1 Sulfuric acid, 70 g L -1 Nickel chloride, 2 g L -1 C 12 h 25 NaO 4 S. The contact area between the carbon film and the electrolyte is 0.2 mAcm -2 . The negative electrode of the power supply is connected to the carbon film, the positive electrode is connected to the nickel plate, the voltage is 3 V, and the current is 2 A dm -2 , the plating time is 10 s. Take out the carbon film-nickel composite film and dry it. (3) Electrodeposition is used to deposit nickel-iron bimetal on the other side of the carbon film-nickel composite film. Preparation of electrodeposition solution: 2.1 g L -1 Nickel sulfate, 2.2 g L -1 Ferric sulfate, 3.3 g L -1 Ammonium sulfate, use 0.5 mo...

Embodiment 3

[0028] (1) Prepared by vapor deposition method with a certain thickness (0.2 μm) and area (2 cm -2 ) of the carbon film.

[0029] (2) Metal nickel is electrodeposited on one side of the carbon film by electroplating. Preparation of electroplating solution: 270 g L -1 Nickel sulfate, 50 g L -1 Sulfuric acid, 70 g L -1 Nickel chloride, 2 g L -1 C 12 h 25 NaO 4 S. The contact area between the carbon film and the electrolyte is 0.2 mAcm -2 . The negative electrode of the power supply is connected to the carbon film, the positive electrode is connected to the nickel plate, the voltage is 3 V, and the current is 2 A dm -2 , the plating time is 20 s. Take out the carbon film-nickel composite film and dry it. (3) Electrodeposition is used to deposit nickel-iron bimetal on the other side of the carbon film-nickel composite film. Preparation of electrodeposition solution: 2.1 g L -1 Nickel sulfate, 2.2 g L -1 Ferric sulfate, 3.3 g L -1 Ammonium sulfate, use 0.5 mo...

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Abstract

The invention discloses a ferronickel / carbon film- nickel integrated composite electrode and a preparation method thereof, and belongs to the technical field of nano catalytic electrodes. The invention successfully prepares an integrated composite electrode (ferronickel / carbon film-nickel) composed of ferronickel and a nickel-modified carbon nanotube film by using an electrodeposition technology. The introduction of the nickel particles greatly improves the hydrophilicity and conductivity of the surface of the carbon nanotube film, the uniform distribution of the ferronickel nanoparticles on the surface of the carbon nanotube bundle is further induced, and the obtained ferronickel / carbon film-nickel integrated composite electrode has excellent oxygen evolution performance and stability. The ferronickel / carbon film-nickel integrated composite electrode has the advantages of flexibility, light weight, no binder and the like, and can be widely applied to the related electrochemical fields of portable energy storage and conversion devices and the like.

Description

technical field [0001] The invention belongs to the field of nanometer catalytic electrode materials, in particular to a method for preparing a nickel-iron / carbon film-nickel integrated composite electrode. Background technique [0002] The traditional method of preparing electrode materials generally uses polymeric binders (such as perfluorosulfonic acid (Nafion), polytetrafluoroethylene (PTFE)) to bond catalytically active materials and conductive substrates together. However, the polymer binder inevitably reduces the intrinsic activity and durability of the catalyst, which is mainly due to the high contact resistance and easy desorption of the binder during the electrocatalysis process. So far, some new studies have found that catalytically active substances can be anchored on conductive substrates (such as metal foams, metal foils, and carbon-based nanomaterials) by in-situ growth, which can be directly used as integrated electrodes without adding additional polymeric bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88C23C28/00C23C16/26C25D3/12C25D3/56C25B1/04C25B11/04B82Y30/00B82Y40/00
CPCH01M4/9041H01M4/8803H01M4/8817H01M4/8853C23C28/322C23C28/321C23C28/34C23C16/26C25D3/12C25D3/562C25B1/04B82Y30/00B82Y40/00Y02E60/36Y02E60/50
Inventor 尹艳红文敏吴子平黎业生刘先斌邓朋张克湛钦淇高文静
Owner JIANGXI UNIV OF SCI & TECH
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