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A nickel-iron/carbon film-nickel integrated composite electrode and its preparation method

A composite electrode and carbon film technology, which is applied in the direction of electrodes, battery electrodes, circuits, etc., can solve the problems of unfavorable growth of metal catalyst particles and low hydrophilicity, so as to improve hydrophilicity and electrical conductivity, improve electrochemical performance and Stability, easy anchoring effect

Active Publication Date: 2022-03-22
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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  • A nickel-iron/carbon film-nickel integrated composite electrode and its preparation method
  • A nickel-iron/carbon film-nickel integrated composite electrode and its preparation method
  • A nickel-iron/carbon film-nickel integrated composite electrode and its preparation method

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

A nickel-iron / carbon film-nickel integrated composite electrode and a preparation method thereof belong to the technical field of nanometer catalytic electrodes. The present invention successfully prepares an integrated composite electrode (nickel-iron / carbon film-nickel) composed of nickel-iron and nickel-modified carbon nanotube film by using electrodeposition technology. The introduction of nickel particles greatly improved the hydrophilicity and electrical conductivity of the carbon nanotube film surface, and further induced the uniform distribution of nickel-iron nanoparticles on the surface of carbon nanotube bundles. The obtained nickel-iron / carbon film-nickel integrated composite electrode It has excellent oxygen evolution performance and stability. The nickel-iron / carbon film-nickel integrated composite electrode involved in the invention has the advantages of flexibility, light weight, no binder, etc., and can be widely used in related electrochemical fields such as portable energy storage and conversion devices.

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 Patents(China)
IPC IPC(8): H01M4/90H01M4/88C23C28/00C23C16/26C25D3/12C25D3/56C25B11/089C25B1/04C25B11/054C25B11/055B82Y30/00B82Y40/00
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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