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Electrodepositing thick-scale foam nickel and preparation method thereof

A technology of electrodeposition and nickel foam, which is applied in the direction of electroforming and electrolysis, can solve the problems affecting the uniformity of performance, the DTR value is less than 1.5, and the dispersion ability of the electrolyte is not strong, so as to improve the conductivity and dispersion ability , cost reduction effect

Inactive Publication Date: 2017-06-06
CHANGDE LYRUN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The framework of the pores is uniform due to its predecessor being a polyurethane sponge, but due to the difference in the quality of the electrodeposited metal, the foamed nickel framework metal has different thicknesses, which seriously affects the uniformity of performance
For thick-scale nickel foam, if the thickness is greater than 10mm, the current electrodeposition technology, due to the weak dispersion ability of the electrolyte used, it is difficult to make the DTR value less than 1.5. Therefore, it is necessary to develop a new electrolyte and cooperate with other Control of process parameters to prepare thick-scale nickel foam with uniform metal mass distribution, providing new ideas for the development of foam nickel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 60ppi foam is used as the base material, and its structural characteristics are: the thickness is 20mm, and the measured pore radius is 100-250um. After the substrate is pretreated by conventional methods in this field, it is coated with graphite conductive adhesive, dried and then electrodeposited—the electrolyte contains 20g / L NiSO 4 , 20g / L H 3 B0 3 , 90g / L NaCl; the electrodeposition process parameters are a temperature of 15°C and a current density of 0.04A / dm 2 , PH3.5, electroplating 90h.

[0011] Reduction sintering was carried out after electrodeposition of nickel to obtain a sample. The measured thickness of the sample was about 23 mm, and the DTR value of the mass distribution of electrodeposited foamed nickel was 1.19.

Embodiment 2

[0013] Adopt 60ppi foamed plastics as base material, its structural feature is: thickness 25mm, through measuring pore radius 100~250um. After the substrate is pretreated by conventional methods in this field, it is then coated with graphite conductive adhesive, observed under an electron microscope, and then electrodeposited after drying—the electrolyte contains 30g / L NiSO 4 , 25g / L H 3 B0 3 , 100g / L NaCl ; Electrodeposition process parameters are temperature 20°C, current density 0.02A / dm 2 , PH3.5, electroplating 90h.

[0014] Electrodeposition of nickel was followed by reduction sintering to obtain a sample. The sample was observed with an electron microscope and the thickness was measured to be about 21nun. The DTR value of the mass distribution of nickel electrodeposited foam was detected to be 1.15.

Embodiment 3

[0016] Adopt 60ppi foam plastics as base material, its structural feature is: thickness 27mm, through measuring pore radius 100~250um. After the substrate is pretreated by conventional methods in this field, it is coated with graphite conductive adhesive, observed by electron microscope, and then electrodeposited after drying—the electrolyte contains 30g / L NiSO 4 , 100g / L NaCl ; Electrodeposition process parameters are temperature 22°C, current density 0.02A / dm 2 , PH4.0, electroplating 90h.

[0017] Electrodeposition of nickel was followed by reduction and sintering to obtain a sample. The sample was observed with an electron microscope and the thickness was measured to be about 23mm. The DTR value of the electrodeposited foam nickel mass distribution is 1.20.

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Abstract

The present invention discloses an electrodepositing thick-scale foam nickel and a preparation method thereof, wherein the nickel thickness of the foam nickel is 20-30 mm, and DTR is 1.0-1.5. According to the present invention, based on the mature Watts solution and the analysis of the actions of various components, the main salt NiS04 content is significantly reduced and NaCl is separately adopted as the electric conduction salt and the anode activator, such that the conductivity of the solution is remarkably improved due to the reduction of the main salt content, the dispersibility of the electrolyte is remarkably improved, and the cost of the electrolyte is reduced; and by using the high chloride type electrolyte and by matching with the control of other process parameters, the high porosity foam nickel with the thickness of more than 20 mm and the DTR of less than 1.5 can be prepared.

Description

technical field [0001] The invention relates to the preparation of electrodeposited foamed metal, and in particular provides an electrodeposited thick-scale foamed nickel and a preparation method thereof. Background technique [0002] High-porosity foam metal nickel is a high-tech product first developed by the American ELTECH SYSTEM company in the early 1990s. It is obtained by using polyurethane sponge with a three-dimensional network structure as the substrate, conducting metal electrodeposition after conductive treatment, and performing metallurgical reduction treatment after plating. Due to the uniform structure of three-dimensional mesh openings and large specific surface area, it is widely used as electrode substrate materials for various fuel cells and batteries. [0003] At present, there are many patents on the preparation technology of this product, but they mainly focus on the thin scale, such as the production and preparation of nickel foam with a thickness of ...

Claims

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Application Information

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IPC IPC(8): C25D3/12C25D5/56C25D1/08
CPCC25D3/12C25D1/08C25D5/56
Inventor 易秋珍余兴华钟建夫朱济群
Owner CHANGDE LYRUN MATERIAL