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Ultra-low surface density and high open porosity foam nickel and production method thereof

A production method and surface density technology, applied in the direction of electrolysis, electroforming, etc., can solve the problems of difficulty in adapting to the development needs of power batteries and low porosity, so as to improve battery performance, reduce surface density, and reduce material costs. Effect

Inactive Publication Date: 2017-05-31
CHANGDE LYRUN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary nickel foam is used as the current collector of the battery electrode and the carrier of the active material. When making the battery electrode plate, these gaps can be used to make full use of the active material of the plate, increase the reaction area, reduce the internal resistance, and improve the performance of the battery. However, the areal density of ordinary nickel foam currently produced is 250 g / m 2 Above, there are obvious differences in vertical and horizontal directions, and the opening rate is low, which makes it difficult to increase the filling amount of battery active materials and improve the quality of batteries, and it is difficult to adapt to the development needs of power batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take two rolls of continuous polyurethane foam (thickness 1.6mm, width 1000mm) of 50m each, one roll is marked as I, the other roll is marked as II after hole carding, and I and II are subjected to vacuum sputtering conductive treatment by the same process , Magnetron vacuum sputtering process parameters: control sputtering energy 6~13kw, continuous sputtering speed 0.3~8 m / min, sputtering guaranteed bottom vacuum degree (0.3~3.0) X10 -2 Pa, vacuum degree (1~4) X10 when filled with argon gas for sputtering -1 Pa, then put I and II in the electrolytic cell for common nickel foam, electrodeposit under the same process conditions, and deposit 280 g / m 2 Terminate the electrodeposition, then heat treat I and II under the same conditions, and its process parameters are: oxidation temperature 600~650°C, residence time 15min, reduction temperature 800~1000°C, residence time 40min, decomposition gas flow rate 25 m 3 / h. I is ordinary nickel foam, and II is the nickel foam wit...

Embodiment 2

[0025] As described in Example 1, only change the electrodeposited areal density of Volume II to 150g / m 2 , other process conditions remain unchanged. Get the nickel foam II that the above-mentioned present invention obtains and common nickel foam I to do physical and chemical property test, the result is as shown in table 2.

[0026] Table 2

[0027] performance I II Thickness (mm) 1.6 1.6 PPI 95 120 Surface density (g / m 2 )

280 150 Longitudinal tensile strength (N / cm 2 )

80 85 Transverse tensile strength (N / cm 2 )

60 85 Flexibility (times) 6 7 nickel(%) 99. 6 99.6 Iron (ppm) 75 75 Copper (ppm) 8 8 Manganese (ppm) 42 42 Sulfur (ppm) 28 28 Carbon (ppm) 85 85

[0028]

[0029] As can be seen from Table 2, adopt the foamed nickel that the present invention makes, when its areal density is far lower than common foamed nickel, its mechanical strength is s...

Embodiment 3

[0031] As described in Example 1, change the thickness of the second roll of polyurethane foam to 1mm, and the surface density of electrodeposition is 150g / m 2 , other process conditions remain unchanged. The physical and chemical properties of nickel foam II and common nickel foam I obtained in the present invention were tested, and the results are shown in Table 3.

[0032] table 3

[0033] performance I II Thickness (mm) 1.6 1.0 PPI 95 140 Surface density (g / m 2 )

280 150 Longitudinal tensile strength (N / cm 2 )

80 90 Transverse tensile strength (N / cm 2 )

60 90 Flexibility (times) 6 8 nickel(%) 99.6 99.6 Iron (ppm) 75 75 Copper (ppm) 8 8 Manganese (ppm) 42 42 Sulfur (ppm) 28 28 Carbon (ppm) 85 85

[0034]

[0035] As can be seen from Table 3, adopt the foamed nickel that the present invention makes, when its areal density and thickness are all lower...

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Abstract

The present invention discloses an ultra-low surface density and high open porosity foam nickel and a production method thereof. According to the production method, polyurethane sponge is adopted as a matrix, the method comprises matrix electric conduction treatment, electrodeposition nickel plating and heat treatment under a hydrogen atmosphere, and a polyurethane sponge pore shape combing process is additionally set before the matrix electric conduction treatment. According to the present invention, the pore shape combing process is additionally set before the polyurethane sponge electric conduction treatment so as to change the original structure of the sponge pore shape, increase the open porosity of the sponge, and eliminate the vertical and horizontal difference; and with the application of the polyurethane sponge as the matrix to prepare the foam nickel, various physical properties are significantly improved, and the produced foam nickel can be used for improving the battery performance of high-end products and reducing the material cost of low-end products, and can further be used for producing the high-capacity power battery.

Description

technical field [0001] The invention relates to a manufacturing method of foamed nickel, in particular to a foamed nickel with ultra-low surface density and high porosity and a manufacturing method thereof. Background technique [0002] Ordinary foamed nickel material (such as: sponge-like nickel foamed material) is a porous metal nickel stencil, which is a material used to make battery electrodes. The basic production process mainly includes: firstly, the polyurethane foam is conductive, and then Electrodeposition is performed, and a final heat treatment removes the foam matrix and changes the crystal structure of the nickel. Among them, conductive treatment generally includes electroless plating, coating of conductive glue and vacuum plating. Electrodeposition is nickel plating in nickel salt, and heat treatment is carried out at high temperature in a reducing atmosphere. Ordinary nickel foam is used as the current collector of the battery electrode and the carrier of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/08
CPCC25D1/08
Inventor 余兴华易秋珍钟建夫朱济群
Owner CHANGDE LYRUN MATERIAL