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Method for preparing high-conductivity porous copper foil based on brass strip

A brass strip and high-conductivity technology, which is applied in the field of preparing high-conductivity porous copper foil based on brass strip, can solve problems such as the inability to improve the conductivity of brass, and achieve the effects of improving surface gloss, reducing costs, and improving conductivity

Active Publication Date: 2020-01-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In short, the above methods still cannot improve the conductivity of brass to a level close to that of copper.

Method used

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  • Method for preparing high-conductivity porous copper foil based on brass strip
  • Method for preparing high-conductivity porous copper foil based on brass strip
  • Method for preparing high-conductivity porous copper foil based on brass strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select the brass strip of model H64, use ethanol or acetone, hydrochloric acid or sulfuric acid with a concentration of 0.1-2 mol / L as the cleaning agent, and clean the brass surface in sequence, such as degreasing and derusting, and then clean the brass surface and clean it. Dry and set aside. The above samples were chemically modified using sodium borohydride aqueous solution with a concentration of 1 mol / L as a reducing agent, and the chemical treatment time was 15 minutes. After chemical modification, the sample surface was blown dry with nitrogen flow. The sample was annealed under a certain temperature program. First, the heating rate was 10 °C / min, the heat treatment temperature was 600 °C, and the heat treatment time was 30 min. Then the heating rate was 5 °C / min, and the heat treatment temperature was 800 °C. The time is 30 minutes. During the whole annealing heat treatment, the protective gas used is nitrogen. The cooling method after annealing heat treatme...

Embodiment 2

[0033] Select the brass strip of model H64, use ethanol or acetone, hydrochloric acid or sulfuric acid with a concentration of 0.1-2 mol / L as the cleaning agent, and clean the brass surface in sequence, such as degreasing and derusting, and then clean the brass surface and clean it. Dry and set aside. The above samples were chemically modified by using sodium borohydride aqueous solution with a concentration of 0.5 mol / L as a reducing agent, and the chemical treatment time was 30 minutes. After chemical modification, the sample surface was blown dry with nitrogen flow. The sample was annealed under a certain temperature program. First, the heating rate was 15 °C / min, the heat treatment temperature was 500 °C, and the heat treatment time was 60 min. Then, the heating rate was 10 °C / min, and the heat treatment temperature was 700 °C. The time is 60 minutes. During the entire annealing heat treatment, the protective gas used is high-purity argon. The cooling method after annea...

Embodiment 3

[0035]Select the brass strip of model H64, use ethanol or acetone, hydrochloric acid or sulfuric acid with a concentration of 0.1-2 mol / L as the cleaning agent, and clean the brass surface in sequence, such as degreasing and derusting, and then clean the brass surface and clean it. Dry and set aside. The above samples were chemically modified by using sodium borohydride aqueous solution with a concentration of 1 mol / L as a reducing agent. The chemical treatment time is 15min. After chemical modification, the sample surface was blown dry with nitrogen flow. The sample was electrochemically treated at a certain potential and current, the electrolyte used was phosphoric acid with a concentration of 2 mol / L, the potential range was 1-30 V, the current range was 0.1-10 mA, and the treatment time was 15 min. The surface of the sample is mechanically treated to mechanically polish the surface of the sample to obtain the final treated copper foil. After testing, compared with the o...

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Abstract

The invention relates to a method for preparing a high-conductivity porous copper foil based on a brass strip. The method comprises the following steps that firstly, the surface of the brass strip iscleaned, then the surface of the brass is treated by using an aqueous solution of sodium borohydride, high-temperature annealing treatment or normal-temperature electrochemical treatment is conductedon the brass at a certain temperature to completely or partially remove zinc in the brass, and finally the high-conductivity porous copper foil is obtained. Compared with an original brass strip, theconductivity of the porous copper foil is increased by 60% or above. The method can prepare the porous and high-conductivity copper foil, and can be applied to the direction of electrical equipment such as a battery current collector, a wire and cable shielding layer, a circuit board line and the like.

Description

technical field [0001] The invention relates to the field of processing non-ferrous metals and alloy materials, in particular to a method for preparing high-conductivity porous copper foil based on a brass strip, and a product obtained by the method and its application. Background technique [0002] With the rapid development of electronic technology, copper has been widely used as a good conductive material in many fields, such as printed circuit boards, supercapacitors and lithium-ion battery current collectors, power transmission wires and other industries. Copper has excellent electrical conductivity and good mechanical strength, and is one of the most excellent and widely used conductive materials. However, the high price of copper has become one of the main factors restricting its large-scale application under the current situation of large-scale demand for conductive materials such as printed circuit boards. [0003] At present, brass is about two-thirds of the price...

Claims

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Application Information

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IPC IPC(8): C22F1/08C22F1/02C25F3/02
CPCC22F1/02C22F1/08C25F3/02
Inventor 刘景军李团锋娄益玮王峰
Owner BEIJING UNIV OF CHEM TECH
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