Nickel-plated copper material and preparation method and application thereof

A nickel-plated copper and nickel-plated technology, which is applied to electrical components, circuits, battery pack components, etc., can solve the problems that cannot meet the requirements of high-rate lithium-ion battery negative electrode tabs, reduce the corrosion resistance of materials, and have no clear indications, etc. , to achieve the effective recovery of metal ion concentration, enhance the bonding strength, and improve the corrosion resistance of electrolyte

Active Publication Date: 2015-11-18
HUNAN YONGSHENG NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention patent CN102330124A relates to a pulse electrochemical deposition and tissue adjustment process of nickel-plated copper strip. The cold rolling process is easy to cause damage to the nickel coating due to physical damage, reducing the corrosion resistance of the material; the invention patent CN101245480A discloses a method for preparing a nickel coating on the metal surface. On the tin layer, after the nickel layer is plated, potassium dichromate passivation, hydrogen removal heat treatment and high temperature annealing diffusion heat treatment are used. A large number of experiments have shown that the nickel coa

Method used

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  • Nickel-plated copper material and preparation method and application thereof
  • Nickel-plated copper material and preparation method and application thereof
  • Nickel-plated copper material and preparation method and application thereof

Examples

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Example Embodiment

[0068] Example 1

[0069] The preparation method of nickel-plated copper material of the present invention is used for high-rate lithium-ion battery tab material. Semi-hard pure copper is used as the base material. The low-current electrodeposition thickness is 0.4 μm on both sides of the substrate. The grain size is 50-100 nm. The dark nickel coating is then electro-deposited on the dark nickel coating with a thickness of 1.4μm and a high solderability nickel coating with a grain size of 0.4~1.0μm. Finally, the material is heat treated in a reducing atmosphere at 550°C for 2h and removed at 200°C for 4h. Hydrogen heat treatment process to form a 0.3μm copper-nickel alloy layer.

Example Embodiment

[0070] The specific implementation includes the following steps:

[0071] (1) Pre-treatment: The pure copper strip is subjected to ultrasonic degreasing, electric degreasing and activation treatment. The ultrasonic degreasing temperature is 45℃, the ultrasonic frequency is 20kHz, the degreasing time is 1min, the degreasing liquid formula is sodium carbonate 30g / L, trisodium phosphate 20g / L, and sodium hydroxide 30g / L. Electrolytic oil temperature is 55℃, current density is 5A / dm 2 , Degreasing time 1.5min, degreasing formula sodium carbonate 30g / L, trisodium phosphate 20g / L, sodium hydroxide 30g / L. The sulfuric acid concentration of the activation treatment is 8%, the solution temperature is 25°C, and the treatment is about 1 min.

[0072] (2) Electrodeposited nickel coating: including electrodeposited dark nickel layer and electroplated high solderability nickel coating. The dark nickel solution formula is nickel sulfate 300g / L, nickel chloride 40g / L, boric acid 40g / L, the bath ...

Example Embodiment

[0084] Example 2

[0085] The preparation method of nickel-plated copper material of the present invention is used for high-rate lithium-ion battery tab materials, using soft pure copper as the base material, and low-current electrodeposition on both sides of the substrate with a thickness of 0.2 μm and a grain size of 50-100 nm Dark nickel plating, and then electrodepositing a high solderability nickel plating with a thickness of 1μm and a grain size of 0.4~1.0μm on the dark nickel layer. Finally, the material is subjected to 2.5h 650℃ reducing atmosphere heat treatment and 260℃4h to remove hydrogen Heat treatment process to form a 0.5μm copper-nickel alloy layer.

[0086] The specific implementation includes the following steps:

[0087] (1) Pre-treatment: The pure copper strip is subjected to ultrasonic degreasing, electric degreasing and activation treatment. The ultrasonic degreasing temperature is 50℃, the ultrasonic frequency is 30kHz, the degreasing time is 1min, the degrea...

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Abstract

The invention relates to a nickel-plated copper material and a preparation method and application thereof, and belongs to the technical field of battery manufacturing. The nickel-plated copper material sequentially comprises fine copper, a copper-nickel alloy layer, a dull nickel layer and a high-weldability nickel layer from inside to outside. The thickness of the copper-nickel alloy layer ranges from 0.2 micrometer to 0.6 micrometer. The thickness of the dull nickel layer ranges from 0.2 micrometer to 0.6 micrometer. The thickness of the high-weldability nickel layer ranges from 0.6 micrometer to 2.6 micrometers. The preparation method includes the steps that the activated fine copper serves as a base material; firstly, low current is supplied by a pulse power source to electrically deposit the dull nickel layer; then, direct current nickel plating at high current density is conducted in an electrolyte with high-weldability nickel plating additives; and after electroplating is finished, in combination with annealing treatment and dehydrogenation thermal treatment matched with the electroplating process, the nickel-plated copper material which is strong in coating binding force, resistant to corrosion and folding and easy to weld is obtained. When the prepared nickel-plated copper material is used for nickel-plated copper strip electrode tabs of large-magnifying-power lithium ion batteries, the performance of the electrode tabs are far superior to the performance of similar products. The preparation process is simple and controllable, and industrial production is conveniently achieved.

Description

technical field [0001] The invention relates to a nickel-plated copper material and a preparation method and application thereof, belonging to the technical field of battery manufacturing. Background technique [0002] At present, it is difficult for commercial lithium-ion batteries to achieve continuous discharge at a rate above 20C. The main reason is that when the battery is discharged at a high rate, the tabs heat up severely, and the overall temperature of the battery is too high, which makes the battery prone to thermal runaway, which leads to the battery rate. Discharge performance and cycle performance deteriorate. Conventional lithium-ion battery manufacturers use nickel lugs for the negative electrode, which has poor conductivity, with a conductivity of 1.4×10 5 S / cm, the positive electrode uses aluminum lugs, and its conductivity is 3.69×10 5 S / cm. During high-rate discharge, due to the low electrical conductivity and poor thermal conductivity of the negative t...

Claims

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Application Information

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IPC IPC(8): C25D5/14C25D5/50C25D5/18C25D3/12C25D7/06H01M2/26H01M50/534
CPCY02E60/10
Inventor 尹业文田槟铖杨阳阳周亮窦坤鹏罗凌云
Owner HUNAN YONGSHENG NEW MATERIALS
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