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Method for plating surface of copper nanowire with carbon

A technology of copper nanowire and carbon plating, which is applied in the field of carbon plating on the surface of copper nanowire, multiple integrated carbon plating technology and the preparation of CuNWs/C anti-corrosion coating, which can solve the problem of electronic conductivity, weak mechanical strength, step To achieve the effect of improving performance and service life, high mechanical strength and simple operation

Pending Publication Date: 2021-08-24
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion of the negative electrode current collector of lithium-ion batteries will affect the electronic conductivity between the current collector and the electrode active material, and the contact resistance between the two will increase significantly, thereby reducing the cycle efficiency, specific capacity and life of the battery. Battery storage performance and safety performance
[0003] At present, there are many anti-corrosion coating preparation technologies, which can be roughly divided into wet chemical coating, chemical vapor deposition and physical vapor deposition. However, these technologies have problems such as poor material bonding, difficult control of thickness, and weak mechanical strength. Develop surface coating preparation technology with good adhesion, adjustable thickness, high mechanical strength and uniform smoothness
[0004] After searching, it was found that the patent with the publication number CN111540535A disclosed a method for preparing carbon-coated copper nanowires. The method added organic carbon glucose to the copper nanowire dispersion, reacted for 24 hours under airtight conditions, and went through washing, Drying and other processes, the steps are cumbersome and time-consuming

Method used

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  • Method for plating surface of copper nanowire with carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the copper nanowire thin film of the present embodiment comprises the following steps:

[0029] S1. Weigh 0.964g Cu(NO 3 ) 2 ·3H 2 Add O to 40 mL of ultrapure water, draw 8 mL of ethylenediamine with a needle, and add it to the above Cu(NO 3 ) 2 ·3H 2 In the aqueous solution of O, mix evenly, the solution is dark blue, which is recorded as solution A; weigh 480g NaOH and dissolve it in 800 mL ultrapure water, and place the beaker in an ice-water bath to obtain solution B; add the mixed solution A to the cooling In solution B, stir evenly (about 10min), the solution is uniform and clear dark blue, which is recorded as mixed solution C; pipette 800 μL hydrazine hydrate with a pipette gun, add to the above mixed solution C, and stir until the solution turns light blue (about 10 min), which is recorded as solution D; put solution D in a water bath at 75 °C and let it stand for 1 h to obtain crude CuNWs; filter the obtained crude CuNWs with ult...

Embodiment 2

[0031] The multiple integrated carbon coating device of this embodiment includes the following accessories:

[0032] S2. A multi-component integrated carbon coating device, which is a multi-component device integrating magnetic filtration, arc discharge and plasma.

[0033] Such as figure 1 As shown, the device consists of a magnetic filter elbow 1, a first arc discharge source 2, a second arc discharge source 4, a first solid target 3, a second solid target 5, a chemical vapor reaction chamber 6, and an air inlet 7 , a deposition base 8 , a rotatable base 9 , and an air outlet 10 . figure 1 The shown magnetic filtering and screening arc discharge plasma device includes two or more magnetic filtering bent pipes and one magnetic filtering main line pipe, and can be equipped with more than two arc sources for operation. A deposition substrate 8 is also provided in the chemical vapor reaction chamber 6 , that is, the film deposition chamber. The deposition base 8 is placed on ...

Embodiment 3

[0035] A method for preparing a CuNWs / C anti-corrosion coating in this embodiment comprises the following steps:

[0036] S3. After cleaning the deposition substrate 8, fix it on the rotatable base 9 in the thin film deposition chamber; vacuumize the two arc discharge sources, the two magnetic filter elbows 1 and the thin film deposition chamber, and the vacuum degree reaches 1 ×10 -4 Pa; use plasma to clean the coating surface of the deposition substrate 8 to remove oil and impurities on the coating surface of the deposition substrate 8;

[0037] S4. Introduce the arc discharge carbon source into the magnetic filter elbow 1 for screening, the deposition arc current is 100~120A, the magnetic filter elbow current is 1.6~2.5A, the negative bias voltage is 160~320V, and the deposition time is 10min ;

[0038]S5. Turn off the arc discharge power supply and the magnetic filter power supply, release the vacuum degree, and open the film deposition chamber after returning to the nor...

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Abstract

The invention provides a method for plating the surface of a copper nanowire with carbon. The method comprises the following steps of depositing on a copper nanowire substrate by adopting a multi-element co-deposition device integrating magnetic filtration, arc discharge and plasma to prepare a CuNWs / C corrosion-resistant coating. The purity of a magnetic filtration sample is high, sp2 carbon is firmly deposited on the surface of the copper nanowire through arc discharge combined with a plasma technology, a high-quality corrosion-resistant coating material can be prepared, the performance of a battery is improved, the service life of the battery is prolonged, and the method is applied to high-energy-density total batteries such as a lithium-sulfur battery and a lithium-air battery. The method is simple to operate, the process is convenient, and the method has practical application value.

Description

technical field [0001] The invention relates to a carbon plating method on the surface of copper nanowires, in particular to a multi-component integrated carbon plating technology and a preparation method of CuNWs / C anti-corrosion coating, which belongs to the technical field of surface anti-corrosion coating preparation. Background technique [0002] As a highly efficient secondary battery, lithium-ion batteries have been widely used in a variety of portable electronic devices. With the development of new energy electric vehicles, aerospace, and energy storage devices, the energy density and safety performance of lithium batteries have attracted much attention. Corrosion of the negative electrode current collector of lithium-ion batteries will affect the electronic conductivity between the current collector and the electrode active material, and the contact resistance between the two will increase significantly, thereby reducing the cycle efficiency, specific capacity and l...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/32B22F9/24B82Y40/00
CPCC23C14/0605C23C14/325B22F9/24B82Y40/00
Inventor 焦云飞陈子博何倩赵翠娥
Owner NANJING UNIV OF POSTS & TELECOMM
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