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Preparation method of carbon-based nano composite material electrode of lithium ion battery

A lithium-ion battery and composite material technology, which is applied in the field of preparation of carbon-based nanocomposite electrodes for lithium-ion batteries, can solve the problems of lithium-ion battery rate performance and energy density, poor adhesion between active materials and metal current collectors, and battery problems. Electrochemical performance degradation and other problems, to achieve the effect of light weight, high energy density, and low cost

Active Publication Date: 2020-08-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the structure of the traditional lithium-ion battery, the electrode material uses a metal current collector, which is heavy, the adhesion between the active material and the metal current collector is poor, and the active materials of the positive and negative electrodes are easily peeled off from the current collector. Therefore, the traditional The rate performance and energy density of lithium-ion batteries need to be improved
In addition, the poor adhesion between contact interfaces leads to poor conductivity of contact electrons, and the electrochemical performance of the obtained battery will also be degraded.

Method used

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  • Preparation method of carbon-based nano composite material electrode of lithium ion battery
  • Preparation method of carbon-based nano composite material electrode of lithium ion battery

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Effect test

Embodiment 1

[0025] First, the CVD method is used to grow high-purity carbon nanocoil CNCs. Under an argon protective atmosphere, acetylene is used as a carbon source with an amount of 10 sccm, and iron-tin solution is used as a catalyst to grow and prepare high-purity carbon nanocoils at a high temperature of 650°C. Coil CNCs.

[0026] Next, add the obtained high-purity CNCs into concentrated nitric acid for acidification treatment, add 5 g of CNCs for every 10 ml of concentrated nitric acid, ultrasonically disperse for two hours, then carry out suction filtration, wash with deionized water three times, and place in an oven to dry for 2 hours. Get acidified CNCs.

[0027] Finally, disperse 22.5mg CNT and 7.5mg CNCs in 30ml deionized water, add 200μl dispersant Triton X-100, at room temperature, ultrasonic cleaning machine ultrasonic 40min, ultrasonic cell pulverizer ultrasonic 40min, get CNT and CNC Mix the solutions, and then use a vacuum pump and a suction filtration device to obtain a...

Embodiment 2

[0031] First, the CVD method is used to grow high-purity carbon nanocoil CNCs. Under the protective atmosphere of argon, acetylene is used as the carbon source, and the dosage is 30 sccm. The iron-tin solution is used as the catalyst, and high-purity carbon nanocoils are grown at a high temperature of 650 ° C. Coil CNCs.

[0032] Next, add the obtained high-purity CNCs into concentrated nitric acid for acidification treatment, add 5 g of CNCs for every 10 ml of concentrated nitric acid, ultrasonically disperse for two hours, then carry out suction filtration, wash with deionized water three times, and place in an oven to dry for 2 hours. Get acidified CNCs.

[0033]Finally, 30mg of CNT and 10mg of CNCs were dispersed in 40ml of deionized water, 250μl of dispersant Triton X-100 was added, and after ultrasonication at room temperature for 20min, ultrasonic cell pulverizer was ultrasonicated for 60min to obtain a mixed solution of CNT and CNC, and then vacuum pump and filter dev...

Embodiment 3

[0039] First, the CVD method is used to grow high-purity carbon nanocoil CNCs. Under the protective atmosphere of argon, acetylene is used as the carbon source, and the dosage is 20 sccm. The iron-tin solution is used as the catalyst, and the high-purity carbon nanocoils are grown at 650 ° C. Coil CNCs.

[0040] Next, add the obtained high-purity CNCs into concentrated nitric acid for acidification treatment, add 5 g of CNCs for every 10 ml of concentrated nitric acid, ultrasonically disperse for two hours, then carry out suction filtration, wash with deionized water three times, and place in an oven to dry for 2 hours. Get acidified CNCs.

[0041] Finally, 30 mg of CNT and 10 mg of CNCs were dispersed in 40 ml of deionized water, 250 μl of dispersant Triton X-100 was added, and after ultrasonication at room temperature for 60 minutes, ultrasonic cell pulverizer was used for ultrasonication for 20 minutes to obtain a mixed solution of CNT and CNC. filter device to obtain CNT-...

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Abstract

The invention discloses a preparation method of a carbon-based nano composite material electrode of a lithium ion battery, and belongs to the field of energy. The method comprises the following steps:firstly, growing high-purity carbon nano coils CNCs by adopting a CVD method; secondly, adding the CNCs into concentrated nitric acid for acidizing treatment, adding the acidized CNCs, CNT and a dispersing agent into deionized water, and performing ultrasonic treatment, suction filtration and drying treatment to obtain a mixed carbon film; and finally, dispensing the electrode slurry onto a mixedcarbon film CNT-CNC to be pressed into a wafer, and drying to obtain the electrode plate; and assembling the button lithium ion battery based on the electrode plate. The method is simple to operate,and the carbon film prepared by a suction filtration process is low in cost. Compared with a traditional current collector, the prepared carbon film current collector is light in weight. The contact between the active material and the carbon film current collector is good. The prepared button lithium ion battery has excellent rate capability and high energy density.

Description

technical field [0001] The invention belongs to the field of energy, and relates to a method for preparing a carbon-based nanocomposite material electrode of a lithium-ion battery. The preparation method uses two kinds of carbon-based nanomaterials (CNT (Carbon nanotube), CNC (Carbon Nanocoils)) to prepare through a suction filtration process Lithium battery electrode materials have achieved higher energy density and excellent rate performance. Background technique [0002] In the era of the Internet of Everything, all kinds of electronic devices have become new applications in the daily life of human society. As a functional device, an electronic device needs to meet the requirements of the human body for the device, such as long standby time and fast charging. The development and application of such devices is inseparable from high-performance lithium-ion batteries for energy storage to meet their power requirements. [0003] Lithium-ion batteries (Lithium-ion batteries,...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/1397H01M10/0525
CPCH01M4/1397H01M4/663H01M10/0525Y02E60/10
Inventor 潘路军陈焕郝亮王晨
Owner DALIAN UNIV OF TECH
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