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Preparation method of iron tetroxide-carbon nanotube lithium battery negative electrode material

A technology of ferroferric oxide and carbon nanotubes, which is applied in the direction of battery electrodes, negative electrodes, nanotechnology, etc., can solve the problems of poor conductivity and achieve the effects of maintaining stable performance, improving cycle performance, and enhancing stability

Inactive Publication Date: 2019-01-01
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Application Information

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Problems solved by technology

[0009] The present invention aims to solve the above-mentioned deficiencies in the prior art, and provides a method for preparing the negative electrode material of iron oxide-carbon nanotube lithium battery, in which the metal oxide nanomaterial is connected to the surface of the carbon material with a large specific surface area, and the carbon material The structural stability can withstand the stress caused by the volume change, overcome the shortcomings of the poor conductivity of the nano-metal oxide active material, and enable the composite material to obtain excellent lithium battery performance

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  • Preparation method of iron tetroxide-carbon nanotube lithium battery negative electrode material

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[0027] A preparation method of ferroferric oxide-carbon nanotube lithium battery negative electrode material, comprising the following steps:

[0028] Step 1: Disperse the purchased carbon nanotubes in concentrated nitric acid (65%-68% in mass fraction), perform high-temperature acid treatment, and then wash and dry for subsequent use;

[0029] Step 2: dispersing acid-treated carbon nanotubes into deionized water;

[0030] Step 3: Add ferric chloride hexahydrate, urea, and polyvinylpyrrolidone into the mixed solution obtained in step 2, then add sodium potassium tartrate as a reducing agent, stir and dissolve fully, wherein ferric chloride hexahydrate: urea: sodium tartrate The mass ratio of potassium is 3.8~4.5:8~11:5~7; ferric chloride hexahydrate is used as the raw material of magnetic ferric oxide, and the input amount determines the magnetic ferric oxide particles attached to carbon nanotubes The thickness of urea provides an alkaline environment for the conversion of fe...

Embodiment 1

[0039] Weigh 0.11g of acid-treated carbon nanotubes obtained by acid treatment, disperse them in 40ml of deionized water, add 0.4g of ferric chloride hexahydrate to dissolve, add 0.9g of urea and 2g of polyvinylpyrrolidone, and continue to After stirring for 1.3 hours, 0.6 g of sodium potassium tartrate was added to dissolve. Then the mixture was poured into a polytetrafluoroethylene-lined stainless steel reaction kettle, sealed and heated to 190°C for 12 hours. After it was cooled to room temperature, it was repeatedly centrifuged and washed with deionized water and ethanol for more than 5 times, and the obtained magnetic black product was dried in a vacuum oven at 60° C. for 30 hours to obtain the target product.

Embodiment 2

[0041] Weigh 0.1g of acid-treated carbon nanotubes obtained by acid treatment, disperse them in 40ml of deionized water, add 0.38g of ferric chloride hexahydrate to dissolve, add 0.8g of urea, add 1.8g of polyvinylpyrrolidone, and stir under magnetic force Stirring was continued for 1 hour, and then 0.5 g of sodium potassium tartrate was added to dissolve. Then the mixture was poured into a polytetrafluoroethylene-lined stainless steel reaction kettle, sealed and heated to 180°C for 10 hours. After it was cooled to room temperature, it was centrifuged and washed with deionized water and ethanol repeatedly 5 times each, and the obtained magnetic black product was dried in a vacuum oven at 55° C. for 24 hours to obtain the target product.

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Abstract

The invention discloses a preparation method of an iron tetroxide-carbon nanotube lithium battery negative electrode material, and the preparation method comprises the following steps: 1. dispersing apurchased carbon nanotube in concentrated nitric acid (65%-68% by mass), carrying out high-temperature acid treatment, and cleaning and drying for standby; 2, dispersing the acid-treated carbon nanotubes into deionize water; 3, adding ferric chloride hexahydrate, urea and polyvinylpyrrolidone into the mixed solution obtain in the step 2, adding sodium potassium tartrate as a reducing agent, and fully stirring and dissolving; and 4, pouring the mixed liquid obtain in the step 3 into a stainless steel reaction kettle lined with polytetrafluoroethylene, sealing and heating, washing and drying toobtain a nano composite material. The metal oxide nanomaterial is bonded to the surface of a carbon material with a large specific surface area. The structural stability of the carbon material can withstand the stress caused by volume change and the shortcomings of poor conductivity of nano-metal oxide active materials are overcome, so that the composite material has excellent lithium electricalproperties.

Description

technical field [0001] The invention relates to the field of battery nanomaterials, in particular to a method for preparing a magnetic nanometer ferroferric oxide-carbon nanotube lithium battery negative electrode material. Background technique [0002] With the continuous progress of today's society, the rapid development of electronic information technology, aerospace, modern weapons and equipment, hybrid vehicles, and electric vehicles, there is an urgent need for new chemical power sources, especially secondary batteries with high energy density. The development of chemical power sources with high capacity, high charging and discharging power, long cycle life, environmental friendliness and low cost has become a common research topic for scientific and technological workers all over the world. Therefore, it is our inevitable choice to choose efficient green energy to achieve sustainable development. Lithium-ion batteries have outstanding performance in power supplies, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/52H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 李晓宇岳增武邵明星刘爽荆象阳傅敏胡新芳
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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