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Preparation method and application of carbon/Fe3O4 composite material

A technology of ferroferric oxide and composite materials, which is applied in the field of one-step synthesis, can solve the problems of complex material synthesis route, complicated experimental process, and low yield, and achieve the effect of strong operability, simple process, and good conductivity

Active Publication Date: 2017-05-10
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in many research reports, the experimental process of doping carbon materials is: preparing oxide particles and carbon sources mixed with carbonization and sintering in an inert atmosphere. The experimental process is relatively complicated, and the preparation of most materials requires multi-step reactions. Successfully compounded with carbon materials, which leads to a complex synthesis route, low yield and high cost

Method used

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  • Preparation method and application of carbon/Fe3O4 composite material
  • Preparation method and application of carbon/Fe3O4 composite material
  • Preparation method and application of carbon/Fe3O4 composite material

Examples

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preparation example Construction

[0041] The invention provides a method for preparing a carbon / ferroferric oxide composite material, including the following steps:

[0042] A) After mixing the iron source and the liquid carbon source, a mixture is obtained, and then the mixture is heat-treated under airtight conditions to obtain a carbon / ferroferric oxide composite material.

[0043] The present invention does not have special restrictions on the iron source, as long as the conventional iron source is well known to those skilled in the art, those skilled in the art can select and adjust according to actual production conditions, product requirements and quality requirements. The present invention preferably includes divalent The iron source and / or the trivalent iron source, more preferably a divalent iron source or a trivalent iron source, more specifically preferably include one or more of ferric nitrate, ferrous nitrate, ferrous sulfate and ferric chloride, most Preferably, it is ferric nitrate or ferrous sulfat...

Embodiment 1

[0063] Weigh 1.616g Fe(NO 3 ) 3 ·9H 2 O, 0.3g polyacrylamide (PAM), after mixing, add 10ml absolute ethanol. Ultrasound for 30 minutes at room temperature, then transfer it to the reactor, seal it and place it in the crucible furnace, raise the temperature from room temperature to 600℃ at a heating rate of 6℃ / min for 10 hours, and collect the product after the reactor is naturally cooled to room temperature. The product is obtained after washing with a mixed solution of ethanol and water, a pure phase carbon / ferric oxide composite material.

[0064] The carbon / ferric oxide composite material prepared in Example 1 of the present invention was characterized and analyzed.

[0065] See figure 1 , figure 1 This is the SEM image of the carbon / ferric oxide composite material prepared in Example 1 of the present invention.

[0066] Analyzed by scanning electron microscopy: the product includes two parts, carbon balls and ferroferric oxide particles. The size of the carbon balls is 5-10μm, F...

Embodiment 2

[0082] Weigh 4.04g Fe(NO 3 ) 3 ·9H 2 O, pour 10ml absolute ethanol, add 0.3g PAM. The temperature rise procedure is the same as in Example 1. After the reactor is naturally cooled to room temperature, the product is collected, washed with a mixed solution of ethanol and water to obtain the product, a pure phase carbon / ferric oxide composite material.

[0083] The carbon / ferric oxide composite material prepared in Example 2 of the present invention was characterized and analyzed.

[0084] See Image 6 , Image 6 This is the SEM image of the carbon / ferric oxide composite material prepared in Example 2 of the present invention.

[0085] Analyzed by scanning electron microscopy: the product includes two parts, carbon balls and ferroferric oxide particles. The carbon content is reduced (the addition of iron source increases, the generated iron oxide increases), ferroferric oxide particles tend to be octahedral, and the particles The size increases to ~2μm.

[0086] The reason for the anal...

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Abstract

The invention provides a preparation method of a carbon / Fe3O4 composite material. The preparation method comprises the following steps that an iron source and a liquid-phase carbon source are mixed to obtain a mixture, and then the mixture is heated under sealed conditions to obtain the carbon / Fe3O4 composite material. According to the invention, the iron source and the carbon source are pyrolyzed and carbonized under the sealed conditions to obtain a composite product. Furthermore, the composite material is prepared by using a one-step method, and most of carbon materials in the composite material are carbon spheres which are excellent in conductivity, meanwhile, most of oxide particles are just attached to the carbon spheres, when high-power current multiplying power passes through the material, the carbon spheres can quickly transmit electrons to active oxide particles, therefore, the electron use rate is improved greatly to improve the conductivity and high-rate discharge performances of the composite material. In addition, the carbon materials in the composite product have the effect of stable Fe3O4 particles, so that the discharge specific capacity of the composite material has a rising trend.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a preparation method and application of a carbon / ferroferric oxide composite material, in particular to a one-step synthesis preparation method and application of a carbon / ferric oxide composite material. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific energy, long cycle life, light weight, less self-discharge, no memory effect and high cost performance. They have become rechargeable in high-power electric vehicles, artificial satellites, aerospace and other fields. The main choice of power supply. Especially in practical applications, lithium-ion batteries have become an ideal energy source for various portable electronic devices, such as laptop computers and mobile phones. However, current lithium-ion batteries can no longer meet the requirements of the rapidly developing electric vehicles and other new elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525
CPCH01M4/366H01M4/523H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 于洋耿孝岭王巍
Owner QUFU NORMAL UNIV
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