A kind of preparation method and application of carbon/iron tetroxide composite material

A technology of iron tetroxide and composite materials, which is applied in the field of one-step synthesis preparation, can solve the problems of complex material synthesis route, complicated experimental process and high cost, and achieves the effects of strong operability, simple process and improved electrical conductivity.

Active Publication Date: 2020-01-31
QUFU NORMAL UNIV
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  • 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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  • A kind of preparation method and application of carbon/iron tetroxide composite material
  • A kind of preparation method and application of carbon/iron tetroxide composite material
  • A kind of preparation method and application of carbon/iron tetroxide composite material

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preparation example Construction

[0041] The invention provides a kind of preparation method of carbon / ferric oxide composite material, comprises the following steps:

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

[0043]The present invention has no special restrictions on the iron source, and conventional iron sources well known to those skilled in the art can be used. 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 Iron source and / or ferric source, more preferably divalent iron source or ferric source, more specifically preferably include one or more in ferric nitrate, ferrous nitrate, ferrous sulfate and ferric chloride, most preferably Ferric nitrate or ferrous sulfate is preferred. The above-mentioned...

Embodiment 1

[0063] Weigh 1.616g Fe(NO 3 ) 3 9H 2 O, 0.3g polyacrylamide (PAM), after mixing, add 10ml absolute ethanol. Sonicate at room temperature for 30 minutes, then transfer to a reactor, seal it and place it in a crucible furnace, raise the temperature from room temperature to 600°C for 10 hours at a rate of 6°C / min, 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, which is 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 SEM image of the carbon / iron tetroxide composite material prepared in Example 1 of the present invention.

[0066] Analysis by scanning electron microscope: the product consists of two parts, carbon spheres and ferric oxide particles, wherein the size of carbon spheres is 5-10 μm,...

Embodiment 2

[0082] Weigh 4.04g Fe(NO 3 ) 3 9H 2 O, pour 10ml of absolute ethanol and add 0.3g of PAM. The heating procedure is the same as in Example 1. After the reaction kettle is naturally cooled to room temperature, the product is collected and washed with a mixed solution of ethanol and water to obtain the product, which is a pure-phase carbon / iron tetroxide 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 SEM image of the carbon / iron tetroxide composite material prepared in Example 2 of the present invention.

[0085] Analysis by scanning electron microscope: the product includes two parts, carbon spheres and ferric oxide particles, in which the carbon content decreases (the amount of iron source added increases, and the iron oxide generated increases), the ferric oxide particles tend to be octahedral, and the particles The size increase was ~2...

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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 / ferric oxide composite material, in particular to a preparation method and application of one-step synthesis 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, and have become rechargeable batteries in high-power electric vehicles, artificial satellites, aerospace and other fields The main selection object of the power supply. Especially in practical applications, lithium-ion batteries have become an ideal energy source for various portable electronic devices, such as notebook computers, mobile phones, etc. However, the current lithium-ion batteries can no longer meet the requirements of the rapid development of n...

Claims

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Application Information

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Patent Type & Authority Patents(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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