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A kind of preparation method and application of rice granular α-ferric oxide

A technology of ferric oxide and rice grains, applied in the direction of iron oxide, iron oxide/iron hydroxide, nanotechnology, etc., to achieve the effects of concentrated particle size distribution, good comprehensive electrochemical performance, and low production cost

Inactive Publication Date: 2011-11-30
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A kind of preparation method and application of rice granular α-ferric oxide
  • A kind of preparation method and application of rice granular α-ferric oxide
  • A kind of preparation method and application of rice granular α-ferric oxide

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Embodiment 1

[0018] Add 6.75 g of ferric chloride hexahydrate and 3.75 g of polyethylene glycol into 200 ml of deionized water, and stir mechanically for 0.5 hour to obtain a uniform mixed solution. The mixed solution was transferred to the bottom of the hydrothermal reaction tank and reacted at 160° C. for 12 hours. The hydrothermal product was washed several times by centrifugation with deionized water and absolute ethanol, and after vacuum freeze-drying, α-Fe 2 o 3 Precursor. The obtained material was calcined at 300°C for 2 hours and cooled to room temperature to obtain rice-like α-Fe 2 o 3 Material.

[0019] figure 1 a is the rice granular α-Fe that embodiment 1 obtains 2 o 3 The X-ray diffraction (XRD) pattern.

[0020] figure 2 and image 3 Be the rice granular α-Fe that embodiment 1 prepares 2 o 3 The morphology observed under the scanning electron microscope.

[0021] Research Electrode Pressed 40% Rice Granular α-Fe 2 o 3 Active material, 20% carbon black, 20% gra...

Embodiment 2

[0024] Add 6.75 g of ferric chloride hexahydrate and 6 g of polyethylene glycol into 400 ml of deionized water, and stir mechanically for 2 hours to obtain a uniform mixed solution. The above mixed solution was transferred to the bottom of the hydrothermal reaction tank, and reacted at 180° C. for 24 hours. The hydrothermal product was washed several times by centrifugation with deionized water and absolute ethanol, and after vacuum freeze-drying, α-Fe 2 o 3 Precursor. The obtained material was calcined at 500°C for 4 hours and cooled to room temperature to obtain rice-like α-Fe 2 o 3 Material.

[0025] figure 1 B is the rice granular α-Fe that embodiment 2 obtains 2 o 3 The X-ray diffraction (XRD) pattern.

[0026] Figure 5 and Figure 6 Be the rice granular α-Fe that embodiment 2 prepares 2 o 3 The morphology observed under the scanning electron microscope.

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Abstract

The invention discloses a preparation method and application of rice-like alpha-iron trioxide. The preparation process adopts a hydrothermal reaction method, and the specific steps are as follows: first, mechanical stirring is used to uniformly disperse the iron salt and the surfactant in deionized water to obtain a mixed solution; the mixed solution is placed in a reactor for hydrothermal reaction; finally, the obtained The product is washed and freeze-dried to obtain a precursor; then the precursor is calcined at 200-900° C. for 1-40 hours, cooled to room temperature and ground to obtain red rice-like ferric oxide powder material. The invention has the advantages of wide source of raw materials, simple preparation method, convenient operation, green and pollution-free, and the obtained material has high structural purity, regular morphology and uniform particle size distribution. It can reach more than 1000mAh / g, and has better cycle life.

Description

technical field [0001] The present invention relates to a kind of preparation method and application of ferric oxide, especially a kind of grain-like α-ferric oxide (α-Fe 2 o 3 ) preparation method and application, which belong to the field of new material preparation method and application technology. Background technique [0002] In recent years, the rapid development of electric tools, electric mopeds and electric vehicles has provided a broad application space for lithium-ion batteries, but at the same time it has put forward higher requirements for the performance of lithium-ion batteries. However, at present, graphite materials (theoretical capacity is 372mAh / g) are mainly used as the negative electrode in lithium-ion batteries, and its low theoretical capacity is the bottleneck that restricts lithium-ion batteries as future power batteries, so it is urgent to find a new generation of high specific energy electrodes. Material. α-Fe 2 o 3 As a lithium-ion battery a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00H01M4/52
CPCY02E60/12Y02E60/10
Inventor 吴超田雷雷李佳徐守冬邱祥云庄全超蒋荣立史月丽
Owner CHINA UNIV OF MINING & TECH
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