Spherical ferrate having hollow structure and preparation method thereof

A hollow structure, ferrite technology, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve problems that restrict the performance of ferrite materials such as lithium-ion battery applications, and achieve uniform particle distribution and preparation parameters Ease of control and uniform particle size distribution

Inactive Publication Date: 2012-07-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still difficulties in preparing ferrite materials with a hollow structure, which seriously restricts the improvement of the properties of ferrite materials and their application in lithium-ion batteries.

Method used

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  • Spherical ferrate having hollow structure and preparation method thereof
  • Spherical ferrate having hollow structure and preparation method thereof
  • Spherical ferrate having hollow structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 10mmol of ferric chloride and 5mmol of zinc chloride, add them to 80mL of ethylene glycol, dissolve to obtain a clear solution, then slowly add 2ml of polyethylene glycol dropwise under vigorous stirring, and finally add 90mmol of urea, and continue stirring for 20min . The obtained solution is poured into a polytetrafluoroethylene liner with a capacity of 100 ml to a filling degree of 80%. After sealing, put it into a stainless steel reaction kettle, place it in an oven and react at 200°C for 24h. After the reaction kettle was lowered to room temperature, the product was collected, and the product was centrifugally washed several times with ethanol and distilled water. Finally, the washed product was placed in a vacuum oven and dried at 60°C for 12 hours to obtain zinc ferrite powder. That figure 1 The X-ray diffraction spectrum of the self-assembled zinc ferrite hollow microsphere powder prepared in this example can be seen from the spectrum that its phase is z...

Embodiment 2

[0032]Take 10mmol of ferric chloride and 5mmol of cobalt chloride as starting materials, add them into 80mL of ethylene glycol, dissolve to obtain a clear solution, then slowly add 2ml of PEG-600 dropwise under vigorous stirring, and finally add 90mmol of urea, Stirring was continued for 20 min. The obtained solution is poured into a polytetrafluoroethylene liner with a capacity of 100 ml to a filling degree of 50%. After sealing, put it into a stainless steel reaction kettle, place it in an oven and react at 200°C for 24h. After the reaction kettle was lowered to room temperature, the product was collected, and the product was centrifugally washed several times with ethanol and distilled water. Finally, the washed product was placed in a vacuum oven and dried at 60°C for 12 hours to obtain cobalt ferrite powder. The results of X-ray diffraction pattern show that its phase is cobalt ferrite with cubic spinel structure. The scanning electron microscope observation results sho...

Embodiment 3

[0034] Take 4mmol of iron nitrate and 2mmol of nickel nitrate as starting materials, add them into 80mL of ethylene glycol, dissolve to obtain a clear solution, then slowly add 2ml of PEG-600 dropwise under vigorous stirring, and finally add 8mmol of urea, continue stirring 20min. The obtained solution is poured into a polytetrafluoroethylene liner with a capacity of 100 ml to a filling degree of 80%. After sealing, put it into a stainless steel reaction kettle, place it in an oven and react at 240°C for 6h. After the reaction kettle was lowered to room temperature, the product was collected, washed several times with ethanol and distilled water, and finally the washed product was put into a vacuum oven and dried at 60° C. for 12 hours. Finally, the self-assembled nickel ferrite hollow microsphere powder is obtained. The results of X-ray diffraction pattern show that its phase is nickel ferrite with cubic spinel structure. The scanning electron microscope observation result...

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Abstract

The invention discloses spherical ferrate having a hollow structure and a preparation method thereof. The ferrate MFe2O4 is of a hollow-structured spherical particle formed by self-assembling of nanocrystals having a particle size of 10-50nm, wherein M is Co, Ni or Zn, the diameter of the particle is 0.1-1mu m, and the thickness of a shell layer is 30-200nm. The spherical ferrate can be used as a negative electrode material of a lithium ion battery.

Description

[0001] technical field [0002] The invention relates to a spherical ferrite with a hollow structure in the field of lithium ion batteries, and a preparation method thereof. Background technique [0003] Under the background of global resource shortage and environmental deterioration, people have to speed up the pace of new energy development, and the development of clean energy storage equipment has also attracted great attention from all over the world. Among them, lithium-ion batteries have the advantages of high voltage, high capacity, small size, light weight, no memory function, long cycle life, and good safety performance. They have become the first choice for rechargeable power supplies for portable electronic products today. It has broad application prospects in fields such as energy storage and space technology, and is an energy storage device that various countries are currently committed to developing. Ferrite MFe 2 o 4 , M=(Co, Ni, Zn, etc.) is one of the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00
Inventor 李广社陈小梅李莉萍关翔锋
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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