Method for preparing nano ferrous disulfide microsphere with limited range

A technology of iron disulfide and microspheres, applied in iron sulfide, nanotechnology, electrical components, etc., can solve problems such as uneven wrapping, achieve excellent rate performance and cycle performance, and the method is simple and easy to implement

Inactive Publication Date: 2019-08-30
佛山市格瑞芬新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional carbon encapsulation method needs to introduce other carbon sources, and can only be encased on the periphery of the overall material, and the encapsulation degree is not uniform

Method used

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  • Method for preparing nano ferrous disulfide microsphere with limited range
  • Method for preparing nano ferrous disulfide microsphere with limited range
  • Method for preparing nano ferrous disulfide microsphere with limited range

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A method for preparing a negative electrode material for a nano-iron disulfide microsphere sodium-ion battery synthesized by confinement, comprising the following steps:

[0053]1) Dissolve 9g of ferric oleate and 3g of oleic acid in 50ml of octadecene, raise the temperature to 120°C under a nitrogen atmosphere, and vacuumize for 1 hour; then raise the temperature to 320°C under a nitrogen atmosphere, and maintain it for 1 hour. 18nm ferric oxide nanoparticles;

[0054] 2) After cooling down naturally, mix the reacted solution with the ethanol solution at a ratio of 1:1, centrifuge at 3000rpm and wash twice, and finally disperse into n-hexane (solid content is 50mg / ml);

[0055] 3) Drop 1ml of iron ferric oxide nanoparticles into 10ml of 2% DTAB aqueous solution, homogenize at 5000rpm for 10 minutes, heat to 40°C, keep the temperature constant for 1 hour, and obtain ferric oxide microspheres after cooling and washing;

[0056] 4) Calcining the nano-iron ferric oxide mi...

Embodiment 2

[0065] A method for preparing a negative electrode material for a nano-iron disulfide microsphere sodium-ion battery synthesized by confinement, comprising the following steps:

[0066] 1) Dissolve 9g of iron oleate and 3g of oleic acid in 50ml of octadecene, raise the temperature to 120°C under a nitrogen atmosphere, and vacuumize for 1 hour; then raise the temperature to 320°C under a nitrogen atmosphere, and maintain it for 0.8 hours. 16nm ferric oxide nanoparticles;

[0067] 2) After cooling down naturally, mix the reacted solution with the ethanol solution at a ratio of 1:1, centrifuge at 3000rpm and wash twice, and finally disperse into n-hexane (solid content is 60mg / ml);

[0068] 3) Drop 1ml of iron ferric oxide nanoparticles into 10ml of 2% DTAB aqueous solution, homogenize at 5000rpm for 10 minutes, heat to 40°C, keep the temperature constant for 1 hour, and obtain ferric oxide microspheres after cooling and washing;

[0069] 4) Calcining the nano-iron ferric oxide ...

Embodiment 3

[0073] A method for preparing a negative electrode material for a nano-iron disulfide microsphere sodium-ion battery synthesized by confinement, comprising the following steps:

[0074] 1) Dissolve 9g of iron oleate and 3g of oleic acid in 50ml of octadecene, raise the temperature to 120°C under a nitrogen atmosphere, and vacuumize for 1 hour; then raise the temperature to 320°C under a nitrogen atmosphere, and maintain it for 1.2 hours. 19nm ferric oxide nanoparticles;

[0075] 2) After cooling down naturally, mix the reacted solution with the ethanol solution at a ratio of 1:1, centrifuge at 3000rpm and wash twice, and finally disperse into n-hexane (solid content is 50mg / ml);

[0076] 3) Drop 1ml of iron ferric oxide nanoparticles into 10ml of 2% SDS aqueous solution, homogenize at 5000rpm for 10 minutes, heat to 40°C, keep the temperature constant for 1 hour, and obtain ferric oxide microspheres after cooling and washing;

[0077] 4) Calcining the nano-iron ferric oxide m...

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Abstract

The invention discloses a method for preparing nano ferrous disulfide microsphere sodium-ion battery cathode material with a limited range. The method comprises the following steps: 1) synthesizing ferriferrous oxide nanoparticles by using a high-temperature solvent method; 2) assembling ferriferrous oxide microspheres by using an emulsion method, and carrying out high-temperature surface oleic acid carbonization so as to form carbon shells; and 3) pre-etching the ferriferrous oxide microspheres, and carrying out one-step vulcanization, so as to obtain the nano ferrous disulfide microsphere sodium-ion battery cathode material. Granules of the nano ferrous disulfide microspheres prepared by using the method are all of a nano grade, each granule is uniformly coated by the carbon shell, and the nano ferrous disulfide microspheres are excellent in rate capability and cycle performance when being applied to the cathode of a sodium-ion battery.

Description

technical field [0001] The invention relates to a method for preparing inorganic materials, in particular to a method for preparing nanometer iron disulfide microspheres within a limited area. Background technique [0002] In recent years, people's research on sodium-ion batteries has been deepening day by day. Compared with lithium-ion batteries, sodium-ion batteries have more abundant sodium resources, lower cost and comparable specific capacity, so they are more suitable for large-scale energy storage. However, the ion radius of sodium ion is larger than that of lithium ion, and the reduction potential is higher than that of lithium ion. Therefore, in the process of electrochemical ion intercalation, sodium ion is more likely to cause the crystal structure of the material to be broken, resulting in a change in the cycle performance and rate performance of the battery. Therefore, finding a feasible and cheap sodium ion anode material has always been the focus of people's ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/12B82Y40/00H01M4/58
CPCB82Y40/00C01G49/12C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/64H01M4/5815Y02E60/10
Inventor 董安钢姚卢寅杨东韩丹丹杨于驰
Owner 佛山市格瑞芬新能源有限公司
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