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Antimony carbon negative electrode material of sodium ion battery, preparation therefor and application method thereof

A technology of sodium ion battery and carbon negative electrode material, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of battery capacity decay, electrode damage, uneven size of metal antimony particles, etc., to reduce the large volume change and diameter size Uniform, low-equipment generation effects

Inactive Publication Date: 2018-11-23
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above reports, the solution of antimony chloride is generally used as the precursor, and antimony chloride is easy to agglomerate into larger particles during the spray drying process, resulting in uneven particle size of metal antimony in the prepared antimony-carbon composite material. Electrode damage and battery capacity attenuation are prone to occur during discharge

Method used

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  • Antimony carbon negative electrode material of sodium ion battery, preparation therefor and application method thereof
  • Antimony carbon negative electrode material of sodium ion battery, preparation therefor and application method thereof
  • Antimony carbon negative electrode material of sodium ion battery, preparation therefor and application method thereof

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Embodiment 1

[0030] Dissolve 3 g of polyethylene glycol 2000 as a carbon source in 20 ml of methanol solution, add 15 g of nanometer antimony pentoxide colloidal solution, and stir evenly. Spray drying is performed at a temperature of 450° C., and the powder is collected to obtain a precursor material. The above materials were calcined for 3 hours at 500° C. in a 5% hydrogen-argon gas mixture to obtain a carbon layer-coated antimony carbon negative electrode material (see attached figure 1 As shown), it can be seen from the figure that the nano-antimony particles are coated with carbon materials, forming a good spherical composite structure. Composite X-ray diffraction patterns of amorphous carbon and characteristic peaks of metal antimony (as attached figure 2 shown), indicating the successful preparation of antimony-carbon composites.

Embodiment 2

[0032] Dissolve 1 g of polyethylene glycol 2000 as a carbon source in 20 ml of methanol solution, add 15 g of nanometer antimony pentoxide colloidal solution, and stir evenly. Spray drying is performed at a temperature of 450° C., and the powder is collected to obtain a precursor material. The above materials were calcined in 5% hydrogen-argon mixed gas at 500° C. for 3 hours to obtain a carbon layer-coated antimony carbon negative electrode material.

Embodiment 3

[0034] Dissolve 2 g of polyethylene glycol 2000 as a carbon source in 20 ml of methanol solution, add 15 g of nanometer antimony pentoxide colloidal solution, and stir evenly. Spray drying is performed at a temperature of 450° C., and the powder is collected to obtain a precursor material. The above materials were calcined in 5% hydrogen-argon mixed gas at 500° C. for 3 hours to obtain a carbon layer-coated antimony carbon negative electrode material.

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Abstract

The invention discloses an antimony carbon negative electrode material of a sodium ion battery, a preparation therefor and an application method thereof, and relates to the technical field of sodium ion battery negative electrode materials. The preparation method comprises the following steps: dissolving a carbon source in a methanol solution, adding nano antimony pentoxide colloidal solution, anduniformly stirring; spray drying at a high temperature and collecting powder to obtain a precursor material; and performing high-temperature calcination on the precursor material in a 5% of mixture of argon and hydrogen to obtain a carbon layer coated antimony carbon negative electrode material. The preparation method of the antimony negative electrode material of a sodium ion battery is simple,rapid and safe, and meets a requirement of green synthesis. Electrochemical test shows that the new carbon layer coated antimony carbon negative electrode material can effectively alleviate the problem of volume of the electrode material getting bigger during a charging and discharging process of the battery, so that the sodium ion battery can maintain a high specific capacity. In particular, theantimony negative electrode material is extremely useful for sodium ion batteries. According to the antimony carbon negative electrode material of a sodium ion battery, the preparation therefor and the application method thereof, a solid technical material basis for developing an energy storage battery system with abundant resources and low cost, and high capacity and high stability is provided.

Description

technical field [0001] The invention relates to the technical field of sodium-ion battery negative electrodes, in particular to a synthesis method and application of an antimony-carbon negative electrode material for sodium-ion batteries. Background technique [0002] With the continuous development and utilization of new energy sources, large-scale energy storage has become one of the key issues in the development of new energy technologies today. Whether it is the efficient use of renewable energy such as wind energy and solar energy, or the future clean transportation based on electric vehicles, cheap and efficient large-scale power storage is required as technical support. As a secondary battery that has been successfully commercialized, lithium-ion batteries have been widely used in portable electronic products, power tools, light-weight electric vehicles and other fields. However, the limited lithium resources on the earth will limit the development of lithium batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62
CPCH01M4/364H01M4/625Y02E60/10
Inventor 刘肖燕乐在原李欣茹田悦曹晓庆李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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