Metallic antimony/graphene composite material, and preparation method and application thereof

A composite material, metal antimony technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of poor electrochemical stability of metal antimony, large size of metal antimony particles, uneven distribution, etc. simple craftsmanship

Inactive Publication Date: 2012-10-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large volume change of metal antimony during charge and discharge, and the large particle size and uneven distribution of metal antimony prepared by traditional methods, the electrochemical stability of metal antimony is poor.

Method used

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  • Metallic antimony/graphene composite material, and preparation method and application thereof
  • Metallic antimony/graphene composite material, and preparation method and application thereof
  • Metallic antimony/graphene composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) The analytically pure SbCl 3 Dissolved in absolute ethanol to obtain Sb 3+ For a solution with a concentration of 0.2 mol / L, the volume of the solution is 80 milliliters.

[0032] 2) After adding 400 mg of GO to the solution in step 1), place it in an autoclave with a capacity of 100 ml (filling degree 80%, volume percentage), and add 6.8 grams of reducing agent NaBH to the solution 4 , then seal immediately.

[0033] 3) Heating the reactor to 200°C and reacting for 24 hours.

[0034] 4) Naturally cool to room temperature after the reaction, collect the powdery reaction product at the bottom of the kettle, wash it with deionized water and absolute ethanol alternately and repeatedly for several times, then vacuum dry the powder at 110°C for 12 hours to obtain a composite material powder , the weight percentage of graphene in the composite material is 8%.

[0035] The X-ray diffraction spectrum and transmission electron microscope photograph of the composite materi...

Embodiment 2

[0038] 1) Analytical pure Sb(NO 3 ) 3 Dissolved in deionized water to obtain Sb 3+Concentration is the solution of 0.05mol / L, and the solution volume is 80 milliliters.

[0039] 2) After adding 195 mg of GO to the solution in step 1), place it in a high-pressure reactor with a capacity of 100 ml (filling degree 80%, volume percentage), and add 6.2 grams of reducing agent KBH to the solution 4 , then seal immediately.

[0040] 3) Heating the reactor to 180°C and reacting for 36 hours.

[0041] 4) Naturally cool to room temperature after the reaction, collect the powdery reaction product at the bottom of the kettle, wash it with deionized water and absolute ethanol alternately and repeatedly for several times, then vacuum dry the powder at 110°C for 12 hours to obtain a composite material powder , the weight percentage of graphene in the composite material is 16%.

[0042] The composite material powder of gained is analyzed through X-ray diffraction spectrum and transmissio...

Embodiment 3

[0045] 1) The analytically pure SbCl 3 Dissolved in anhydrous ethylene glycol to obtain Sb 3+ Concentration is the solution of 0.3mol / L, and solution volume is 80 milliliters.

[0046] 2) After adding 290 mg of GO to the solution in step 1), place it in an autoclave with a capacity of 100 ml (filling degree 80%, volume percentage), and add 13.8 g of reducing agent KBH to the solution 4 , then seal immediately.

[0047] 3) Heating the reactor to 220°C and reacting for 48 hours.

[0048] 4) Naturally cool to room temperature after the reaction, collect the powdery reaction product at the bottom of the kettle, wash it with deionized water and absolute ethanol alternately and repeatedly for several times, then vacuum dry the powder at 110°C for 12 hours to obtain a composite material powder , the weight percent of graphene in the composite is 4%.

[0049] The composite material powder of gained is analyzed through X-ray diffraction spectrum and transmission electron microscope...

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Abstract

The invention discloses a metallic antimony/graphene composite material which is composed of nano metallic antimony and graphene. Under the dispersion and loading action of the graphene, the metallic antimony can be distributed uniformly, the stability of the metallic antimony in the charging/discharging process can be effectively enhanced, and the composite material can be used as a lithium ion battery negative pole material. The invention also discloses a preparation method of the composite material by a one-step hydrothermal process or one-step solvothermal process, which has the advantages of simple technique, low cost, short cycle, low energy consumption and the like.

Description

technical field [0001] The invention relates to the field of composite materials for lithium ion batteries, in particular to a metal antimony / graphene composite material and its preparation method and application. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density, and good safety performance. Therefore, they are widely used in portable electronic products such as digital cameras, mobile phones, and notebook computers. They also have application prospects for electric bicycles and electric vehicles. The anode materials of current commercial lithium-ion batteries are graphite and other forms of carbon materials. Since the theoretical capacity of graphite is only 372mAh g -1 , and the lithium intercalation potential is low, which limits its application range. Compared with carbon materials such as graphite, metal antimony has a more ideal lithium intercalation potential and a higher mass ratio and volume speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62
CPCY02E60/12Y02E60/10
Inventor 谢健郑云肖刘双宇宋文涛朱铁军曹高劭赵新兵
Owner ZHEJIANG UNIV
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