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Preparation method of Sb-based ductile carbon composite negative electrode material

A negative electrode material and ductile technology, which is applied in the field of preparation of antimony/ductile carbon composite negative electrode materials, can solve the problems of limited electrode cycle stability, shorten the diffusion and migration distance, increase stability, and buffer volume expansion Effect

Inactive Publication Date: 2019-09-24
XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycling stability of Sb-based electrodes is still limited to less than 100 cycles

Method used

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  • Preparation method of Sb-based ductile carbon composite negative electrode material
  • Preparation method of Sb-based ductile carbon composite negative electrode material
  • Preparation method of Sb-based ductile carbon composite negative electrode material

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preparation example Construction

[0027] refer to figure 1 , a preparation method of antimony / ductile carbon composite negative electrode material, said method comprising the steps of:

[0028] S01, metal salt and citric acid are dissolved in deionized water, obtain uniform transparent solution, and described metal salt is antimony chloride (SbCl );

[0029] S02, adding the graphene oxide solution into the transparent solution, and continuously stirring, the continuous stirring time is 20-90min, to obtain a uniform mixed solution;

[0030] S03, the mixed solution is quickly frozen, and the solid is removed by freeze-drying to obtain a spongy sample;

[0031] S04, grinding the spongy sample into a fine powder to obtain a mixed powder;

[0032] S05. Carry out heat treatment to the composite powder, the heat treatment process: put the composite powder into a quartz boat, then place the quartz boat in a tube furnace, and then in a hydrogen and argon atmosphere, the volume of the hydrogen and argon The ratio is ...

Embodiment 1

[0035] like figure 1 As shown, first S01, antimony chloride (SbCl 3 ) and citric acid were dissolved in deionized water to obtain a uniform transparent solution;

[0036] Then S02, graphene oxide (GO) solution is added in above-mentioned homogeneous transparent solution, and continuous stirring 30min, obtains uniform mixed solution;

[0037] Then S03, the mixed solution is snap-frozen, and the solid is removed by freeze-drying to obtain a spongy sample;

[0038] S04 grinds the spongy sample into a fine powder again to obtain a mixed powder;

[0039] Finally S05 heat-treats the resulting mixed powder, that is, the composite powder is put into a quartz boat, and then the quartz boat is placed in a tube furnace, and then heated in hydrogen (H 2 ) and argon (Ar) atmosphere (V / V=10 / 90), at 5°C min -1 The heating rate was increased to 650°C, and the temperature was maintained for 3 hours to obtain an antimony / ductile carbon composite negative electrode material.

[0040] like ...

Embodiment 2

[0045] First, antimony chloride (SbCl 3 ) and citric acid were dissolved in deionized water to obtain a uniform transparent solution;

[0046] Next, the graphene oxide (GO) solution was added to the above-mentioned uniform transparent solution, and continued to stir for 60 minutes to obtain a uniform mixed solution;

[0047] Then, the mixed solution was snap-frozen, and the solids were removed by freeze-drying to obtain a sponge-like sample;

[0048] Then the sponge sample is ground into a fine powder to obtain a mixed powder;

[0049] Finally, the resulting mixed powder is heat-treated, that is, the composite powder is put into a quartz boat, and then the quartz boat is placed in a tube furnace, and then heated in hydrogen (H 2 ) and argon (Ar) atmosphere (V / V=10 / 90), at 4°C min -1 The heating rate was increased to 600°C, and the temperature was maintained for 5 hours to obtain an antimony / ductile carbon composite negative electrode material.

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Abstract

The invention discloses a preparation method of a Sb-based ductile carbon composite negative electrode material. The method comprises the steps of dissolving metal salt and citric acid in deionized water to obtain a uniform transparent solution; adding a graphene oxide solution into the transparent solution, and continuously stirring to obtain a uniform mixed solution; rapidly freezing the mixed solution, removing solid by means of freezing and drying to obtain a spongy sample, grinding the spongy sample into fine powder to obtain mixed powder; and carrying out heat treatment on the composite powder. The material is obtained according to a one-step synthesis method, the preparation method is simple, and the material has the advantages of high capacity, long cycle life, excellent rate performance and good stability. Lithium ion batteries based on the Sb-based ductile carbon composite negative electrode material are enabled to have ultra-long cycle stability and excellent rate performance.

Description

technical field [0001] The invention relates to the technical field of potassium ion batteries, in particular to a preparation method of an antimony / ductile carbon composite negative electrode material. Background technique [0002] With the rapid development of renewable energy such as solar energy, wind energy, and water energy, it is urgent to find low-cost, high-efficiency energy storage devices to solve the problem of renewable energy storage with regional and intermittent defects, and to effectively store clean energy . Lithium-ion batteries (LIBs) are widely used in portable electronic devices, and in recent years have been used in electric vehicles due to their high energy and high power density. However, the further development of Li-ion batteries is limited due to high cost and limited Li resources. Therefore, sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) have been extensively studied due to their advantages such as low cost and abundant resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/054B82Y30/00
CPCH01M4/362H01M4/366H01M4/38H01M4/625H01M4/628H01M10/054B82Y30/00Y02E60/10
Inventor 林楷睿
Owner XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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