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Method for preparing graphene-loaded antimony nanotube negative electrode material for sodium ion battery and application of graphene-loaded antimony nanotube negative electrode material

A technology for sodium ion batteries and negative electrode materials, which is applied in battery electrodes, secondary batteries, circuits, etc., and can solve problems such as poor electrode stability, particle pulverization, and capacity reduction.

Active Publication Date: 2018-08-14
连云港鼎之材能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volume of antimony changes greatly during charge and discharge, and the stability of the electrode is poor, which is easy to cause particle pulverization and reduce the capacity.

Method used

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  • Method for preparing graphene-loaded antimony nanotube negative electrode material for sodium ion battery and application of graphene-loaded antimony nanotube negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1). Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0035] (2). Add 1mmol SbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0036] (3). Add solution B dropwise to solution A and stir to obtain solution C;

[0037] (4). 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, and synthesized product D was obtained after maintaining at 120°C for 3h;

[0038] (5). The product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0039] (6). Product E in H 2 Annealed at 350 °C for 12 h in a mixed atmosphere with Ar to obtain graphene-supported antimony nanotube composites. (Such as figure 1 shown)

[0040] Gained graphene-supported antimony nanotube composite material is used as a sodium-ion battery negative...

Embodiment 2

[0043] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0044] (2) 2mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0045] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0046] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0047] (5) The synthesized product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0048] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0049] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0050] A button cell is used...

Embodiment 3

[0052] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0053] (2) 3mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0054] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0055] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0056](5) The synthesized product D was synthesized by solvothermal reaction at 200°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0057] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0058] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0059] A button cell is used ...

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Abstract

The invention relates to a method for preparing a graphene-loaded antimony nanotube negative electrode material for a sodium ion battery and application of the graphene-loaded antimony nanotube negative electrode material. The preparation method comprises the steps of dissolving sodium sulfide with a certain mole ratio in ethylene glycol to obtain a solution A; dissolving antinomy chloride with acertain mole ratio in the ethylene glycol to obtain a solution B, dropwise adding the solution A into the solution B, and performing stirring to obtain a solution C; adding a graphene dispersion liquid with certain concentration into the solution C, transferring the mixed liquid to a high-pressure kettle with a polytetrafluoroethylene lining, and maintaining for a certain time under a certain temperature to obtain a synthesis product D; centrifugally separating the solvent thermal synthesis product D at 10,000rpm, washing the synthesis product D with deionized water and alcohol, and obtaininga product E after drying for 12 hours at 85 DEG C; and obtaining the graphene-loaded antimony nanotube composite material after the product E is annealed for a certain time in a mixed atmosphere of H2and Ar under a special temperature. The graphene-loaded antimony nanotube negative electrode material has the advantages of high cycle specific capacity, high coulombic efficiency and stable cycle property.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a method for preparing a graphene-supported antimony nanotube negative electrode material for a sodium ion battery and an application thereof. Background technique [0002] With the rapid development of the battery industry, the disadvantages of lithium-ion batteries are becoming more and more obvious. Lithium resource reserves are limited and can no longer meet people's growing energy needs. However, sodium-ion batteries will gradually become the mainstream due to their low cost, abundant reserves and wide distribution. Ideal replacement for lithium-ion batteries. [0003] Battery technology is the threshold for the vigorous promotion and development of electric vehicles, and the current battery industry is at a time when both lead-acid batteries and traditional lithium batteries are facing bottlenecks. bring about new changes. [0004] Graphene is a planar film comp...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M10/054
CPCH01M4/362H01M4/38H01M4/583H01M10/054Y02E60/10
Inventor 锁国权毕雅欣杨艳玲冯雷侯小江李丹陈华军奥迪占胜左玉张喆宫引引朱建锋
Owner 连云港鼎之材能源科技有限公司
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