Preparation method and application of carbon-coated tantalum nanotube material of negative electrode material of sodium ion battery

A technology for sodium ion batteries and negative electrode materials, which is applied in the fields of nanotechnology, battery electrodes, and nanotechnology for materials and surface science, can solve the problems of large volume change of antimony, poor electrode stability, and reduced capacity, and achieves low cost. , the preparation method is simple, the effect of high rate capacity

Active Publication Date: 2018-08-10
北京博雅合众环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method and application of carbon-coated tantalum nanotube material of negative electrode material of sodium ion battery

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) 1mmolSbCl 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) Transfer the solution C to a polytetrafluoroethylene-lined autoclave, and keep it at 160°C for 12 hours to obtain the synthetic product D;

[0038] (5) The synthesized product D was reacted at 120°C for 10 hours by solvent heat, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain Sb 2 S 3 powder;

[0039] (6) Sb 2 S 3 The nanorod precursor was soaked in 20 mg / ml glucose solution for 12 hours, then centrifuged and dried to obtain product E;

[0040] (7) The product E is in H 2 Annealed at 350°C for 12h in a mixed atmosphere with Ar to obtain a carbon-coated antimony nanotube anode material.

[0041] Gained carbon-coated antimony nanotube negative ...

Embodiment 2

[0044] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0045] (2) 2mmol SbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0046] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0047] (4) Transfer the C solution to a polytetrafluoroethylene-lined autoclave, and keep it at 160°C for 12 hours to obtain the synthetic product D;

[0048] (5) The synthesized product D was reacted at 120°C for 10 hours by solvent heat, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain Sb 2 S 3 powder;

[0049] (6) Sb 2 S 3 The nanorod precursor was soaked in the glucose solution of 20mg / ml concentration for 12 hours, then centrifuged and dried to obtain product E;

[0050] (7) The product E is in H 2 Annealed at 350°C for 12h in a mixed atmosphere with Ar to obtain a carbon-coated antimony nanotube anode material.

[0051] Gained carbon-coated antimo...

Embodiment 3

[0054] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0055](2) 3mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0056] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0057] (4) Transfer the C solution to a polytetrafluoroethylene-lined autoclave, and keep it at 160°C for 12 hours to obtain the synthetic product D;

[0058] (5) The synthesized product D was reacted 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 Sb 2 S 3 powder;

[0059] (6) Sb 2 S 3 The nanorod precursor was soaked in the glucose solution of 20mg / ml concentration for 12 hours, then centrifuged and dried to obtain product E;

[0060] (7) The product E is in H 2 Annealed at 350°C for 12h in a mixed atmosphere with Ar to obtain a carbon-coated antimony nanotube anode material.

[0061] Gained carbon-coated antimony nanotube negati...

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Abstract

The invention provides a preparation method and application of a carbon-coated tantalum nanotube material of a negative electrode material of a sodium ion battery. The preparation method comprises thefollowing steps: dissolving Na2S.9H2O in 20ml ethylene glycol to obtain a solution A; dissolving SbCl3 in 20ml ethylene glycol to obtain a solution B; adding the solution A to the solution B dropwise, and stirring to obtain a solution C; transferring the C solution to a polytetrafluoroethylene-lined autoclave to obtain a synthetic product D; performing centrifugal separation at 10,000 rpm on theolvothermally synthesized product D, washing the olvothermally synthesized product D with deionized water and ethanol, drying the olvothermally synthesized product D at 85 DEG C for 12 h to obtain Sb2S3 nanorod powder, soaking a Sb2S3 nanorod precursor in an organic carbon source solution with certain concentration, performing centrifugal separation and drying to obtain a product E; and placing the product E in an H2 or Ar atmosphere to obtain the carbon-coated tantalum nanotube negative electrode material. The material has the characteristics of high capacity, good cycle performance and highrate capacity, simple preparation process and low cost, and is suitable for large-scale energy storage.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a preparation method and application of a carbon-coated antimony nanotube material for the negative electrode material of a sodium ion battery. Background technique [0002] With the development of large-scale energy storage systems such as trams and smart grids, the disadvantages of lithium-ion batteries are becoming more and more obvious. The limited reserves of lithium resources make the cost higher, which limits its application in large-scale energy storage systems. Due to the growing energy demand, sodium-ion batteries will gradually become an ideal substitute for lithium-ion batteries due to their low cost, abundant reserves, and wide distribution. [0003] Due to its high theoretical capacity (660mAh / g), unique folded layer structure, small polarization voltage and moderate working voltage, metal antimony can be used as a negative electrode material for sodium-io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/38H01M4/625H01M4/628H01M10/054Y02E60/10
Inventor 锁国权毕雅欣杨艳玲侯小江冯雷李丹陈华军左玉王祎李妍欣李欢欢朱建锋
Owner 北京博雅合众环保科技有限公司
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