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One-dimensional rod-shaped sulfur-copper compound as well as preparation method and application thereof

A compound and rod-shaped technology is applied in the field of one-dimensional rod-shaped sulfur-copper compounds and their preparation, and achieves the effect of simple and fast synthesis method, regular morphology and good stability

Active Publication Date: 2014-10-08
德尔赫斯石墨烯科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many ways to prepare one-dimensional materials, it is still a challenge for us to synthesize one-dimensional materials with uniform physical and chemical properties.

Method used

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  • One-dimensional rod-shaped sulfur-copper compound as well as preparation method and application thereof
  • One-dimensional rod-shaped sulfur-copper compound as well as preparation method and application thereof
  • One-dimensional rod-shaped sulfur-copper compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Material preparation:

[0025] Using the traditional synthesis method, a certain amount of CuSO 4 ·5H 2 O was dissolved in a certain amount of DMSO to prepare a copper sulfate solution with a concentration of 0.0075M, and a uniform light green solution was formed after stirring for 30 minutes. Put the solution in a reaction kettle, put it in a blast oven, heat up to 180°C naturally, react at this temperature for 6h, and take out the material when it drops to room temperature. The black copper sulfide active material can be obtained by repeated centrifugal washing (the washing solvent is preferably carbon tetrachloride).

[0026] Material Characterization:

[0027] Using a scanning electron microscope (HITACHI S-4800) to analyze the particle size of the material, it was obtained figure 1 , it can be seen from the figure that the electrode material is a one-dimensional nanorod, and the diameter of the nanorod is about 100 nm. The crystal structure of the material is ...

Embodiment 2

[0032] Material preparation:

[0033] Using the traditional synthesis method, a certain amount of CuSO 4 ·5H 2 O was dissolved in a certain amount of DMSO to prepare a copper sulfate solution with a concentration of 0.02mol / l, and a uniform light green solution was formed after stirring for 30 minutes. Put the solution in a reaction kettle, put it in a blast oven, heat up to 180°C naturally, react at this temperature for 6h, and take out the material when it drops to room temperature. The black copper sulfide active material can be obtained by repeated centrifugal washing (the washing solvent is preferably carbon tetrachloride).

[0034] Material Characterization:

[0035] Using a scanning electron microscope (HITACHI S-4800) to analyze the particle size of the material, it was obtained Figure 4 , it can be seen from the figure that the electrode material is a one-dimensional nanorod, and the diameter of the nanorod is about 150nm. The crystal structure of the material i...

Embodiment 3

[0040] Prepared by traditional solid-phase mixing method, mix copper powder and sulfur powder with a molar ratio of Cu:S=1:1 evenly, put it into a sealed glass tube with an inert atmosphere, and react in a muffle furnace at 400°C for 3h , and the material was taken out when the temperature was naturally cooled to room temperature. The electrochemical test is the same as in Example 1. The electrode material prepared by the method in Example 1 is charged and discharged at a current density of 100mA / g. The initial discharge capacity is 500mAh / g. After 100 cycles, the reversible capacity is maintained at 372mA / g. The rate is 74%.

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Abstract

The invention discloses a one-dimensional rod-shaped sulfur-copper compound as well as a preparation method and an application thereof and relates to a sulfur-copper compound. The one-dimensional rod-shaped sulfur-copper compound is one-dimensional rod-shaped CuxS, wherein x is greater than or equal to 0 and less than or equal to 2. The preparation method of the sulfur-copper compound comprises the following steps: dissolving inorganic salt of copper in a dimethyl sulfoxide solvent, magnetically stirring to prepare a light green solution, then adding the light green solution into a reaction kettle, subsequently putting the reaction kettle into an air-blowing drying oven for heating and reacting, then centrifugally washing and drying to obtain a black one-dimensional rod-shaped sulfur-copper compound. The one-dimensional rod-shaped sulfur-copper compound can be used for preparing a negative electrode of a lithium ion battery. The one-dimensional rod-shaped sulfur-copper compound is prepared by a solvent thermal synthesis method; the synthesis method is simple and quick; specific surfactants and relevant templates are not required to be added. The prepared material has specific one-dimensional structures; the one-dimensional linear structures can be used for forming a good three-dimensional network structure by cross linking and stacking; the transmission of lithium ion electrons and infiltration of electrolyte are facilitated, so that the one-dimensional rod-shaped sulfur-copper compound has good electro-chemical properties.

Description

technical field [0001] The invention relates to a sulfur copper compound, in particular to a one-dimensional rod-shaped sulfur copper compound and a preparation method and application thereof. Background technique [0002] As a new type of lithium ion anode material, sulfur copper compound has many advantages (Y.Chen; C.Davoisne; J.Tarascon; C.Guery. Growth of single-crystal copper sulfide thin films via electrodeposition in ionic liquid media for lithium ion batteries .J.of Mater Chem.2012,22,5295-5299.): 1. High theoretical capacity; 2. Long and flat electrochemical platform; 3. Good conductivity. However, it still has the following shortcomings to be improved urgently (S.C.Han; M.S.Song; H.Lee; H.S.Kim; H.J.Ahn; J.Y.Lee. Effect of Multiwalled Carbon Nanotubes on Electrochemical Properties of Lithium / Sulfur Rechargeable Batteries.J.Electrochem.Soc. 2003,150, A889-A893.), for example: 1. The capacity decays slowly during the cycle; 2. There is a certain volume change durin...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01G3/12
CPCB82Y30/00C01G3/12H01M4/5815Y02E60/10
Inventor 赵金保李雪石春美
Owner 德尔赫斯石墨烯科技(苏州)有限公司
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