NiS2 mesoporous nanosphere material, preparation method thereof and application

A nanosphere and mesoporous technology, applied in the fields of nanomaterials and electrochemistry, to achieve low production costs, improve cycle stability, and slow down severe structural damage

Active Publication Date: 2017-09-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, by controlling the charge-discharge cut-off voltage and selecting a suitable ele

Method used

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  • NiS2 mesoporous nanosphere material, preparation method thereof and application
  • NiS2 mesoporous nanosphere material, preparation method thereof and application
  • NiS2 mesoporous nanosphere material, preparation method thereof and application

Examples

Experimental program
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Example Embodiment

[0031] Example 1:

[0032] NiS 2 The preparation method of mesoporous nanosphere material includes the following steps:

[0033] 1) Measure a certain amount of ethylene glycol solution and disperse in an appropriate amount of deionized water. The ratio of ethylene glycol to deionized water in the homogeneous mixed solution is 1:1, and stir until uniform;

[0034] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) powder to the solution obtained in step 1), the concentration of which is 0.006g mL in the solution -1 , Stir until completely dissolved;

[0035] 3) Slowly add a certain amount of C to the obtained in step 2) 4 H 6 O 4 Ni·4H 2 O powder, its concentration in the solution is 0.02mmolmL -1 , Magnetic stirring until completely dissolved;

[0036] 4) Add a certain amount of Na in the solution obtained in step 3) at a nickel / sulfur molar ratio of 1 / 6 2 S 2 O 3 ·5H 2 O, magnetically stirred until completely dissolved;

[0037] 5) Transfer the solution obtained in step 4...

Example Embodiment

[0041] Example 2:

[0042] NiS 2 The preparation method of mesoporous nanosphere material includes the following steps:

[0043] 1) Measure a certain amount of ethylene glycol solution and disperse in an appropriate amount of deionized water. The ratio of ethylene glycol to deionized water in the homogeneous mixed solution is 1:1, and stir until uniform;

[0044] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) powder to the solution obtained in step 1), the concentration of which in the solution is 0.008g mL -1 , Stir until completely dissolved;

[0045] 3) Slowly add a certain amount of C to the obtained in step 2) 4 H 6 O 4 Ni·4H 2 O powder, its concentration in the solution is 0.02mmolmL -1 , Magnetic stirring until completely dissolved;

[0046] 4) Add a certain amount of Na in the solution obtained in step 3) at a nickel / sulfur molar ratio of 1 / 6 2 S 2 O 3 ·5H 2 O, magnetically stirred until completely dissolved;

[0047] 5) Transfer the solution obtained in step 4...

Example Embodiment

[0050] Example 3:

[0051] NiS 2 The preparation method of mesoporous nanosphere material includes the following steps:

[0052] 1) Measure a certain amount of ethylene glycol solution and disperse in an appropriate amount of deionized water. The ratio of ethylene glycol to deionized water in the homogeneous mixed solution is 1:1, and stir until uniform;

[0053] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) powder to the solution obtained in step 1), the concentration of which is 0.01g mL in the solution -1 , Stir until completely dissolved;

[0054] 3) Slowly add a certain amount of NiCl to the result of step 2) 2 ·6H 2 O, its concentration in the solution is 0.02mmolmL -1 , Magnetic stirring until completely dissolved;

[0055] 4) Add a certain amount of Na in the solution obtained in step 3) at a nickel / sulfur molar ratio of 1 / 6 2 S 2 O 3 ·5H 2 O, magnetically stirred until completely dissolved;

[0056] 5) Transfer the solution obtained in step 4) to a polytetraf...

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Abstract

The invention relates to a NiS2 mesoporous nanosphere material and a preparation method thereof. The material can serve as a long-life and high-rate sodium-ion battery negative electrode active material, a plurality of NiS2 subunit nano-particles are regularly stacked to form mesoporous nanosphere structures with uniform shapes, mesopores are formed among the NiS2 subunit nano-particles, the sizes of the mesopores are mainly distributed within the range of 3-4 nanometers, mesoporous nanospheres are free from agglomeration and good in dispersity, the diameters of the NiS2 subunit nano-particles are 150-200 nanometers, and the specific surface area of each mesoporous nanosphere is 49.1m<2>g<1>. The material has the advantages that the NiS2 mesoporous nanosphere material is successfully synthesized and shows excellent high-rate performance, cycling stability and long service life when serving as the sodium-ion battery negative electrode active material, and the material is a potential applied material for a high-power and long-life sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and specifically relates to a NiS 2 A mesoporous nanosphere material and a preparation method thereof, the material can be used as a long-life, high-rate sodium-ion battery negative electrode active material. Background technique [0002] Energy is the material basis supporting the progress of the entire human civilization. With the rapid development of social economy, the dependence of human society on energy continues to increase. At present, traditional fossil energy sources such as coal, oil, and natural gas provide the main energy sources for human society. The consumption of fossil energy not only makes it increasingly exhausted, but also has a significant impact on the environment. Therefore, changing the existing unreasonable energy structure has become the primary problem facing the sustainable development of human society. At present, the vigorously develo...

Claims

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Application Information

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IPC IPC(8): C01G53/11B82Y30/00H01M4/58H01M10/054
CPCB82Y30/00C01G53/11C01P2002/72C01P2004/03C01P2004/32C01P2004/61C01P2004/62H01M4/5815H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 麦立强孙睿敏刘思捷安琴友
Owner WUHAN UNIV OF TECH
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