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Sulfur vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material and preparation method thereof

A nitrogen-doped carbon and composite electrode technology, which is applied in the preparation/purification of nickel sulfide, carbon, negative electrodes, etc., can solve the problems of complex process, low production efficiency, and difficulty in large-scale industrial production, so as to improve interstitial diffusion Effect

Active Publication Date: 2021-06-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies generally have disadvantages such as low preparation efficiency, complicated process, and difficulty in large-scale industrial preparation.

Method used

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  • Sulfur vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material and preparation method thereof
  • Sulfur vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material and preparation method thereof
  • Sulfur vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the sulfur-vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material of the present invention comprises the following steps in sequence:

[0033] S1: Dissolve 5mmol of nickel acetate in 20mL of deionized water to obtain a nickel acetate solution; dissolve 5mmol of hexamethylenetetramine in 20mL of ethanol to obtain a hexamethylenetetramine solution;

[0034] S2: Mix the nickel acetate solution and the hexamethylenetetramine solution uniformly by dropping, and then stand and grow at 100° C. for 20 hours to obtain the primary product containing the nickel-based metal organic framework template;

[0035] S3: centrifuge the primary product containing the nickel-based metal organic framework template, wash with deionized water and absolute ethanol three times respectively, to obtain a clean nickel-based metal organic framework template; figure 1 As shown, the nickel-based metal-organic framework template prepared in Example 1 ...

Embodiment 2

[0039] The preparation method of the sulfur-vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material of the present invention comprises the following steps in sequence:

[0040] S1: Dissolve 10mmol of nickel nitrate in 40mL of deionized water to obtain a nickel acetate solution; dissolve 30mmol of hexamethylenetetramine in 40mL of methanol to obtain a hexamethylenetetramine solution;

[0041] S2: The nickel nitrate solution and the hexamethylenetetramine solution were mixed uniformly by dropping, and then left to grow at 80° C. for 24 hours to obtain the primary product containing the nickel-based metal organic framework template;

[0042] S3: centrifuge the primary product containing the nickel-based metal-organic framework template, wash it with deionized water and absolute ethanol three times respectively, and obtain a clean nickel-based metal-organic framework template;

[0043] S4: After mixing the clean nickel-based metal-organic framework template ...

Embodiment 3

[0046] The preparation method of the sulfur-vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material of the present invention comprises the following steps in sequence:

[0047] S1: Dissolve 10mmol of nickel chloride in 50mL of deionized water to obtain a nickel acetate solution; dissolve 70mmol of hexamethylenetetramine in 100mL of acetone to obtain a hexamethylenetetramine solution;

[0048] S2: Mix the nickel chloride solution and the hexamethylenetetramine solution uniformly by dropping, and then stand and grow at 150° C. for 15 hours to obtain the primary product containing the nickel-based metal-organic framework template;

[0049] S3: centrifuge the primary product containing the nickel-based metal-organic framework template, wash it with deionized water and absolute ethanol three times respectively, and obtain a clean nickel-based metal-organic framework template;

[0050] S4: After mixing the clean nickel-based metal-organic framework template ...

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Abstract

The invention relates to a sulfur-vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material and a preparation method thereof. The preparation method sequentially comprises the following steps: S1, dissolving inorganic nickel salt and hexamethylenetetramine in a solvent according to the molar ratio of 1: (1-7), and obtaining an inorganic nickel salt solution and a hexamethylenetetramine solution; S2, uniformly mixing an inorganic nickel salt solution and a hexamethylenetetramine solution in a dropwise adding manner, and then standing and growing at 80-160 DEG C for 12-50 hours to obtain a head product containing a nickel-based metal organic framework template; and S3, carrying out centrifugal separation on the initial product containing the nickel-based metal organic framework template at a speed of 2000-4000 r / min, and respectively washing the initial product with deionized water and absolute ethyl alcohol for 3 times to obtain the clean nickel-based metal organic framework template. The prepared composite electrode material is high in energy storage specific capacity and high in cycling stability, the preparation method is simple, the cost is low, and industrial large-scale application is easy to achieve.

Description

technical field [0001] The invention relates to a sulfur-vacancy nitrogen-doped carbon-coated nickel sulfide composite electrode material, and also relates to the use of nitrogen-doped carbon-doped carbon-coated sulfur-vacancy composite electrode material to prepare circular electrodes for sodium-ion batteries, belonging to the sodium-ion battery negative electrode material technology field. Background technique [0002] Due to the excessive consumption of non-renewable energy, it is imperative to rationally develop and utilize renewable clean energy such as wind energy, solar energy, and geothermal energy. However, all kinds of renewable energy are restricted by geographical and environmental factors, and there are serious randomness and intermittency. Therefore, it is very important to realize the optimal management and large-scale storage of energy. Lithium-ion batteries have been the mainstream in the field of energy storage since they were commercialized, which greatl...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054C01B32/05C01G53/11
CPCH01M4/366H01M4/5815H01M4/625H01M4/628H01M10/054C01G53/11C01B32/05H01M2004/021H01M2004/027Y02E60/10
Inventor 高晓艳张孝杰李东洪坤张强华潘颖韬桂应梅李明鲜吉华玉
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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