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Porous cobalt sulfide and nitrogen-doped carbon composite material and preparation method and application thereof

A composite material, nitrogen-doped carbon technology, applied in nanotechnology, electrochemical generators, electrical components, etc. for materials and surface science, can solve the problem of polluted environment, complex preparation process, and unsatisfactory performance of electrode materials and other problems, to achieve the effect of simple preparation method, simple reaction conditions and large yield

Active Publication Date: 2017-05-17
NANJING NORMAL UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the synthesis method of cobalt sulfide composited with carbon materials reported so far is relatively complex in preparation process and pollutes the environment, and the performance of the obtained electrode materials is not satisfactory.

Method used

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  • Porous cobalt sulfide and nitrogen-doped carbon composite material and preparation method and application thereof
  • Porous cobalt sulfide and nitrogen-doped carbon composite material and preparation method and application thereof
  • Porous cobalt sulfide and nitrogen-doped carbon composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 2mmol cobalt chloride hexahydrate, 2mmol o-phenylenediamine, 4mmol o-vanillin and 5mmol elemental sulfur, grind them in an agate mortar at room temperature, then mix and grind them evenly. The mixture was transferred into a ceramic boat, which was then pushed into a tube furnace under N 2 Atmosphere, at 2°C min -1 Increase the heating rate to 40 °C and maintain at this temperature for 3 hr. Then at 5°C min -1 The heating rate was increased to 600 °C and maintained at this temperature for 4 hours. After cooling down to room temperature with the furnace, a porous nitrogen-doped carbon composite material uniformly embedded with cobalt sulfide nanoparticles (porous cobalt sulfide and nitrogen-doped carbon composite material) is obtained.

[0031] figure 1 It is the X-ray diffraction spectrum of the composite material of cobalt sulfide and nitrogen-doped carbon synthesized in this example. The results show that the composites of cobalt sulfide and nitrogen-doped c...

Embodiment 2

[0038] Weigh 2mmol cobalt chloride hexahydrate, 2mmol o-phenylenediamine, 4mmol o-vanillin and 30mmol elemental sulfur, grind them in an agate mortar at room temperature, then mix and grind them evenly. The mixture was transferred into a ceramic boat, which was then pushed into a tube furnace under N 2 Atmosphere, at 2°C min -1 Increase the heating rate to 40 °C and maintain at this temperature for 3 hr. Then at 5°C min -1 The heating rate was increased to 600 °C and maintained at this temperature for 4 hours. After cooling down to room temperature with the furnace, the porous cobalt sulfide and nitrogen-doped carbon composite material is obtained.

[0039] Similar to Example 1, related characterization and testing were carried out on the prepared composite material of cobalt sulfide and nitrogen-doped carbon, and the results were similar to Example 1.

Embodiment 3

[0041] Weigh 2mmol cobalt chloride hexahydrate, 2mmol o-phenylenediamine, 4mmol o-vanillin and 5mmol elemental sulfur, grind them in an agate mortar at room temperature, then mix and grind them evenly. The mixture was transferred into a ceramic boat, which was then pushed into a tube furnace under N 2 Atmosphere, at 2°C min -1 Increase the heating rate to 60 °C and maintain at this temperature for 3 h. Then at 5°C min -1 The heating rate was increased to 600 °C and maintained at this temperature for 4 hours. After cooling down to room temperature with the furnace, the porous cobalt sulfide and nitrogen-doped carbon composite material is obtained.

[0042] Similar to Example 1, related characterization and testing were carried out on the prepared composite material of cobalt sulfide and nitrogen-doped carbon, and the results were similar to Example 1.

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Abstract

The invention discloses a porous cobalt sulfide and nitrogen-doped carbon composite material and a preparation method and application thereof. The composite material is mainly prepared from the following raw materials of a cobalt salt containing crystal water, o-phenylenedimine, o-vanillin and elemental sulfur. Compared with the prior art, the composite material obtained by the preparation method is used as a positive electrode material or a negative electrode material of a lithium ion battery, and excellent cycle stability and high rate performance are shown; and moreover, the preparation method does not need any solvent and is a green, simple and energy-saving preparation method for an electrode material.

Description

technical field [0001] The invention discloses a porous cobalt sulfide and nitrogen-doped carbon composite material, a preparation method and application thereof, and belongs to the technical field of lithium-ion battery electrode materials. Background technique [0002] With the development of society, the energy crisis is becoming more and more serious, and the environment is deteriorating day by day. People put forward urgent requirements for the development of new energy. Lithium-ion batteries are favored by people because of their advantages such as high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, and wide operating range. They are called the leading power source in the 21st century. [0003] During the development of lithium-ion batteries, people have developed a variety of new electrode materials, cobalt sulfide is one of them, because it has strong electrical conductivity, good thermal stability, and high theoretical ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/0525B82Y30/00
CPCH01M4/364H01M4/5815H01M10/0525B82Y30/00Y02E60/10
Inventor 周益明顾静和吴平张秀奎徐亚辉邓玉峰吴卫荣
Owner NANJING NORMAL UNIVERSITY
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