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N-doped porous carbon-coated Co3O4 composite nano material and preparation method thereof, and application of N-doped porous carbon-coated Co3O4 composite nano material

A technology of nitrogen-doped porous carbon and composite nanomaterials, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems that hinder the commercial application of composite nanomaterials, time-consuming, complex processes, etc. problems, achieve good cycle stability, simple and efficient process, and simplified process

Inactive Publication Date: 2019-07-12
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This preparation method is not only complicated, but also time-consuming, which seriously hinders the nitrogen-doped porous carbon-coated Co 3 o 4 Commercial application of composite nanomaterials

Method used

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  • N-doped porous carbon-coated Co3O4 composite nano material and preparation method thereof, and application of N-doped porous carbon-coated Co3O4 composite nano material
  • N-doped porous carbon-coated Co3O4 composite nano material and preparation method thereof, and application of N-doped porous carbon-coated Co3O4 composite nano material
  • N-doped porous carbon-coated Co3O4 composite nano material and preparation method thereof, and application of N-doped porous carbon-coated Co3O4 composite nano material

Examples

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Embodiment 1

[0052] This implementation discloses a nitrogen-doped porous carbon-coated Co 3 o 4 Composite nanomaterials, comprising the following steps of preparation:

[0053] (1) At room temperature, 249mg of cobalt nitrate and 328mg of 2-methylimidazole were dissolved in 25mL of methanol respectively, the two solutions were mixed together, the mixture was stirred for 5min, and left to stand at room temperature for 24h; centrifuged to prepare The sample was washed three times with methanol, and then dried in an oven at 60 °C for 6 h to obtain a purple precursor.

[0054] (2) The initial temperature of the prepared precursor was 50°C in a nitrogen atmosphere, and the temperature was raised to 600°C at a heating rate of 10°C / min, and then carbonized for 2 hours to obtain nitrogen-doped carbon-coated metal cobalt.

[0055] (3) 25 mg of nitrogen-doped porous carbon-coated cobalt composite nanomaterials were ultrasonically dispersed into 30 mL of deionized water, and then 2 mL of H 2 o 2...

Embodiment 2

[0064] This example discloses a porous carbon-coated Co prepared in Doping Example 1. 3 o 4 Application of composite nanomaterials in lithium-ion battery anodes.

[0065] Coating the obtained doped porous carbon with Co 3 o 4 Composite nanomaterials, acetylene black, and polyvinylidene fluoride PVDF are mixed at a mass ratio of 8:10:10 to form a slurry, and the slurry is evenly coated on the copper foil, and after drying in an oven at 80°C, Cut the copper foil into a circular electrode sheet with a diameter of 14mm; use the doped porous carbon to coat the Co 3 o 4 The circular electrode sheet of the composite nanomaterial is the positive electrode, and the circular metal lithium sheet with a diameter of 14mm is the negative electrode, which is composed of ethylene carbonate EC and diethyl carbonate DEC mixed in a mass ratio of 1:1, with a concentration of 1mol / L lithium hexafluorophosphate LiPF 6 The mixed solution was used as the electrolyte, and a circular polypropylen...

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Abstract

The invention discloses a preparation method of an N-doped porous carbon-coated Co3O4 composite nano material. The method comprises the following steps of: dispersing N-doped carbon-coated metal cobalt into ionized water to obtain a dispersion system; adding H2O2 into the dispersion system to obtain a solution system; setting the solution in a condition at a temperature of 180 DEG C for reaction for 24h; performing washing and drying of reacted solution to obtain a product. The present invention further discloses an N-doped porous carbon-coated Co3O4 composite nano material and the applicationthereof. The method is simple in preparation process, uniform in material morphology and large in specific surface, and has a great application potential in the aspects of lithium ion batteries, electrochemical energy storage, catalysis and the like. The method is simple, efficient, safe and feasible, short in synthesis period, can perform large-scale preparation and is hopeful to be popularizedand industrially applied.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to nitrogen-doped porous carbon-coated Co 3 o 4 Composite technology field. Background technique [0002] With the rapid consumption of global energy and the increasingly serious environmental crisis, people have been committed to the development of sustainable, clean and renewable energy. Lithium-ion batteries are considered to be one of the most efficient energy storage devices due to their high energy density, long cycle stability, and low cost. [0003] Graphite is currently the most commonly used anode material for lithium batteries. However, its low theoretical specific capacity (372mAh / g) is difficult to meet the market's requirements for high-capacity lithium-ion battery anode materials. Co 3 o 4 As the negative electrode material of lithium batteries, transition metal oxides have been used due to their high theoretical capacity (more than 600mAh g -1 ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/0525B82Y30/00H01M10/04
CPCB82Y30/00H01M4/366H01M4/52H01M4/583H01M10/0427H01M10/0525H01M2004/027Y02E60/10Y02P70/50
Inventor 郑方才魏凌志
Owner ANHUI UNIVERSITY
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