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Preparation method and application of carbon coated porous cobaltosic oxide nanometer particles

A technology of cobalt trioxide nanometer and cobalt trioxide, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrochemical generators, etc., can solve problems such as low conductivity, limited application, and volume expansion, and achieve Low cost, simple preparation process, and good repeatability

Inactive Publication Date: 2018-10-23
佛山市利元合创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their own disadvantages such as low electrical conductivity and severe volume expansion during charge and discharge limit their applications in high-performance energy storage devices.

Method used

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  • Preparation method and application of carbon coated porous cobaltosic oxide nanometer particles
  • Preparation method and application of carbon coated porous cobaltosic oxide nanometer particles
  • Preparation method and application of carbon coated porous cobaltosic oxide nanometer particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing carbon-coated porous cobalt trioxide nanoparticles, comprising the following steps:

[0030] (1) 10mmol cobalt nitrate was placed in a mortar and ground, then 15mmol oxalic acid was added into the mortar and ground together for 1 hour to obtain a pink slurry; the resulting slurry was washed with a large amount of water and dried, and the obtained The material was calcined in an air atmosphere in a temperature-programmed tube furnace at 2 °C min -1 After the heating rate rises to 400°C for 2 hours, and at 5°C min -1 Obtain porous tricobalt tetroxide after the cooling rate is cooled to room temperature;

[0031] (2) Weigh 0.06g of glucose and add a small amount of water in the mortar to dissolve the glucose, then add 0.3g of the porous tricobalt tetroxide obtained in (2) into the mortar and grind together for 0.5h, adding an appropriate amount of anhydrous Ethanol, utilizing the volatilization of ethanol to take away the moisture in the mixture, t...

Embodiment 2

[0039] This example differs from Example 1 in that the molar ratio of cobalt nitrate hexahydrate and oxalic acid dihydrate described in step (1) is 1:1, and other conditions are the same as in Example 1.

Embodiment 3

[0041] This example differs from Example 1 in that the molar ratio of cobalt nitrate hexahydrate and oxalic acid dihydrate described in step (1) is 1:2, and other conditions are the same as in Example 1.

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Abstract

The invention relates to a preparation method of carbon coated porous cobaltosic oxide nanometer particles and application of the carbon coated porous cobaltosic oxide nanometer particles as electrodematerials. The method comprises the following steps of (1) putting cobalt nitrate and oxalic acid; performing mixing and grinding to obtain pink pulp; washing the obtained pulp by water; then, performing drying; next, performing calcination in the air atmosphere to obtain the porous cobaltosic oxide; (2) dissolving carbon source precursors by a small amount of water; next, adding the obtained materials and the porous cobaltosic oxide into ethanol; performing uniform grounding; putting the obtained mixture into a baking oven; performing drying; (3) transferring the mixture obtained in the step(2) into a program temperature rise tubular furnace; in the protection atmosphere, performing temperature rise carbonization to obtain the carbon coated porous cobaltosic oxide nanometer particles. The preparation method of the electrode material is simple; the cost is low; when the particles are applied to lithium ion batteries; compared with pure cobaltosic oxide nanometer particles, the excellent circulation performance and power performance are shown.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, in particular to a preparation method of carbon-coated porous cobalt trioxide nanoparticles and its application in lithium-ion battery electrode materials. Background technique [0002] The continuous exploitation and use of oil resources has caused energy crisis and environmental pollution, which has become the focus of global attention. At present, scientific research institutions, experts and scholars all over the world are developing and exploring new energy or new energy technologies to make energy and the environment sustainable. Among them, the development of lithium-ion batteries in energy storage has attracted more and more attention. Compared with traditional batteries (lead batteries, nickel-cadmium batteries, etc.), they have the advantages of large specific capacity, light weight, and long service life. However, with the development of society, the requirements for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/52H01M10/0525H01G11/26H01G11/46H01G11/32H01G11/86B01J23/75B01J35/10
CPCH01M4/366H01M4/52H01M4/583H01M10/0525H01G11/26H01G11/32H01G11/46H01G11/86B01J23/75B01J35/397B01J35/23B01J35/613Y02E60/10
Inventor 韦丽成袁黎明杨世宏
Owner 佛山市利元合创科技有限公司