Preparation method and applications of carbon nano-tube-supported transition metal oxide material

A technology of carbon nanotubes and transition metals, applied in the field of material chemistry, can solve the problems of high cost and complicated process, and achieve the effect of low cost, simple preparation process and uniform shape

Inactive Publication Date: 2018-10-19
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of the present invention is simple, low in cost, good in repeatability, harmless to the environment, and can realiz

Method used

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  • Preparation method and applications of carbon nano-tube-supported transition metal oxide material
  • Preparation method and applications of carbon nano-tube-supported transition metal oxide material
  • Preparation method and applications of carbon nano-tube-supported transition metal oxide material

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Experimental program
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Embodiment 1

[0039] The preparation process of CNTs loaded transition metal oxide material containing Mn element doping is as follows:

[0040] (1) Anneal the CNTs. The annealing temperature of the carbon nanotubes is 500°C, the time is 30min, and the heating rate is 3°C / min. Then, dissolve, ultrasonic, and filter to form a film. The ultrasonic power of the carbon nanotubes is 225W, and the ultrasonic time is 30min ( Purpose: CNTs are evenly dispersed in the solution), and the suction filter carbon membrane is cut into a circular carbon membrane with a diameter of 12mm and a weight of about 1.2±0.05mg.

[0041] (2) Dissolve 1.74g of cobalt nitrate hexahydrate, 0.436g of nickel nitrate hexahydrate, 0.37g of ammonium fluoride, and 1.2g of urea in 80ml of deionized water, and form a pink solution under magnetic stirring;

[0042] (3) Add 0.151g of manganese chloride (at this time, the molar ratio of cobalt nitrate hexahydrate to manganese chloride is 1:0.2) into step 2), stir it with magnetic...

Embodiment 2

[0048] The preparation process of CNTs-loaded transition metal oxide materials containing different proportions of Mn doped is as follows:

[0049] (1) Anneal the CNTs. The annealing temperature of the carbon nanotubes is 500°C, the time is 30min, and the heating rate is 3°C / min. Then, dissolve, ultrasonic, and filter to form a film. The ultrasonic power of the carbon nanotubes is 225W, and the ultrasonic time is 30min ( Purpose: CNTs are evenly dispersed in the solution), and the suction filter carbon membrane is cut into a circular carbon membrane with a diameter of 12mm and a weight of about 1.2±0.05mg.

[0050] (2) Dissolve 1.74g of cobalt nitrate hexahydrate, 0.436g of nickel nitrate hexahydrate, 0.37g of ammonium fluoride, and 1.2g of urea in 80ml of deionized water, and form a pink solution under magnetic stirring.

[0051] (3) Add manganese chloride (at this time, the molar ratios of cobalt nitrate hexahydrate and manganese chloride are: 1:0.5, 1:0.1, 1:0.4 respectivel...

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Abstract

The invention relates to a preparation method and applications of a carbon nano-tube-supported transition metal oxide material. The preparation method comprises: annealing CNTs, dissolving, carrying out ultrasonic treatment, and carrying out suction filtration and film forming; dissolving 1.74 g of cobalt nitrate hexahydrate, 0.436 g of nickel nitrate hexahydrate, manganese chloride, ammonium fluoride, urea and cetyltrimethylammonium bromide in 80 ml of deionized water, wherein a molar ratio of cobalt nitrate hexahydrate to manganese chloride is 0.05-0.4, and a molar ratio of cobalt nitrate hexahydrate to ammonium fluoride to urea to cetyltrimethylammonium bromide is 6:9:20:4; and transferring the formed solution and the carbon nano-tubes into a reaction kettle, and preparing the carbon nano-tube-supported transition metal oxide material through a hydrothermal method. According to the present invention, the preparation process is simple, the cost is low, the prepared material has advantages of good structure uniformity, large specific surface area and excellent electrochemical performance, and the disadvantages that the cost of the precious metal catalyst is high, the preparation process is complicated and the industrialization is difficult to achieve are overcome.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon nanotube-loaded transition metal oxide material, in particular to the technical field of material chemistry. Oxygen reduction catalysts for metal-air batteries. Background technique [0002] As we all know, the energy crisis caused by excessive exploitation of fossil fuels and resource depletion, as well as the harm caused by the use of these fuels to environmental pollution and human health, is a serious problem facing society today. The resulting high power and high energy density The growing demand for renewable green energy and energy storage devices has rapidly promoted the development of electrochemical energy storage devices. In recent years, metal-air batteries have attracted much attention due to their low operational risk, low emissions, high transport capacity, high energy density, light weight, and environmental friendliness. They are showing unprecedented great cha...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9016H01M4/9083H01M12/06
Inventor 李生娟吴昆
Owner UNIV OF SHANGHAI FOR SCI & TECH
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