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Molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material as well as preparation method thereof and application

A nanotube composite, molybdenum trioxide technology, applied in the field of electrochemistry, can solve the problems of limited material range and long reaction time, and achieve the effects of improving diffusion capacity, high specific capacity, and improving utilization rate

Inactive Publication Date: 2014-07-02
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the use of sol-gel method to coat aluminum oxide on carbon nanotubes is reported, but the range of materials that can be coated by this method is limited, and the reaction time is relatively long
Molybdenum trioxide has also been reported as a positive electrode material for lithium-ion batteries. However, the in-situ composite of molybdenum trioxide prepared by electrochemical deposition on nitrogen-doped carbon nanotubes has not been used as a composite positive electrode material in lithium-ion batteries. See the report

Method used

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  • Molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material as well as preparation method thereof and application
  • Molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material as well as preparation method thereof and application
  • Molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material as well as preparation method thereof and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Sonicate nickel foam in acetone, wash with distilled water, then sonicate with ethanol, and wash with distilled water.

[0031] (2) Slowly add 4ml of hydrogen peroxide solution with a volume fraction of 30% to 1g of molybdenum powder, and fully react at room temperature. After the exothermic reaction is completed, add 50ml of deionized water to dilute, and then let it stand for 12 hours. Electroplating solution; the nickel foam treated in (1) is used as the working electrode, the platinum sheet electrode is used as the counter electrode, and the silver / silver chloride electrode is used as the reference electrode, and the electrochemical deposition is carried out by constant voltage deposition method (voltage is -0.6V , the deposition time is 120s).

[0032] (3) Anneal the molybdenum compound obtained in (2) at 400° C. for 2 hours in an air atmosphere to obtain molybdenum trioxide on the nickel foam.

[0033] (4) Use the 2032 button battery case as the battery packa...

Embodiment 2

[0035] (1) Weigh 100 mg of ferrocene (analytical pure) and 1 g of melamine (analytical pure), mix them and grind them thoroughly in a mortar until they are evenly mixed.

[0036] (2) Nickel foam is placed in acetone for ultrasonication, washed with distilled water, then ultrasonicated with ethanol, and washed with distilled water.

[0037] (3) Put the nickel foam treated in (2) on the stage, put it into the constant temperature zone of the reaction chamber, and pass Ar (80cm 3 / min) as the protective gas and ethylene as the carbon source. After reaching the set temperature of 850°C, slowly add the mixture in (1) into the reaction chamber to obtain a composite structure of nickel foam and nitrogen-doped carbon nanotubes.

[0038] (4) Slowly add 4ml of hydrogen peroxide solution with a volume fraction of 30% to 1g of molybdenum powder, and fully react at room temperature. After the exothermic reaction is completed, add 50ml of deionized water to dilute, and then stand for 12 ho...

Embodiment 3

[0041] (1) Weigh 100 mg of ferrocene (analytical pure) and 1 g of melamine (analytical pure), mix them and grind them thoroughly in a mortar until they are evenly mixed.

[0042] (2) Nickel foam is placed in acetone for ultrasonication, washed with distilled water, then ultrasonicated with ethanol, and washed with distilled water.

[0043] (3) Put the nickel foam treated in (2) on the stage, put it into the constant temperature zone of the reaction chamber, and pass Ar (80cm 3 / min) as the protective gas and ethylene as the carbon source. After reaching the set temperature of 850°C, slowly add the mixture in (1) into the reaction chamber to obtain a composite structure of nickel foam and nitrogen-doped carbon nanotubes.

[0044] (4) Slowly add 4ml of hydrogen peroxide solution with a volume fraction of 30% to 1g of molybdenum powder, and fully react at room temperature. After the exothermic reaction is completed, add 50ml of deionized water to dilute, and then stand for 12 hou...

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Abstract

The invention discloses a molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material as well as a preparation method and application. The preparation method of the molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material comprises the following steps of (1) preprocessing nickel foam; (2) growing a nitrogen-doped carbon nanotube onto a nickel foam substrate by utilizing a chemical vapor deposition method; (3) in-situ compounding molybdenum trioxide onto the nitrogen-doped carbon nanotube by utilizing an electric deposition method; and (4) annealing. The molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material is used as a lithium ion battery positive electrode material. The preparation method is simple in operation, simple in process and applicable to the mass production; the molybdenum trioxide in-situ cladding nitrogen-doped carbon nanotube composite electrode material is high in specific capacity and cycling performance, good in multiplying performance, and is a lithium ion battery positive electrode material with good performance.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a molybdenum trioxide in-situ coated nitrogen-doped carbon nanotube composite electrode material and a preparation method and application thereof. Background technique [0002] Energy, information and materials are the three pillars of the development of modern society. In recent years, with the continuous development of social economy, energy shortage has become the main factor restricting economic development, and the environmental pollution caused by it has also attracted more and more attention. In order to promote sustainable development, all kinds of new green energy must be vigorously developed. As an efficient, safe, and pollution-free new green energy developed at the end of the last century, lithium-ion batteries have attracted widespread attention. Compared with traditional lead-acid batteries and nickel-metal hydride (cadmium) batteries, lithium-ion batteries have the...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/36H01M4/62H01M4/131B82Y30/00B82Y40/00
CPCY02E60/122B82Y40/00H01M4/04H01M4/1393H01M10/0525Y02E60/10
Inventor 崔艳华张辉刘效疆刘昊
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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