Preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles, and application thereof

A nano-composite particle, manganese oxide technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of complex preparation methods, many by-products, and difficult to repeat, and achieve high cycle stability, prevent The effect of agglomeration, high power density

Active Publication Date: 2016-05-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, carbon-coated metal oxides are mainly synthesized by chemical methods, the preparation method is complicated, there are many by-products and it is not easy to repeat

Method used

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  • Preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles, and application thereof
  • Preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles, and application thereof
  • Preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 50g of metal manganese powder and press it into a block, put it in the automatic control DC arc metal nano powder production equipment to evaporate, and at the same time feed methane and argon with a ratio of 1:2, and the total pressure is 3×10 4 Pa, to obtain a carbon-coated manganese nanocomposite particle precursor whose outer shell is carbon and manganese core; put the carbon-coated manganese nanocomposite particle precursor into a vacuum tube furnace to dry, then evacuate and feed oxygen, at 300 ° C Heat treatment for 4 hours, and cool to room temperature to obtain carbon-coated manganese oxide nanocomposite particles.

[0042] The above-mentioned carbon-coated manganese oxide nanocomposite particles are made into electrodes of a supercapacitor, dispersed in ethanol at a mass ratio of 95:5 as active material: polyvinylidene fluoride, baked into a semi-dry state in a drying box, coated with On the nickel foam, it is pressed under a pressure of 10MPa to make a s...

Embodiment 2

[0048] Take 100g of metal manganese powder and press it into a block, place it in the automatic control direct current arc metal nano powder production equipment to evaporate, and at the same time feed butene and argon with a ratio of 1:1, the total pressure is 9×10 4 Pa, to obtain a carbon-coated manganese nanocomposite particle precursor whose outer shell is carbon and manganese core; put the carbon-coated manganese nanocomposite particle precursor into a vacuum tube furnace to dry, then vacuumize and feed oxygen, at 400 ° C Heat treatment for 4 hours, and cool to room temperature to obtain carbon-coated manganese oxide nanocomposite particles.

[0049] The above-mentioned carbon-coated manganese oxide nanocomposite particles are made into electrodes of supercapacitors, dispersed in methyl acetate according to the mass ratio of active material: polyvinylidene fluoride of 90:10, and baked into a semi-dry state in an oven , coated on foam nickel, pressed under a pressure of 15...

Embodiment 3

[0051] Take 150g of metal manganese powder and press it into a block, place it in an automatic control direct current arc metal nano powder production equipment to evaporate, and at the same time feed propylene and argon with a ratio of 4:3, and the total pressure is 7×10 4 Pa, to obtain a carbon-coated manganese nanocomposite particle precursor whose outer shell is carbon and manganese core; put the carbon-coated manganese nanocomposite particle precursor into a vacuum tube furnace to dry, then vacuumize and feed oxygen, at 350 ° C Heat treatment for 4 hours, and cool to room temperature to obtain carbon-coated manganese oxide nanocomposite particles.

[0052] The above-mentioned carbon-coated manganese oxide nanocomposite particles are made into electrodes of supercapacitors, dispersed in ethyl acetate at a mass ratio of 88:12 by active material: polytetrafluoroethylene, and baked into a semi-dry state in an oven. , coated on nickel foam, pressed under a pressure of 5MPa to ...

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Abstract

The present invention provides a preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles. The method comprises: an automatically controlling direct current arc metal nanometer powder production device is employed; the appropriate amount of metal manganese or manganese alloy raw materials is added; blocky metal manganese or manganese alloy materials are evaporated in the inert gas and mixing atmosphere containing carbon gas in a certain proportion; precursors of carbon coating manganese nanocomposite particles or carbon coating manganese alloy nanocomposite particles are obtained; the precursors are subjected to heating and oxidation treatment in the reaction atmosphere; and the carbon coating manganese nanocomposite particles or carbon coating manganese alloy nanocomposite particles are obtained. The nanocomposite particles prepared through the preparation method of shell-core carbon coating manganese nanocomposite particles and hell-core carbon coating manganese alloy oxide nanocomposite particles has a shell-core-type structure which takes graphitic carbon as a shell and takes manganese and manganese alloy oxide as a core, with electrical double-layer capacitances and the fake capacitance, so that the capacity of the electrodes of a supercapacitor is greatly improved.

Description

technical field [0001] The invention belongs to the field of preparation technology and application of nanometer materials, and relates to a preparation method of a core-shell type carbon-coated manganese and its alloy oxide nanocomposite particles, and an application as a supercapacitor electrode material. Background technique [0002] Supercapacitors (also known as electrochemical capacitors) have the advantages of high safety factor, long cycle life, high power density, fast charge and discharge speed, wide operating temperature range, safe and non-toxic materials, and green environmental protection. They are considered to be the most useful in the 21st century. One of the energy sources of the outlook. The most widely used electrode materials for supercapacitors are carbon materials with porous structure and high specific surface area, such as activated carbon, carbon fiber, carbon black, carbon aerogel, carbon nanotubes, and graphene. As electrode materials for superca...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/46H01G11/86
CPCY02E60/13H01G11/86H01G11/24H01G11/30H01G11/32H01G11/46
Inventor 黄昊王玲玲拉蒙余洁意董星龙吴爱民
Owner DALIAN UNIV OF TECH
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