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Alpha-phase manganese dioxide nano-rod, and preparation method and application thereof

A technology of manganese dioxide and nanorods, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, electrical components, etc., can solve the problems of unsuitable for large-scale production, complicated process, harsh reaction conditions, etc., and achieve the improvement of fast charging The effects of discharge and service life, simple process, and mild reaction conditions

Inactive Publication Date: 2013-09-11
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of using the above method to prepare manganese dioxide nanorods is that the process is complicated, the reaction conditions are harsh, and the product yield is low, resulting in high product cost and not suitable for large-scale production.

Method used

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  • Alpha-phase manganese dioxide nano-rod, and preparation method and application thereof
  • Alpha-phase manganese dioxide nano-rod, and preparation method and application thereof
  • Alpha-phase manganese dioxide nano-rod, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 0.632g potassium permanganate (4mmol) and 1.187g (6mmol) manganese chloride, dissolve them in 100mL deionized water respectively, slowly add potassium permanganate solution into the manganese chloride solution under vigorous stirring. Weigh 0.063g of potassium dichromate, dissolve it in 50mL of deionized water and add it to the reaction solution, then heat, boil and reflux for 2 hours, cool to room temperature, filter, wash with deionized water 3 times, and dry at 100°. From figure 1 , 2 You can see the α-phase manganese dioxide nanorods with a diameter of about 80nm and a length of about 1.5μm.

[0027] Application example of embodiment 1

[0028] Mix the α-phase manganese dioxide nanorods prepared in Example 1, acetylene black, and polytetrafluoroethylene in a mass ratio of 7:2:1, add an appropriate amount of acetone to fully mix the three, make a slurry, and roll into thin sheets And cut 10 mg thin slices and press them on the nickel foam to make electrode s...

Embodiment 2

[0030] Weigh 0.632g (4mmol) of potassium permanganate and 1.014g (6mmol) of manganese sulfate, dissolve them in 100mL of deionized water, and slowly add the potassium permanganate solution into the manganese sulfate solution under vigorous stirring. Weigh 0.063g of potassium dichromate and dissolve it in 50mL of deionized water and add it to the reaction solution, then heat, boil and reflux for 2 hours, cool to room temperature, filter, wash with deionized water 3 times, and dry at 100°. From Figure 4 α-phase manganese dioxide nanorods with a diameter of about 100 nm and a length of about 1.5 μm can be seen.

[0031] Application example of embodiment 2

[0032] The α-phase manganese dioxide nanorod electrode was prepared according to the method described in the application example of Example 1 and its performance was tested. From Figure 5 , it can be measured that the capacitance value of the α-phase manganese dioxide nanorod electrode is 178F / g when the current is 0.5A / g ...

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Abstract

The invention relates to an Alpha-phase manganese dioxide nano-rod, and a preparation method and the application thereof, and belongs to the technical field of electrode material preparation. The preparation method is characterized in that by taking potassium permanganate as an oxidizing agent, and inorganic manganese salt as a reducing agent, adopting an atmospheric pressure reflux reaction method, adding additives and controlling reaction conditions such as the use amount of the additives, the reflux time, and the like, Alpha-phase manganese dioxide nano-rod with high dispersity and a large specific surface area are prepared, wherein the nano-rod is 50 to 100nm in diameter and 0.5 to 2 micron m in length. By adopting the scheme, the Alpha-phase manganese dioxide nano-rod with high crystallinity can be prepared, the capacity of an electrochemical capacitor is increased, and the performance of quick charge-discharge, service life, and the like of the electric capacitor are improved.

Description

technical field [0001] The invention relates to an α-phase manganese dioxide nanorod and a preparation method and application thereof, belonging to the technical field of electrode material preparation. Background technique [0002] Manganese dioxide is rich in resources and is an important raw material in the fields of energy and electronics, and is widely used in batteries, supercapacitors, photocatalysis and other fields. In particular, the capacitive behavior of manganese dioxide is very similar to noble metals such as ruthenium dioxide, and has a theoretical capacity as high as 1370F / g, so it is considered to be an ideal electrode material for supercapacitors, and it is most likely to replace noble metal oxides. Many of these applications of manganese dioxide are derived from its various crystal forms including α-, β-, δ-, γ-phase. In addition, studies have shown that the performance of manganese dioxide can be significantly improved by constructing one-dimensional str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02B82Y40/00H01G9/042
CPCY02E60/13
Inventor 宋朝霞刘伟赵明
Owner DALIAN NATIONALITIES UNIVERSITY
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