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Preparation method of supercapacitor electrode material manganese dioxide

一种超级电容器、电极材料的技术，应用在电容器、电解电容器、氧化锰/氢氧化锰等方向，能够解决电极材料放电比电容量低、循环稳定性差等问题，达到解决大规模应用难、高比电容、良好电化学稳定性的效果

Inactive Publication Date: 2014-02-26
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to improve the MnO2 electrode material discharge capacity is low, poor cycle stability and other issues, the present invention has designed a simple , Rapid synthesis of supercapacitor electrode material MnO2 preparation method

Method used

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  • Preparation method of supercapacitor electrode material manganese dioxide
  • Preparation method of supercapacitor electrode material manganese dioxide
  • Preparation method of supercapacitor electrode material manganese dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Take raw material pyrrole and potassium permanganate respectively, and the molar ratio of pyrrole and potassium permanganate is 1:0.6;

[0036] (2) Disperse and dissolve the taken pyrrole monomer into water, stir well to obtain solution A; the volume ratio of pyrrole to water is 1:25;

[0037] (3) dissolving the potassium permanganate in water to obtain solution B; the volume of solution B obtained is 3 times the volume of solution A;

[0038] (4) Slowly adding solution B to solution A, stirring and reacting for 8 hours at a temperature of 5 °C;

[0039] (5) Filtration of the reaction product to obtain a solid powdery precipitate, respectively washing the precipitate with deionized water and ethanol solvent until the filtrate is colorless;

[0040] (6) Vacuum dry the washed solid powder product at 60 °C for 18 h to obtain the electrode material MnO 2 Powder, can be used to prepare supercapacitor cathode material.

Embodiment 2

[0042] The ratio of pyrrole to water by volume is 1:30 to prepare solution A, and potassium permanganate is dissolved in water to prepare solution B, and the volume of the prepared solution B is 3 times the volume of solution A; The molar ratio of potassium permanganate in B is 1:0.7.

[0043] The solution B was slowly added to the solution A, and the reaction was stirred for 6 hours at a temperature of 2 °C;

[0044] The reaction solution was filtered to obtain a solid powder product, which was washed with deionized water and ethanol solvent respectively until the filtrate was colorless;

[0045] Dry the washed solid powder product at 70°C for 14 hours to obtain the electrode material MnO 2 Powder for the preparation of supercapacitor cathode materials.

Embodiment 3

[0047] The volume ratio of pyrrole and water is 1:35 to make A solution, and the volume of the obtained solution B is 2.5 times the volume of solution A; the molar ratio of pyrrole in solution A to potassium permanganate in solution B is 1:0.8 .

[0048] The solution B was slowly added to the solution A, and the reaction was stirred at a temperature of 1 °C for 12 hours;

[0049] The reaction solution was filtered to obtain a solid powder product, which was washed with deionized water and ethanol solvent respectively until the filtrate was colorless;

[0050] Dry the washed solid powder product at 80°C for 24 hours to obtain the electrode material MnO 2 Powder for the preparation of supercapacitor cathode materials.

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Abstract

The invention discloses a preparation method of a supercapacitor electrode material manganese dioxide. The preparation method comprises the following steps: dispersing and dissolving pyrrole in water, fully stirring to obtain a solution A; dissolving potassium permanganate of which molar ratio to pyrrole is defined, in water to obtain a solution B; slowly adding the solution B in the solution A, stirring to react; filtering the reaction product, respectively washing the product with deionized water and ethanol solvent to ensure that the filtrate is colorless; and performing vacuum drying to the washed product at 60 DEG C for 12h to obtain MnO2 powder which is used to prepare the supercapacitor positive electrode material. The method disclosed by the invention is simple and fast, and the prepared MnO2 electrode material is a powdery amorphous material, has high specific capacitance and good electrochemical stability and is a good supercapacitor positive electrode material.

Description

technical field [0001] The invention belongs to a preparation method of a supercapacitor electrode material, in particular to a preparation method of manganese dioxide, a supercapacitor electrode material. Background technique: [0002] Supercapacitor is a new type of energy storage element. It is widely used in starting power supply, pulse power supply, military, mobile communication devices, computers and electric vehicles due to its advantages of large capacity, fast charging and discharging with high current, and long cycle life. and other research fields. According to different energy storage mechanisms, supercapacitors can be divided into the following three types: electric double layer capacitors, faraday pseudocapacitors and hybrid supercapacitors. [0003] Electric double layer capacitors mainly store energy through the electric double layer formed on the interface between electrodes / electrolyte, and this type of capacitor has high power density and excellent cycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C01G45/02H01G9/042B82Y40/00
CPCY02E60/13
Inventor 沈临江王好勇顾大伟
Owner NANJING TECH UNIV
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