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A polypyrrole/nickel hydroxide/nickel foam integrated electrode and its preparation method

A technology of nickel hydroxide and polypyrrole, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor conductivity, unsatisfactory performance, poor cycle performance, etc., and achieve good and controllable morphology , the synthesis method is convenient and fast, and the effect of excellent electrochemical performance

Active Publication Date: 2018-09-07
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two inherent defects: poor cycle performance and poor conductivity lead to unsatisfactory performance when it is used as a supercapacitor electrode material alone

Method used

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  • A polypyrrole/nickel hydroxide/nickel foam integrated electrode and its preparation method
  • A polypyrrole/nickel hydroxide/nickel foam integrated electrode and its preparation method
  • A polypyrrole/nickel hydroxide/nickel foam integrated electrode and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In the first step, weigh 0.1792g of nickel acetate hexahydrate and add it to 40ml of ethanol, stir to dissolve;

[0039] In the second step, immerse the pretreated clean nickel foam substrate in the solution obtained in step 2, and place it in a constant temperature water bath at 60°C for 45 minutes;

[0040] The third step is to calcinate the obtained product in the second step in a tube furnace, the calcining temperature is 275°C, the time is 30min, and the heating rate is 2°Cmin -1 ;

[0041] The fourth step, repeat the first step to the third step 2 times;

[0042] In the fifth step, 0.0873g of nickel nitrate hexahydrate and 0.0845g of hexamethylenetetramine are added to 50ml of deionized water to form a mixed solution, and the substrate obtained in the fourth step is immersed in the solution;

[0043] In the sixth step, transfer the solution in the fifth step to a hydrothermal reaction kettle and react at 120°C for 18 hours. After the reaction is completed and cool...

Embodiment 2

[0048] In the first step, weigh 0.1792g of nickel acetate hexahydrate and add it to 40ml of ethanol, stir to dissolve;

[0049] In the second step, immerse the pretreated clean nickel foam substrate in the solution obtained in step 2, and place it in a constant temperature water bath at 60°C for 45 minutes;

[0050] The third step is to calcinate the obtained product in the second step in a tube furnace, the calcining temperature is 275°C, the time is 30min, and the heating rate is 2°Cmin -1 ;

[0051] The fourth step, repeat the first step to the third step 2 times;

[0052] In the fifth step, 0.1745g of nickel nitrate hexahydrate and 0.0845g of hexamethylenetetramine are added to 50ml of deionized water to form a mixed solution, and the substrate obtained in the fourth step is immersed in the solution;

[0053] In the sixth step, transfer the solution in the fifth step to a hydrothermal reaction kettle and react at 120°C for 18 hours. After the reaction is completed and co...

Embodiment 3

[0059] In the first step, weigh 0.1792g of nickel acetate hexahydrate and add it to 40ml of ethanol, stir to dissolve;

[0060] In the second step, immerse the pretreated clean nickel foam substrate in the solution obtained in step 2, and place it in a constant temperature water bath at 60°C for 45 minutes;

[0061] The third step is to calcinate the obtained product in the second step in a tube furnace, the calcining temperature is 275°C, the time is 30min, and the heating rate is 2°Cmin -1 ;

[0062] The fourth step, repeat the first step to the third step 2 times;

[0063] In the fifth step, 0.1745g of nickel nitrate hexahydrate and 0.0845g of hexamethylenetetramine are added to 50ml of deionized water to form a mixed solution, and the substrate obtained in the fourth step is immersed in the solution;

[0064] In the sixth step, transfer the solution in the fifth step to a hydrothermal reaction kettle and react at 120°C for 18 hours. After the reaction is completed and co...

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Abstract

The invention discloses a polypyrrole / nickel hydroxide / foamed nickel integrated electrode and preparation method thereof. The polypyrrole / nickel hydroxide / foamed nickel integrated electrode is formed by loading foamed nickel with polypyrrole and nickel hydroxide, the total load amount of the polypyrrole and the nickel hydroxide on the foamed nickel is 0.9% to 1.4%, and the mass ratio of the polypyrrole to the nickel hydroxide is 1:3 to 2:1. An electrochemical test is performed on the integrated electrode, the electrode has excellent electrochemical performance, as the amount of polypyrrole increases, the specific capacitance of a material increases first and then decreases, and when the molar ratio of nickel nitrate to hexamine is 1:1 and the pyrrole monomer concentration is 0.05mol L<-1>, the specific capacitance of the electrode under the electric current density of 2A g<-1> reaches up to 2174F g<-1>, and the highest specific capacitance retention rate is achieved.

Description

technical field [0001] The invention belongs to the field of new energy sources of electrochemical supercapacitors, and in particular relates to the preparation of a polypyrrole / nickel hydroxide / nickel foam integrated electrode and the testing of its electrochemical performance. Background technique [0002] In today's society, with the increasing environmental problems caused by the production and utilization of fossil energy, the development of new energy storage and utilization devices is the key to the utilization of renewable new energy, and supercapacitors are one of them. Carbon materials, metal oxides / hydroxides, and conductive polymers are three important types of supercapacitor electrode materials. The specific surface area is a very important performance index of supercapacitor electrode materials. A large specific surface area can provide more active sites during charge and discharge, thereby accelerating charge migration and achieving higher electric double laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/48H01G11/86
CPCY02E60/13
Inventor 雷武易阳郝青丽夏锡锋王风云夏明珠
Owner NANJING UNIV OF SCI & TECH
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