A kind of super capacitor based on polyaniline-nickel cobalt ferrite and its preparation method

A supercapacitor, nickel-cobalt-iron technology, applied in hybrid capacitor electrodes, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of high charge transfer resistance of nickel-cobalt ferrite materials and reduce nickel-cobalt Ferrite electrochemical performance, small specific capacitance and other issues, to achieve the effect of enhancing electrochemical performance, reducing redox potential and improving stability

Active Publication Date: 2022-01-28
嘉兴砺安贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a supercapacitor based on polyaniline-nickel-cobalt ferrite, which solves the problem that the nickel-cobalt ferrite material has a large charge transfer resistance, poor conductivity, and a small specific capacitance value , resulting in low rate capability and reduced electrochemical performance of nickel-cobalt ferrite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of nickel cobalt ferrite Ni 0.25 co 0.75 Fe 2 o 4 , the preparation method is as follows: add 500mL distilled water to a 1000mL reaction bottle, then weigh 6 parts of anhydrous nickel chloride and 26 parts of anhydrous cobalt chloride and add them to the reaction bottle, and place the reaction bottle in a constant temperature water bath , heated to 50°C and stirred at a constant speed until the solid was dissolved, then weighed 46 parts of sodium citrate and 22 parts of potassium ferricyanide and added them to the reaction flask, and slowly added sodium hydroxide to adjust the pH to 9, then the water bath temperature Raise to 85°C, stir at a constant speed for 5 hours, then transfer the solution in the reaction bottle into a hydrothermal automatic reaction kettle, raise the temperature to 180°C, and react with magnetic stirring for 15 hours. After the reaction is complete, cool the reaction kettle to room temperature, and put the solution Remove the s...

Embodiment 2

[0028] (1) Preparation of nickel cobalt ferrite Ni 0.30 co 0.70 Fe 2 o 4 , the preparation method is as follows: add 500mL distilled water to a 1000mL reaction bottle, then weigh 7 parts of anhydrous nickel chloride and 23 parts of anhydrous cobalt chloride and add them to the reaction bottle, and place the reaction bottle in a constant temperature water bath , heated to 50°C and stirred at a constant speed until the solid was dissolved, then weighed 47 parts of sodium citrate and 23 parts of potassium ferricyanide into the reaction flask, and slowly added sodium hydroxide to adjust the pH to 9, then the water bath temperature Raise to 85°C, stir at a constant speed for 5 hours, then transfer the solution in the reaction bottle into a hydrothermal automatic reaction kettle, raise the temperature to 180°C, and react for 16 hours with magnetic stirring. After the reaction is complete, cool the reaction kettle to room temperature, and dissolve the solution Remove the solvent b...

Embodiment 3

[0031] (1) Preparation of nickel cobalt ferrite Ni 35 co 0.65 Fe 2 o 4 , the preparation method is as follows: add 500mL of distilled water to a 1000mL reaction bottle, then weigh 8 parts of anhydrous nickel chloride and 19 parts of anhydrous cobalt chloride and add them to the reaction bottle, and place the reaction bottle in a constant temperature water bath , heated to 55°C and stirred at a constant speed until the solid was dissolved, then weighed 48 parts of sodium citrate and 25 parts of potassium ferricyanide and added them to the reaction flask, and slowly added sodium hydroxide to adjust the pH to 9, then the water bath temperature Raise to 90°C, stir and react at a constant speed for 6 hours, then transfer the solution in the reaction bottle into a hydrothermal automatic reactor, raise the temperature to 190°C, and react with magnetic stirring for 16 hours. After the reaction is complete, cool the reactor to room temperature, and dissolve the solution Remove the s...

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Abstract

The invention relates to the technical field of supercapacitors, and discloses a polyaniline-nickel-cobalt ferrite-based supercapacitor and a manufacturing method thereof, comprising the following formula raw materials: nickel-cobalt ferrite, 2,6-dicarboxyaniline, an oxidizing agent , metal complexing agent, multi-walled carbon nanotubes. The supercapacitor and its preparation method based on polyaniline-nickel-cobalt ferrite, nickel-cobalt ferrite Ni 0.25‑0.45 co 0.55‑0.75 Fe 2 o 4 Middle Ni 2+ and Co 2+ Adsorption towards the center of the Fe atom forms nanoparticles with a multifaceted cubic structure, which makes the crystal structure more regular and stable, reduces the interface distance between active material particles, accelerates the migration and transmission of electrons and ions, and improves the nickel-cobalt The specific capacitance value and rate performance of ferrite, by coating nickel-cobalt ferrite with polycarboxyaniline with excellent conductivity, reduces the inherent resistance and charge transfer resistance of nickel-cobalt ferrite, and enhances the performance of nickel-cobalt ferrite Conductive properties, thereby improving the rate performance, specific capacitance and electrical cycle performance of the material.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a supercapacitor based on polyaniline-nickel-cobalt ferrite and a manufacturing method thereof. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the characteristics of energy storage of batteries. Supercapacitors are formed between electrodes and electrolytes. A new type of component that stores energy with a double-layer interface. When the electrode is in contact with the electrolyte, due to the Coulomb force, intermolecular force, and interatomic force, a stable and oppositely signed double-layer interface appears at the solid-liquid interface. , An electric double-layer capacitor is formed on the surface of the two electrodes. According to the different electrode materials, the el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/48H01G11/36H01G11/24C01G49/00C08G73/02B82Y30/00B82Y40/00
CPCH01G11/30H01G11/46H01G11/48H01G11/36H01G11/24C01G49/0018C08G73/0266B82Y30/00B82Y40/00Y02E60/13
Inventor 魏福祥员贤荣房延峰
Owner 嘉兴砺安贸易有限公司
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