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Co < 2 + >-Zr < 2 + >/(2-MeIm) x-coated PPy/GO nanosheet as well as modified electrode and application thereof

A technology for modifying electrodes and nanosheets, applied in nanotechnology, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of limited application of conductive polymers, poor long-term cycle stability, poor high-power discharge performance, etc., to improve rate performance. and electrochemical stability, improving capacitance performance, and the effect of large electrical conductivity

Active Publication Date: 2022-05-17
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive polymers are easy to synthesize and have high conductivity. However, as capacitor electrode materials, they have large internal resistance, poor high-power discharge performance, and poor long-term cycle stability. These problems greatly limit the use of conductive polymers in supercapacitors. Applications in the field of energy storage

Method used

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  • Co &lt; 2 + &gt;-Zr &lt; 2 + &gt;/(2-MeIm) x-coated PPy/GO nanosheet as well as modified electrode and application thereof
  • Co &lt; 2 + &gt;-Zr &lt; 2 + &gt;/(2-MeIm) x-coated PPy/GO nanosheet as well as modified electrode and application thereof
  • Co &lt; 2 + &gt;-Zr &lt; 2 + &gt;/(2-MeIm) x-coated PPy/GO nanosheet as well as modified electrode and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Co 2+- Zr 2+ / (2-MeIm) x The preparation method of @PPy / GO nanosheets (1) is as follows:

[0034] 1) Preparation of GO nanosheets: Add 67.5mL of concentrated sulfuric acid, 2.0g of high-purity graphite and 1.6g of NaNO into a three-neck flask 3 , and stir evenly, keep the system temperature below 5°C, slowly and continuously add 9gKMnO to the mixed solution within 1h 4 , and then placed in a 36°C water bath for 0.5h. After standing at room temperature for two weeks, dilute with 560mL 60℃ water, add H 2 o 2 Until the solution turns bright yellow, it is centrifuged (rmp=10000) while it is hot, washed to neutrality, and vacuum-dried at 50° C. to obtain GO nanosheets.

[0035] 2) PPy / GO nanosheets: Add 0.2g GO nanosheets to 100mL deionized water for ultrasonic dispersion, then add 0.2g pyrrole (Py), add 0.6g FeCl after ultrasonic dispersion 3 ·6H 2 O, continue to sonicate for 0.5h, wash the obtained product with distilled water and ethanol in turn, centrif...

Embodiment 2

[0042] Example 2 is based on Co 2+ -Zr 2+ / (2-MeIm) x Modified electrodes of @PPy / GO nanosheets

[0043] (1) The preparation method is as follows:

[0044] 1) get the dried Co prepared in 8mg embodiment 1 2+ -Zr 2+ / (2-MeIm) x @PPy / GO nanosheets, add 1mg acetylene black, 1mg polytetrafluoroethylene and 1mL absolute ethanol, ultrasonically disperse for 30min, and obtain a black suspension with a concentration of 8mg / mL, which is the composite modifier and is ready for use.

[0045] 2) Electrode treatment: Cut the nickel foam into a size of 1cm×1.5cm, use 6M hydrochloric acid, absolute ethanol and water to sonicate for 30min, and then dry it for later use.

[0046] 3) Preparation of the modified electrode: pipette 0.125 mL of the composite modifier prepared in step 1), drop-coat it on the surface of a clean nickel foam, let it dry naturally at room temperature, and then press it into a tablet machine.

[0047] (2) Electrochemical performance test

[0048] 1. Co. 2+ -Zr ...

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Abstract

The invention belongs to the field of supercapacitors, and discloses a Co < 2 + >-Zr < 2 + > / (2-MeIm) x (at) PPy / GO nanosheet and a modified electrode and application thereof. The preparation method of the Co < 2 + >-Zr < 2 + > / (2-MeIm) x-coated PPy / GO nanosheet comprises the following steps: under the condition of ultrasonic radiation, performing in-situ chemical polymerization on pyrrole on the GO nanosheet to obtain the PPy / GO nanosheet; the preparation method comprises the following steps: under a heating condition, modifying a PPy / GO nanosheet with 2-chloromethylimidazoline hydrochloride, so as to obtain a 2-MeIm / PPy / GO nanosheet; the preparation method comprises the following steps: dispersing a 2-MeIm / PPy / GO nanosheet and 2-methylimidazole in methanol, sequentially adding cobalt chloride and zirconium chloride, standing, and loading a cobalt-zirconium bimetallic complex onto the 2-MeIm / PPy / GO nanosheet to obtain the Co < 2 + >-Zr < 2 + > / (2-MeIm) x-PPy / GO nanosheet.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and the invention discloses a Co 2+ -Zr 2+ / (2-MeIm) x @PPy / GO nanosheets and their modified electrodes and applications. Background technique [0002] As a new type of energy storage device, supercapacitors have a wide range of application prospects in the field of energy storage due to their advantages such as good safety, high power density, fast charge and discharge speed, and long cycle life. In the study of supercapacitors, electrode materials are the main factors that determine the performance of supercapacitors. [0003] Electrode materials are considered to be an important part of the field of supercapacitors. Many materials such as carbon materials, metal oxides, metal sulfides, conductive polymers, and microporous polymers have been used as electrode materials. Among them, polypyrrole and other conductive polymer electrode materials realize electrical energy storage through the prin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36H01G11/30B82Y30/00B82Y40/00
CPCH01G11/86H01G11/36H01G11/30B82Y30/00B82Y40/00Y02E60/13
Inventor 茆卉张帅柳金池宋溪明
Owner LIAONING UNIVERSITY
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