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Preparation method of MOF-5/PPy/GO nano material and application of MOF-5/PPy/GO nano material in supercapacitor

A MOF-5, 1. MOF-5 technology, applied in the field of supercapacitors, can solve the problems of limiting the application of MOF-5 derivative materials, poor conductivity, poor cycle stability, etc., to achieve improved capacitance performance and high electrical conductivity , high electrical conductivity and structural stability

Active Publication Date: 2022-05-06
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of material has high capacitance and high power density, but as a capacitor electrode material, it has poor conductivity and poor cycle stability. These problems greatly limit the application of MOF-5 derived materials in the field of supercapacitor energy storage.

Method used

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  • Preparation method of MOF-5/PPy/GO nano material and application of MOF-5/PPy/GO nano material in supercapacitor
  • Preparation method of MOF-5/PPy/GO nano material and application of MOF-5/PPy/GO nano material in supercapacitor
  • Preparation method of MOF-5/PPy/GO nano material and application of MOF-5/PPy/GO nano material in supercapacitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1MOF-5 / PPy / GO nanometer material

[0033] (1) The preparation method is as follows:

[0034] 1) Preparation of GO nanosheets by Hummers method: 67.5mL of concentrated sulfuric acid, 2.0g of high-purity graphite and 1.6g of NaNO were sequentially added into a three-neck flask 3 , Stir evenly, keep the system temperature below 5°C, slowly and continuously add 9gKMnO to the mixed solution within 1h 4 , then placed in a 36°C water bath to react for 0.5h, after two weeks at room temperature, diluted with 560mL of 60°C water, and added dropwise with H 2 o 2 Until the solution is bright yellow, centrifuge while it is hot (10000rpm), wash to neutrality, and vacuum dry at 50°C to obtain GO nanosheets;

[0035] 2) Preparation of PPy / GO nanosheets: Add 0.2g GO nanosheets to 100mL deionized water, ultrasonically disperse, then add 0.2g pyrrole (Py), add 0.6g FeCl after ultrasonically dispersed 3 ·6H 2 O, continue to sonicate for 0.5h, wash the obtained product with ...

Embodiment 2

[0042] Example 2 Modified electrodes based on MOF-5 / PPy / GO nanomaterials

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

[0044] 1) Preparation of composite modifier: take 8 mg of the dry MOF-5 / PPy / GO nanomaterial prepared in Example 1, add 1 mg of acetylene black, 1 mg of tetrafluoroethylene and 1 mL of absolute ethanol, and ultrasonically disperse for 30 minutes to obtain a black suspension The turbid liquid is the composite modifier, which is reserved;

[0045] 2) Electrode treatment: ultrasonically wash a 1cm×1.5cm stainless steel sheet with acetone, absolute ethanol and water for 30 minutes, and then dry it for later use;

[0046] 3) Preparation of modified electrode: Use a pipette to pipette 0.125mL of the composite modifier prepared in step 1), drop-coat it on the surface of the stainless steel sheet treated in step 2), and dry it at 60°C for 12h to obtain MOF-5 / PPy / GO modified electrodes.

[0047] (2) Electrochemical performance test

[0048] 1. Research on ch...

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Abstract

The invention discloses a preparation method of an MOF-5 / PPy / GO nano material and an application of the MOF-5 / PPy / GO nano material in the aspect of a supercapacitor. The preparation method comprises the following steps: performing deposition reaction on 4-bromomethyl benzoic acid modified polypyrrole / graphene oxide, Zn < 2 + > and terephthalic acid at 80 DEG C for 48 hours to prepare an MOF-5 / PPy / GO nano material with a specific structure, and then coating a stainless steel sheet with the MOF-5 / PPy / GO nano material subjected to vacuum drying to prepare the modified electrode based on the MOF-5 / PPy / GO nano material. Due to the unique composite structure of the electrode material, the carrier effectively increases the specific surface area and the conductivity of the MOF, and the rate capability and the cycle life of the composite electrode material in an aqueous electrolyte are effectively improved. As an electrode current collector substrate, the electrode current collector substrate shows good electrochemical energy storage performance such as high specific capacitance when applied to a supercapacitor, and has a potential application prospect in the field of energy storage devices.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and in particular relates to a preparation method of MOF-5 / PPy / GO nanometer material and its application in supercapacitors. Background technique [0002] Due to the ever-increasing demand for energy, supercapacitors exhibit outstanding and unique properties among numerous electrochemical storage systems. Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device that can store a large amount of charge, transmit at high power ratings, have high power density and excellent safety factor, and have a wide range of applications in the field of energy storage application prospects. [0003] A supercapacitor consists of a positive electrode, a negative electrode, a current collector, an electrolyte, and a separator. Among them, the electrode material is the carrier of charge storage, which determines the main performance of supercapacitors. At present, the low en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22H01G11/36H01G11/26H01G11/48H01G11/86
CPCH01G11/22H01G11/36H01G11/26H01G11/48H01G11/86Y02E60/13
Inventor 茆卉柳金池张帅宋溪明
Owner LIAONING UNIVERSITY
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