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Preparation method and application of nitrogen-doped graphene oxide film

A graphene film, graphene film technology, applied in the field of electrochemistry, can solve the problems of short service life, easy corrosion or dissolution, weak stability, etc.

Active Publication Date: 2017-01-18
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing current collectors have poor mechanical properties, weak stability, and are prone to corrosion or dissolution, resulting in a decrease in electronic conductivity with the electrode active material, an increase in the contact resistance between the electrode and the active material, and dissolved metal ions will also cause electrolyte Pollution, leading to battery performance degradation, short service life

Method used

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  • Preparation method and application of nitrogen-doped graphene oxide film
  • Preparation method and application of nitrogen-doped graphene oxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a nitrogen-doped graphene oxide film, comprising the following steps:

[0021] 1) Preparation of graphene oxide film

[0022] Vacuum filter the graphene oxide suspension through a microporous membrane to obtain a filter cake attached to the microporous membrane, soak the filter cake attached to the microporous membrane in an aqueous cross-linking agent solution for 12 minutes, take it out, and peel off the micropore The filter membrane is dried in a vacuum drying oven, and the graphene oxide membrane is obtained after drying;

[0023] 2) Graphene oxide membrane treatment

[0024] Place the graphene oxide film prepared in step 1) in a mixed solution of polyvinyl alcohol and polyaniline, adjust the temperature to 58° C., soak for 20 minutes, and then place it in a vacuum drying oven to dry to obtain the treated graphene oxide film ;

[0025] 3) Graphene oxide film doped with nitrogen

[0026] Add the ammonia source and the graphene oxide film pr...

Embodiment 2

[0029] A method for preparing a nitrogen-doped graphene oxide film, comprising the following steps:

[0030] 1) Preparation of graphene oxide film

[0031] Vacuum filter the graphene oxide suspension through a microporous membrane to obtain a filter cake attached to the microporous membrane, soak the filter cake attached to the microporous membrane in an aqueous cross-linking agent solution for 14 minutes, take it out, and peel off the micropore The filter membrane is dried in a vacuum drying oven, and the graphene oxide membrane is obtained after drying;

[0032] 2) Graphene oxide membrane treatment

[0033] Place the graphene oxide film prepared in step 1) in a mixture of polyvinyl alcohol and polyaniline, adjust the temperature to 52°C, soak for 20 minutes, and then place it in a vacuum drying oven to dry to obtain the treated graphene oxide film ;

[0034] 3) Graphene oxide film doped with nitrogen

[0035] Add the ammonia source and the graphene oxide film prepared in...

Embodiment 3

[0038] A method for preparing a nitrogen-doped graphene oxide film, comprising the following steps:

[0039] 1) Preparation of graphene oxide film

[0040] Vacuum filter the graphene oxide suspension through a microporous membrane to obtain a filter cake attached to the microporous membrane, soak the filter cake attached to the microporous membrane in an aqueous solution of a cross-linking agent for 15 minutes, take it out, and peel off the micropore The filter membrane is dried in a vacuum drying oven, and the graphene oxide membrane is obtained after drying;

[0041] 2) Graphene oxide membrane treatment

[0042] Place the graphene oxide film prepared in step 1) in a mixed solution of polyvinyl alcohol and polyaniline, adjust the temperature to 60°C, soak for 20 minutes, and then place it in a vacuum drying oven to dry to obtain the treated graphene oxide film ;

[0043] 3) Graphene oxide film doped with nitrogen

[0044] Add the ammonia source and the graphene oxide film...

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Abstract

The invention provides a preparation method and application of a nitrogen-doped graphene oxide film. The preparation method comprises the steps of preparation of a graphene oxide film, treatment of the graphene oxide film, nitrogen doping of the graphene oxide film and the like, and particularly comprises the steps: vacuum-filtering a graphene oxide suspension, soaking the filter cake in a mixed solution of a cross-linking agent, polyvinyl alcohol and polyaniline, carrying out drying treatment to obtain the graphene oxide film, and then mixing the graphene oxide film with a nitrogen source, to obtain a nitrogen-doped graphene oxide film precursor; and then carrying out heating, drying, heat treatment and other steps to obtain the nitrogen-doped graphene oxide film. The prepared nitrogen-doped graphene oxide film has the advantages of good stability, high electric conductivity, and strong mechanical properties; a supercapacitor with the nitrogen-doped graphene oxide film as a current collector has the advantages of large energy storage capacity and long service life.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a method for preparing a nitrogen-doped graphene oxide film and an application thereof. Background technique [0002] The current collector is a structure or part that collects current. Its main function is to collect the current generated by the active material, provide electron channels, accelerate charge transfer, and improve the coulombic efficiency of charge and discharge. The current collector is an important part of the battery. It is not only the carrier of the positive and negative active materials, but also the collector and transporter of electrons. The adhesion of the electrode active material on it, its compatibility with the electrolyte and the interface chemistry Behavior directly affects battery performance. The existing current collectors have poor mechanical properties, weak stability, and are prone to corrosion or dissolution, resulting in reduced ele...

Claims

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Application Information

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IPC IPC(8): C01B32/198H01G11/68H01M4/66
CPCC01B2204/04C01B2204/22C01B2204/26C01P2004/80H01G11/68H01M4/663Y02E60/10Y02E60/13
Inventor 汪洋陈启志李国春肖美玲
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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