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Flexible graphene-based polyimide composite material having film structure, and preparation method and application thereof

A technology of alkenyl polyimide and flexible graphite, which is applied in the fields of materials science and electrochemistry, can solve problems such as limited applications and low specific capacity, and achieve simple methods, good mechanical flexibility, good cycle stability and rate performance Effect

Inactive Publication Date: 2019-05-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a typical carbonyl polymer, its low specific capacity (<300mAh g-1) limits its further application.

Method used

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  • Flexible graphene-based polyimide composite material having film structure, and preparation method and application thereof
  • Flexible graphene-based polyimide composite material having film structure, and preparation method and application thereof
  • Flexible graphene-based polyimide composite material having film structure, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step, preparation of graphene-based polyimide composite material (G@PI):

[0030] (1) Ultrasonic the N-methylpyrrolidone solution (5mL) of 2mg / mL graphene oxide to form a uniformly mixed dispersion;

[0031] (2) Add naphthalenetetracarboxylic dianhydride to the above dispersion, and stir vigorously for half an hour; wherein, the mass-molar ratio of added naphthalenetetracarboxylic dianhydride: ethylenediamine: graphene oxide is 4:8:1.

[0032] (3) Add 890 μL of ethylenediamine with a concentration of 10.56 mg / mL to the above solution, stir vigorously for half an hour, pour the mixed solution into the glass lining, and carry out solvothermal reaction, the reaction temperature is 200 °C, and the reaction time is 24 Hour.

[0033] The second step is to prepare the graphene-based polyimide composite material with film structure (G@PI / RGO):

[0034] (1) The composite material obtained by solvothermal heating is continuously centrifuged by adding deionized water t...

Embodiment 2

[0039] The first step, preparation of graphene-based polyimide composite material (G@PI):

[0040] (1) Ultrasonic the N-methylpyrrolidone solution (5mL) of 2mg / mL graphene oxide to form a uniformly mixed dispersion;

[0041] (2) Add naphthalenetetracarboxylic dianhydride to the above dispersion liquid, and stir vigorously for half an hour; wherein, the mass ratio of added naphthalenetetracarboxylic dianhydride: ethylenediamine: graphene oxide is 2:4:1.

[0042](3) Add 450 μL of ethylenediamine with a concentration of 10.56 mg / mL to the above solution, stir vigorously for half an hour, pour the mixture into the glass lining, and carry out solvothermal reaction. The reaction temperature is 200 ° C, and the reaction time is 24 Hour.

[0043] The second step is to prepare the graphene-based polyimide composite material with film structure (G@PI / RGO):

[0044] (1) The composite material obtained by solvothermal heating is continuously centrifuged by adding deionized water to repl...

Embodiment 3

[0048] The first step, preparation of graphene-based polyimide composite material (G@PI):

[0049] (1) Ultrasonic the N-methylpyrrolidone solution (5mL) of 2mg / mL graphene oxide to form a uniformly mixed dispersion;

[0050] (2) Add naphthalene tetracarboxylic dianhydride to the above dispersion liquid, and stir vigorously for half an hour; wherein, the mass-dosage ratio of added naphthalene tetracarboxylic dianhydride: ethylenediamine: graphene oxide is 3:6:1.

[0051] (3) Add 670 μL of ethylenediamine with a concentration of 10.56 mg / mL to the above solution, stir vigorously for half an hour, pour the mixed solution into the glass lining, and carry out solvothermal reaction, the reaction temperature is 200 °C, and the reaction time is 24 Hour.

[0052] The second step is to prepare the graphene-based polyimide composite material with film structure (G@PI / RGO):

[0053] (1) The composite material obtained by solvothermal heating is continuously centrifuged by adding deioniz...

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Abstract

The invention discloses a flexible graphene-based polyimide composite material having a film structure, and a preparation method and application thereof. The method comprises using the graphene with asingle-layer carbon atom structure as a skeleton carrier; polymerizing a polyimide polymer in situ on the graphene skeleton by a solvothermal method; then introducing a graphene oxide which is similar in mass to the reacted graphene oxide for suction filtration film formation, and obtaining a film-shaped graphene-based polyimide composite film material by carbonization under a nitrogen atmosphere. The polyimide obtained by the method is evenly supported between the graphene sheets, and the addition of the sheet graphene oxide not only improves the electrical conductivity of the composite material, but also provides the composite material with good flexibility. The method has a simple process, mild conditions and low cost. The method provides good experimental data and theoretical supportfor the research and application of graphene / polyimide materials in the field of electrochemistry.

Description

technical field [0001] The invention belongs to the field of material science and electrochemical technology, and specifically relates to a flexible graphene-based polyimide composite material with a film structure, a preparation method and an application thereof. Background technique [0002] With the increasingly prominent energy and environmental issues, the new energy industry has received more and more attention. The hybrid electric vehicle and electric vehicle industries are developing rapidly, and lithium-ion batteries are widely used as an important energy storage device. Lithium-ion batteries have the advantages of high energy density, good cycle performance and no memory effect, and are considered to be one of the most effective energy storage methods at present. [0003] Lithium-ion batteries are energy storage devices composed of positive electrodes, negative electrodes, separators and electrolytes, among which electrode materials are the key factors determining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16
CPCY02E60/10
Inventor 韩生常宾黄燕山刘凤茹蔺华林马健孙瑶馨康佳玲
Owner SHANGHAI INST OF TECH
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