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A flexible graphene conductive electrode, preparation method, application and flexible and bendable supercapacitor

A conductive electrode and flexible graphite technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems of incomplete hardness and complicated process of conductive electrodes, and achieve the retention of conductivity and low cost , Improve the effect of energy density and power density

Active Publication Date: 2017-05-10
深圳博磊达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a flexible graphene conductive electrode, which solves the problem that the existing conductive electrode is complicated in technology, needs to add a variety of auxiliary materials, and most of them are hard and incomplete.

Method used

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  • A flexible graphene conductive electrode, preparation method, application and flexible and bendable supercapacitor
  • A flexible graphene conductive electrode, preparation method, application and flexible and bendable supercapacitor
  • A flexible graphene conductive electrode, preparation method, application and flexible and bendable supercapacitor

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Embodiment 1

[0052] The flexible graphene conductive electrode of this embodiment is a flexible electrode made of graphene flakes made of graphite material through electron intercalation-gas phase exfoliation, and then self-assembled from the graphene flakes in a solution. The monolithic size of the graphene sheet is 10nm 2 ~1000μm 2 , the number of carbon atomic layers is 1-100. In the flexible electrode, the mass percentage of graphene material is 100%.

[0053] The preparation method of the flexible graphene conductive electrode of the present embodiment comprises the following steps:

[0054] 1) Take 1 g of lithium hexafluorophosphate and add it to 1000 ml of propylene carbonate. After stirring and dispersing, add 10 g of natural flake graphite material. After stirring and ultrasonically dispersing, mixture A is obtained; the stirring speed is 120 r / min, and the time is 1 h ; The power of the ultrasound is 100W, and the time is 2h;

[0055] 2) Place the mixture A obtained in step 1...

Embodiment 2

[0062] The flexible graphene conductive electrode of this embodiment is a flexible electrode made of graphene flakes made of graphite material through electron intercalation-gas phase exfoliation, and then self-assembled from the graphene flakes in a solution. The monolithic size of the graphene sheet is 10nm 2 ~1000μm 2 , the number of carbon atomic layers is 1-100. In the flexible electrode, the mass percentage of graphene material is 100%.

[0063] The preparation method of the flexible graphene conductive electrode of the present embodiment comprises the following steps:

[0064] 1) Add 30 g of lithium hexafluorophosphate to 1000 ml of propylene carbonate, stir and disperse, then add 40 g of artificial graphite material, stir and ultrasonically disperse to obtain mixture A; the stirring speed is 60 r / min, and the time is 5 h; The power of the ultrasound is 200W, and the time is 1.5h;

[0065] 2) Place the mixture A obtained in step 1) in a closed environment, pass thro...

Embodiment 3

[0069] The flexible graphene conductive electrode of this embodiment is a flexible electrode made of graphene flakes made of graphite material through electron intercalation-gas phase exfoliation, and then self-assembled from the graphene flakes in a solution. The monolithic size of the graphene sheet is 10nm 2 ~1000μm 2 , the number of carbon atomic layers is 1-100. In the flexible electrode, the mass percentage of graphene material is 100%.

[0070] The preparation method of the flexible graphene conductive electrode of the present embodiment comprises the following steps:

[0071] 1) Add 70g of lithium hexafluorophosphate to 1000ml of carbonate (the carbonate is made by mixing 250ml of propylene carbonate and 750ml of ethylene carbonate), after stirring and dispersing, add 60g of natural flake graphite material, after stirring and ultrasonically dispersing , to obtain mixture A; the stirring speed is 100r / min, and the time is 2h; the ultrasonic power is 400W, and the tim...

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Abstract

The invention discloses a flexible graphene conductive electrode, a preparation method, an application and a flexible bendable super-capacitor. The conductive electrode is prepared through following steps: (1) preparing a graphene thin sheet from a graphite material through an electronic intercalation-gas phase stripping method; and (2) preparing the flexible graphene conductive electrode from the graphene thin sheet in a manner of solution self-assembly. The flexible graphene conductive electrode has two-dimensional material performances of graphene materials, maintains a carbon-carbon lattice structure of a graphite flake and integrity of a planar electronic structure, retains a conductivity thereof, is free of a conductive agent for enhancing the performance thereof, can be directly used as an electrochemical energy storage apparatus, such as an cathode electrode and an electrode material in a super-capacitor, is free of addition of any additives and usage of a metal substrate, can reduce manufacturing cost of the electrochemical energy storage apparatus, and greatly increases energy density and power density of a lithium ion battery and the super-capacitor.

Description

technical field [0001] The invention belongs to the technical field of flexible electrodes, specifically relates to a flexible graphene conductive electrode, and also relates to a preparation method and application of the flexible graphene conductive electrode and a flexible and bendable supercapacitor using the flexible graphene conductive electrode. Background technique [0002] Lithium-ion battery is an electrochemical energy storage device with high energy density, high output power, high output voltage, recyclability, and no memory effect. With the aggravation of air pollution, lithium-ion batteries have gradually been paid attention to as the power source of pure electric vehicles and hybrid electric vehicles. [0003] A lithium-ion battery is actually a lithium-ion concentration battery, and the positive and negative electrodes are composed of two different lithium-ion intercalation compounds. When charging, Li + Deintercalation from the positive electrode is interc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/587H01M4/133H01M4/1393H01G11/36H01G11/86
CPCH01G11/36H01G11/86H01M4/133H01M4/1393H01M4/583Y02E60/10Y02E60/13
Inventor 李志
Owner 深圳博磊达新能源科技有限公司
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