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Graphene-based flexible electrode and preparation method thereof

An alkenyl flexible and graphene technology, applied in the field of electrodes, can solve the problems of complex process, high cost of flexible supercapacitor preparation process, no batch preparation of flexible supercapacitor preparation process, etc., and achieve the effect of simple process

Active Publication Date: 2019-06-04
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The preparation process of the existing flexible supercapacitor is expensive and complicated, and there is no preparation process for batch production of flexible supercapacitors

Method used

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  • Graphene-based flexible electrode and preparation method thereof
  • Graphene-based flexible electrode and preparation method thereof
  • Graphene-based flexible electrode and preparation method thereof

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preparation example Construction

[0025] The common method of electrode preparation is to dissolve the electrode active material in an appropriate solvent to make a suspension electrode ink, and then attach it to a metal current collector or a flexible polymer substrate by printing, spin coating or spraying and then transfer. to the metal current collector. In order to meet the technical requirements, appropriate binders, dispersants, etc. need to be added to the suspension, so that the content of effective active ingredients in the suspension is low and the conductivity is reduced. Moreover, the printing, spin coating, and spraying methods have high requirements on equipment and increase the process cost. Attached to metal current collectors or other types of current collectors, electrodes need to be assembled into a three-dimensional capacitor in the form of an electrode-electrolyte diaphragm-electrode "sandwich". This structural design is not conducive to the development of light, thin, bendable, and wearab...

Embodiment 1

[0045] This embodiment provides a graphene-based flexible electrode and a preparation method thereof, including:

[0046] Weigh the highly conductive graphene slurry and polyaniline powder into an agate ball mill jar, add ethanol and water (1:2, vol%) as a solvent into the ball mill jar, add ball mill beads, and perform ball milling in a ball mill.

[0047] Among them, the plane size of the graphene sheet is 1-15 μm, the thickness of the sheet is -1 . The mass ratio of graphene to polyaniline is 2:1, the ratio of solvent to material in the ball mill tank is 40:1, the mass ratio of ball milling beads to the total mass of liquid material is 1:1, and the particle size of ball milling beads agate is 3mm~10mm mixed beads type, the ball milling time is 6h.

[0048] After the ball milling, the slurry is sieved to remove the ball milling beads, placed in an 80°C blast drying oven, heated and concentrated to a solid content of about 5%, and then scraped and coated on a flexible substr...

Embodiment 2

[0051] This embodiment provides a graphene-based flexible electrode and a preparation method thereof, including:

[0052] Weigh the highly conductive graphene slurry and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) (PH1000 for short) aqueous dispersion in the agate ball mill pot, add ethanol and water to the ball mill pot (1:3, vol%) solution was used as a solvent, adding ball milling beads, and milling in a ball mill. Among them, the plane size of the graphene sheet is 1-15 μm, the thickness of the sheet is -1 . PH1000 is a 1% aqueous dispersion. The mass ratio of graphene to PH1000 (solid content) is 2:1, the ratio of solvent to material in the ball mill tank is 30:1, the mass ratio of ball milling beads to the total mass of liquid is 1.5:1, and the particle size of ball milling beads agate is 3mm ~ 10mm mixed bead type, ball milling time is 10h.

[0053] After the ball milling, the slurry was sieved to remove the ball milling beads, placed in a blast dryin...

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Abstract

The invention relates to a graphene-based flexible electrode and a preparation method thereof, which belong to the technical field of electrodes. The preparation method of the graphene-based flexibleelectrode comprises the steps of: coating an electrode slurry on a substrate in a manner of blade coating, and processing the substrate to obtain an electrode thin film. The electrode slurry comprisesgraphene and an electrochemically active component. The electrode thin film is printed by means of laser to obtain a patterned thin film electrode. The preparation method can prepare the highly conductive electrode thin film which can be blade-coated and does not require a metal current collector and the patterned thin film electrode which is prepared by adopting a laser printing method. The preparation method is simple in process, and the whole process can realize roll-to-roll production expansion. The graphene-based flexible electrode can be prepared into serial / parallel devices or integrated with other flexible terminals without the need for additional metal current collectors. On the other hand, the patterned thin film electrode can be transferred to other substrates according to application requirements, can serve as a multi-electrode integrated and patch-type flexible power source, and can serve as a suitable power source for various flexible electronic equipment such as wearable equipment and skin paste equipment.

Description

technical field [0001] The present application relates to the technical field of electrodes, and in particular to a graphene-based flexible electrode and a preparation method thereof. Background technique [0002] With the advancement of electronic technology, more and more electronic devices are developing in the direction of thinner, flexible and wearable. One of the biggest challenges in the development of flexible electronics is to adapt to thin, light and flexible energy storage devices. Flexible supercapacitors have the advantages of high power density, fast charge and discharge, long cycle life, and good stability, and can be used as an ideal choice for flexible energy storage. [0003] The existing preparation process of flexible supercapacitors is expensive and complicated, and there is no preparation process for mass production of flexible supercapacitors. Contents of the invention [0004] In view of the deficiencies of the prior art, the purpose of the embodi...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/24H01G11/86
Inventor 肖涵刘兆平孙敏潘子昂
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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