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Method and apparatus for expansion of graphite

A technology of graphite and compression devices, applied in graphene, chemical instruments and methods, chemical/physical/physical-chemical processes of applying energy, etc., and can solve problems such as high price

Pending Publication Date: 2022-05-27
AVADAIN LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Highly Oriented Pyrolytic Graphite (HOPG) is suitable for cathodic stripping, but HOPG is expensive

Method used

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  • Method and apparatus for expansion of graphite
  • Method and apparatus for expansion of graphite
  • Method and apparatus for expansion of graphite

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Embodiment Construction

[0044] figure 1 Apparatus 1 that can be used to produce graphene using the methods described herein is shown. The device 1 includes an electrochemical chamber 100 and electrodes. The electrodes comprise at least one cathode 4 and at least one anode 2 . The device also includes an electrolyte 10 and a voltage or current source 12 . The device includes graphite pellets 6 . The graphite pellets are in electrical contact with the cathode 4 . The device also includes a permeable ceramic membrane 8 . In some embodiments, the ceramic membrane 8 is held in a membrane press 22 . In some embodiments, one or more rods 24 are attached to the film press, and a counterweight 26 may be placed on the rods 24 . The device may include a heat sink 104 .

[0045] The electrochemical chamber 100 is bounded by chamber walls 102 . The electrochemical chamber 100 is large enough to accommodate at least the electrodes, electrolyte and graphite pellets. The electrochemical cell 100 may have a ...

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Abstract

In a first embodiment, a method of exfoliating graphene flakes from a graphite sample includes compressing the graphite sample in an electrochemical reactor and applying a voltage between the graphite sample and an electrode in an electrochemical cell.

Description

Background technique [0001] The present disclosure relates to the production of graphene, including apparatus and methods for expanding graphite into graphene. [0002] Graphite is a crystalline form of elemental carbon where sp 2 The hybrid carbon atoms are arranged in a plane with each carbon atom surrounded by three other carbon atoms at an angle of 120°, forming a hexagonal lattice in a flat sheet. In naturally occurring graphite, these sheets are stacked together layer by layer in an ordered sequence, the so-called "AB stack", where half of the atoms in each layer are located just above the center of the hexagonal ring in the adjacent layer or below. Graphite can have tens to thousands of these layers. [0003] The ideal graphene is a single-layer thick sheet of graphite, infinitely large and free of impurities. However, real-world graphene tends to come in the form of small flakes that are multilayered thick. These flakes often contain impurities such as oxygen atom...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01B32/194C01B32/225C25B1/135C25B9/17C25B9/19C25B11/043C25B11/052C25B11/059C25B11/083B01J19/08
CPCC01B32/19C01B32/194C01B32/225C25B1/135C25B9/17C25B11/043C25B9/19C25B11/083C25B11/052C25B11/059B01J19/087B01J2219/0803B01J2219/0879C25B1/00C25B13/07C25B9/67C25B15/00C25B1/02
Inventor S·洛西尔
Owner AVADAIN LLC
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