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Title: Method for producing thin graphite flakes with large aspect ratios

Abstract

A method for making graphite flakes of high aspect ratio by the steps of providing a strong concentrated acid and heating the graphite in the presence of the acid for a time and at a temperature effective to intercalate the acid in the graphite; heating the intercalated graphite at a rate and to a temperature effective to exfoliate the graphite in discrete layers; subjecting the graphite layers to ultrasonic energy, mechanical shear forces, or freezing in an amount effective to separate the layes into discrete flakes.

Inventors:
 [1]
  1. Kennewick, WA
Publication Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
868662
Patent Number(s):
US 5186919
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; producing; graphite; flakes; aspect; ratios; ratio; steps; providing; strong; concentrated; acid; heating; presence; time; temperature; effective; intercalate; intercalated; rate; exfoliate; discrete; layers; subjecting; ultrasonic; energy; mechanical; shear; forces; freezing; amount; separate; layes; shear forces; temperature effective; ultrasonic energy; aspect ratio; amount effective; aspect ratios; graphite flakes; discrete layer; concentrated acid; shear force; discrete layers; /423/

Citation Formats

Bunnell, L Roy. Method for producing thin graphite flakes with large aspect ratios. United States: N. p., 1993. Web.
Bunnell, L Roy. Method for producing thin graphite flakes with large aspect ratios. United States.
Bunnell, L Roy. Fri . "Method for producing thin graphite flakes with large aspect ratios". United States. https://www.osti.gov/servlets/purl/868662.
@article{osti_868662,
title = {Method for producing thin graphite flakes with large aspect ratios},
author = {Bunnell, L Roy},
abstractNote = {A method for making graphite flakes of high aspect ratio by the steps of providing a strong concentrated acid and heating the graphite in the presence of the acid for a time and at a temperature effective to intercalate the acid in the graphite; heating the intercalated graphite at a rate and to a temperature effective to exfoliate the graphite in discrete layers; subjecting the graphite layers to ultrasonic energy, mechanical shear forces, or freezing in an amount effective to separate the layes into discrete flakes.},
doi = {},
url = {https://www.osti.gov/biblio/868662}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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