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

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