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Title: Electrochemical method of producing nano-scaled graphene platelets

Abstract

A method of producing nano-scaled graphene platelets with an average thickness smaller than 30 nm from a layered graphite material. The method comprises (a) forming a carboxylic acid-intercalated graphite compound by an electrochemical reaction; (b) exposing the intercalated graphite compound to a thermal shock to produce exfoliated graphite; and (c) subjecting the exfoliated graphite to a mechanical shearing treatment to produce the nano-scaled graphene platelets. Preferred carboxylic acids are formic acid and acetic acid. The exfoliation step in the instant invention does not involve the evolution of undesirable species, such as NO.sub.x and SO.sub.x, which are common by-products of exfoliating conventional sulfuric or nitric acid-intercalated graphite compounds. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.

Inventors:
; ;
Issue Date:
Research Org.:
Nanotek Instruments, Inc. (Dayton, OH)
Sponsoring Org.:
USDOE
OSTI Identifier:
1092763
Patent Number(s):
8,524,067
Application Number:
11/881,388
Assignee:
Nanotek Instruments, Inc. (Dayton, OH)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhamu, Aruna, Jang, Joan, and Jang, Bor Z. Electrochemical method of producing nano-scaled graphene platelets. United States: N. p., 2013. Web.
Zhamu, Aruna, Jang, Joan, & Jang, Bor Z. Electrochemical method of producing nano-scaled graphene platelets. United States.
Zhamu, Aruna, Jang, Joan, and Jang, Bor Z. Tue . "Electrochemical method of producing nano-scaled graphene platelets". United States. https://www.osti.gov/servlets/purl/1092763.
@article{osti_1092763,
title = {Electrochemical method of producing nano-scaled graphene platelets},
author = {Zhamu, Aruna and Jang, Joan and Jang, Bor Z.},
abstractNote = {A method of producing nano-scaled graphene platelets with an average thickness smaller than 30 nm from a layered graphite material. The method comprises (a) forming a carboxylic acid-intercalated graphite compound by an electrochemical reaction; (b) exposing the intercalated graphite compound to a thermal shock to produce exfoliated graphite; and (c) subjecting the exfoliated graphite to a mechanical shearing treatment to produce the nano-scaled graphene platelets. Preferred carboxylic acids are formic acid and acetic acid. The exfoliation step in the instant invention does not involve the evolution of undesirable species, such as NO.sub.x and SO.sub.x, which are common by-products of exfoliating conventional sulfuric or nitric acid-intercalated graphite compounds. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {9}
}

Patent:

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