Electrochemical method of producing nano-scaled graphene platelets

Zhamu, Aruna; Jang, Joan; Jang, Bor Z.

Title: Electrochemical method of producing nano-scaled graphene platelets

Patent · Tue Sep 03 00:00:00 EDT 2013

OSTI ID:1092763

Zhamu, Aruna; Jang, Joan; Jang, Bor Z.

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.

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Research Organization:: Nanotek Instruments, Inc. (Dayton, OH)

Sponsoring Organization:: USDOE

Assignee:: Nanotek Instruments, Inc. (Dayton, OH)

Patent Number(s):: 8,524,067

Application Number:: 11/881,388

OSTI ID:: 1092763

Country of Publication:: United States

Language:: English

References (16)

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