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Title: Nano-scaled graphene platelets with a high length-to-width aspect ratio

This invention provides a nano-scaled graphene platelet (NGP) having a thickness no greater than 100 nm and a length-to-width ratio no less than 3 (preferably greater than 10). The NGP with a high length-to-width ratio can be prepared by using a method comprising (a) intercalating a carbon fiber or graphite fiber with an intercalate to form an intercalated fiber; (b) exfoliating the intercalated fiber to obtain an exfoliated fiber comprising graphene sheets or flakes; and (c) separating the graphene sheets or flakes to obtain nano-scaled graphene platelets. The invention also provides a nanocomposite material comprising an NGP with a high length-to-width ratio. Such a nanocomposite can become electrically conductive with a small weight fraction of NGPs. Conductive composites are particularly useful for shielding of sensitive electronic equipment against electromagnetic interference (EMI) or radio frequency interference (RFI), and for electrostatic charge dissipation.
 [1] ;  [1] ;  [1]
  1. (Centerville, OH)
Publication Date:
OSTI Identifier:
Report Number(s):
US patent application 12/002,278
DOE Contract Number:
Resource Type:
Research Org:
Nanotek Instruments, Inc. (Dayton, OH)
Sponsoring Org:
Country of Publication:
United States