Team demonstrates first large-scale graphene fabrication

ORNL demonstrates first large-scale graphene fabrication
ORNL's ultrastrong graphene features layers of graphene and polymers and is an effective conductor of electricity. Credit: ORNL

One of the barriers to using graphene at a commercial scale could be overcome using a method demonstrated by researchers at the Department of Energy's Oak Ridge National Laboratory.

Graphene, a material stronger and stiffer than , has enormous commercial potential but has been impractical to employ on a large scale, with researchers limited to using small flakes of the material.

Now, using , a team led by ORNL's Ivan Vlassiouk has fabricated containing 2-inch-by-2-inch sheets of the one-atom thick hexagonally arranged .

The findings, reported in the journal Applied Materials & Interfaces, could help usher in a new era in flexible electronics and change the way this reinforcing material is viewed and ultimately used.

"Before our work, superb mechanical properties of were shown at a micro scale," said Vlassiouk, a member of ORNL's Energy and Transportation Science Division. "We have extended this to a larger scale, which considerably extends the potential applications and market for graphene."

While most approaches for polymer nanocomposition construction employ tiny flakes of graphene or other carbon nanomaterials that are difficult to disperse in the polymer, Vlassiouk's team used larger sheets of graphene. This eliminates the flake dispersion and agglomeration problems and allows the material to better conduct electricity with less actual graphene in the polymer.

"In our case, we were able to use chemical vapor deposition to make a nanocomposite laminate that is electrically conductive with graphene loading that is 50 times less compared to current state-of-the-art samples," Vlassiouk said. This is a key to making the material competitive on the market.

If Vlassiouk and his team can reduce the cost and demonstrate scalability, researchers envision graphene being used in aerospace (structural monitoring, flame-retardants, anti-icing, conductive), the automotive sector (catalysts, wear-resistant coatings), structural applications (self-cleaning coatings, temperature control materials), electronics (displays, printed electronics, thermal management), energy (photovoltaics, filtration, energy storage) and manufacturing (catalysts, barrier coatings, filtration).


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More information: "Strong and Electrically Conductive Graphene Based Composite Fibers and Laminates," pubs.acs.org/doi/pdf/10.1021/acsami.5b01367
Citation: Team demonstrates first large-scale graphene fabrication (2015, May 14) retrieved 23 August 2019 from https://phys.org/news/2015-05-team-large-scale-graphene-fabrication.html
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May 15, 2015
I had faith in you all along you could figure this out, Science.

May 15, 2015
I had faith in you all along you could figure this out, Science.


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