A Piece of Rebar Graphene (IMAGE) Rice University Caption This macroscale piece of rebar graphene was formed into a screw shape. The highly conductive foam was tested as an electrode in lithium ion capacitors and found to be mechanically and chemically stable. Credit Tour Group/Rice University Usage Restrictions For news reporting purposes only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.