Rice professor Jim Tour has found a way to mount nanotubes on a sheet of graphene, creating a cheap material with a surface area of over 2,000 square meters per gram. That can store a lot of electricity.

02/27/13- Source: http://www.thestreet.com/story/11852691/1/graphene-the-renewable-energy-solution.html

Image Source: http://www.slate.com/content/dam/slate/articles/health_and_science/alternative_energy/2013/03/
130321_ALTE_GRAPHENE.jpg.CROP.article568-large.jpg