This is not the same graphene.
This graphene has nothing to do with Dan's invention. They are looking for a way to scale btc, the dpos tech is unapplicable there. The name is just a coincidence.
It's been discussed in depth a long time ago when the news first came out.
RE: GRAPHENE Blockchain Technology Running STEEMIT, BITSHARES, EOS so Efficient that Bitcoin Looking At It. Chart - Short Form Post