When I say thin, I mean VERY thin – graphene is one atom thick (almost transparent). And when I say strong, I mean VERY strong. For its very low weight, it is 100 times stronger than steel, as stiff as a diamond, and yet also flexible and even stretchable.
But its other characteristics are most interesting. It conducts heat and electricity with great efficiency (faster at room temperature than any other known material), and it charges and discharges 100x to 1000x faster than traditional batteries.
Right now, it’s expensive.