Curved graphene. Yummy.
Imagine an electric car with batteries and ultra capacitors that can soak up all your regenerative braking generation and use it to accelerate the vehicle later. Hugely reducing strain on the battery and increasing lifespan and range. Nice.
More info Skeleton Tech: https://www.skeletontech.com/about
More info European Investment Bank: http://www.eib.org/stories/supercapacitors-and-coconuts