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When the graphene "onions" are bathed and charged in an organic electrolyte, they can discharge up to 200 volts every second. If the technology is optimized that number could be further increased several times, said Mochalin.
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Please... Make the awful science stop... It hurts.
Volts are a unit of force, not a measurement of power or of stored energy. To say a battery can put out 200V is utterly meaningless. You can generate 20,000V just by walking across a carpet in socks.
I'll believe in super capacitors as a viable method when they can hold their charge for more than a couple of days and don't explode violently at the drop of a hat.