https://techxplore.com/news/2018-10-carbon-fiber-energy-body-vehicle.html?fbclid=IwAR04HlVy4ZmPh_d5F7l6gEZX2oRYHAhLijSd6d5wJQvpOGN6cYluumMhPxo A new study has shown that carbon fibre can work as a battery. This would be a huge step for electric vehicles, possibly reducing the mass of aircraft. via Carbon fiber can store energy in the body of a vehicle.