Water + acid + graphene = power

摘要

Flowing acidic water over a few layers of graphene - atom-thick sheets of carbon-generates ten times the energy previously achieved by running acidic water over carbon nanotubes.Water flowing over carbon nanotubes can produce only a small electric current in the direction of the flow. Nikhil Koratkar at Rensselaer Polytechnic Institute in Troy, New York, and his team added hydrochloric acid to water and streamed it over flat sheets of graphene, generating 85 nanowatts of power using a few hundred square micrometres of graphene film.