Graphene charge

Damaged graphene sheets can act as an anode in a rechargeable battery that take a fraction of the time to recharge compared to conventional lithium-ion batteries, according to research from Rensselaer Polytechnic Institute. Nikhil Koratkar and colleagues have deliberately added imperfections - defects - to graphene "paper", which they say can replace the standard graphite anode to good effect in a lithium battery. The team explains that the lithium ions can exploit the presence of the defects, the cracks and pores, in the graphene sheet to traverse the sheet much more rapidly than they otherwise would. The next step for this research project is to pair the graphene anode material with a high-power cathode material to construct a full battery, the team says.