Researchers from Korea's KAIST institute developed a lithium-air rechargeable battery using a nano fiber graphene composite catalyst. This battery has five times greater storage compared to current lithium-ion batteries, and is the highest performing lithium-air batter ever developed with a good lifespan to boot. Such batteries may enable electric vehicle to travel almost a 1,000 kilometers on a single charge:


http://www.graphene-info.com/graphene-enables-long-lasting-lithium-air-batteries-can-enable-electric-cars-almost-1000-kilometers