Fast-Charging Graphene Batteries Perfect for Electric Cars
Engineering researchers at Rensselaer Polytechnic Institute made a sheet of paper from the world’s thinnest material, graphene, and then zapped the paper with a laser or camera flash to blemish it with countless cracks, pores and other imperfections. The result is a graphene anode material that can be charged or discharged 10 times faster than conventional graphite anodes used in today’s lithium (Li)-ion batteries.
Rechargeable Li-ion batteries are the industry standard for mobile phones, laptop and tablet computers, electric cars and a range of other devices. While Li-ion batteries have a high energy density and can store large amounts of energy, they suffer from a low power density and are unable to quickly accept or discharge energy. This low power density is why it takes about an hour to charge your mobile phone or laptop battery, and why electric automobile engines cannot rely on batteries alone and require a supercapacitor for high-power functions such as acceleration and braking.
Read more: http://www.laboratoryequipment.com/news/2012/08/fast-charging-graphene-batteries-perfect-electric-cars