September 22, 2008
Atom-thin carbon material stores
Modify a one-atom-thick sheet of carbon
with the right molecules and you have the makings of an efficient
way to store lots of electricity.
Chemically modified graphene has high capacitance levels for
carbon materials. High capacitance is a prerequisite for high energy
densities, the hallmark of efficient ultracapacitors. Ultracapacitors
store larger amounts of electricity than batteries and discharge it
more quickly, though they empty more quickly, too.
Researchers are developing lightweight, high-efficiency ultracapacitors
for electric vehicles.
Nano Letters, published online September 13, 2008
Nanoscience and Technology
lab, University of Texas
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