Nature:
Francois Béguin of the CNRS Research Centre on Divided
Matter in Orléans, France, and his co-workers say that
seaweed, when burned to a charcoal-like form, is just the right
stuff for making the electrodes in state-of-the-art
supercapacitors. The seaweed carbon performs as well as more
expensive commercial devices, and can hold a charge twice as
high without breaking down. They hold up well over time, too:
their charge-storage capacity declines by only 15% after 10,000
cycles of charging and discharging.
Nature
