Researchers from Bar-Ilan University in Israel
have developed rechargeable batteries made from magnesium, a cheap, abundant
and relatively environmentally friendly metal.
The batteries can be recharged as many as 3,000 times, lose power
slowly, and have a working temperature range of -40 to 100 degrees Celsius.
They are also safe and maintenance-free, making them good candidates for
large-size applications like powerplant load-leveling, according to the
The key to making batteries that use magnesium as a positive electrode
was finding suitable negative electrode and electrolyte materials. Batteries
use a cycle of chemical reactions between positive and negative electrodes
to release energy stored in the electrolyte. The researchers' prototype
uses a molybdenum sulfide negative electrode and liquid and solid electrolytes
of organic, or carbon-based, and organo-metallic compounds.
The batteries have an energy density of 60 Watt hours per kilogram,
which is higher than existing nickel cadmium and lead acid batteries, but
lower than lithium batteries. The researchers are working to increase the
energy density of the batteries.
The batteries could be used in practical devices in two to five
years, according to the researchers. The work appeared in the April 9, 2003
issue of Advanced Materials.
Hydrogen storage eased
Flexible display slims
Model explains market
Big qubits linked over
Software maps group
Nanotubes smash length
DNA sensor changes
Sensor serves up
View from the High Ground Q&A
How It Works
News | Blog
Buy an ad link