Researchers show a low-cost route to making materials for advanced batteries in electric cars and hybrids.
A new way to make advanced lithium-ion battery materials addresses one of their chief remaining problems: cost. Arumugam Manthiram, a professor of materials engineering at the University of Texas at Austin, has demonstrated that a microwave-based method for making lithium iron phosphate takes less time and uses lower temperatures than conventional methods, which could translate into lower costs.
Lithium iron phosphate is an alternative to the lithium cobalt oxide used in most lithium-ion batteries in laptop computers . It promises to be much cheaper because it uses iron rather than the much more expensive metal cobalt. Although it stores less energy than some other lithium-ion materials, lithium iron phosphate is safer and can be made in ways that allow the material to deliver large bursts of power, properties that make it particularly useful in hybrid vehicles.
ndeed, lithium iron phosphate has become one of the hottest new battery materials. For example, A123 Systems, a startup based in Watertown, MA, that has developed one form of the material, has raised more than $148 million and commercialized batteries for rechargeable power tools that can outperform conventional plug-in tools....MORE
Tuesday, July 29, 2008
Lithium-Ion Batteries for Less
From MIT's Technology Review: