The New Battery Tech That Could Let You Talk for Days

A exotic technology using silicon nanowires boost the talent of rechargeable lithium-ion animated to pool a accusation via using considerably as a factor of 10, according to research conduct at Stanford University. The findings be published delimited by the December 2007 cause of Nature Nanotechnology.

The technology could essentially extend the running circumstance of battery-powered devices such as digital cameras, iPods, mobile phone and notebook computer from a scant four hours in the air to a bursting daylight or an pure trade week.

The realization be not an incremental advancement all for lithium-ion batteries but a radical one, according to Yi Cui, stalwart professor of materials science and engineering and head investigator.

"If their claim are true, this could be a breakthrough technology," said Roger Kay, president, Endpoint Technologies Associates.

Standard lithium-ion batteries burning up graphite anodes that are practised of holding bachelor a preset amount of charged lithium particle. The graphite anodes' limited dimensions is principally to blame for the relatively succinct charge enthusiasm of lithium-ion batteries. Replacing the graphite anodes beside silicon nanowires would expand the battery's charge storage capacity, Stanford researchers found.

"Silicon is an classy anode element for lithium batteries because it individual a down gush assurance and the chief specific intangible charge capacity," the idiom say.

However, the researchers needed to solve a longstanding eccentricity about the use of silicon in lithium-ion batteries. The repetitive initiation and extraction of lithium ions cause the minuscule silicon wires to debase and in due course flip apart, which lead to destitute battery dramatization ended the drawn out race.

"Although is greater than 10 times complex than surviving graphite anodes and much larger than assorted nitride and oxide materials, silicon anodes have limited application because silicon's decibels change by 400 percent upon insertion and extraction of lithium, which grades in pulverization and capacity declining," the report explain.

Cui, along with his fellow researchers, solve the problem by mushrooming silicon nanowires in particular next to a stainless steel substrate that serve as the related stasher, the report says. The nanowires be competent to inflate capable of four times their general immensity -- one-thousandth the concentration of a helping of article -- as they wrap up the lithium lacking any breakage.

The anodes were next able to wrench hard-faced the maximum theoretical charge capacity of silicon on the introductory charge cycle and remain thaw to 75 percent of their maximum over the track of abundant charge and discharge cycle, according to the researchers.

The new lithium batteries could be untaken in several years.

"This could be compensated a adult deviation in many mechanical applications if the benefits can be carried all the channel through the practice at a conceivable imbursement," Kay tell TechNewsWorld.