giovedì 12 marzo 2009

Revolutionary lithium battery is charging instantly!!

A «ntoped» lithium battery developed by researchers at MIT promises to lead a few years in mobile phones loaded in seconds, laptop computers «fill» a minute and electric cars have to stay in the outlet just five minutes.

The new battery, which is presented in leading British journal Nature, is constructed from materials that are already in mass production of battery-this means that new technology could be exploited commercially within two to three years.


The lithium ion batteries currently used in a huge range of electrical appliances, from mobile phones to hybrid vehicles. Although capable of storing large amounts of energy per unit weight, have the disadvantage of slow be recharged.

The problem is due to the low rate at which lithium ions move through the device.

The lithium batteries «essentially devices that move lithium ions between two electrodes» explains on the website of the Nature o Gkermprant Senter Massachusetts Institute of Technology, headed the study.

Batteries generate electricity when the ions released from the anode electrode, pass through an electrolyte, and ultimately bound by the opposite electrode descent. To recharge the battery, the process is simply reversed.

The researchers were able to dramatically accelerate the process with a small modification to the equipment already used in the cathode electrode of lithium batteries (lithium-iron phosphate).

The coating of the electrode with a thin layer of lithium phosphate facilitates the entry of ions in microscopic tunnels that are in the crystalline structure of the material and thus drastically reduces the recharge time.

Using this new technique, researchers have created prototype battery to fully charged within 9 to 20 seconds.

Since they did not use «exotic» materials, say confident that the technique could easily be adapted for commercial use. Manufacturers of batteries «could do a few years,» said Senter to Reuters.

The only problem, the researcher noted, is that the wiring used for recharging should be strengthened to withstand the extra power.