15 Apr '11, 7pm
Researchers Create Printed Battery That Stores 40% More Energy
A battery, as you might know, has two primary components: the electrodes and the electrolyte. In lithium-ion batteries, its electrodes swing both ways--serving as either anodes or cathodes--which makes it rechargeable. And with current technology, there is no way to squeeze more juice into these guys. For one, half of the battery is filled with materials incapable of holding a charge--polymers and foils. Secondly, electrodes tap out around 100um. Using bigger ones only decreases the rate at which lithium-ions are absorbed and subsequently the battery's performance.