Battery boost

A battery with extra lithium could last much longer according to scientists at Northwestern University. At first glance, Christopher Wolverton new battery design which uses iron but is also stuffed with lithium shouldn't really work. But experiments show that his lithium-iron-oxide battery design can cycle more lithium ions than its common lithium-cobalt-oxide counterpart. “Our computational prediction of this battery reaction was very exciting," says Wolverton. “The fact that it actually works [in physical tests] is remarkable," he adds. “Not only does the battery have an interesting chemistry because we’re getting electrons from both the metal and oxygen, but we’re using iron,” Wolverton said. “That has the potential to make a better battery that is also cheap.”