Research unveils a paper battery

Think about your current battery, big, bulky, hard, and full of chemicals. Somehow, it seems battery research does not move much, otherwise why would you need to have a mobile phone whose smallness is limited by the size of the battery. Cars running on fuel cells have similar large batteries, and even electric cars can only store batteries that will allow 50-60 miles of travel without re-charging. But as we develop newer devices, the demand on batteries to be more capable and to do more is going to grow. So, in a sign that research in this area is alive and kicking, here is a new paper based battery that still has some time to get into production:

Researchers at the Rensselaer Polytechnic Institute in New York have come up with a working prototype of a battery made out of cellulose, a coating of lithium and carbon tubes the size of a virus: a sheet of black paper that stores an electrical charge. While it works on the same principle as any battery for sale in a corner store, the paper battery from Rensselaer is much different than a typical AA. For starters, it can be as large as a newspaper page, or cut to the size of a postage stamp. It can be inserted under human skin, and be powered in part by body fluids.
Dr. Linhardt says the device works, but cost will be the biggest barrier – which is why use in the extreme cold of outer space by customers with budgets running into the billions is the most promising takeoff point for the technology. “If you need something to work in outer space, money is no object,” he said. The paper battery also holds promise in medicine, where it could be implanted under a patient's skin and used to power medical devices such as pacemakers. And it can use electrolytes in bodily fluids such as sweat or blood to draw power. In a paper published yesterday, the Rensselaer team details its efforts, including the use of urine to power a test version in the lab.

As always, the development of such technologies take time, and go through several stages of on / off development, with many such technologies getting actually dumped because of infeasibility, but as long as research remains alive, and the demand for such battery solutions remains high, things will continue to improve.