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See the best of Reuters photography. See more | Photo caption Raging wildfires Raging fires strike Colorado and Utah. Slideshow Health in America An essay of photos taken by Reuters photographers during assignments on health care. Slideshow Scientists develop spray-on battery Tweet Share this Email Print Related News New device powers gadgets through walking Thu, Jun 14 2012 Who you calling dumb? Neanderthals possibly cave artists: study Thu, Jun 14 2012 New front in "open access" science publishing row Wed, Jun 13 2012 Analysis & Opinion Microsoft tablet suffers from lack of greatness Apple’s strategy of built-in obsolescence Related Topics Science » Tech » 1 of 2. A beer stein served as an able substrate for a paintable battery developed at Rice University. Credit: Reuters/Jeff Fitlow/Rice University/Handout By Chris Wickham LONDON | Thu Jun 28, 2012 12:56pm EDT LONDON (Reuters) - Scientists in the United States have developed a paint that can store and deliver electrical power just like a battery. Traditional lithium-ion batteries power most portable electronics. They are already pretty compact but limited to rectangular or cylindrical blocks. Researchers at Rice University in Houston, Texas, have come up with a technique to break down each element of the traditional battery and incorporate it into a liquid that can be spray-painted in layers on virtually any surface. "This means traditional packaging for batteries has given way to a much more flexible approach that allows all kinds of new design and integration possibilities for storage devices," said Pulickel Ajayan, who leads the team on the project. The rechargeable battery is made from spray-painted layers, with each representing the components of a traditional battery: two current collectors, a cathode, an anode and a polymer separator in the middle. The paint layers were airbrushed onto ceramics, glass and stainless steel, and on diverse shapes such as the curved surface of a ceramic mug, to test how well they bond. One limitation of the technology is in the use of difficult-to-handle liquid electrolytes and the need for a dry and oxygen-free environment when making the new device. The researchers are looking for components that would allow construction in the open air for a more efficient production process and greater commercial viability. Neelam Singh, who worked on the project, believes the technology could be integrated with solar cells to give any surface a stand-alone energy capture and storage capability. The researchers tested the device using nine bathroom tiles coated with the paint and connected to each other. When they were charged, the batteries powered a set of light-emitting diodes for six hours, providing a steady 2.4 volts. The results of the study were published on Thursday in the journal Nature Scientific Reports. (Editing by Louise Ireland) Science Tech Tweet this Link this Share this Digg this Email Reprints We welcome comments that advance the story through relevant opinion, anecdotes, links and data. If you see a comment that you believe is irrelevant or inappropriate, you can flag it to our editors by using the report abuse links. Views expressed in the comments do not represent those of Reuters. For more information on our comment policy, see http://blogs.reuters.com/fulldisclosure/2010/09/27/toward-a-more-thoughtful-conversation-on-stories/ Comments (0) Be the first to comment on reuters.com. Add yours using the box above. 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