Spray-On Batteries Could Turn Graffiti Into PowerMario Aguilar6/28/12 9:20pm12EditPromoteDismissUndismissHideGo to permalink Students at Rice University have invented a spray-on lithium-ion battery that could be applied to any surface like Krylon. How does it work? Just spray on each of the different components of a battery in layers. Is it really that easy? Yes, nerds are amazing.