Batteries made of paper may power electronics in the future, researchers say.

One experimental paper-based battery has been created by coating a conductive polymer, polypyrrole (PPy), on individual cellulose fibers, which in turn can be molded into paper sheets of exceptionally high internal porosity separated by ordinary filter paper soaked with sodium chloride, serving as the electrolyte.

The battery recharged faster than conventional rechargeable batteries and appears well-suited for applications involving flexible electronics, such as clothing and packaging.