Recent studies have led scientists to come up with a lithium-ion battery made out of carbon nanotube-coated which was folded like a map and deliver about 14 times the energy density of common lithium0ion battery.
This type of battery development is not common as the conventional lithium-ion battery is impossible to bend so this development was made out of paper precisely a porous lint-free paper towel coated with a polyvinylidene difluoride to improve adhesion of carbon nanotubes. The whole particle was then soaked into a solution of carbon nanotubes which are then put into powder of lithium titanate oxide, lithium cobalt oxide, and lithium battery electrodes. The battery is completed by adding thin foils of copper and aluminum.
The scientists obtain then a flexible and thin paper based battery with a good energy density based on its volume. They could even increase the energy density by more than 10 times by using the Miura fold to stack the paper-based battery multiple times. The Miura fold is a rigid fold often used in space solar panels but it’s commonly used nowadays in fold-up maps and it allow to completely fold a piece of paper in just a single motion. By using the Miura fold, the scientists obtain a reduction in the surface of the paper based battery by 25 times the original size but the energy was properly increased.
Based on the study, researchers are working to make a more stable, efficient and even increase the energy of the folded paper battery which can eventually be used in consumer electronics. Imagine a big device which can folded into its smallest size thanks to a foldable battery.