​Paper wrapper – the future of battery technology.

Researchers from Arizona State University believe that folding paper lithium-ion batteries can solve many problems of modern mobile electronics.

The new type of battery is really unusual. This is lithium-ion battery, but it looks like a sheet of black paper, which can be folded, twisted into a tube, and can be crumpled, etc. Moreover, scientists have proved that the “paper” battery has in 14 times greater energy density than conventional lithium-ion battery. But that’s not all: the new battery is cheap in production, and thanks to its flexibility, it can be installed in various ways: can be wrapped like packaging paper, can be folded like origami, can be pasted on the walls, etc.

A new lithium-ion battery can be folded like a sheet of paper.

Folding “paper” batteries will be useful to power devices, into which are difficult to fit the usual batteries in a sturdy plastic or metal body. Also, foldable battery can become the basis for a new type of electronics, such as smartphones, which can be folded several times, as a sheet of paper, and you can put it in your pocket.

For the manufacture of new batteries are used carbon nanotubes, lithium powders and thin porous paper substrate Kimwipes. For improving of the adhesion of the carbon nanotubes, scientists also have added a polyvinylidene fluoride. The resulting battery exhibits good conductivity and a relatively stable capacity.

The researchers experimented with different forms of a battery. By simply folding the sheet, the ratio of capacity to the battery area is growing: the battery 6×7 cm folded in 25 layers of 14 times, and an overall battery area is only 1.68 square centimeters.

The new type of battery offers great opportunities for creating of mobile devices. Now, designers can more freely choose the layout of the electronics, and to make flexible devices, because today there are already prototypes of flexible displays.