The University of Stanford has come up with a new idea - paper batteries. According to an article about them:
Simply coating a sheet of paper with ink made of silver and carbon nanomaterials makes an efficient storage device that is 10 times as powerful as lithium-ion batteries used to power laptops.
Paper is a porous material that helps carbon nanotubes and silver nanowire films stick to it, much like ink does.
After it is coated and heated heated the paper becomes super-conductive and works as a battery even if the material is crumpled.
'Taking advantage of the mature paper technology, low cost, light and high-performance energy-storage are realized by using conductive paper as current collectors and electrodes,' the scientists said in research published in the Proceedings of the National Academy of Sciences.
. . .
Peidong Yang, professor of chemistry at the University of California-Berkeley, said the technology could be commercialized within a short time.
There's more at the link.
Here's a video clip of the process of making the batteries, and demonstrating them in operation.
Most interesting! If this technology can be perfected, we should see much smaller, lighter batteries than anything presently on the market. In today's electronic world, that can only be useful.