August 16, 2022

Fold a square in half diagonally. Hold the two ends of the square and fold it along the diagonal line. Then fold one end and again. You now have a paper crane. However, this paper crane looks a little different. It definitely looks like a paper crane, but in fact the art in front of you is not a sheet of paper. It consists of a battery.

Lee Sun-young from the Korea Forest Research Institute (KFRI) and Lee Sang-young from the Ulsan National Institute of Science and Technology (UNIST) and their team have developed a new technology that can be used to make a foldable, windable and bendable lithium-ion battery with nanocellulose from trees.

Advanced Functional Materials, a scientific journal, recently published its research. Last September, the team made their first flexible battery and this time they developed their work into a foldable battery whose shape can be changed. In addition, this new foldable battery lasts three times longer than the previous one.

“We used an environmentally friendly material from trees and this flexible battery lasts a lot longer than the previous ones. We expect this foldable battery to contribute to the advancement of battery technology, ”said Lee Sun-young from KFRI.