Korean scientists have developed a new way
of generating electricity using a few drops of water.
The new method, when commercialized, would be able to supply energy to wearable gadgets
and IoT products. Cho Sung-min reports.
The propeller here is spinning without the help of any energy source.
What enables these plastic blades to rotate is a few drops of water.
Researchers at the Korea Advanced Institute of Science and Technology say an electric
current is generated from the way water is absorbed to a cotton fiber coated with special
carbon particles. As the cotton absorbs hydrogen, the coated
particles on it moves water onto one side of the cloth,…making it one side completely
damp and the other dry. Researchers explain the electricity is generated
as this kinetic process takes place. “When we drop water on the fiber, a reaction
occurs. The electricity is not generated by the water drops themselves, but from the way
hydrogen ion is absorbed to the cloth.” Researchers have also found a way to continue
generating energy even when the cloth is completely dried.
They say calcium chloride, which absorbs humidity from the air, can provide a solution.
The salt crystals, when put on one side of the cloth, create electricity by consuming
moisture from the air containing at least twenty percent of humidity.
Simply put, the cloth can sustain the creation of energy with the help of the particles,…when
it is placed in an environment with specific humidity levels. “We can easily garner more energy by applying
the chlorides and aligning the fibers in a certain way. We can use the power to operate
wearable devices and IoT sensors.” Researchers are currently aiming to come up
with ways to commercialize the energy-creating method.
Their development was recently published in the articles of ‘ACS Nano’, a renowned nano-scientific
journal,…and “Energy & Environmental Science.” Cho Sung-min, Arirang News.