Energy storage has been a leading obstacle to widespread adoption of solar energy, but that may be about to change. A new nature-inspired electrode developed by two scientists at RMIT University in Australia could hold the key to drastically improved storage. Their electrode, which is based on patterns in the western swordfern, could boost the capacity of storage technologies by a staggering 3,000 percent.
The groundbreaking electrode is made with graphene, and according to the university, could open the door to flexible, thin solar capture and storage technology. This would allow us to place a thin film on smartphones, cars, or buildings – enabling them to power themselves with solar energy.
The two researchers found inspiration for their prototype in the veins of the Polystichum munitum, a native western North American fern. Researcher Min Gu said in a statement, “The leaves of the western swordfern are densely crammed with veins, making them extremely efficient for storing energy and transporting water around the plant. Our electrode is based on these fractal shapes – which are self-replicating, like the mini structures within snowflakes – and we’ve used this naturally efficient design to improve solar energy storage at a nano level.”
The electrode could be combined with supercapacitors, which have been combined with solar already but haven’t been widely utilized for storage due to limited capacity. But the scientists’ prototype can increase their capacity 30 times greater than current limits, according to Gu.
The journal Scientific Reports published the research online the end of March. Paper lead author Litty Thekkekara said by using their electrode with a solar cell, we could develop flexible thin film solar, replacing the rigid, bulky solar cells that are limited in use. Smartphone batteries would become a thing of the past, and hybrid cars wouldn’t need charging stations, if scientists could build on this research to develop thin film solar.