Researchers at the University of Sydney just worked out how to solve one of the biggest problems standing in the way for zinc-air batteries to replace lithium-ion batteries as our go-to for modern electronics.
Zinc-air batteries are batteries powered by zinc metal and oxygen from the air. Becasue of how much zinc metal we have around the world (it’s a lot), these batteries are much cheaper to produce than lithium-ion batteries, and they can also store more energy (theoretically five times more than that of lithium-ion batteries), are much safer and are more environmentally friendly.
Total win-win.
Now, while zinc-air batteries are currently used as an energy source in hearing aids and some film cameras and railway signal devices, their widespread use has been hindered by the fact that, up until now, recharging them has proved difficult. This is because of the lack of electrocatalysts to reduce and generate oxygen during …