Robuta

https://www.sciencedaily.com/releases/2015/04/150406121400.htm First metal-free catalyst created for rechargeable zinc-air batteries | ScienceDaily Researchers have made what they believe is the first metal-free bifunctional electrocatalyst that performs as well or better than most metal and metal oxide... zinc air batteriesmetal freecatalyst createdfor rechargeablefirst