A rechargeable zinc-air battery.

University of Sydney researchers have developed a three-stage method to recharge zinc-air batteries. 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.

The new method can be used to create bifunctional oxygen electrocatalysts for building rechargeable zinc-air batteries from scratch.

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