A century ago, a humble nickel–iron battery seemed destined for obscurity, but its rebirth could reshape how we make hydrogen. Today, researchers have fused Edison’s sturdy chemistry with modern renewables, creating a hybrid device that stores power and generates clean fuel. The result is an elegant bridge between intermittent energy and round‑the‑clock demand.
Other systems have to produce hydrogen at atmospheric pressure or close to it. It has to be pressurized later. This one can produce hydrogen already at a high pressure.