Hydrogen fuel cells face way more issues than just the skepticism of battery electric vehicle (BEV) advocates. This gas is difficult to store. When it comes from renewable sources, it is expensive.

Engineers developed a fuel cell that offers more than three times as much energy per pound compared to lithium-ion batteries. Powered by a reaction between sodium metal and air, the device could be ...

Batteries are nearing their limits in terms of how much power they can store for a given weight. That’s a serious obstacle for energy innovation and the search for new ways to power airplanes, trains, ...