A hydrogen battery that operates at just 90 °C has been developed by researchers from Japan, overcoming the high-temperature and low-capacity limits of earlier methods. The device works by moving hydride ions through a solid electrolyte, allowing magnesium hydride, which acts as the anode, to repeatedly store and release hydrogen at full capacity. This battery offers a practical way to store hydrogen fuel, paving the way for hydrogen-powered vehicles and clean energy systems. One of the most pre...