Hydrogen fuel cell based on solidified calcium hydride combines high efficiency and safety

November 16, 2012 // By Julien Happich
Rohm together with Kyoto-based Aquafairy and Kyoto University, has co-developed compact, lightweight, high-power hydrogen fuel cells designed to power smartphones and other portable devices.

These fuel cells overcome the drawbacks of dry cells, lithium-ion cells, and direct methanol fuel cells, significantly reducing weight and increasing output power while providing a higher level of safety, making it possible to provide power in places where AC power is not available or cannot be used.

By succeeded in solidifying calcium hydride in a sheet configuration using proprietary technologies, Rohm and Aquafairy have been able to generate approximately 4.5 liters of hydrogen from a sheet less than 3cc in volume (measuring 38x38x2mm), providing a power output of 5Whr. The hydrogen fuel cells are compact and can operate at ambient temperatures, making them suitable for use in smartphone chargers, tablet PCs, as power sources outdoors and in remote areas, and in emergency backup power supplies. In addition, they emit no carbon dioxide or hazardous gases and can be disposed of as general waste.

Visit Rohm Semiconductor at www.rohm.com/eu