Highly effective Li2OA/Li3N with ultrafast kinetics for H2 storage

The refueling time and safe hydrogen storage are critical factors in the development of a hydrogen economy for transportation. The finding of a fast and high-capacity H-2 storage material represents a worldwide challenge. The short-term target of the U.S. Department of Energy for a hydrogen storage material is a 4.5 wt % reversible hydrogen capacity. In this paper, we report that reversible 5 wt % H-2 can be reached in only 3 min even at the relatively low temperature of 180 degreesC by a Li2O/Li3N solid material. Furthermore, this material has excellent stability because successive cycles of absorption-desorption did not decrease the reversible hydrogen capacity and absorption rate.