Composite Materials based on Light Elements for Hydrogen Storage

摘要: In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nanocomposite materials. The are summarized as follows: the Li-N-H system, such ball milled 1:1 mixture Li amide hydride containing a small amount TiCl3 (1 mol%), large (� 6 mass%) is absorbed desorbed in temperature range from 150 to 250 � with good reversibility high reaction rate. Furthermore, 3Mg(NH2)2 8LiH, 7 mass% reversibly stored 140 220 C, indicating one suitable graphite nanometer sized Fe 2 at.%), chemisorbed by milling for 80 h under less than 1 MPa H2-gas pressure. However, capacity decreases increase pressure (down 4:1 at MPa), while physisorbed increases pressure, reaching up 0:5� 1:0 MPa. Unfortunately, desorption higher 300 C. Therefore, some break-through necessary development carbon-based materials systems. On other hand, nano-composite catalyzed Ni nano-particle or Nb oxide reveals superior reversible properties: 6:5 Especially, metals uniformly dispersed scale surface MgH2, which was produced reduction Nb2O5, best catalyst have studied so far. Thus, it seems that nano-composites nano-particles d-electron transition acceptable practical applications.