Hydrogen storage of Mg-nanocomposites obtained by mechanical grinding.

研究了用球磨法制备的氢氧化镁与锡和碳化硅化合物形成的纳米复合材料中的储氢性能。在氢氧化镁与锡(或碳化硅)形成纳米复合材料后，氢氧化镁的脱附性能(脱附温度和脱氢热)显著提高。对于Sn/MgH2纳米复合材料，球磨MgH2和17at%Sn制得的脱附温度降低到473K。TDS、TG和DSC测试表明，至少有两种氢物种存在：一种是新形成的SnGH2纳米复合材料中的氢，另一种是残留在SnMGH2中的来自MgH2的氢。

Hydrogen storage in Sn/MgH_2 and SiC/MgH_2 nanocomposites which are formed by ball milling of MgH_2 with Sn and SiC compounds has been studied. Upon formation of nanocomposite between MgH_2 and Sn (or SiC), the desorption properties (desorption temperature and enthalpy of dehydriding) of MgH_2 were significantly improved. For Sn/MgH_2, ball milling of MgH_2 and 17 at% Sn resulted in a lowering of the desorption temperature to 473 K. TDS (thermal desorption spectrometry), TG (thermogravimetry) and DSC (differential scanning calorimeter) measurements exhibited the existence of at least two types of hydrogen species in the Sn/MgH_2 nanocomposite; the one was hydrogen in the newly formed Sn/MgH_2 nanocomposite and the other hydrogen derived from MgH_2 remaining in Sn/MgH_2.