STUDY OF HYDROGEN STORAGE IN ALUMINUM HYDRIDE COATED SINGLE-WALLED CARBON NANOTUBE

摘要

In this study, we report the hydrogen storage in aluminum hydride coated single-walled carbon nanotube. All the H{sub}2 adsorption is molecular with H-H bond length of 0.756A. The hydrogen storage capacities with half and full coverages are 6.01 (8.3) wt% and 7.2 (10.3) wt%, respectively, without (with) H{sub}3 of AlH{sub}3. At high coverage of AlH{sub}3 (C{sub}10AlH{sub}3) interesting clustering/dimerization of AlH{sub}3 is observed. These systems are quite stable and the H{sub}2 can be extracted from the system without disturbing the C-Al bonding or detaching the AlH{sub}3 from the carbon nanotube. This present study on a full molecular adsorption of hydrogen via light metal-hydride AlH{sub}3 is new and it leads to a practically viable hydrogen storage process.