Hydrogen storage properties of destabilized MgH2-Li3AlH6 system

	Hydrogen storage properties of destabilized MgH2-Li3AlH6 system
	Liu, Shu-Sheng 1,3; Sun, Li-Xian 1; Zhang, Jian 1; Zhang, Yao 1; Xu, Fen 2; Xing, Yong-Heng 2; Li, Fen 1; Zhao, Jijun 4; Du, Yong 5; Hu, Wang-Yu 6
刊名	international journal of hydrogen energy
	2010-08-01
卷号	35 期号:15 页码:8122-8129
关键词	Hydrogen storage MgH2 Li3AlH6 Cycle stability Kinetics
英文摘要	to improve the dehydrogenation properties of mgh2, a novel hydrogen storage system, mgh2-li3alh6, is prepared by mechanochemical milling. three physical mixtures containing different mole ratios (1:4, 1:1 and 4:1) of mgh2 and li3alh6 are studied and there exists a mutual destabilization effect between the components. the last mixture shows a capacity of 6.5 wt% h-2 with the lowest starting temperature of dehydrogenation (170 degrees c). first, li3alh6 decomposes into al, lih and h-2, and then the as-formed al can easily destabilize mgh2 to form the intermetallic compound mg17al12 at a temperature of 235 degrees c, which is about 180 degrees c lower than the decomposition temperature of pristine mgh2. finally, the residual mgh2 undergoes a self-decomposition whose apparent activation energy has been reduced by about 22 kj mol(-1) compared with pristine mgh2. at a constant temperature of 250 degrees c, the mixture can dehydrogenate completely under an initial vacuum and rehydrogenate to form mgh2 under 2 mpa h-2, showing good cycle stability after the first cycle with a capacity of 4.5 wt% h-2. the comparison between 4 mgh2+li3alh6 and 4 mgh2 + lialh4 mixtures is also investigated. (c) 2010 professor t. nejat veziroglu. published by elsevier ltd. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; electrochemistry ; energy & fuels
研究领域[WOS]	chemistry ; electrochemistry ; energy & fuels
关键词[WOS]	absorption/desorption properties ; lialh4 ; mgh2 ; microstructure ; magnesium ; composite ; li3alh6
收录类别	SCI ; ISTP
语种	英语
WOS记录号	WOS:000281383900058
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142161]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China 2.Liaoning Normal Univ, Fac Chem & Chem Engn, Liaoning, Peoples R China 3.Chinese Acad Sci, China Grad Sch, Beijing 100049, Peoples R China 4.Dalian Univ Technol, Lab Mat Modificat Laser Electron & Ion Beams, Dalian 116024, Peoples R China 5.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China 6.Hunan Univ, Dept Appl Phys, Changsha 410082, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shu-Sheng,Sun, Li-Xian,Zhang, Jian,et al. Hydrogen storage properties of destabilized MgH2-Li3AlH6 system[J]. international journal of hydrogen energy,2010,35(15):8122-8129.
APA	Liu, Shu-Sheng.,Sun, Li-Xian.,Zhang, Jian.,Zhang, Yao.,Xu, Fen.,...&Deng, Hui-Qiu.(2010).Hydrogen storage properties of destabilized MgH2-Li3AlH6 system.international journal of hydrogen energy,35(15),8122-8129.
MLA	Liu, Shu-Sheng,et al."Hydrogen storage properties of destabilized MgH2-Li3AlH6 system".international journal of hydrogen energy 35.15(2010):8122-8129.