Stability of AB(5)-type hydrogen storage alloys

作者：Wang Xinhua^*; Wang Changyao; Chen Changpin; Wang Qidong

来源：Journal of Alloys and Compounds, 2006, 420(1-2): 107-110.

DOI：10.1016/j.jallcom.2005.10.053

• stability
• hydrogen storage alloy
• hydride
• rare earth

In this paper, we deduced an empirical equation for predicting the stabilities of the hydrides of AB(5)-type compounds with the consideration of the effects of geometrical factor and electric factor. The theoretical curves derived from this equation are in good agreement with the test results of La1-xCaxNi5, Ml(1-x)Ca(x)Ni(5) and La1-xCexNi5 compounds. With this model, we can easily interpret the phenomenon that the initial partial substitution of R by Ca in R1-xCaxNi5 (R is rare earth metal) compounds cause an increase of hydrogen desorption pressure to a maximum value, whereas in the range of larger Ca content x the hydrogen desorption pressure decreases with increasing x.

• 出版日期2006-8-31
• 单位浙江大学