氢气储存
材料科学
自行车
磁滞
氢
解吸
相(物质)
合金
化学工程
热力学
冶金
化学
物理化学
吸附
凝聚态物理
物理
考古
有机化学
工程类
历史
作者
Jie Xu,Xiangyu Chen,Weijun Zhu,Weirong Zhang,Han Cui,Siqi Zhu,Jingjing Liu,Hongfei Liu,Kai Yan,Honghui Cheng
标识
DOI:10.1016/j.ijhydene.2022.05.071
摘要
Rare-earth AB5-type alloys have been widely studied due to their great application potential in gaseous hydrogen storage, but their overall hydrogen storage properties still need to be further improved for more extensive applications. In this work, the effect of Sn partial substitution for Ni on the plateau characteristics and cycling performance of the LaNi5-xSnx (x = 0, 0.25, 0.5, 0.75, 1) alloys are systematically studied. It is found that the segregation effect caused by Sn addition leads to the multi-CaCu5 phase structure with different cell parameters which may have a positive effect on stabilizing the alloys’ structure during cycling by playing a buffer role. Also, the replacement of Sn element results in a higher anisotropic c/a value, which reduces microstrain and improves the cycle life. The capacity retention after 1000 cycles increases from 83.2% (x = 0) to 95.8% (x = 0.75). Moreover, the addition of Sn significantly reduces the hysteresis of the alloys from 0.212 (x = 0) to 0.023 (x = 0.5) at 383 K, owing to the reduction of the microstrain during hydrogen absorption/desorption.
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