Hydrogen-induced phase transitions in RNi3 and RY2Ni9 (R = La, Ce) compounds

Hydrogen-induced phase transitions in RNi3 and RY2Ni9 (R = La, Ce) compounds
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RNi3 和 RY2Ni9 (R = La, Ce) 化合物中氢诱导的相变

DOI:
10.1016/j.jpowsour.2007.07.043
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发表时间:
2007-10
影响因子:
9.2
通讯作者:
Percheron-Guegan, A.
Percheron-Guegan, A.
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhu, Jian;Fang, Fang;Chen, Guorong;Zheng, Shiyou;Zhang, Jing;Latroche, M.;Sun, Dalin;Percheron-Guegan, A.

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通过固体-H2反应和电化学测量研究了RNi3和RY2Ni9(R=La, Ce)在吸/放氢循环过程中的结构稳定性,以了解导致可逆性差的机理,并揭示RNi3和RY2Ni9化合物之间的差异。研究发现,循环后的RNi3和RY2Ni9均发生部分非晶化。这种氢致非晶化 (HIA) 在 LaNi3 中立即发生,但在 CeNi3、LaY2Ni9 和 CeY2Ni9 中逐渐进行。这些化合物中的 HIA 归因于其晶体结构中的 RM2 亚基。
Structure stability of RNi3and RY2Ni9(R=La, Ce) during cycling of hydrogen absorption/desorption was investigated by both solid-H2reaction and electrochemical measurements, in order to understand the mechanism responsible for the poor reversibility, and to reveal the differences between RNi3and RY2Ni9compounds. It has been found that, all of the cycled RNi3and RY2Ni9were subject to partial amorphization. This hydrogen-induced amorphization (HIA) occurred immediately in LaNi3, but proceeded gradually in CeNi3, LaY2Ni9and CeY2Ni9. The HIA in these compounds is attributed to the RM2subunits in their crystal structures.
DOI: 10.1149/1.1391115
发表时间: 1999
影响因子: --
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