The electrochemical properties of LaxMg3−xNi9 (x=1.0–2.0) hydrogen storage alloys
The electrochemical properties of LaxMg3−xNi9 (x=1.0–2.0) hydrogen storage alloys
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DOI：
10.1016/s0925-8388(03)00083-5
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发表时间：
2003-08
影响因子：
6.2
通讯作者：
B. Liao;Y. Lei;G. Lu;L. X. Chen;H. Pan;Qiu-lin Wang
中科院分区：
文献类型：
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作者：
B. Liao;Y. Lei;G. Lu;L. X. Chen;H. Pan;Qiu-lin Wang
采用粉末烧结法制备了LaxMg 3 − xNi 9（x=1.0-2.0）合金，研究了La部分取代Mg对合金晶体结构和电化学性能的影响。不同La/Mg比的三元合金与六方PuNi 3型结构有关。合金中La/Mg比的增加导致晶胞体积的线性增加。富La合金（x=1.8-2.0）具有放电容量大（约400 mAh/g）、易活化、高倍率放电性能好等优良性能，但循环稳定性有待进一步提高。
LaxMg3−xNi9(x=1.0–2.0) alloys were prepared by a powder sintering method and the influence of partial substitution of Mg by La on the crystal structure and electrochemical performance of the alloys was investigated. The ternary alloys with different La/Mg ratio are related to the hexagonal PuNi3-type structure. The increase of La/Mg ratio in the alloys leads to a linear increase of the unit cell volume. The La-rich alloys (x=1.8–2.0) show promising electrode properties including a large discharge capacity (∼400 mAh/g), easy activation and good high-rate dischargeability, although the cycling stability needs further improvement.