Cyclic stability and high rate discharge performance of (La,Mg)5Ni19 multiphase alloy
Cyclic stability and high rate discharge performance of (La,Mg)5Ni19 multiphase alloy
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DOI：
10.1016/j.ijhydene.2010.12.134
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发表时间：
2011-04
影响因子：
7.2
通讯作者：
Z. Liu;Xiaobo Yan;N. Wang;Y. Chai;D. Hou
中科院分区：
文献类型：
--
作者：
Z. Liu;Xiaobo Yan;N. Wang;Y. Chai;D. Hou
研究了（La，Mg）5 Ni 19复相合金的循环稳定性和高倍率放电性能。结果表明，合金经1123 K退火后由Pr 5Co 19型（2 H）、Ce 5Co 19型（3R）、CaCu 5型和Ce 2Ni 7型相组成。Pr_5Co_（19）型（2 H）和Ce_5Co_（19）型（3R）的总相丰度为63.3%。该组成决定了该合金在反复充放氢和充放电过程中具有良好的循环稳定性。该合金在室温下具有较高的高倍率放电容量，在3600 mA/g的电流密度下仍保持140 mA h/g。
The cyclic stability and high rate discharge performance of (La,Mg)5Ni19multiphase alloy were investigated in this work. The results show that the alloy is composed of Pr5Co19-type (2H), Ce5Co19-type (3R), CaCu5-type and Ce2Ni7-type phase after annealing at 1123 K. The total phase abundance of Pr5Co19-type (2H) and Ce5Co19-type (3R) is 63.3%. That composition decides the good cyclic stability both in repeated hydriding/dehydriding and charging/discharging process for this alloy. Moreover, the alloy shows the higher high rate discharge capacity at room temperature and it remains 140 mA h/g at the current density of 3600 mA/g.