Method to improve the properties of La-Mg-Ni hydrogen storage electrode alloys

被引：0
|
作者：
An, Fuqiang [1 ]
Li, Ping [1 ]
Qu, Xuanhui [1 ,2 ]
Zheng, Xueping [1 ]
机构：
[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
[2] State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
来源：
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | 2008年 / 30卷 / 03期
关键词：
Electrochemical properties - Electrochemistry - Electrodes - Melting - Spark plasma sintering - Vacuum;
D O I：
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中图分类号：
学科分类号：
摘要：
The electrode alloy La0.7Mg0.3Ni2.5Co0.5 prepared by the spark plasma sintering (SPS) technology was used to investigated the improvement in electrochemical properties of La-Mg-Ni hydrogen storage alloys. The experimental results indicated that the maximum discharge capacities of the electrode alloys respectively prepared by SPS and vacuum medium-frequency induction melting were close. Using the SPS technology would decrease the weakening rate of capacity of the electrode alloy. After 150 cycles, the retention rate of capacity was 61.8% for the SPS technology, but 39.6% for the induction melting method. At the same time, the SPS technology would also increase the discharge medium voltage, broaden the discharge platform, and decrease the gradient of the platform.
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页码：263 / 266
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