Microstructures and electrochemical properties of LaNi3.8-xAlx hydrogen storage alloys
来源期刊：JOURNAL OF RARE EARTHS2013年第5期
论文作者：王伟 陈云贵 李强 杨维才
文章页码：497 - 501
摘 要：The microstructures and electrochemical properties of LaNi3.8-xAlx （x=0.0,0.1,0.2,0.3 and 0.4） alloys were studied systematically. The microstructures were identified by X-ray diffraction （XRD） and scanning electronic microscopy （SEM）. The main phases were not changed with the substitution of Ni by Al, but minor phases appeared when x=0.4. With Al content increasing, the cell volume increased and the hydrogen storage capacity increased first and then decreased, and the maximum discharge capacity increased from 209.4 mAh/g （x=0.0） to 285.3 mAh/g （x=0.3） and then decreased to 241.3 mAh/g （x=0.4）. Meanwhile, the exchange current density （I0） increased and the diffusion coefficient （D） decreased with the addition of Al.
王伟1，陈云贵2，李强1，杨维才1
1. China Academy of Engineering Physics2. College of Materials Science and Engineering,Sichuan University
摘 要：The microstructures and electrochemical properties of LaNi3.8-xAlx （x=0.0,0.1,0.2,0.3 and 0.4） alloys were studied systematically. The microstructures were identified by X-ray diffraction （XRD） and scanning electronic microscopy （SEM）. The main phases were not changed with the substitution of Ni by Al, but minor phases appeared when x=0.4. With Al content increasing, the cell volume increased and the hydrogen storage capacity increased first and then decreased, and the maximum discharge capacity increased from 209.4 mAh/g （x=0.0） to 285.3 mAh/g （x=0.3） and then decreased to 241.3 mAh/g （x=0.4）. Meanwhile, the exchange current density （I0） increased and the diffusion coefficient （D） decreased with the addition of Al.
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