1 Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China 2 Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China 3 Weishan Cisri-Eare Earth Materials Co., Ltd, Jining 277600, Shandong, China 4 Department of Mechanical Engineering, Hebei University, Baoding 071002, Hebei, China
Structure and electrochemical performances of as-milled LaMg12-type alloy–Ni composites
1 Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China 2 Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China 3 Weishan Cisri-Eare Earth Materials Co., Ltd, Jining 277600, Shandong, China 4 Department of Mechanical Engineering, Hebei University, Baoding 071002, Hebei, China
摘要 LaMg11Ni1 x wt.% Ni (x = 100, 200) alloys were prepared by ball milling and researched by various methods to study their structure and electrochemical hydrogen storage property. The outcomes reveal that increasing Ni content contributes to improving its electrochemical performance. Particularly, the discharge capacity of as-milled (40 h) alloy will be increased from 157.3 to 1053.5 mAh/g through enhancing Ni percentage from 100 to 200 wt.% when discharging at 60 mAh/g. Ball milling obviously affects the electrochemical performance of alloys. With milling duration prolonging, the discharge capacity of x = 100 alloy keeps increasing, while that of the x = 200 alloy has a maximum value. Milling time also affects the cycle stability of experimental alloys. Extending milling duration clearly decreases the cycle stability of x = 100 alloy but weakens that of the x = 200 alloy at first and strengthens it later. In addition, prolonging milling time makes the milling prepared x = 100 and 200 alloys get the maximal values of high rate discharge ability of 81.60% and 84.52%, respectively.
Abstract：LaMg11Ni1 x wt.% Ni (x = 100, 200) alloys were prepared by ball milling and researched by various methods to study their structure and electrochemical hydrogen storage property. The outcomes reveal that increasing Ni content contributes to improving its electrochemical performance. Particularly, the discharge capacity of as-milled (40 h) alloy will be increased from 157.3 to 1053.5 mAh/g through enhancing Ni percentage from 100 to 200 wt.% when discharging at 60 mAh/g. Ball milling obviously affects the electrochemical performance of alloys. With milling duration prolonging, the discharge capacity of x = 100 alloy keeps increasing, while that of the x = 200 alloy has a maximum value. Milling time also affects the cycle stability of experimental alloys. Extending milling duration clearly decreases the cycle stability of x = 100 alloy but weakens that of the x = 200 alloy at first and strengthens it later. In addition, prolonging milling time makes the milling prepared x = 100 and 200 alloys get the maximal values of high rate discharge ability of 81.60% and 84.52%, respectively.
Wen-gang Bu,Wei Zhang,Jin-liang Gao, et al. Structure and electrochemical performances of as-milled LaMg12-type alloy–Ni composites[J]. Journal of Iron and Steel Research International, 2019, 26(1): 59-68.
2019, Vol. 26 
