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Structure and electrochemical hydrogen storage characteristics of Ce-Mg-Ni-based alloys synthesized by mechanical milling

ISSN号：1002-0721
期刊名称：《中国稀土学报：英文版》
时间：0
分类：TF[冶金工程]
作者机构：[1]College of Material and Metallurgy, lnner Mongolia University of Science and Technology, Baotou 014010, China, [2]Department of Functional Material Re-search, Central Iron and Steel Research Institute, Beijing 100081, China, [3]School oJMaterials, University of Science and Technology Beijing, Beijing 100083, China
相关基金：supported by the National Natural Science Foundations of China（51161015,51371094,51471054）; Natural Science Foundation of Inner Mongolia,China（2015MS0558）

作者：张羊换[1,2], 冯佃臣[1,3], 孙昊[1], 卜文刚[2], 祁焱[2], 郭世海[2]

关键词： CeMg, ₁₂-type, 合金, 机械, milling, nanocrystalline, 并且非结晶, 电气化学的氢存储性能, 稀土元素, CeMg12-type alloy, mechanical milling, nanocrystalline and amorphous, electrochemical hydrogen storage performance, rare earths

中文摘要：

有有 Ni 的 Ni 和 milling 当演员组合金的代替的 Mg 被采用获得 nanocrystalline/amorphous CeMg ₁₁ Ni+x wt.% Ni (x=100， 200 ) 合金并且支持 CeMg ₁₂-type 合金的电气化学的氢存储表演。分析合金的结构的特征为改善提供了机制电气化学的氢存储性质。电气化学的测试证明所有合金就需要一个周期被激活。升起的 Ni 比例在费用分泌物反应上有一个明显的角色。合金在 60 mAh/g 的当前的密度为 x=200 合金为 x=100 合金从 182.0 mAh/g 严厉地增加了到 1010.2 mAh/g 的当工厂(60 h ) 的分泌物能力。而且， milling 时间大部分决定了电气化学的反应的表演。当周期稳定性显然为 x=100 合金减少了，并且首先衰退了然后与 milling 时间为 x=200 合金扩充了延长时，继续与延长 milling 时间一起成长的分泌物能力。另外，有最佳的价值， milling 时间为高率分泌物能力(HRD ) 变化，它为 x=100 合金是 80.3% 并且 86.73% 为 x=200 分别地。

英文摘要：

The substituting Mg with Ni and milling as-cast alloy with Ni were adopted to obtain nanocrystalline/amorphous CeMgnNi＋x wt.%Ni（x=100,200） alloys and promote the electrochemical hydrogen storage performances of CeMg_（12）-type alloys.Analyzing the structural features of the alloys provided a mechanism for ameliorating the electrochemical hydrogen storage properties.The electrochemical tests demonstrated that all the alloys just needed one cycle to be activated.Rising Ni proportion had an obvious role on charge-discharge reaction.The discharge capacities of the as-milled（60 h） alloys increased sharply from 182.0 mAh/gfor x=100 alloy to 1010.2 mAh/gfor x=200 alloy at current density of 60 mAh/g.Furthermore,milling time largely determined the performances of electrochemical reaction.The discharge capacity continued to grow along with prolonging milling time,while the cycle stability obviously decreased for x=100 alloy,and first declined and then augmented for the x=200 alloy with milling time extending.In addition,there was an optimal value with milling time varying for the high rate discharge abilities（HRD）,which was 80.3%for x=100 alloys and 86.73%for x=200,respectively.