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Y_2O_3对LaMg_(12)型储氢合金电化学性能的影响

EFFECT OF Y_2O_3 ON ELECTROCHEMICAL PERFORMANCE OF LaMg_(12)-TYPE HYDROGEN STORAGE ALLOY
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摘要 采用熔盐覆盖法制备了LaMg12型储氢合金,利用高能球磨对其进行Y2O3的掺杂,采用X射线衍射来分析合金的相结构,利用Land充放电仪测试合金的电化学性能.结果表明:Y2O3掺杂能改善LaMg12储氢合金的电化学性能,其中球磨20 h对首次放电容量改善最明显,球磨40 h对循环性能影响最大.综合而言,球磨40 h对合金性能的改善效果最好. LaMg12-type hydrogen storage alloy was prepared by melt-salt-covered method.Y2O3 was added by high energy ball milling.The phase structure of the alloy was analyzed by XRD.Electrochemical performance was tested by Land Charge-discharge equipment.The results showed that Y2O3 could improve the electrochemical performance of LaMg12-type hydrogen storage alloy.The effect of LaMg12 ball-milled with 5% Y2O3 not only has the higher initial discharge capacity,but also improves the discharge capacity after 20 cycles.LaMg12-Ni ball-milled for 20h has the highest initial discharge capacity,and for 40 h it has higher cycle stability.
作者 王敬 马兴泰 张莉 吴锋
机构地区 北京理工大学化工与环境学院环境科学工程北京重点实验室
出处 《华南师范大学学报（自然科学版）》 CAS 北大核心 2009年第A01期85-87,共3页 Journal of South China Normal University(Natural Science Edition)
关键词 LaMg12 储氢合金 Y2O3 电化学性能 LaMg12 hydrogen storage alloy Y2O3 electrochemical performance
分类号 TM912.2 [电气工程—电力电子与电力传动]
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参考文献4

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共引文献9

华南师范大学学报（自然科学版）
2009年 第A01期

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