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.
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)